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PGMPhys.cpp

Last change on this file was 103299, checked in by vboxsync, 3 months ago
VMM/PGMPhys.cpp: Typo, bugref:3409
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1	/* $Id: PGMPhys.cpp 103299 2024-02-11 20:26:46Z vboxsync $ */
2	/** @file
3	* PGM - Page Manager and Monitor, Physical Memory Addressing.
4	*/
5
6	/*
7	* Copyright (C) 2006-2023 Oracle and/or its affiliates.
8	*
9	* This file is part of VirtualBox base platform packages, as
10	* available from https://www.virtualbox.org.
11	*
12	* This program is free software; you can redistribute it and/or
13	* modify it under the terms of the GNU General Public License
14	* as published by the Free Software Foundation, in version 3 of the
15	* License.
16	*
17	* This program is distributed in the hope that it will be useful, but
18	* WITHOUT ANY WARRANTY; without even the implied warranty of
19	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
20	* General Public License for more details.
21	*
22	* You should have received a copy of the GNU General Public License
23	* along with this program; if not, see <https://www.gnu.org/licenses>.
24	*
25	* SPDX-License-Identifier: GPL-3.0-only
26	*/
27
28
29	/*********************************************************************************************************************************
30	* Header Files *
31	*********************************************************************************************************************************/
32	#define LOG_GROUP LOG_GROUP_PGM_PHYS
33	#define VBOX_WITHOUT_PAGING_BIT_FIELDS /* 64-bit bitfields are just asking for trouble. See @bugref{9841} and others. */
34	#include <VBox/vmm/pgm.h>
35	#include <VBox/vmm/iem.h>
36	#include <VBox/vmm/iom.h>
37	#include <VBox/vmm/mm.h>
38	#include <VBox/vmm/nem.h>
39	#include <VBox/vmm/stam.h>
40	#include <VBox/vmm/pdmdev.h>
41	#include "PGMInternal.h"
42	#include <VBox/vmm/vmcc.h>
43
44	#include "PGMInline.h"
45
46	#include <VBox/sup.h>
47	#include <VBox/param.h>
48	#include <VBox/err.h>
49	#include <VBox/log.h>
50	#include <iprt/assert.h>
51	#include <iprt/alloc.h>
52	#include <iprt/asm.h>
53	#ifdef VBOX_STRICT
54	# include <iprt/crc.h>
55	#endif
56	#include <iprt/thread.h>
57	#include <iprt/string.h>
58	#include <iprt/system.h>
59
60
61	/*********************************************************************************************************************************
62	* Defined Constants And Macros *
63	*********************************************************************************************************************************/
64	/** The number of pages to free in one batch. */
65	#define PGMPHYS_FREE_PAGE_BATCH_SIZE 128
66
67
68
69	/*********************************************************************************************************************************
70	* Reading and Writing Guest Pysical Memory *
71	*********************************************************************************************************************************/
72
73	/*
74	* PGMR3PhysReadU8-64
75	* PGMR3PhysWriteU8-64
76	*/
77	#define PGMPHYSFN_READNAME PGMR3PhysReadU8
78	#define PGMPHYSFN_WRITENAME PGMR3PhysWriteU8
79	#define PGMPHYS_DATASIZE 1
80	#define PGMPHYS_DATATYPE uint8_t
81	#include "PGMPhysRWTmpl.h"
82
83	#define PGMPHYSFN_READNAME PGMR3PhysReadU16
84	#define PGMPHYSFN_WRITENAME PGMR3PhysWriteU16
85	#define PGMPHYS_DATASIZE 2
86	#define PGMPHYS_DATATYPE uint16_t
87	#include "PGMPhysRWTmpl.h"
88
89	#define PGMPHYSFN_READNAME PGMR3PhysReadU32
90	#define PGMPHYSFN_WRITENAME PGMR3PhysWriteU32
91	#define PGMPHYS_DATASIZE 4
92	#define PGMPHYS_DATATYPE uint32_t
93	#include "PGMPhysRWTmpl.h"
94
95	#define PGMPHYSFN_READNAME PGMR3PhysReadU64
96	#define PGMPHYSFN_WRITENAME PGMR3PhysWriteU64
97	#define PGMPHYS_DATASIZE 8
98	#define PGMPHYS_DATATYPE uint64_t
99	#include "PGMPhysRWTmpl.h"
100
101
102	/**
103	* EMT worker for PGMR3PhysReadExternal.
104	*/
105	static DECLCALLBACK(int) pgmR3PhysReadExternalEMT(PVM pVM, PRTGCPHYS pGCPhys, void *pvBuf, size_t cbRead,
106	PGMACCESSORIGIN enmOrigin)
107	{
108	VBOXSTRICTRC rcStrict = PGMPhysRead(pVM, *pGCPhys, pvBuf, cbRead, enmOrigin);
109	AssertMsg(rcStrict == VINF_SUCCESS, ("%Rrc\n", VBOXSTRICTRC_VAL(rcStrict))); NOREF(rcStrict);
110	return VINF_SUCCESS;
111	}
112
113
114	/**
115	* Read from physical memory, external users.
116	*
117	* @returns VBox status code.
118	* @retval VINF_SUCCESS.
119	*
120	* @param pVM The cross context VM structure.
121	* @param GCPhys Physical address to read from.
122	* @param pvBuf Where to read into.
123	* @param cbRead How many bytes to read.
124	* @param enmOrigin Who is calling.
125	*
126	* @thread Any but EMTs.
127	*/
128	VMMR3DECL(int) PGMR3PhysReadExternal(PVM pVM, RTGCPHYS GCPhys, void *pvBuf, size_t cbRead, PGMACCESSORIGIN enmOrigin)
129	{
130	VM_ASSERT_OTHER_THREAD(pVM);
131
132	AssertMsgReturn(cbRead > 0, ("don't even think about reading zero bytes!\n"), VINF_SUCCESS);
133	LogFlow(("PGMR3PhysReadExternal: %RGp %d\n", GCPhys, cbRead));
134
135	PGM_LOCK_VOID(pVM);
136
137	/*
138	* Copy loop on ram ranges.
139	*/
140	PPGMRAMRANGE pRam = pgmPhysGetRangeAtOrAbove(pVM, GCPhys);
141	for (;;)
142	{
143	/* Inside range or not? */
144	if (pRam && GCPhys >= pRam->GCPhys)
145	{
146	/*
147	* Must work our way thru this page by page.
148	*/
149	RTGCPHYS off = GCPhys - pRam->GCPhys;
150	while (off < pRam->cb)
151	{
152	unsigned iPage = off >> GUEST_PAGE_SHIFT;
153	PPGMPAGE pPage = &pRam->aPages[iPage];
154
155	/*
156	* If the page has an ALL access handler, we'll have to
157	* delegate the job to EMT.
158	*/
159	if ( PGM_PAGE_HAS_ACTIVE_ALL_HANDLERS(pPage)
160	\|\| PGM_PAGE_IS_SPECIAL_ALIAS_MMIO(pPage))
161	{
162	PGM_UNLOCK(pVM);
163
164	return VMR3ReqPriorityCallWait(pVM, VMCPUID_ANY, (PFNRT)pgmR3PhysReadExternalEMT, 5,
165	pVM, &GCPhys, pvBuf, cbRead, enmOrigin);
166	}
167	Assert(!PGM_PAGE_IS_MMIO_OR_SPECIAL_ALIAS(pPage));
168
169	/*
170	* Simple stuff, go ahead.
171	*/
172	size_t cb = GUEST_PAGE_SIZE - (off & GUEST_PAGE_OFFSET_MASK);
173	if (cb > cbRead)
174	cb = cbRead;
175	PGMPAGEMAPLOCK PgMpLck;
176	const void *pvSrc;
177	int rc = pgmPhysGCPhys2CCPtrInternalReadOnly(pVM, pPage, pRam->GCPhys + off, &pvSrc, &PgMpLck);
178	if (RT_SUCCESS(rc))
179	{
180	memcpy(pvBuf, pvSrc, cb);
181	pgmPhysReleaseInternalPageMappingLock(pVM, &PgMpLck);
182	}
183	else
184	{
185	AssertLogRelMsgFailed(("pgmPhysGCPhys2CCPtrInternalReadOnly failed on %RGp / %R[pgmpage] -> %Rrc\n",
186	pRam->GCPhys + off, pPage, rc));
187	memset(pvBuf, 0xff, cb);
188	}
189
190	/* next page */
191	if (cb >= cbRead)
192	{
193	PGM_UNLOCK(pVM);
194	return VINF_SUCCESS;
195	}
196	cbRead -= cb;
197	off += cb;
198	GCPhys += cb;
199	pvBuf = (char *)pvBuf + cb;
200	} /* walk pages in ram range. */
201	}
202	else
203	{
204	LogFlow(("PGMPhysRead: Unassigned %RGp size=%u\n", GCPhys, cbRead));
205
206	/*
207	* Unassigned address space.
208	*/
209	size_t cb = pRam ? pRam->GCPhys - GCPhys : ~(size_t)0;
210	if (cb >= cbRead)
211	{
212	memset(pvBuf, 0xff, cbRead);
213	break;
214	}
215	memset(pvBuf, 0xff, cb);
216
217	cbRead -= cb;
218	pvBuf = (char *)pvBuf + cb;
219	GCPhys += cb;
220	}
221
222	/* Advance range if necessary. */
223	while (pRam && GCPhys > pRam->GCPhysLast)
224	pRam = pRam->CTX_SUFF(pNext);
225	} /* Ram range walk */
226
227	PGM_UNLOCK(pVM);
228
229	return VINF_SUCCESS;
230	}
231
232
233	/**
234	* EMT worker for PGMR3PhysWriteExternal.
235	*/
236	static DECLCALLBACK(int) pgmR3PhysWriteExternalEMT(PVM pVM, PRTGCPHYS pGCPhys, const void *pvBuf, size_t cbWrite,
237	PGMACCESSORIGIN enmOrigin)
238	{
239	/** @todo VERR_EM_NO_MEMORY */
240	VBOXSTRICTRC rcStrict = PGMPhysWrite(pVM, *pGCPhys, pvBuf, cbWrite, enmOrigin);
241	AssertMsg(rcStrict == VINF_SUCCESS, ("%Rrc\n", VBOXSTRICTRC_VAL(rcStrict))); NOREF(rcStrict);
242	return VINF_SUCCESS;
243	}
244
245
246	/**
247	* Write to physical memory, external users.
248	*
249	* @returns VBox status code.
250	* @retval VINF_SUCCESS.
251	* @retval VERR_EM_NO_MEMORY.
252	*
253	* @param pVM The cross context VM structure.
254	* @param GCPhys Physical address to write to.
255	* @param pvBuf What to write.
256	* @param cbWrite How many bytes to write.
257	* @param enmOrigin Who is calling.
258	*
259	* @thread Any but EMTs.
260	*/
261	VMMDECL(int) PGMR3PhysWriteExternal(PVM pVM, RTGCPHYS GCPhys, const void *pvBuf, size_t cbWrite, PGMACCESSORIGIN enmOrigin)
262	{
263	VM_ASSERT_OTHER_THREAD(pVM);
264
265	AssertMsg(!pVM->pgm.s.fNoMorePhysWrites,
266	("Calling PGMR3PhysWriteExternal after pgmR3Save()! GCPhys=%RGp cbWrite=%#x enmOrigin=%d\n",
267	GCPhys, cbWrite, enmOrigin));
268	AssertMsgReturn(cbWrite > 0, ("don't even think about writing zero bytes!\n"), VINF_SUCCESS);
269	LogFlow(("PGMR3PhysWriteExternal: %RGp %d\n", GCPhys, cbWrite));
270
271	PGM_LOCK_VOID(pVM);
272
273	/*
274	* Copy loop on ram ranges, stop when we hit something difficult.
275	*/
276	PPGMRAMRANGE pRam = pgmPhysGetRangeAtOrAbove(pVM, GCPhys);
277	for (;;)
278	{
279	/* Inside range or not? */
280	if (pRam && GCPhys >= pRam->GCPhys)
281	{
282	/*
283	* Must work our way thru this page by page.
284	*/
285	RTGCPTR off = GCPhys - pRam->GCPhys;
286	while (off < pRam->cb)
287	{
288	RTGCPTR iPage = off >> GUEST_PAGE_SHIFT;
289	PPGMPAGE pPage = &pRam->aPages[iPage];
290
291	/*
292	* Is the page problematic, we have to do the work on the EMT.
293	*
294	* Allocating writable pages and access handlers are
295	* problematic, write monitored pages are simple and can be
296	* dealt with here.
297	*/
298	if ( PGM_PAGE_HAS_ACTIVE_HANDLERS(pPage)
299	\|\| PGM_PAGE_GET_STATE(pPage) != PGM_PAGE_STATE_ALLOCATED
300	\|\| PGM_PAGE_IS_SPECIAL_ALIAS_MMIO(pPage))
301	{
302	if ( PGM_PAGE_GET_STATE(pPage) == PGM_PAGE_STATE_WRITE_MONITORED
303	&& !PGM_PAGE_HAS_ACTIVE_HANDLERS(pPage))
304	pgmPhysPageMakeWriteMonitoredWritable(pVM, pPage, GCPhys);
305	else
306	{
307	PGM_UNLOCK(pVM);
308
309	return VMR3ReqPriorityCallWait(pVM, VMCPUID_ANY, (PFNRT)pgmR3PhysWriteExternalEMT, 5,
310	pVM, &GCPhys, pvBuf, cbWrite, enmOrigin);
311	}
312	}
313	Assert(!PGM_PAGE_IS_MMIO_OR_SPECIAL_ALIAS(pPage));
314
315	/*
316	* Simple stuff, go ahead.
317	*/
318	size_t cb = GUEST_PAGE_SIZE - (off & GUEST_PAGE_OFFSET_MASK);
319	if (cb > cbWrite)
320	cb = cbWrite;
321	PGMPAGEMAPLOCK PgMpLck;
322	void *pvDst;
323	int rc = pgmPhysGCPhys2CCPtrInternal(pVM, pPage, pRam->GCPhys + off, &pvDst, &PgMpLck);
324	if (RT_SUCCESS(rc))
325	{
326	memcpy(pvDst, pvBuf, cb);
327	pgmPhysReleaseInternalPageMappingLock(pVM, &PgMpLck);
328	}
329	else
330	AssertLogRelMsgFailed(("pgmPhysGCPhys2CCPtrInternal failed on %RGp / %R[pgmpage] -> %Rrc\n",
331	pRam->GCPhys + off, pPage, rc));
332
333	/* next page */
334	if (cb >= cbWrite)
335	{
336	PGM_UNLOCK(pVM);
337	return VINF_SUCCESS;
338	}
339
340	cbWrite -= cb;
341	off += cb;
342	GCPhys += cb;
343	pvBuf = (const char *)pvBuf + cb;
344	} /* walk pages in ram range */
345	}
346	else
347	{
348	/*
349	* Unassigned address space, skip it.
350	*/
351	if (!pRam)
352	break;
353	size_t cb = pRam->GCPhys - GCPhys;
354	if (cb >= cbWrite)
355	break;
356	cbWrite -= cb;
357	pvBuf = (const char *)pvBuf + cb;
358	GCPhys += cb;
359	}
360
361	/* Advance range if necessary. */
362	while (pRam && GCPhys > pRam->GCPhysLast)
363	pRam = pRam->CTX_SUFF(pNext);
364	} /* Ram range walk */
365
366	PGM_UNLOCK(pVM);
367	return VINF_SUCCESS;
368	}
369
370
371	/*********************************************************************************************************************************
372	* Mapping Guest Physical Memory *
373	*********************************************************************************************************************************/
374
375	/**
376	* VMR3ReqCall worker for PGMR3PhysGCPhys2CCPtrExternal to make pages writable.
377	*
378	* @returns see PGMR3PhysGCPhys2CCPtrExternal
379	* @param pVM The cross context VM structure.
380	* @param pGCPhys Pointer to the guest physical address.
381	* @param ppv Where to store the mapping address.
382	* @param pLock Where to store the lock.
383	*/
384	static DECLCALLBACK(int) pgmR3PhysGCPhys2CCPtrDelegated(PVM pVM, PRTGCPHYS pGCPhys, void **ppv, PPGMPAGEMAPLOCK pLock)
385	{
386	/*
387	* Just hand it to PGMPhysGCPhys2CCPtr and check that it's not a page with
388	* an access handler after it succeeds.
389	*/
390	int rc = PGM_LOCK(pVM);
391	AssertRCReturn(rc, rc);
392
393	rc = PGMPhysGCPhys2CCPtr(pVM, *pGCPhys, ppv, pLock);
394	if (RT_SUCCESS(rc))
395	{
396	PPGMPAGEMAPTLBE pTlbe;
397	int rc2 = pgmPhysPageQueryTlbe(pVM, *pGCPhys, &pTlbe);
398	AssertFatalRC(rc2);
399	PPGMPAGE pPage = pTlbe->pPage;
400	if (PGM_PAGE_IS_MMIO_OR_SPECIAL_ALIAS(pPage))
401	{
402	PGMPhysReleasePageMappingLock(pVM, pLock);
403	rc = VERR_PGM_PHYS_PAGE_RESERVED;
404	}
405	else if ( PGM_PAGE_HAS_ACTIVE_HANDLERS(pPage)
406	#ifdef PGMPOOL_WITH_OPTIMIZED_DIRTY_PT
407	\|\| pgmPoolIsDirtyPage(pVM, *pGCPhys)
408	#endif
409	)
410	{
411	/* We must flush any corresponding pgm pool page here, otherwise we'll
412	* not be informed about writes and keep bogus gst->shw mappings around.
413	*/
414	pgmPoolFlushPageByGCPhys(pVM, *pGCPhys);
415	Assert(!PGM_PAGE_HAS_ACTIVE_HANDLERS(pPage));
416	/** @todo r=bird: return VERR_PGM_PHYS_PAGE_RESERVED here if it still has
417	* active handlers, see the PGMR3PhysGCPhys2CCPtrExternal docs. */
418	}
419	}
420
421	PGM_UNLOCK(pVM);
422	return rc;
423	}
424
425
426	/**
427	* Requests the mapping of a guest page into ring-3, external threads.
428	*
429	* When you're done with the page, call PGMPhysReleasePageMappingLock() ASAP to
430	* release it.
431	*
432	* This API will assume your intention is to write to the page, and will
433	* therefore replace shared and zero pages. If you do not intend to modify the
434	* page, use the PGMR3PhysGCPhys2CCPtrReadOnlyExternal() API.
435	*
436	* @returns VBox status code.
437	* @retval VINF_SUCCESS on success.
438	* @retval VERR_PGM_PHYS_PAGE_RESERVED it it's a valid page but has no physical
439	* backing or if the page has any active access handlers. The caller
440	* must fall back on using PGMR3PhysWriteExternal.
441	* @retval VERR_PGM_INVALID_GC_PHYSICAL_ADDRESS if it's not a valid physical address.
442	*
443	* @param pVM The cross context VM structure.
444	* @param GCPhys The guest physical address of the page that should be mapped.
445	* @param ppv Where to store the address corresponding to GCPhys.
446	* @param pLock Where to store the lock information that PGMPhysReleasePageMappingLock needs.
447	*
448	* @remark Avoid calling this API from within critical sections (other than the
449	* PGM one) because of the deadlock risk when we have to delegating the
450	* task to an EMT.
451	* @thread Any.
452	*/
453	VMMR3DECL(int) PGMR3PhysGCPhys2CCPtrExternal(PVM pVM, RTGCPHYS GCPhys, void **ppv, PPGMPAGEMAPLOCK pLock)
454	{
455	AssertPtr(ppv);
456	AssertPtr(pLock);
457
458	Assert(VM_IS_EMT(pVM) \|\| !PGMIsLockOwner(pVM));
459
460	int rc = PGM_LOCK(pVM);
461	AssertRCReturn(rc, rc);
462
463	/*
464	* Query the Physical TLB entry for the page (may fail).
465	*/
466	PPGMPAGEMAPTLBE pTlbe;
467	rc = pgmPhysPageQueryTlbe(pVM, GCPhys, &pTlbe);
468	if (RT_SUCCESS(rc))
469	{
470	PPGMPAGE pPage = pTlbe->pPage;
471	if (PGM_PAGE_IS_MMIO_OR_SPECIAL_ALIAS(pPage))
472	rc = VERR_PGM_PHYS_PAGE_RESERVED;
473	else
474	{
475	/*
476	* If the page is shared, the zero page, or being write monitored
477	* it must be converted to an page that's writable if possible.
478	* We can only deal with write monitored pages here, the rest have
479	* to be on an EMT.
480	*/
481	if ( PGM_PAGE_HAS_ACTIVE_HANDLERS(pPage)
482	\|\| PGM_PAGE_GET_STATE(pPage) != PGM_PAGE_STATE_ALLOCATED
483	#ifdef PGMPOOL_WITH_OPTIMIZED_DIRTY_PT
484	\|\| pgmPoolIsDirtyPage(pVM, GCPhys)
485	#endif
486	)
487	{
488	if ( PGM_PAGE_GET_STATE(pPage) == PGM_PAGE_STATE_WRITE_MONITORED
489	&& !PGM_PAGE_HAS_ACTIVE_HANDLERS(pPage)
490	#ifdef PGMPOOL_WITH_OPTIMIZED_DIRTY_PT
491	&& !pgmPoolIsDirtyPage(pVM, GCPhys) /** @todo we're very likely doing this twice. */
492	#endif
493	)
494	pgmPhysPageMakeWriteMonitoredWritable(pVM, pPage, GCPhys);
495	else
496	{
497	PGM_UNLOCK(pVM);
498
499	return VMR3ReqPriorityCallWait(pVM, VMCPUID_ANY, (PFNRT)pgmR3PhysGCPhys2CCPtrDelegated, 4,
500	pVM, &GCPhys, ppv, pLock);
501	}
502	}
503
504	/*
505	* Now, just perform the locking and calculate the return address.
506	*/
507	PPGMPAGEMAP pMap = pTlbe->pMap;
508	if (pMap)
509	pMap->cRefs++;
510
511	unsigned cLocks = PGM_PAGE_GET_WRITE_LOCKS(pPage);
512	if (RT_LIKELY(cLocks < PGM_PAGE_MAX_LOCKS - 1))
513	{
514	if (cLocks == 0)
515	pVM->pgm.s.cWriteLockedPages++;
516	PGM_PAGE_INC_WRITE_LOCKS(pPage);
517	}
518	else if (cLocks != PGM_PAGE_GET_WRITE_LOCKS(pPage))
519	{
520	PGM_PAGE_INC_WRITE_LOCKS(pPage);
521	AssertMsgFailed(("%RGp / %R[pgmpage] is entering permanent write locked state!\n", GCPhys, pPage));
522	if (pMap)
523	pMap->cRefs++; /* Extra ref to prevent it from going away. */
524	}
525
526	ppv = (void )((uintptr_t)pTlbe->pv \| (uintptr_t)(GCPhys & GUEST_PAGE_OFFSET_MASK));
527	pLock->uPageAndType = (uintptr_t)pPage \| PGMPAGEMAPLOCK_TYPE_WRITE;
528	pLock->pvMap = pMap;
529	}
530	}
531
532	PGM_UNLOCK(pVM);
533	return rc;
534	}
535
536
537	/**
538	* Requests the mapping of a guest page into ring-3, external threads.
539	*
540	* When you're done with the page, call PGMPhysReleasePageMappingLock() ASAP to
541	* release it.
542	*
543	* @returns VBox status code.
544	* @retval VINF_SUCCESS on success.
545	* @retval VERR_PGM_PHYS_PAGE_RESERVED it it's a valid page but has no physical
546	* backing or if the page as an active ALL access handler. The caller
547	* must fall back on using PGMPhysRead.
548	* @retval VERR_PGM_INVALID_GC_PHYSICAL_ADDRESS if it's not a valid physical address.
549	*
550	* @param pVM The cross context VM structure.
551	* @param GCPhys The guest physical address of the page that should be mapped.
552	* @param ppv Where to store the address corresponding to GCPhys.
553	* @param pLock Where to store the lock information that PGMPhysReleasePageMappingLock needs.
554	*
555	* @remark Avoid calling this API from within critical sections (other than
556	* the PGM one) because of the deadlock risk.
557	* @thread Any.
558	*/
559	VMMR3DECL(int) PGMR3PhysGCPhys2CCPtrReadOnlyExternal(PVM pVM, RTGCPHYS GCPhys, void const **ppv, PPGMPAGEMAPLOCK pLock)
560	{
561	int rc = PGM_LOCK(pVM);
562	AssertRCReturn(rc, rc);
563
564	/*
565	* Query the Physical TLB entry for the page (may fail).
566	*/
567	PPGMPAGEMAPTLBE pTlbe;
568	rc = pgmPhysPageQueryTlbe(pVM, GCPhys, &pTlbe);
569	if (RT_SUCCESS(rc))
570	{
571	PPGMPAGE pPage = pTlbe->pPage;
572	#if 1
573	/* MMIO pages doesn't have any readable backing. */
574	if (PGM_PAGE_IS_MMIO_OR_SPECIAL_ALIAS(pPage))
575	rc = VERR_PGM_PHYS_PAGE_RESERVED;
576	#else
577	if (PGM_PAGE_HAS_ACTIVE_ALL_HANDLERS(pPage))
578	rc = VERR_PGM_PHYS_PAGE_RESERVED;
579	#endif
580	else
581	{
582	/*
583	* Now, just perform the locking and calculate the return address.
584	*/
585	PPGMPAGEMAP pMap = pTlbe->pMap;
586	if (pMap)
587	pMap->cRefs++;
588
589	unsigned cLocks = PGM_PAGE_GET_READ_LOCKS(pPage);
590	if (RT_LIKELY(cLocks < PGM_PAGE_MAX_LOCKS - 1))
591	{
592	if (cLocks == 0)
593	pVM->pgm.s.cReadLockedPages++;
594	PGM_PAGE_INC_READ_LOCKS(pPage);
595	}
596	else if (cLocks != PGM_PAGE_GET_READ_LOCKS(pPage))
597	{
598	PGM_PAGE_INC_READ_LOCKS(pPage);
599	AssertMsgFailed(("%RGp / %R[pgmpage] is entering permanent readonly locked state!\n", GCPhys, pPage));
600	if (pMap)
601	pMap->cRefs++; /* Extra ref to prevent it from going away. */
602	}
603
604	ppv = (void )((uintptr_t)pTlbe->pv \| (uintptr_t)(GCPhys & GUEST_PAGE_OFFSET_MASK));
605	pLock->uPageAndType = (uintptr_t)pPage \| PGMPAGEMAPLOCK_TYPE_READ;
606	pLock->pvMap = pMap;
607	}
608	}
609
610	PGM_UNLOCK(pVM);
611	return rc;
612	}
613
614
615	/**
616	* Requests the mapping of multiple guest page into ring-3, external threads.
617	*
618	* When you're done with the pages, call PGMPhysBulkReleasePageMappingLock()
619	* ASAP to release them.
620	*
621	* This API will assume your intention is to write to the pages, and will
622	* therefore replace shared and zero pages. If you do not intend to modify the
623	* pages, use the PGMR3PhysBulkGCPhys2CCPtrReadOnlyExternal() API.
624	*
625	* @returns VBox status code.
626	* @retval VINF_SUCCESS on success.
627	* @retval VERR_PGM_PHYS_PAGE_RESERVED if any of the pages has no physical
628	* backing or if any of the pages the page has any active access
629	* handlers. The caller must fall back on using PGMR3PhysWriteExternal.
630	* @retval VERR_PGM_INVALID_GC_PHYSICAL_ADDRESS if @a paGCPhysPages contains
631	* an invalid physical address.
632	*
633	* @param pVM The cross context VM structure.
634	* @param cPages Number of pages to lock.
635	* @param paGCPhysPages The guest physical address of the pages that
636	* should be mapped (@a cPages entries).
637	* @param papvPages Where to store the ring-3 mapping addresses
638	* corresponding to @a paGCPhysPages.
639	* @param paLocks Where to store the locking information that
640	* pfnPhysBulkReleasePageMappingLock needs (@a cPages
641	* in length).
642	*
643	* @remark Avoid calling this API from within critical sections (other than the
644	* PGM one) because of the deadlock risk when we have to delegating the
645	* task to an EMT.
646	* @thread Any.
647	*/
648	VMMR3DECL(int) PGMR3PhysBulkGCPhys2CCPtrExternal(PVM pVM, uint32_t cPages, PCRTGCPHYS paGCPhysPages,
649	void **papvPages, PPGMPAGEMAPLOCK paLocks)
650	{
651	Assert(cPages > 0);
652	AssertPtr(papvPages);
653	AssertPtr(paLocks);
654
655	Assert(VM_IS_EMT(pVM) \|\| !PGMIsLockOwner(pVM));
656
657	int rc = PGM_LOCK(pVM);
658	AssertRCReturn(rc, rc);
659
660	/*
661	* Lock the pages one by one.
662	* The loop body is similar to PGMR3PhysGCPhys2CCPtrExternal.
663	*/
664	int32_t cNextYield = 128;
665	uint32_t iPage;
666	for (iPage = 0; iPage < cPages; iPage++)
667	{
668	if (--cNextYield > 0)
669	{ /* likely */ }
670	else
671	{
672	PGM_UNLOCK(pVM);
673	ASMNopPause();
674	PGM_LOCK_VOID(pVM);
675	cNextYield = 128;
676	}
677
678	/*
679	* Query the Physical TLB entry for the page (may fail).
680	*/
681	PPGMPAGEMAPTLBE pTlbe;
682	rc = pgmPhysPageQueryTlbe(pVM, paGCPhysPages[iPage], &pTlbe);
683	if (RT_SUCCESS(rc))
684	{ }
685	else
686	break;
687	PPGMPAGE pPage = pTlbe->pPage;
688
689	/*
690	* No MMIO or active access handlers.
691	*/
692	if ( !PGM_PAGE_IS_MMIO_OR_SPECIAL_ALIAS(pPage)
693	&& !PGM_PAGE_HAS_ACTIVE_HANDLERS(pPage))
694	{ }
695	else
696	{
697	rc = VERR_PGM_PHYS_PAGE_RESERVED;
698	break;
699	}
700
701	/*
702	* The page must be in the allocated state and not be a dirty pool page.
703	* We can handle converting a write monitored page to an allocated one, but
704	* anything more complicated must be delegated to an EMT.
705	*/
706	bool fDelegateToEmt = false;
707	if (PGM_PAGE_GET_STATE(pPage) == PGM_PAGE_STATE_ALLOCATED)
708	#ifdef PGMPOOL_WITH_OPTIMIZED_DIRTY_PT
709	fDelegateToEmt = pgmPoolIsDirtyPage(pVM, paGCPhysPages[iPage]);
710	#else
711	fDelegateToEmt = false;
712	#endif
713	else if (PGM_PAGE_GET_STATE(pPage) == PGM_PAGE_STATE_WRITE_MONITORED)
714	{
715	#ifdef PGMPOOL_WITH_OPTIMIZED_DIRTY_PT
716	if (!pgmPoolIsDirtyPage(pVM, paGCPhysPages[iPage]))
717	pgmPhysPageMakeWriteMonitoredWritable(pVM, pPage, paGCPhysPages[iPage]);
718	else
719	fDelegateToEmt = true;
720	#endif
721	}
722	else
723	fDelegateToEmt = true;
724	if (!fDelegateToEmt)
725	{ }
726	else
727	{
728	/* We could do this delegation in bulk, but considered too much work vs gain. */
729	PGM_UNLOCK(pVM);
730	rc = VMR3ReqPriorityCallWait(pVM, VMCPUID_ANY, (PFNRT)pgmR3PhysGCPhys2CCPtrDelegated, 4,
731	pVM, &paGCPhysPages[iPage], &papvPages[iPage], &paLocks[iPage]);
732	PGM_LOCK_VOID(pVM);
733	if (RT_FAILURE(rc))
734	break;
735	cNextYield = 128;
736	}
737
738	/*
739	* Now, just perform the locking and address calculation.
740	*/
741	PPGMPAGEMAP pMap = pTlbe->pMap;
742	if (pMap)
743	pMap->cRefs++;
744
745	unsigned cLocks = PGM_PAGE_GET_WRITE_LOCKS(pPage);
746	if (RT_LIKELY(cLocks < PGM_PAGE_MAX_LOCKS - 1))
747	{
748	if (cLocks == 0)
749	pVM->pgm.s.cWriteLockedPages++;
750	PGM_PAGE_INC_WRITE_LOCKS(pPage);
751	}
752	else if (cLocks != PGM_PAGE_GET_WRITE_LOCKS(pPage))
753	{
754	PGM_PAGE_INC_WRITE_LOCKS(pPage);
755	AssertMsgFailed(("%RGp / %R[pgmpage] is entering permanent write locked state!\n", paGCPhysPages[iPage], pPage));
756	if (pMap)
757	pMap->cRefs++; /* Extra ref to prevent it from going away. */
758	}
759
760	papvPages[iPage] = (void *)((uintptr_t)pTlbe->pv \| (uintptr_t)(paGCPhysPages[iPage] & GUEST_PAGE_OFFSET_MASK));
761	paLocks[iPage].uPageAndType = (uintptr_t)pPage \| PGMPAGEMAPLOCK_TYPE_WRITE;
762	paLocks[iPage].pvMap = pMap;
763	}
764
765	PGM_UNLOCK(pVM);
766
767	/*
768	* On failure we must unlock any pages we managed to get already.
769	*/
770	if (RT_FAILURE(rc) && iPage > 0)
771	PGMPhysBulkReleasePageMappingLocks(pVM, iPage, paLocks);
772
773	return rc;
774	}
775
776
777	/**
778	* Requests the mapping of multiple guest page into ring-3, for reading only,
779	* external threads.
780	*
781	* When you're done with the pages, call PGMPhysReleasePageMappingLock() ASAP
782	* to release them.
783	*
784	* @returns VBox status code.
785	* @retval VINF_SUCCESS on success.
786	* @retval VERR_PGM_PHYS_PAGE_RESERVED if any of the pages has no physical
787	* backing or if any of the pages the page has an active ALL access
788	* handler. The caller must fall back on using PGMR3PhysWriteExternal.
789	* @retval VERR_PGM_INVALID_GC_PHYSICAL_ADDRESS if @a paGCPhysPages contains
790	* an invalid physical address.
791	*
792	* @param pVM The cross context VM structure.
793	* @param cPages Number of pages to lock.
794	* @param paGCPhysPages The guest physical address of the pages that
795	* should be mapped (@a cPages entries).
796	* @param papvPages Where to store the ring-3 mapping addresses
797	* corresponding to @a paGCPhysPages.
798	* @param paLocks Where to store the lock information that
799	* pfnPhysReleasePageMappingLock needs (@a cPages
800	* in length).
801	*
802	* @remark Avoid calling this API from within critical sections (other than
803	* the PGM one) because of the deadlock risk.
804	* @thread Any.
805	*/
806	VMMR3DECL(int) PGMR3PhysBulkGCPhys2CCPtrReadOnlyExternal(PVM pVM, uint32_t cPages, PCRTGCPHYS paGCPhysPages,
807	void const **papvPages, PPGMPAGEMAPLOCK paLocks)
808	{
809	Assert(cPages > 0);
810	AssertPtr(papvPages);
811	AssertPtr(paLocks);
812
813	Assert(VM_IS_EMT(pVM) \|\| !PGMIsLockOwner(pVM));
814
815	int rc = PGM_LOCK(pVM);
816	AssertRCReturn(rc, rc);
817
818	/*
819	* Lock the pages one by one.
820	* The loop body is similar to PGMR3PhysGCPhys2CCPtrReadOnlyExternal.
821	*/
822	int32_t cNextYield = 256;
823	uint32_t iPage;
824	for (iPage = 0; iPage < cPages; iPage++)
825	{
826	if (--cNextYield > 0)
827	{ /* likely */ }
828	else
829	{
830	PGM_UNLOCK(pVM);
831	ASMNopPause();
832	PGM_LOCK_VOID(pVM);
833	cNextYield = 256;
834	}
835
836	/*
837	* Query the Physical TLB entry for the page (may fail).
838	*/
839	PPGMPAGEMAPTLBE pTlbe;
840	rc = pgmPhysPageQueryTlbe(pVM, paGCPhysPages[iPage], &pTlbe);
841	if (RT_SUCCESS(rc))
842	{ }
843	else
844	break;
845	PPGMPAGE pPage = pTlbe->pPage;
846
847	/*
848	* No MMIO or active all access handlers, everything else can be accessed.
849	*/
850	if ( !PGM_PAGE_IS_MMIO_OR_SPECIAL_ALIAS(pPage)
851	&& !PGM_PAGE_HAS_ACTIVE_ALL_HANDLERS(pPage))
852	{ }
853	else
854	{
855	rc = VERR_PGM_PHYS_PAGE_RESERVED;
856	break;
857	}
858
859	/*
860	* Now, just perform the locking and address calculation.
861	*/
862	PPGMPAGEMAP pMap = pTlbe->pMap;
863	if (pMap)
864	pMap->cRefs++;
865
866	unsigned cLocks = PGM_PAGE_GET_READ_LOCKS(pPage);
867	if (RT_LIKELY(cLocks < PGM_PAGE_MAX_LOCKS - 1))
868	{
869	if (cLocks == 0)
870	pVM->pgm.s.cReadLockedPages++;
871	PGM_PAGE_INC_READ_LOCKS(pPage);
872	}
873	else if (cLocks != PGM_PAGE_GET_READ_LOCKS(pPage))
874	{
875	PGM_PAGE_INC_READ_LOCKS(pPage);
876	AssertMsgFailed(("%RGp / %R[pgmpage] is entering permanent readonly locked state!\n", paGCPhysPages[iPage], pPage));
877	if (pMap)
878	pMap->cRefs++; /* Extra ref to prevent it from going away. */
879	}
880
881	papvPages[iPage] = (void *)((uintptr_t)pTlbe->pv \| (uintptr_t)(paGCPhysPages[iPage] & GUEST_PAGE_OFFSET_MASK));
882	paLocks[iPage].uPageAndType = (uintptr_t)pPage \| PGMPAGEMAPLOCK_TYPE_READ;
883	paLocks[iPage].pvMap = pMap;
884	}
885
886	PGM_UNLOCK(pVM);
887
888	/*
889	* On failure we must unlock any pages we managed to get already.
890	*/
891	if (RT_FAILURE(rc) && iPage > 0)
892	PGMPhysBulkReleasePageMappingLocks(pVM, iPage, paLocks);
893
894	return rc;
895	}
896
897
898	/**
899	* Converts a GC physical address to a HC ring-3 pointer, with some
900	* additional checks.
901	*
902	* @returns VBox status code.
903	* @retval VINF_SUCCESS on success.
904	* @retval VINF_PGM_PHYS_TLB_CATCH_WRITE and *ppv set if the page has a write
905	* access handler of some kind.
906	* @retval VERR_PGM_PHYS_TLB_CATCH_ALL if the page has a handler catching all
907	* accesses or is odd in any way.
908	* @retval VERR_PGM_PHYS_TLB_UNASSIGNED if the page doesn't exist.
909	*
910	* @param pVM The cross context VM structure.
911	* @param GCPhys The GC physical address to convert. Since this is only
912	* used for filling the REM TLB, the A20 mask must be
913	* applied before calling this API.
914	* @param fWritable Whether write access is required.
915	* @param ppv Where to store the pointer corresponding to GCPhys on
916	* success.
917	*/
918	VMMR3DECL(int) PGMR3PhysTlbGCPhys2Ptr(PVM pVM, RTGCPHYS GCPhys, bool fWritable, void **ppv)
919	{
920	PGM_LOCK_VOID(pVM);
921	PGM_A20_ASSERT_MASKED(VMMGetCpu(pVM), GCPhys);
922
923	PPGMRAMRANGE pRam;
924	PPGMPAGE pPage;
925	int rc = pgmPhysGetPageAndRangeEx(pVM, GCPhys, &pPage, &pRam);
926	if (RT_SUCCESS(rc))
927	{
928	if (PGM_PAGE_IS_BALLOONED(pPage))
929	rc = VINF_PGM_PHYS_TLB_CATCH_WRITE;
930	else if (!PGM_PAGE_HAS_ANY_HANDLERS(pPage))
931	rc = VINF_SUCCESS;
932	else
933	{
934	if (PGM_PAGE_HAS_ACTIVE_ALL_HANDLERS(pPage)) /* catches MMIO */
935	rc = VERR_PGM_PHYS_TLB_CATCH_ALL;
936	else if (PGM_PAGE_HAS_ACTIVE_HANDLERS(pPage))
937	{
938	/** @todo Handle TLB loads of virtual handlers so ./test.sh can be made to work
939	* in -norawr0 mode. */
940	if (fWritable)
941	rc = VINF_PGM_PHYS_TLB_CATCH_WRITE;
942	}
943	else
944	{
945	/* Temporarily disabled physical handler(s), since the recompiler
946	doesn't get notified when it's reset we'll have to pretend it's
947	operating normally. */
948	if (pgmHandlerPhysicalIsAll(pVM, GCPhys))
949	rc = VERR_PGM_PHYS_TLB_CATCH_ALL;
950	else
951	rc = VINF_PGM_PHYS_TLB_CATCH_WRITE;
952	}
953	}
954	if (RT_SUCCESS(rc))
955	{
956	int rc2;
957
958	/* Make sure what we return is writable. */
959	if (fWritable)
960	switch (PGM_PAGE_GET_STATE(pPage))
961	{
962	case PGM_PAGE_STATE_ALLOCATED:
963	break;
964	case PGM_PAGE_STATE_BALLOONED:
965	AssertFailed();
966	break;
967	case PGM_PAGE_STATE_ZERO:
968	case PGM_PAGE_STATE_SHARED:
969	if (rc == VINF_PGM_PHYS_TLB_CATCH_WRITE)
970	break;
971	RT_FALL_THRU();
972	case PGM_PAGE_STATE_WRITE_MONITORED:
973	rc2 = pgmPhysPageMakeWritable(pVM, pPage, GCPhys & ~(RTGCPHYS)GUEST_PAGE_OFFSET_MASK);
974	AssertLogRelRCReturn(rc2, rc2);
975	break;
976	}
977
978	/* Get a ring-3 mapping of the address. */
979	PPGMPAGER3MAPTLBE pTlbe;
980	rc2 = pgmPhysPageQueryTlbe(pVM, GCPhys, &pTlbe);
981	AssertLogRelRCReturn(rc2, rc2);
982	ppv = (void )((uintptr_t)pTlbe->pv \| (uintptr_t)(GCPhys & GUEST_PAGE_OFFSET_MASK));
983	/** @todo mapping/locking hell; this isn't horribly efficient since
984	* pgmPhysPageLoadIntoTlb will repeat the lookup we've done here. */
985
986	Log6(("PGMR3PhysTlbGCPhys2Ptr: GCPhys=%RGp rc=%Rrc pPage=%R[pgmpage] ppv=%p\n", GCPhys, rc, pPage, ppv));
987	}
988	else
989	Log6(("PGMR3PhysTlbGCPhys2Ptr: GCPhys=%RGp rc=%Rrc pPage=%R[pgmpage]\n", GCPhys, rc, pPage));
990
991	/* else: handler catching all access, no pointer returned. */
992	}
993	else
994	rc = VERR_PGM_PHYS_TLB_UNASSIGNED;
995
996	PGM_UNLOCK(pVM);
997	return rc;
998	}
999
1000
1001
1002	/*********************************************************************************************************************************
1003	* RAM Range Management *
1004	*********************************************************************************************************************************/
1005
1006	#define MAKE_LEAF(a_pNode) \
1007	do { \
1008	(a_pNode)->pLeftR3 = NIL_RTR3PTR; \
1009	(a_pNode)->pRightR3 = NIL_RTR3PTR; \
1010	(a_pNode)->pLeftR0 = NIL_RTR0PTR; \
1011	(a_pNode)->pRightR0 = NIL_RTR0PTR; \
1012	} while (0)
1013
1014	#define INSERT_LEFT(a_pParent, a_pNode) \
1015	do { \
1016	(a_pParent)->pLeftR3 = (a_pNode); \
1017	(a_pParent)->pLeftR0 = (a_pNode)->pSelfR0; \
1018	} while (0)
1019	#define INSERT_RIGHT(a_pParent, a_pNode) \
1020	do { \
1021	(a_pParent)->pRightR3 = (a_pNode); \
1022	(a_pParent)->pRightR0 = (a_pNode)->pSelfR0; \
1023	} while (0)
1024
1025
1026	/**
1027	* Recursive tree builder.
1028	*
1029	* @param ppRam Pointer to the iterator variable.
1030	* @param iDepth The current depth. Inserts a leaf node if 0.
1031	*/
1032	static PPGMRAMRANGE pgmR3PhysRebuildRamRangeSearchTreesRecursively(PPGMRAMRANGE *ppRam, int iDepth)
1033	{
1034	PPGMRAMRANGE pRam;
1035	if (iDepth <= 0)
1036	{
1037	/*
1038	* Leaf node.
1039	*/
1040	pRam = *ppRam;
1041	if (pRam)
1042	{
1043	*ppRam = pRam->pNextR3;
1044	MAKE_LEAF(pRam);
1045	}
1046	}
1047	else
1048	{
1049
1050	/*
1051	* Intermediate node.
1052	*/
1053	PPGMRAMRANGE pLeft = pgmR3PhysRebuildRamRangeSearchTreesRecursively(ppRam, iDepth - 1);
1054
1055	pRam = *ppRam;
1056	if (!pRam)
1057	return pLeft;
1058	*ppRam = pRam->pNextR3;
1059	MAKE_LEAF(pRam);
1060	INSERT_LEFT(pRam, pLeft);
1061
1062	PPGMRAMRANGE pRight = pgmR3PhysRebuildRamRangeSearchTreesRecursively(ppRam, iDepth - 1);
1063	if (pRight)
1064	INSERT_RIGHT(pRam, pRight);
1065	}
1066	return pRam;
1067	}
1068
1069
1070	/**
1071	* Rebuilds the RAM range search trees.
1072	*
1073	* @param pVM The cross context VM structure.
1074	*/
1075	static void pgmR3PhysRebuildRamRangeSearchTrees(PVM pVM)
1076	{
1077
1078	/*
1079	* Create the reasonably balanced tree in a sequential fashion.
1080	* For simplicity (laziness) we use standard recursion here.
1081	*/
1082	int iDepth = 0;
1083	PPGMRAMRANGE pRam = pVM->pgm.s.pRamRangesXR3;
1084	PPGMRAMRANGE pRoot = pgmR3PhysRebuildRamRangeSearchTreesRecursively(&pRam, 0);
1085	while (pRam)
1086	{
1087	PPGMRAMRANGE pLeft = pRoot;
1088
1089	pRoot = pRam;
1090	pRam = pRam->pNextR3;
1091	MAKE_LEAF(pRoot);
1092	INSERT_LEFT(pRoot, pLeft);
1093
1094	PPGMRAMRANGE pRight = pgmR3PhysRebuildRamRangeSearchTreesRecursively(&pRam, iDepth);
1095	if (pRight)
1096	INSERT_RIGHT(pRoot, pRight);
1097	/** @todo else: rotate the tree. */
1098
1099	iDepth++;
1100	}
1101
1102	pVM->pgm.s.pRamRangeTreeR3 = pRoot;
1103	pVM->pgm.s.pRamRangeTreeR0 = pRoot ? pRoot->pSelfR0 : NIL_RTR0PTR;
1104
1105	#ifdef VBOX_STRICT
1106	/*
1107	* Verify that the above code works.
1108	*/
1109	unsigned cRanges = 0;
1110	for (pRam = pVM->pgm.s.pRamRangesXR3; pRam; pRam = pRam->pNextR3)
1111	cRanges++;
1112	Assert(cRanges > 0);
1113
1114	unsigned cMaxDepth = ASMBitLastSetU32(cRanges);
1115	if ((1U << cMaxDepth) < cRanges)
1116	cMaxDepth++;
1117
1118	for (pRam = pVM->pgm.s.pRamRangesXR3; pRam; pRam = pRam->pNextR3)
1119	{
1120	unsigned cDepth = 0;
1121	PPGMRAMRANGE pRam2 = pVM->pgm.s.pRamRangeTreeR3;
1122	for (;;)
1123	{
1124	if (pRam == pRam2)
1125	break;
1126	Assert(pRam2);
1127	if (pRam->GCPhys < pRam2->GCPhys)
1128	pRam2 = pRam2->pLeftR3;
1129	else
1130	pRam2 = pRam2->pRightR3;
1131	}
1132	AssertMsg(cDepth <= cMaxDepth, ("cDepth=%d cMaxDepth=%d\n", cDepth, cMaxDepth));
1133	}
1134	#endif /* VBOX_STRICT */
1135	}
1136
1137	#undef MAKE_LEAF
1138	#undef INSERT_LEFT
1139	#undef INSERT_RIGHT
1140
1141	/**
1142	* Relinks the RAM ranges using the pSelfRC and pSelfR0 pointers.
1143	*
1144	* Called when anything was relocated.
1145	*
1146	* @param pVM The cross context VM structure.
1147	*/
1148	void pgmR3PhysRelinkRamRanges(PVM pVM)
1149	{
1150	PPGMRAMRANGE pCur;
1151
1152	#ifdef VBOX_STRICT
1153	for (pCur = pVM->pgm.s.pRamRangesXR3; pCur; pCur = pCur->pNextR3)
1154	{
1155	Assert((pCur->GCPhys & GUEST_PAGE_OFFSET_MASK) == 0);
1156	Assert((pCur->GCPhysLast & GUEST_PAGE_OFFSET_MASK) == GUEST_PAGE_OFFSET_MASK);
1157	Assert((pCur->cb & GUEST_PAGE_OFFSET_MASK) == 0);
1158	Assert(pCur->cb == pCur->GCPhysLast - pCur->GCPhys + 1);
1159	for (PPGMRAMRANGE pCur2 = pVM->pgm.s.pRamRangesXR3; pCur2; pCur2 = pCur2->pNextR3)
1160	Assert( pCur2 == pCur
1161	\|\| strcmp(pCur2->pszDesc, pCur->pszDesc)); /** @todo fix MMIO ranges!! */
1162	}
1163	#endif
1164
1165	pCur = pVM->pgm.s.pRamRangesXR3;
1166	if (pCur)
1167	{
1168	pVM->pgm.s.pRamRangesXR0 = pCur->pSelfR0;
1169
1170	for (; pCur->pNextR3; pCur = pCur->pNextR3)
1171	pCur->pNextR0 = pCur->pNextR3->pSelfR0;
1172
1173	Assert(pCur->pNextR0 == NIL_RTR0PTR);
1174	}
1175	else
1176	{
1177	Assert(pVM->pgm.s.pRamRangesXR0 == NIL_RTR0PTR);
1178	}
1179	ASMAtomicIncU32(&pVM->pgm.s.idRamRangesGen);
1180
1181	pgmR3PhysRebuildRamRangeSearchTrees(pVM);
1182	}
1183
1184
1185	/**
1186	* Links a new RAM range into the list.
1187	*
1188	* @param pVM The cross context VM structure.
1189	* @param pNew Pointer to the new list entry.
1190	* @param pPrev Pointer to the previous list entry. If NULL, insert as head.
1191	*/
1192	static void pgmR3PhysLinkRamRange(PVM pVM, PPGMRAMRANGE pNew, PPGMRAMRANGE pPrev)
1193	{
1194	AssertMsg(pNew->pszDesc, ("%RGp-%RGp\n", pNew->GCPhys, pNew->GCPhysLast));
1195
1196	PGM_LOCK_VOID(pVM);
1197
1198	PPGMRAMRANGE pRam = pPrev ? pPrev->pNextR3 : pVM->pgm.s.pRamRangesXR3;
1199	pNew->pNextR3 = pRam;
1200	pNew->pNextR0 = pRam ? pRam->pSelfR0 : NIL_RTR0PTR;
1201
1202	if (pPrev)
1203	{
1204	pPrev->pNextR3 = pNew;
1205	pPrev->pNextR0 = pNew->pSelfR0;
1206	}
1207	else
1208	{
1209	pVM->pgm.s.pRamRangesXR3 = pNew;
1210	pVM->pgm.s.pRamRangesXR0 = pNew->pSelfR0;
1211	}
1212	ASMAtomicIncU32(&pVM->pgm.s.idRamRangesGen);
1213
1214	pgmR3PhysRebuildRamRangeSearchTrees(pVM);
1215	PGM_UNLOCK(pVM);
1216	}
1217
1218
1219	/**
1220	* Unlink an existing RAM range from the list.
1221	*
1222	* @param pVM The cross context VM structure.
1223	* @param pRam Pointer to the new list entry.
1224	* @param pPrev Pointer to the previous list entry. If NULL, insert as head.
1225	*/
1226	static void pgmR3PhysUnlinkRamRange2(PVM pVM, PPGMRAMRANGE pRam, PPGMRAMRANGE pPrev)
1227	{
1228	Assert(pPrev ? pPrev->pNextR3 == pRam : pVM->pgm.s.pRamRangesXR3 == pRam);
1229
1230	PGM_LOCK_VOID(pVM);
1231
1232	PPGMRAMRANGE pNext = pRam->pNextR3;
1233	if (pPrev)
1234	{
1235	pPrev->pNextR3 = pNext;
1236	pPrev->pNextR0 = pNext ? pNext->pSelfR0 : NIL_RTR0PTR;
1237	}
1238	else
1239	{
1240	Assert(pVM->pgm.s.pRamRangesXR3 == pRam);
1241	pVM->pgm.s.pRamRangesXR3 = pNext;
1242	pVM->pgm.s.pRamRangesXR0 = pNext ? pNext->pSelfR0 : NIL_RTR0PTR;
1243	}
1244	ASMAtomicIncU32(&pVM->pgm.s.idRamRangesGen);
1245
1246	pgmR3PhysRebuildRamRangeSearchTrees(pVM);
1247	PGM_UNLOCK(pVM);
1248	}
1249
1250
1251	/**
1252	* Unlink an existing RAM range from the list.
1253	*
1254	* @param pVM The cross context VM structure.
1255	* @param pRam Pointer to the new list entry.
1256	*/
1257	static void pgmR3PhysUnlinkRamRange(PVM pVM, PPGMRAMRANGE pRam)
1258	{
1259	PGM_LOCK_VOID(pVM);
1260
1261	/* find prev. */
1262	PPGMRAMRANGE pPrev = NULL;
1263	PPGMRAMRANGE pCur = pVM->pgm.s.pRamRangesXR3;
1264	while (pCur != pRam)
1265	{
1266	pPrev = pCur;
1267	pCur = pCur->pNextR3;
1268	}
1269	AssertFatal(pCur);
1270
1271	pgmR3PhysUnlinkRamRange2(pVM, pRam, pPrev);
1272	PGM_UNLOCK(pVM);
1273	}
1274
1275
1276	/**
1277	* Gets the number of ram ranges.
1278	*
1279	* @returns Number of ram ranges. Returns UINT32_MAX if @a pVM is invalid.
1280	* @param pVM The cross context VM structure.
1281	*/
1282	VMMR3DECL(uint32_t) PGMR3PhysGetRamRangeCount(PVM pVM)
1283	{
1284	VM_ASSERT_VALID_EXT_RETURN(pVM, UINT32_MAX);
1285
1286	PGM_LOCK_VOID(pVM);
1287	uint32_t cRamRanges = 0;
1288	for (PPGMRAMRANGE pCur = pVM->pgm.s.CTX_SUFF(pRamRangesX); pCur; pCur = pCur->CTX_SUFF(pNext))
1289	cRamRanges++;
1290	PGM_UNLOCK(pVM);
1291	return cRamRanges;
1292	}
1293
1294
1295	/**
1296	* Get information about a range.
1297	*
1298	* @returns VINF_SUCCESS or VERR_OUT_OF_RANGE.
1299	* @param pVM The cross context VM structure.
1300	* @param iRange The ordinal of the range.
1301	* @param pGCPhysStart Where to return the start of the range. Optional.
1302	* @param pGCPhysLast Where to return the address of the last byte in the
1303	* range. Optional.
1304	* @param ppszDesc Where to return the range description. Optional.
1305	* @param pfIsMmio Where to indicate that this is a pure MMIO range.
1306	* Optional.
1307	*/
1308	VMMR3DECL(int) PGMR3PhysGetRange(PVM pVM, uint32_t iRange, PRTGCPHYS pGCPhysStart, PRTGCPHYS pGCPhysLast,
1309	const char *ppszDesc, bool pfIsMmio)
1310	{
1311	VM_ASSERT_VALID_EXT_RETURN(pVM, VERR_INVALID_VM_HANDLE);
1312
1313	PGM_LOCK_VOID(pVM);
1314	uint32_t iCurRange = 0;
1315	for (PPGMRAMRANGE pCur = pVM->pgm.s.CTX_SUFF(pRamRangesX); pCur; pCur = pCur->CTX_SUFF(pNext), iCurRange++)
1316	if (iCurRange == iRange)
1317	{
1318	if (pGCPhysStart)
1319	*pGCPhysStart = pCur->GCPhys;
1320	if (pGCPhysLast)
1321	*pGCPhysLast = pCur->GCPhysLast;
1322	if (ppszDesc)
1323	*ppszDesc = pCur->pszDesc;
1324	if (pfIsMmio)
1325	*pfIsMmio = !!(pCur->fFlags & PGM_RAM_RANGE_FLAGS_AD_HOC_MMIO);
1326
1327	PGM_UNLOCK(pVM);
1328	return VINF_SUCCESS;
1329	}
1330	PGM_UNLOCK(pVM);
1331	return VERR_OUT_OF_RANGE;
1332	}
1333
1334
1335	/*********************************************************************************************************************************
1336	* RAM *
1337	*********************************************************************************************************************************/
1338
1339	/**
1340	* Frees the specified RAM page and replaces it with the ZERO page.
1341	*
1342	* This is used by ballooning, remapping MMIO2, RAM reset and state loading.
1343	*
1344	* @param pVM The cross context VM structure.
1345	* @param pReq Pointer to the request. This is NULL when doing a
1346	* bulk free in NEM memory mode.
1347	* @param pcPendingPages Where the number of pages waiting to be freed are
1348	* kept. This will normally be incremented. This is
1349	* NULL when doing a bulk free in NEM memory mode.
1350	* @param pPage Pointer to the page structure.
1351	* @param GCPhys The guest physical address of the page, if applicable.
1352	* @param enmNewType New page type for NEM notification, since several
1353	* callers will change the type upon successful return.
1354	*
1355	* @remarks The caller must own the PGM lock.
1356	*/
1357	int pgmPhysFreePage(PVM pVM, PGMMFREEPAGESREQ pReq, uint32_t *pcPendingPages, PPGMPAGE pPage, RTGCPHYS GCPhys,
1358	PGMPAGETYPE enmNewType)
1359	{
1360	/*
1361	* Assert sanity.
1362	*/
1363	PGM_LOCK_ASSERT_OWNER(pVM);
1364	if (RT_UNLIKELY( PGM_PAGE_GET_TYPE(pPage) != PGMPAGETYPE_RAM
1365	&& PGM_PAGE_GET_TYPE(pPage) != PGMPAGETYPE_ROM_SHADOW))
1366	{
1367	AssertMsgFailed(("GCPhys=%RGp pPage=%R[pgmpage]\n", GCPhys, pPage));
1368	return VMSetError(pVM, VERR_PGM_PHYS_NOT_RAM, RT_SRC_POS, "GCPhys=%RGp type=%d", GCPhys, PGM_PAGE_GET_TYPE(pPage));
1369	}
1370
1371	/** @todo What about ballooning of large pages??! */
1372	Assert( PGM_PAGE_GET_PDE_TYPE(pPage) != PGM_PAGE_PDE_TYPE_PDE
1373	&& PGM_PAGE_GET_PDE_TYPE(pPage) != PGM_PAGE_PDE_TYPE_PDE_DISABLED);
1374
1375	if ( PGM_PAGE_IS_ZERO(pPage)
1376	\|\| PGM_PAGE_IS_BALLOONED(pPage))
1377	return VINF_SUCCESS;
1378
1379	const uint32_t idPage = PGM_PAGE_GET_PAGEID(pPage);
1380	Log3(("pgmPhysFreePage: idPage=%#x GCPhys=%RGp pPage=%R[pgmpage]\n", idPage, GCPhys, pPage));
1381	if (RT_UNLIKELY(!PGM_IS_IN_NEM_MODE(pVM)
1382	? idPage == NIL_GMM_PAGEID
1383	\|\| idPage > GMM_PAGEID_LAST
1384	\|\| PGM_PAGE_GET_CHUNKID(pPage) == NIL_GMM_CHUNKID
1385	: idPage != NIL_GMM_PAGEID))
1386	{
1387	AssertMsgFailed(("GCPhys=%RGp pPage=%R[pgmpage]\n", GCPhys, pPage));
1388	return VMSetError(pVM, VERR_PGM_PHYS_INVALID_PAGE_ID, RT_SRC_POS, "GCPhys=%RGp idPage=%#x", GCPhys, pPage);
1389	}
1390	#ifdef VBOX_WITH_NATIVE_NEM
1391	const RTHCPHYS HCPhysPrev = PGM_PAGE_GET_HCPHYS(pPage);
1392	#endif
1393
1394	/* update page count stats. */
1395	if (PGM_PAGE_IS_SHARED(pPage))
1396	pVM->pgm.s.cSharedPages--;
1397	else
1398	pVM->pgm.s.cPrivatePages--;
1399	pVM->pgm.s.cZeroPages++;
1400
1401	/* Deal with write monitored pages. */
1402	if (PGM_PAGE_GET_STATE(pPage) == PGM_PAGE_STATE_WRITE_MONITORED)
1403	{
1404	PGM_PAGE_SET_WRITTEN_TO(pVM, pPage);
1405	pVM->pgm.s.cWrittenToPages++;
1406	}
1407	PGM_PAGE_CLEAR_CODE_PAGE(pVM, pPage); /* No callback needed, IEMTlbInvalidateAllPhysicalAllCpus is called below. */
1408
1409	/*
1410	* pPage = ZERO page.
1411	*/
1412	PGM_PAGE_SET_HCPHYS(pVM, pPage, pVM->pgm.s.HCPhysZeroPg);
1413	PGM_PAGE_SET_STATE(pVM, pPage, PGM_PAGE_STATE_ZERO);
1414	PGM_PAGE_SET_PAGEID(pVM, pPage, NIL_GMM_PAGEID);
1415	PGM_PAGE_SET_PDE_TYPE(pVM, pPage, PGM_PAGE_PDE_TYPE_DONTCARE);
1416	PGM_PAGE_SET_PTE_INDEX(pVM, pPage, 0);
1417	PGM_PAGE_SET_TRACKING(pVM, pPage, 0);
1418
1419	/* Flush physical page map TLB entry. */
1420	pgmPhysInvalidatePageMapTLBEntry(pVM, GCPhys);
1421	IEMTlbInvalidateAllPhysicalAllCpus(pVM, NIL_VMCPUID, IEMTLBPHYSFLUSHREASON_FREED); /// @todo move to the perform step.
1422
1423	#ifdef VBOX_WITH_PGM_NEM_MODE
1424	/*
1425	* Skip the rest if we're doing a bulk free in NEM memory mode.
1426	*/
1427	if (!pReq)
1428	return VINF_SUCCESS;
1429	AssertLogRelReturn(!pVM->pgm.s.fNemMode, VERR_PGM_NOT_SUPPORTED_FOR_NEM_MODE);
1430	#endif
1431
1432	#ifdef VBOX_WITH_NATIVE_NEM
1433	/* Notify NEM. */
1434	/** @todo Remove this one? */
1435	if (VM_IS_NEM_ENABLED(pVM))
1436	{
1437	uint8_t u2State = PGM_PAGE_GET_NEM_STATE(pPage);
1438	NEMHCNotifyPhysPageChanged(pVM, GCPhys, HCPhysPrev, pVM->pgm.s.HCPhysZeroPg, pVM->pgm.s.abZeroPg,
1439	pgmPhysPageCalcNemProtection(pPage, enmNewType), enmNewType, &u2State);
1440	PGM_PAGE_SET_NEM_STATE(pPage, u2State);
1441	}
1442	#else
1443	RT_NOREF(enmNewType);
1444	#endif
1445
1446	/*
1447	* Make sure it's not in the handy page array.
1448	*/
1449	for (uint32_t i = pVM->pgm.s.cHandyPages; i < RT_ELEMENTS(pVM->pgm.s.aHandyPages); i++)
1450	{
1451	if (pVM->pgm.s.aHandyPages[i].idPage == idPage)
1452	{
1453	pVM->pgm.s.aHandyPages[i].HCPhysGCPhys = NIL_GMMPAGEDESC_PHYS;
1454	pVM->pgm.s.aHandyPages[i].fZeroed = false;
1455	pVM->pgm.s.aHandyPages[i].idPage = NIL_GMM_PAGEID;
1456	break;
1457	}
1458	if (pVM->pgm.s.aHandyPages[i].idSharedPage == idPage)
1459	{
1460	pVM->pgm.s.aHandyPages[i].idSharedPage = NIL_GMM_PAGEID;
1461	break;
1462	}
1463	}
1464
1465	/*
1466	* Push it onto the page array.
1467	*/
1468	uint32_t iPage = *pcPendingPages;
1469	Assert(iPage < PGMPHYS_FREE_PAGE_BATCH_SIZE);
1470	*pcPendingPages += 1;
1471
1472	pReq->aPages[iPage].idPage = idPage;
1473
1474	if (iPage + 1 < PGMPHYS_FREE_PAGE_BATCH_SIZE)
1475	return VINF_SUCCESS;
1476
1477	/*
1478	* Flush the pages.
1479	*/
1480	int rc = GMMR3FreePagesPerform(pVM, pReq, PGMPHYS_FREE_PAGE_BATCH_SIZE);
1481	if (RT_SUCCESS(rc))
1482	{
1483	GMMR3FreePagesRePrep(pVM, pReq, PGMPHYS_FREE_PAGE_BATCH_SIZE, GMMACCOUNT_BASE);
1484	*pcPendingPages = 0;
1485	}
1486	return rc;
1487	}
1488
1489
1490	/**
1491	* Frees a range of pages, replacing them with ZERO pages of the specified type.
1492	*
1493	* @returns VBox status code.
1494	* @param pVM The cross context VM structure.
1495	* @param pRam The RAM range in which the pages resides.
1496	* @param GCPhys The address of the first page.
1497	* @param GCPhysLast The address of the last page.
1498	* @param pvMmio2 Pointer to the ring-3 mapping of any MMIO2 memory that
1499	* will replace the pages we're freeing up.
1500	*/
1501	static int pgmR3PhysFreePageRange(PVM pVM, PPGMRAMRANGE pRam, RTGCPHYS GCPhys, RTGCPHYS GCPhysLast, void *pvMmio2)
1502	{
1503	PGM_LOCK_ASSERT_OWNER(pVM);
1504
1505	#ifdef VBOX_WITH_PGM_NEM_MODE
1506	/*
1507	* In simplified memory mode we don't actually free the memory,
1508	* we just unmap it and let NEM do any unlocking of it.
1509	*/
1510	if (pVM->pgm.s.fNemMode)
1511	{
1512	Assert(VM_IS_NEM_ENABLED(pVM) \|\| VM_IS_EXEC_ENGINE_IEM(pVM));
1513	uint8_t u2State = 0; /* (We don't support UINT8_MAX here.) */
1514	if (VM_IS_NEM_ENABLED(pVM))
1515	{
1516	uint32_t const fNemNotify = (pvMmio2 ? NEM_NOTIFY_PHYS_MMIO_EX_F_MMIO2 : 0) \| NEM_NOTIFY_PHYS_MMIO_EX_F_REPLACE;
1517	int rc = NEMR3NotifyPhysMmioExMapEarly(pVM, GCPhys, GCPhysLast - GCPhys + 1, fNemNotify,
1518	pRam->pvR3 ? (uint8_t *)pRam->pvR3 + GCPhys - pRam->GCPhys : NULL,
1519	pvMmio2, &u2State, NULL /puNemRange/);
1520	AssertLogRelRCReturn(rc, rc);
1521	}
1522
1523	/* Iterate the pages. */
1524	PPGMPAGE pPageDst = &pRam->aPages[(GCPhys - pRam->GCPhys) >> GUEST_PAGE_SHIFT];
1525	uint32_t cPagesLeft = ((GCPhysLast - GCPhys) >> GUEST_PAGE_SHIFT) + 1;
1526	while (cPagesLeft-- > 0)
1527	{
1528	int rc = pgmPhysFreePage(pVM, NULL, NULL, pPageDst, GCPhys, PGMPAGETYPE_MMIO);
1529	AssertLogRelRCReturn(rc, rc); /* We're done for if this goes wrong. */
1530
1531	PGM_PAGE_SET_TYPE(pVM, pPageDst, PGMPAGETYPE_MMIO);
1532	PGM_PAGE_SET_NEM_STATE(pPageDst, u2State);
1533
1534	GCPhys += GUEST_PAGE_SIZE;
1535	pPageDst++;
1536	}
1537	return VINF_SUCCESS;
1538	}
1539	#else /* !VBOX_WITH_PGM_NEM_MODE */
1540	RT_NOREF(pvMmio2);
1541	#endif /* !VBOX_WITH_PGM_NEM_MODE */
1542
1543	/*
1544	* Regular mode.
1545	*/
1546	/* Prepare. */
1547	uint32_t cPendingPages = 0;
1548	PGMMFREEPAGESREQ pReq;
1549	int rc = GMMR3FreePagesPrepare(pVM, &pReq, PGMPHYS_FREE_PAGE_BATCH_SIZE, GMMACCOUNT_BASE);
1550	AssertLogRelRCReturn(rc, rc);
1551
1552	#ifdef VBOX_WITH_NATIVE_NEM
1553	/* Tell NEM up-front. */
1554	uint8_t u2State = UINT8_MAX;
1555	if (VM_IS_NEM_ENABLED(pVM))
1556	{
1557	uint32_t const fNemNotify = (pvMmio2 ? NEM_NOTIFY_PHYS_MMIO_EX_F_MMIO2 : 0) \| NEM_NOTIFY_PHYS_MMIO_EX_F_REPLACE;
1558	rc = NEMR3NotifyPhysMmioExMapEarly(pVM, GCPhys, GCPhysLast - GCPhys + 1, fNemNotify, NULL, pvMmio2,
1559	&u2State, NULL /puNemRange/);
1560	AssertLogRelRCReturnStmt(rc, GMMR3FreePagesCleanup(pReq), rc);
1561	}
1562	#endif
1563
1564	/* Iterate the pages. */
1565	PPGMPAGE pPageDst = &pRam->aPages[(GCPhys - pRam->GCPhys) >> GUEST_PAGE_SHIFT];
1566	uint32_t cPagesLeft = ((GCPhysLast - GCPhys) >> GUEST_PAGE_SHIFT) + 1;
1567	while (cPagesLeft-- > 0)
1568	{
1569	rc = pgmPhysFreePage(pVM, pReq, &cPendingPages, pPageDst, GCPhys, PGMPAGETYPE_MMIO);
1570	AssertLogRelRCReturn(rc, rc); /* We're done for if this goes wrong. */
1571
1572	PGM_PAGE_SET_TYPE(pVM, pPageDst, PGMPAGETYPE_MMIO);
1573	#ifdef VBOX_WITH_NATIVE_NEM
1574	if (u2State != UINT8_MAX)
1575	PGM_PAGE_SET_NEM_STATE(pPageDst, u2State);
1576	#endif
1577
1578	GCPhys += GUEST_PAGE_SIZE;
1579	pPageDst++;
1580	}
1581
1582	/* Finish pending and cleanup. */
1583	if (cPendingPages)
1584	{
1585	rc = GMMR3FreePagesPerform(pVM, pReq, cPendingPages);
1586	AssertLogRelRCReturn(rc, rc);
1587	}
1588	GMMR3FreePagesCleanup(pReq);
1589
1590	return rc;
1591	}
1592
1593
1594	/**
1595	* PGMR3PhysRegisterRam worker that initializes and links a RAM range.
1596	*
1597	* In NEM mode, this will allocate the pages backing the RAM range and this may
1598	* fail. NEM registration may also fail. (In regular HM mode it won't fail.)
1599	*
1600	* @returns VBox status code.
1601	* @param pVM The cross context VM structure.
1602	* @param pNew The new RAM range.
1603	* @param GCPhys The address of the RAM range.
1604	* @param GCPhysLast The last address of the RAM range.
1605	* @param R0PtrNew Ditto for R0.
1606	* @param fFlags PGM_RAM_RANGE_FLAGS_FLOATING or zero.
1607	* @param pszDesc The description.
1608	* @param pPrev The previous RAM range (for linking).
1609	*/
1610	static int pgmR3PhysInitAndLinkRamRange(PVM pVM, PPGMRAMRANGE pNew, RTGCPHYS GCPhys, RTGCPHYS GCPhysLast,
1611	RTR0PTR R0PtrNew, uint32_t fFlags, const char *pszDesc, PPGMRAMRANGE pPrev)
1612	{
1613	/*
1614	* Initialize the range.
1615	*/
1616	pNew->pSelfR0 = R0PtrNew;
1617	pNew->GCPhys = GCPhys;
1618	pNew->GCPhysLast = GCPhysLast;
1619	pNew->cb = GCPhysLast - GCPhys + 1;
1620	pNew->pszDesc = pszDesc;
1621	pNew->fFlags = fFlags;
1622	pNew->uNemRange = UINT32_MAX;
1623	pNew->pvR3 = NULL;
1624	pNew->paLSPages = NULL;
1625
1626	uint32_t const cPages = pNew->cb >> GUEST_PAGE_SHIFT;
1627	#ifdef VBOX_WITH_PGM_NEM_MODE
1628	if (!pVM->pgm.s.fNemMode)
1629	#endif
1630	{
1631	RTGCPHYS iPage = cPages;
1632	while (iPage-- > 0)
1633	PGM_PAGE_INIT_ZERO(&pNew->aPages[iPage], pVM, PGMPAGETYPE_RAM);
1634
1635	/* Update the page count stats. */
1636	pVM->pgm.s.cZeroPages += cPages;
1637	pVM->pgm.s.cAllPages += cPages;
1638	}
1639	#ifdef VBOX_WITH_PGM_NEM_MODE
1640	else
1641	{
1642	int rc = SUPR3PageAlloc(RT_ALIGN_Z(pNew->cb, HOST_PAGE_SIZE) >> HOST_PAGE_SHIFT,
1643	pVM->pgm.s.fUseLargePages ? SUP_PAGE_ALLOC_F_LARGE_PAGES : 0, &pNew->pvR3);
1644	if (RT_FAILURE(rc))
1645	return rc;
1646
1647	RTGCPHYS iPage = cPages;
1648	while (iPage-- > 0)
1649	PGM_PAGE_INIT(&pNew->aPages[iPage], UINT64_C(0x0000fffffffff000), NIL_GMM_PAGEID,
1650	PGMPAGETYPE_RAM, PGM_PAGE_STATE_ALLOCATED);
1651
1652	/* Update the page count stats. */
1653	pVM->pgm.s.cPrivatePages += cPages;
1654	pVM->pgm.s.cAllPages += cPages;
1655	}
1656	#endif
1657
1658	/*
1659	* Link it.
1660	*/
1661	pgmR3PhysLinkRamRange(pVM, pNew, pPrev);
1662
1663	#ifdef VBOX_WITH_NATIVE_NEM
1664	/*
1665	* Notify NEM now that it has been linked.
1666	*/
1667	if (VM_IS_NEM_ENABLED(pVM))
1668	{
1669	uint8_t u2State = UINT8_MAX;
1670	int rc = NEMR3NotifyPhysRamRegister(pVM, GCPhys, pNew->cb, pNew->pvR3, &u2State, &pNew->uNemRange);
1671	if (RT_SUCCESS(rc))
1672	{
1673	if (u2State != UINT8_MAX)
1674	pgmPhysSetNemStateForPages(&pNew->aPages[0], cPages, u2State);
1675	}
1676	else
1677	pgmR3PhysUnlinkRamRange2(pVM, pNew, pPrev);
1678	return rc;
1679	}
1680	#endif
1681	return VINF_SUCCESS;
1682	}
1683
1684
1685	/**
1686	* PGMR3PhysRegisterRam worker that registers a high chunk.
1687	*
1688	* @returns VBox status code.
1689	* @param pVM The cross context VM structure.
1690	* @param GCPhys The address of the RAM.
1691	* @param cRamPages The number of RAM pages to register.
1692	* @param iChunk The chunk number.
1693	* @param pszDesc The RAM range description.
1694	* @param ppPrev Previous RAM range pointer. In/Out.
1695	*/
1696	static int pgmR3PhysRegisterHighRamChunk(PVM pVM, RTGCPHYS GCPhys, uint32_t cRamPages, uint32_t iChunk,
1697	const char pszDesc, PPGMRAMRANGE ppPrev)
1698	{
1699	const char *pszDescChunk = iChunk == 0
1700	? pszDesc
1701	: MMR3HeapAPrintf(pVM, MM_TAG_PGM_PHYS, "%s (#%u)", pszDesc, iChunk + 1);
1702	AssertReturn(pszDescChunk, VERR_NO_MEMORY);
1703
1704	/*
1705	* Allocate memory for the new chunk.
1706	*/
1707	size_t const cChunkPages = RT_ALIGN_Z(RT_UOFFSETOF_DYN(PGMRAMRANGE, aPages[cRamPages]), HOST_PAGE_SIZE) >> HOST_PAGE_SHIFT;
1708	PSUPPAGE paChunkPages = (PSUPPAGE)RTMemTmpAllocZ(sizeof(SUPPAGE) * cChunkPages);
1709	AssertReturn(paChunkPages, VERR_NO_TMP_MEMORY);
1710	RTR0PTR R0PtrChunk = NIL_RTR0PTR;
1711	void *pvChunk = NULL;
1712	int rc = SUPR3PageAllocEx(cChunkPages, 0 /fFlags/, &pvChunk, &R0PtrChunk, paChunkPages);
1713	if (RT_SUCCESS(rc))
1714	{
1715	Assert(R0PtrChunk != NIL_RTR0PTR \|\| PGM_IS_IN_NEM_MODE(pVM));
1716	memset(pvChunk, 0, cChunkPages << HOST_PAGE_SHIFT);
1717
1718	PPGMRAMRANGE pNew = (PPGMRAMRANGE)pvChunk;
1719
1720	/*
1721	* Ok, init and link the range.
1722	*/
1723	rc = pgmR3PhysInitAndLinkRamRange(pVM, pNew, GCPhys, GCPhys + ((RTGCPHYS)cRamPages << GUEST_PAGE_SHIFT) - 1,
1724	R0PtrChunk, PGM_RAM_RANGE_FLAGS_FLOATING, pszDescChunk, *ppPrev);
1725	if (RT_SUCCESS(rc))
1726	*ppPrev = pNew;
1727
1728	if (RT_FAILURE(rc))
1729	SUPR3PageFreeEx(pvChunk, cChunkPages);
1730	}
1731
1732	RTMemTmpFree(paChunkPages);
1733	return rc;
1734	}
1735
1736
1737	/**
1738	* Sets up a range RAM.
1739	*
1740	* This will check for conflicting registrations, make a resource
1741	* reservation for the memory (with GMM), and setup the per-page
1742	* tracking structures (PGMPAGE).
1743	*
1744	* @returns VBox status code.
1745	* @param pVM The cross context VM structure.
1746	* @param GCPhys The physical address of the RAM.
1747	* @param cb The size of the RAM.
1748	* @param pszDesc The description - not copied, so, don't free or change it.
1749	*/
1750	VMMR3DECL(int) PGMR3PhysRegisterRam(PVM pVM, RTGCPHYS GCPhys, RTGCPHYS cb, const char *pszDesc)
1751	{
1752	/*
1753	* Validate input.
1754	*/
1755	Log(("PGMR3PhysRegisterRam: GCPhys=%RGp cb=%RGp pszDesc=%s\n", GCPhys, cb, pszDesc));
1756	AssertReturn(RT_ALIGN_T(GCPhys, GUEST_PAGE_SIZE, RTGCPHYS) == GCPhys, VERR_INVALID_PARAMETER);
1757	AssertReturn(RT_ALIGN_T(cb, GUEST_PAGE_SIZE, RTGCPHYS) == cb, VERR_INVALID_PARAMETER);
1758	AssertReturn(cb > 0, VERR_INVALID_PARAMETER);
1759	RTGCPHYS GCPhysLast = GCPhys + (cb - 1);
1760	AssertMsgReturn(GCPhysLast > GCPhys, ("The range wraps! GCPhys=%RGp cb=%RGp\n", GCPhys, cb), VERR_INVALID_PARAMETER);
1761	AssertPtrReturn(pszDesc, VERR_INVALID_POINTER);
1762	VM_ASSERT_EMT_RETURN(pVM, VERR_VM_THREAD_NOT_EMT);
1763
1764	PGM_LOCK_VOID(pVM);
1765
1766	/*
1767	* Find range location and check for conflicts.
1768	*/
1769	PPGMRAMRANGE pPrev = NULL;
1770	PPGMRAMRANGE pRam = pVM->pgm.s.pRamRangesXR3;
1771	while (pRam && GCPhysLast >= pRam->GCPhys)
1772	{
1773	AssertLogRelMsgReturnStmt( GCPhysLast < pRam->GCPhys
1774	\|\| GCPhys > pRam->GCPhysLast,
1775	("%RGp-%RGp (%s) conflicts with existing %RGp-%RGp (%s)\n",
1776	GCPhys, GCPhysLast, pszDesc, pRam->GCPhys, pRam->GCPhysLast, pRam->pszDesc),
1777	PGM_UNLOCK(pVM), VERR_PGM_RAM_CONFLICT);
1778
1779	/* next */
1780	pPrev = pRam;
1781	pRam = pRam->pNextR3;
1782	}
1783
1784	/*
1785	* Register it with GMM (the API bitches).
1786	*/
1787	const RTGCPHYS cPages = cb >> GUEST_PAGE_SHIFT;
1788	int rc = MMR3IncreaseBaseReservation(pVM, cPages);
1789	if (RT_FAILURE(rc))
1790	{
1791	PGM_UNLOCK(pVM);
1792	return rc;
1793	}
1794
1795	if ( GCPhys >= _4G
1796	&& cPages > 256)
1797	{
1798	/*
1799	* The PGMRAMRANGE structures for the high memory can get very big.
1800	* There used to be some limitations on SUPR3PageAllocEx allocation
1801	* sizes, so traditionally we limited this to 16MB chunks. These days
1802	* we do ~64 MB chunks each covering 16GB of guest RAM, making sure
1803	* each range is a multiple of 1GB to enable eager hosts to use 1GB
1804	* pages in NEM mode.
1805	*
1806	* See also pgmR3PhysMmio2CalcChunkCount.
1807	*/
1808	uint32_t const cPagesPerChunk = _4M;
1809	Assert(RT_ALIGN_32(cPagesPerChunk, X86_PD_PAE_SHIFT - X86_PAGE_SHIFT)); /* NEM large page requirement: 1GB pages. */
1810
1811	RTGCPHYS cPagesLeft = cPages;
1812	RTGCPHYS GCPhysChunk = GCPhys;
1813	uint32_t iChunk = 0;
1814	while (cPagesLeft > 0)
1815	{
1816	uint32_t cPagesInChunk = cPagesLeft;
1817	if (cPagesInChunk > cPagesPerChunk)
1818	cPagesInChunk = cPagesPerChunk;
1819
1820	rc = pgmR3PhysRegisterHighRamChunk(pVM, GCPhysChunk, cPagesInChunk, iChunk, pszDesc, &pPrev);
1821	AssertRCReturn(rc, rc);
1822
1823	/* advance */
1824	GCPhysChunk += (RTGCPHYS)cPagesInChunk << GUEST_PAGE_SHIFT;
1825	cPagesLeft -= cPagesInChunk;
1826	iChunk++;
1827	}
1828	}
1829	else
1830	{
1831	/*
1832	* Allocate, initialize and link the new RAM range.
1833	*/
1834	const size_t cbRamRange = RT_UOFFSETOF_DYN(PGMRAMRANGE, aPages[cPages]);
1835	PPGMRAMRANGE pNew = NULL;
1836	RTR0PTR pNewR0 = NIL_RTR0PTR;
1837	rc = SUPR3PageAllocEx(RT_ALIGN_Z(cbRamRange, HOST_PAGE_SIZE) >> HOST_PAGE_SHIFT, 0 /fFlags/,
1838	(void *)&pNew, &pNewR0, NULL /paPages*/);
1839	AssertLogRelMsgRCReturn(rc, ("rc=%Rrc cbRamRange=%zu\n", rc, cbRamRange), rc);
1840
1841	rc = pgmR3PhysInitAndLinkRamRange(pVM, pNew, GCPhys, GCPhysLast, pNewR0, 0 /fFlags/, pszDesc, pPrev);
1842	AssertLogRelMsgRCReturn(rc, ("rc=%Rrc cbRamRange=%zu\n", rc, cbRamRange), rc);
1843	}
1844	pgmPhysInvalidatePageMapTLB(pVM);
1845
1846	PGM_UNLOCK(pVM);
1847	return rc;
1848	}
1849
1850
1851	/**
1852	* Worker called by PGMR3InitFinalize if we're configured to pre-allocate RAM.
1853	*
1854	* We do this late in the init process so that all the ROM and MMIO ranges have
1855	* been registered already and we don't go wasting memory on them.
1856	*
1857	* @returns VBox status code.
1858	*
1859	* @param pVM The cross context VM structure.
1860	*/
1861	int pgmR3PhysRamPreAllocate(PVM pVM)
1862	{
1863	Assert(pVM->pgm.s.fRamPreAlloc);
1864	Log(("pgmR3PhysRamPreAllocate: enter\n"));
1865	#ifdef VBOX_WITH_PGM_NEM_MODE
1866	AssertLogRelReturn(!pVM->pgm.s.fNemMode, VERR_PGM_NOT_SUPPORTED_FOR_NEM_MODE);
1867	#endif
1868
1869	/*
1870	* Walk the RAM ranges and allocate all RAM pages, halt at
1871	* the first allocation error.
1872	*/
1873	uint64_t cPages = 0;
1874	uint64_t NanoTS = RTTimeNanoTS();
1875	PGM_LOCK_VOID(pVM);
1876	for (PPGMRAMRANGE pRam = pVM->pgm.s.pRamRangesXR3; pRam; pRam = pRam->pNextR3)
1877	{
1878	PPGMPAGE pPage = &pRam->aPages[0];
1879	RTGCPHYS GCPhys = pRam->GCPhys;
1880	uint32_t cLeft = pRam->cb >> GUEST_PAGE_SHIFT;
1881	while (cLeft-- > 0)
1882	{
1883	if (PGM_PAGE_GET_TYPE(pPage) == PGMPAGETYPE_RAM)
1884	{
1885	switch (PGM_PAGE_GET_STATE(pPage))
1886	{
1887	case PGM_PAGE_STATE_ZERO:
1888	{
1889	int rc = pgmPhysAllocPage(pVM, pPage, GCPhys);
1890	if (RT_FAILURE(rc))
1891	{
1892	LogRel(("PGM: RAM Pre-allocation failed at %RGp (in %s) with rc=%Rrc\n", GCPhys, pRam->pszDesc, rc));
1893	PGM_UNLOCK(pVM);
1894	return rc;
1895	}
1896	cPages++;
1897	break;
1898	}
1899
1900	case PGM_PAGE_STATE_BALLOONED:
1901	case PGM_PAGE_STATE_ALLOCATED:
1902	case PGM_PAGE_STATE_WRITE_MONITORED:
1903	case PGM_PAGE_STATE_SHARED:
1904	/* nothing to do here. */
1905	break;
1906	}
1907	}
1908
1909	/* next */
1910	pPage++;
1911	GCPhys += GUEST_PAGE_SIZE;
1912	}
1913	}
1914	PGM_UNLOCK(pVM);
1915	NanoTS = RTTimeNanoTS() - NanoTS;
1916
1917	LogRel(("PGM: Pre-allocated %llu pages in %llu ms\n", cPages, NanoTS / 1000000));
1918	Log(("pgmR3PhysRamPreAllocate: returns VINF_SUCCESS\n"));
1919	return VINF_SUCCESS;
1920	}
1921
1922
1923	/**
1924	* Checks shared page checksums.
1925	*
1926	* @param pVM The cross context VM structure.
1927	*/
1928	void pgmR3PhysAssertSharedPageChecksums(PVM pVM)
1929	{
1930	#ifdef VBOX_STRICT
1931	PGM_LOCK_VOID(pVM);
1932
1933	if (pVM->pgm.s.cSharedPages > 0)
1934	{
1935	/*
1936	* Walk the ram ranges.
1937	*/
1938	for (PPGMRAMRANGE pRam = pVM->pgm.s.pRamRangesXR3; pRam; pRam = pRam->pNextR3)
1939	{
1940	uint32_t iPage = pRam->cb >> GUEST_PAGE_SHIFT;
1941	AssertMsg(((RTGCPHYS)iPage << GUEST_PAGE_SHIFT) == pRam->cb,
1942	("%RGp %RGp\n", (RTGCPHYS)iPage << GUEST_PAGE_SHIFT, pRam->cb));
1943
1944	while (iPage-- > 0)
1945	{
1946	PPGMPAGE pPage = &pRam->aPages[iPage];
1947	if (PGM_PAGE_IS_SHARED(pPage))
1948	{
1949	uint32_t u32Checksum = pPage->s.u2Unused0/* \| ((uint32_t)pPage->s.u2Unused1 << 8)*/;
1950	if (!u32Checksum)
1951	{
1952	RTGCPHYS GCPhysPage = pRam->GCPhys + ((RTGCPHYS)iPage << GUEST_PAGE_SHIFT);
1953	void const *pvPage;
1954	int rc = pgmPhysPageMapReadOnly(pVM, pPage, GCPhysPage, &pvPage);
1955	if (RT_SUCCESS(rc))
1956	{
1957	uint32_t u32Checksum2 = RTCrc32(pvPage, GUEST_PAGE_SIZE);
1958	# if 0
1959	AssertMsg((u32Checksum2 & /UINT32_C(0x00000303)/ 0x3) == u32Checksum, ("GCPhysPage=%RGp\n", GCPhysPage));
1960	# else
1961	if ((u32Checksum2 & /UINT32_C(0x00000303)/ 0x3) == u32Checksum)
1962	LogFlow(("shpg %#x @ %RGp %#x [OK]\n", PGM_PAGE_GET_PAGEID(pPage), GCPhysPage, u32Checksum2));
1963	else
1964	AssertMsgFailed(("shpg %#x @ %RGp %#x\n", PGM_PAGE_GET_PAGEID(pPage), GCPhysPage, u32Checksum2));
1965	# endif
1966	}
1967	else
1968	AssertRC(rc);
1969	}
1970	}
1971
1972	} /* for each page */
1973
1974	} /* for each ram range */
1975	}
1976
1977	PGM_UNLOCK(pVM);
1978	#endif /* VBOX_STRICT */
1979	NOREF(pVM);
1980	}
1981
1982
1983	/**
1984	* Resets the physical memory state.
1985	*
1986	* ASSUMES that the caller owns the PGM lock.
1987	*
1988	* @returns VBox status code.
1989	* @param pVM The cross context VM structure.
1990	*/
1991	int pgmR3PhysRamReset(PVM pVM)
1992	{
1993	PGM_LOCK_ASSERT_OWNER(pVM);
1994
1995	/* Reset the memory balloon. */
1996	int rc = GMMR3BalloonedPages(pVM, GMMBALLOONACTION_RESET, 0);
1997	AssertRC(rc);
1998
1999	#ifdef VBOX_WITH_PAGE_SHARING
2000	/* Clear all registered shared modules. */
2001	pgmR3PhysAssertSharedPageChecksums(pVM);
2002	rc = GMMR3ResetSharedModules(pVM);
2003	AssertRC(rc);
2004	#endif
2005	/* Reset counters. */
2006	pVM->pgm.s.cReusedSharedPages = 0;
2007	pVM->pgm.s.cBalloonedPages = 0;
2008
2009	return VINF_SUCCESS;
2010	}
2011
2012
2013	/**
2014	* Resets (zeros) the RAM after all devices and components have been reset.
2015	*
2016	* ASSUMES that the caller owns the PGM lock.
2017	*
2018	* @returns VBox status code.
2019	* @param pVM The cross context VM structure.
2020	*/
2021	int pgmR3PhysRamZeroAll(PVM pVM)
2022	{
2023	PGM_LOCK_ASSERT_OWNER(pVM);
2024
2025	/*
2026	* We batch up pages that should be freed instead of calling GMM for
2027	* each and every one of them.
2028	*/
2029	uint32_t cPendingPages = 0;
2030	PGMMFREEPAGESREQ pReq;
2031	int rc = GMMR3FreePagesPrepare(pVM, &pReq, PGMPHYS_FREE_PAGE_BATCH_SIZE, GMMACCOUNT_BASE);
2032	AssertLogRelRCReturn(rc, rc);
2033
2034	/*
2035	* Walk the ram ranges.
2036	*/
2037	for (PPGMRAMRANGE pRam = pVM->pgm.s.pRamRangesXR3; pRam; pRam = pRam->pNextR3)
2038	{
2039	uint32_t iPage = pRam->cb >> GUEST_PAGE_SHIFT;
2040	AssertMsg(((RTGCPHYS)iPage << GUEST_PAGE_SHIFT) == pRam->cb, ("%RGp %RGp\n", (RTGCPHYS)iPage << GUEST_PAGE_SHIFT, pRam->cb));
2041
2042	if ( !pVM->pgm.s.fRamPreAlloc
2043	#ifdef VBOX_WITH_PGM_NEM_MODE
2044	&& !pVM->pgm.s.fNemMode
2045	#endif
2046	&& pVM->pgm.s.fZeroRamPagesOnReset)
2047	{
2048	/* Replace all RAM pages by ZERO pages. */
2049	while (iPage-- > 0)
2050	{
2051	PPGMPAGE pPage = &pRam->aPages[iPage];
2052	switch (PGM_PAGE_GET_TYPE(pPage))
2053	{
2054	case PGMPAGETYPE_RAM:
2055	/* Do not replace pages part of a 2 MB continuous range
2056	with zero pages, but zero them instead. */
2057	if ( PGM_PAGE_GET_PDE_TYPE(pPage) == PGM_PAGE_PDE_TYPE_PDE
2058	\|\| PGM_PAGE_GET_PDE_TYPE(pPage) == PGM_PAGE_PDE_TYPE_PDE_DISABLED)
2059	{
2060	void *pvPage;
2061	rc = pgmPhysPageMap(pVM, pPage, pRam->GCPhys + ((RTGCPHYS)iPage << GUEST_PAGE_SHIFT), &pvPage);
2062	AssertLogRelRCReturn(rc, rc);
2063	RT_BZERO(pvPage, GUEST_PAGE_SIZE);
2064	}
2065	else if (PGM_PAGE_IS_BALLOONED(pPage))
2066	{
2067	/* Turn into a zero page; the balloon status is lost when the VM reboots. */
2068	PGM_PAGE_SET_STATE(pVM, pPage, PGM_PAGE_STATE_ZERO);
2069	}
2070	else if (!PGM_PAGE_IS_ZERO(pPage))
2071	{
2072	rc = pgmPhysFreePage(pVM, pReq, &cPendingPages, pPage,
2073	pRam->GCPhys + ((RTGCPHYS)iPage << GUEST_PAGE_SHIFT), PGMPAGETYPE_RAM);
2074	AssertLogRelRCReturn(rc, rc);
2075	}
2076	break;
2077
2078	case PGMPAGETYPE_MMIO2_ALIAS_MMIO:
2079	case PGMPAGETYPE_SPECIAL_ALIAS_MMIO: /** @todo perhaps leave the special page alone? I don't think VT-x copes with this code. */
2080	pgmHandlerPhysicalResetAliasedPage(pVM, pPage, pRam->GCPhys + ((RTGCPHYS)iPage << GUEST_PAGE_SHIFT),
2081	pRam, true /fDoAccounting/, false /fFlushIemTlbs/);
2082	break;
2083
2084	case PGMPAGETYPE_MMIO2:
2085	case PGMPAGETYPE_ROM_SHADOW: /* handled by pgmR3PhysRomReset. */
2086	case PGMPAGETYPE_ROM:
2087	case PGMPAGETYPE_MMIO:
2088	break;
2089	default:
2090	AssertFailed();
2091	}
2092	} /* for each page */
2093	}
2094	else
2095	{
2096	/* Zero the memory. */
2097	while (iPage-- > 0)
2098	{
2099	PPGMPAGE pPage = &pRam->aPages[iPage];
2100	switch (PGM_PAGE_GET_TYPE(pPage))
2101	{
2102	case PGMPAGETYPE_RAM:
2103	switch (PGM_PAGE_GET_STATE(pPage))
2104	{
2105	case PGM_PAGE_STATE_ZERO:
2106	break;
2107
2108	case PGM_PAGE_STATE_BALLOONED:
2109	/* Turn into a zero page; the balloon status is lost when the VM reboots. */
2110	PGM_PAGE_SET_STATE(pVM, pPage, PGM_PAGE_STATE_ZERO);
2111	break;
2112
2113	case PGM_PAGE_STATE_SHARED:
2114	case PGM_PAGE_STATE_WRITE_MONITORED:
2115	rc = pgmPhysPageMakeWritable(pVM, pPage, pRam->GCPhys + ((RTGCPHYS)iPage << GUEST_PAGE_SHIFT));
2116	AssertLogRelRCReturn(rc, rc);
2117	RT_FALL_THRU();
2118
2119	case PGM_PAGE_STATE_ALLOCATED:
2120	if (pVM->pgm.s.fZeroRamPagesOnReset)
2121	{
2122	void *pvPage;
2123	rc = pgmPhysPageMap(pVM, pPage, pRam->GCPhys + ((RTGCPHYS)iPage << GUEST_PAGE_SHIFT), &pvPage);
2124	AssertLogRelRCReturn(rc, rc);
2125	RT_BZERO(pvPage, GUEST_PAGE_SIZE);
2126	}
2127	break;
2128	}
2129	break;
2130
2131	case PGMPAGETYPE_MMIO2_ALIAS_MMIO:
2132	case PGMPAGETYPE_SPECIAL_ALIAS_MMIO: /** @todo perhaps leave the special page alone? I don't think VT-x copes with this code. */
2133	pgmHandlerPhysicalResetAliasedPage(pVM, pPage, pRam->GCPhys + ((RTGCPHYS)iPage << GUEST_PAGE_SHIFT),
2134	pRam, true /fDoAccounting/, false /fFlushIemTlbs/);
2135	break;
2136
2137	case PGMPAGETYPE_MMIO2:
2138	case PGMPAGETYPE_ROM_SHADOW:
2139	case PGMPAGETYPE_ROM:
2140	case PGMPAGETYPE_MMIO:
2141	break;
2142	default:
2143	AssertFailed();
2144
2145	}
2146	} /* for each page */
2147	}
2148
2149	}
2150
2151	/*
2152	* Finish off any pages pending freeing.
2153	*/
2154	if (cPendingPages)
2155	{
2156	rc = GMMR3FreePagesPerform(pVM, pReq, cPendingPages);
2157	AssertLogRelRCReturn(rc, rc);
2158	}
2159	GMMR3FreePagesCleanup(pReq);
2160
2161	/*
2162	* Flush the IEM TLB, just to be sure it really is done.
2163	*/
2164	IEMTlbInvalidateAllPhysicalAllCpus(pVM, NIL_VMCPUID, IEMTLBPHYSFLUSHREASON_ZERO_ALL);
2165
2166	return VINF_SUCCESS;
2167	}
2168
2169
2170	/**
2171	* Frees all RAM during VM termination
2172	*
2173	* ASSUMES that the caller owns the PGM lock.
2174	*
2175	* @returns VBox status code.
2176	* @param pVM The cross context VM structure.
2177	*/
2178	int pgmR3PhysRamTerm(PVM pVM)
2179	{
2180	PGM_LOCK_ASSERT_OWNER(pVM);
2181
2182	/* Reset the memory balloon. */
2183	int rc = GMMR3BalloonedPages(pVM, GMMBALLOONACTION_RESET, 0);
2184	AssertRC(rc);
2185
2186	#ifdef VBOX_WITH_PAGE_SHARING
2187	/*
2188	* Clear all registered shared modules.
2189	*/
2190	pgmR3PhysAssertSharedPageChecksums(pVM);
2191	rc = GMMR3ResetSharedModules(pVM);
2192	AssertRC(rc);
2193
2194	/*
2195	* Flush the handy pages updates to make sure no shared pages are hiding
2196	* in there. (Not unlikely if the VM shuts down, apparently.)
2197	*/
2198	# ifdef VBOX_WITH_PGM_NEM_MODE
2199	if (!pVM->pgm.s.fNemMode)
2200	# endif
2201	rc = VMMR3CallR0(pVM, VMMR0_DO_PGM_FLUSH_HANDY_PAGES, 0, NULL);
2202	#endif
2203
2204	/*
2205	* We batch up pages that should be freed instead of calling GMM for
2206	* each and every one of them.
2207	*/
2208	uint32_t cPendingPages = 0;
2209	PGMMFREEPAGESREQ pReq;
2210	rc = GMMR3FreePagesPrepare(pVM, &pReq, PGMPHYS_FREE_PAGE_BATCH_SIZE, GMMACCOUNT_BASE);
2211	AssertLogRelRCReturn(rc, rc);
2212
2213	/*
2214	* Walk the ram ranges.
2215	*/
2216	for (PPGMRAMRANGE pRam = pVM->pgm.s.pRamRangesXR3; pRam; pRam = pRam->pNextR3)
2217	{
2218	uint32_t iPage = pRam->cb >> GUEST_PAGE_SHIFT;
2219	AssertMsg(((RTGCPHYS)iPage << GUEST_PAGE_SHIFT) == pRam->cb, ("%RGp %RGp\n", (RTGCPHYS)iPage << GUEST_PAGE_SHIFT, pRam->cb));
2220
2221	while (iPage-- > 0)
2222	{
2223	PPGMPAGE pPage = &pRam->aPages[iPage];
2224	switch (PGM_PAGE_GET_TYPE(pPage))
2225	{
2226	case PGMPAGETYPE_RAM:
2227	/* Free all shared pages. Private pages are automatically freed during GMM VM cleanup. */
2228	/** @todo change this to explicitly free private pages here. */
2229	if (PGM_PAGE_IS_SHARED(pPage))
2230	{
2231	rc = pgmPhysFreePage(pVM, pReq, &cPendingPages, pPage,
2232	pRam->GCPhys + ((RTGCPHYS)iPage << GUEST_PAGE_SHIFT), PGMPAGETYPE_RAM);
2233	AssertLogRelRCReturn(rc, rc);
2234	}
2235	break;
2236
2237	case PGMPAGETYPE_MMIO2_ALIAS_MMIO:
2238	case PGMPAGETYPE_SPECIAL_ALIAS_MMIO:
2239	case PGMPAGETYPE_MMIO2:
2240	case PGMPAGETYPE_ROM_SHADOW: /* handled by pgmR3PhysRomReset. */
2241	case PGMPAGETYPE_ROM:
2242	case PGMPAGETYPE_MMIO:
2243	break;
2244	default:
2245	AssertFailed();
2246	}
2247	} /* for each page */
2248	}
2249
2250	/*
2251	* Finish off any pages pending freeing.
2252	*/
2253	if (cPendingPages)
2254	{
2255	rc = GMMR3FreePagesPerform(pVM, pReq, cPendingPages);
2256	AssertLogRelRCReturn(rc, rc);
2257	}
2258	GMMR3FreePagesCleanup(pReq);
2259	return VINF_SUCCESS;
2260	}
2261
2262
2263
2264	/*********************************************************************************************************************************
2265	* MMIO *
2266	*********************************************************************************************************************************/
2267
2268	/**
2269	* This is the interface IOM is using to register an MMIO region.
2270	*
2271	* It will check for conflicts and ensure that a RAM range structure
2272	* is present before calling the PGMR3HandlerPhysicalRegister API to
2273	* register the callbacks.
2274	*
2275	* @returns VBox status code.
2276	*
2277	* @param pVM The cross context VM structure.
2278	* @param GCPhys The start of the MMIO region.
2279	* @param cb The size of the MMIO region.
2280	* @param hType The physical access handler type registration.
2281	* @param uUser The user argument.
2282	* @param pszDesc The description of the MMIO region.
2283	*/
2284	VMMR3DECL(int) PGMR3PhysMMIORegister(PVM pVM, RTGCPHYS GCPhys, RTGCPHYS cb, PGMPHYSHANDLERTYPE hType,
2285	uint64_t uUser, const char *pszDesc)
2286	{
2287	/*
2288	* Assert on some assumption.
2289	*/
2290	VM_ASSERT_EMT(pVM);
2291	AssertReturn(!(cb & GUEST_PAGE_OFFSET_MASK), VERR_INVALID_PARAMETER);
2292	AssertReturn(!(GCPhys & GUEST_PAGE_OFFSET_MASK), VERR_INVALID_PARAMETER);
2293	AssertPtrReturn(pszDesc, VERR_INVALID_POINTER);
2294	AssertReturn(*pszDesc, VERR_INVALID_PARAMETER);
2295	#ifdef VBOX_STRICT
2296	PCPGMPHYSHANDLERTYPEINT pType = pgmHandlerPhysicalTypeHandleToPtr(pVM, hType);
2297	Assert(pType);
2298	Assert(pType->enmKind == PGMPHYSHANDLERKIND_MMIO);
2299	#endif
2300
2301	int rc = PGM_LOCK(pVM);
2302	AssertRCReturn(rc, rc);
2303
2304	/*
2305	* Make sure there's a RAM range structure for the region.
2306	*/
2307	RTGCPHYS GCPhysLast = GCPhys + (cb - 1);
2308	bool fRamExists = false;
2309	PPGMRAMRANGE pRamPrev = NULL;
2310	PPGMRAMRANGE pRam = pVM->pgm.s.pRamRangesXR3;
2311	while (pRam && GCPhysLast >= pRam->GCPhys)
2312	{
2313	if ( GCPhysLast >= pRam->GCPhys
2314	&& GCPhys <= pRam->GCPhysLast)
2315	{
2316	/* Simplification: all within the same range. */
2317	AssertLogRelMsgReturnStmt( GCPhys >= pRam->GCPhys
2318	&& GCPhysLast <= pRam->GCPhysLast,
2319	("%RGp-%RGp (MMIO/%s) falls partly outside %RGp-%RGp (%s)\n",
2320	GCPhys, GCPhysLast, pszDesc,
2321	pRam->GCPhys, pRam->GCPhysLast, pRam->pszDesc),
2322	PGM_UNLOCK(pVM),
2323	VERR_PGM_RAM_CONFLICT);
2324
2325	/* Check that it's all RAM or MMIO pages. */
2326	PCPGMPAGE pPage = &pRam->aPages[(GCPhys - pRam->GCPhys) >> GUEST_PAGE_SHIFT];
2327	uint32_t cLeft = cb >> GUEST_PAGE_SHIFT;
2328	while (cLeft-- > 0)
2329	{
2330	AssertLogRelMsgReturnStmt( PGM_PAGE_GET_TYPE(pPage) == PGMPAGETYPE_RAM
2331	\|\| PGM_PAGE_GET_TYPE(pPage) == PGMPAGETYPE_MMIO,
2332	("%RGp-%RGp (MMIO/%s): %RGp is not a RAM or MMIO page - type=%d desc=%s\n",
2333	GCPhys, GCPhysLast, pszDesc, pRam->GCPhys, PGM_PAGE_GET_TYPE(pPage), pRam->pszDesc),
2334	PGM_UNLOCK(pVM),
2335	VERR_PGM_RAM_CONFLICT);
2336	pPage++;
2337	}
2338
2339	/* Looks good. */
2340	fRamExists = true;
2341	break;
2342	}
2343
2344	/* next */
2345	pRamPrev = pRam;
2346	pRam = pRam->pNextR3;
2347	}
2348	PPGMRAMRANGE pNew;
2349	if (fRamExists)
2350	{
2351	pNew = NULL;
2352
2353	/*
2354	* Make all the pages in the range MMIO/ZERO pages, freeing any
2355	* RAM pages currently mapped here. This might not be 100% correct
2356	* for PCI memory, but we're doing the same thing for MMIO2 pages.
2357	*/
2358	rc = pgmR3PhysFreePageRange(pVM, pRam, GCPhys, GCPhysLast, NULL);
2359	AssertRCReturnStmt(rc, PGM_UNLOCK(pVM), rc);
2360
2361	/* Force a PGM pool flush as guest ram references have been changed. */
2362	/** @todo not entirely SMP safe; assuming for now the guest takes
2363	* care of this internally (not touch mapped mmio while changing the
2364	* mapping). */
2365	PVMCPU pVCpu = VMMGetCpu(pVM);
2366	pVCpu->pgm.s.fSyncFlags \|= PGM_SYNC_CLEAR_PGM_POOL;
2367	VMCPU_FF_SET(pVCpu, VMCPU_FF_PGM_SYNC_CR3);
2368	}
2369	else
2370	{
2371	/*
2372	* No RAM range, insert an ad hoc one.
2373	*
2374	* Note that we don't have to tell REM about this range because
2375	* PGMHandlerPhysicalRegisterEx will do that for us.
2376	*/
2377	Log(("PGMR3PhysMMIORegister: Adding ad hoc MMIO range for %RGp-%RGp %s\n", GCPhys, GCPhysLast, pszDesc));
2378
2379	/* Alloc. */
2380	const uint32_t cPages = cb >> GUEST_PAGE_SHIFT;
2381	const size_t cbRamRange = RT_UOFFSETOF_DYN(PGMRAMRANGE, aPages[cPages]);
2382	const size_t cRangePages = RT_ALIGN_Z(cbRamRange, HOST_PAGE_SIZE) >> HOST_PAGE_SHIFT;
2383	RTR0PTR pNewR0 = NIL_RTR0PTR;
2384	rc = SUPR3PageAllocEx(cRangePages, 0 /fFlags/, (void *)&pNew, &pNewR0, NULL /paPages*/);
2385	AssertLogRelMsgRCReturnStmt(rc, ("cbRamRange=%zu\n", cbRamRange), PGM_UNLOCK(pVM), rc);
2386
2387	#ifdef VBOX_WITH_NATIVE_NEM
2388	/* Notify NEM. */
2389	uint8_t u2State = 0; /* (must have valid state as there can't be anything to preserve) */
2390	if (VM_IS_NEM_ENABLED(pVM))
2391	{
2392	rc = NEMR3NotifyPhysMmioExMapEarly(pVM, GCPhys, cPages << GUEST_PAGE_SHIFT, 0 /fFlags/, NULL, NULL,
2393	&u2State, &pNew->uNemRange);
2394	AssertLogRelRCReturnStmt(rc, SUPR3PageFreeEx(pNew, cRangePages), rc);
2395	}
2396	#endif
2397
2398	/* Initialize the range. */
2399	pNew->pSelfR0 = pNewR0;
2400	pNew->GCPhys = GCPhys;
2401	pNew->GCPhysLast = GCPhysLast;
2402	pNew->cb = cb;
2403	pNew->pszDesc = pszDesc;
2404	pNew->fFlags = PGM_RAM_RANGE_FLAGS_AD_HOC_MMIO;
2405	pNew->pvR3 = NULL;
2406	pNew->paLSPages = NULL;
2407
2408	uint32_t iPage = cPages;
2409	while (iPage-- > 0)
2410	{
2411	PGM_PAGE_INIT_ZERO(&pNew->aPages[iPage], pVM, PGMPAGETYPE_MMIO);
2412	#ifdef VBOX_WITH_NATIVE_NEM
2413	PGM_PAGE_SET_NEM_STATE(&pNew->aPages[iPage], u2State);
2414	#endif
2415	}
2416	Assert(PGM_PAGE_GET_TYPE(&pNew->aPages[0]) == PGMPAGETYPE_MMIO);
2417
2418	/* update the page count stats. */
2419	pVM->pgm.s.cPureMmioPages += cPages;
2420	pVM->pgm.s.cAllPages += cPages;
2421
2422	/* link it */
2423	pgmR3PhysLinkRamRange(pVM, pNew, pRamPrev);
2424	}
2425
2426	/*
2427	* Register the access handler.
2428	*/
2429	rc = PGMHandlerPhysicalRegister(pVM, GCPhys, GCPhysLast, hType, uUser, pszDesc);
2430	if (RT_SUCCESS(rc))
2431	{
2432	#ifdef VBOX_WITH_NATIVE_NEM
2433	/* Late NEM notification. */
2434	if (VM_IS_NEM_ENABLED(pVM))
2435	{
2436	uint32_t const fNemNotify = (fRamExists ? NEM_NOTIFY_PHYS_MMIO_EX_F_REPLACE : 0);
2437	rc = NEMR3NotifyPhysMmioExMapLate(pVM, GCPhys, GCPhysLast - GCPhys + 1, fNemNotify,
2438	fRamExists ? (uint8_t *)pRam->pvR3 + (uintptr_t)(GCPhys - pRam->GCPhys) : NULL,
2439	NULL, !fRamExists ? &pRam->uNemRange : NULL);
2440	AssertLogRelRCReturn(rc, rc);
2441	}
2442	#endif
2443	}
2444	/** @todo the phys handler failure handling isn't complete, esp. wrt NEM. */
2445	else if (!fRamExists)
2446	{
2447	pVM->pgm.s.cPureMmioPages -= cb >> GUEST_PAGE_SHIFT;
2448	pVM->pgm.s.cAllPages -= cb >> GUEST_PAGE_SHIFT;
2449
2450	/* remove the ad hoc range. */
2451	pgmR3PhysUnlinkRamRange2(pVM, pNew, pRamPrev);
2452	pNew->cb = pNew->GCPhys = pNew->GCPhysLast = NIL_RTGCPHYS;
2453	SUPR3PageFreeEx(pRam, RT_ALIGN_Z(RT_UOFFSETOF_DYN(PGMRAMRANGE, aPages[cb >> GUEST_PAGE_SHIFT]),
2454	HOST_PAGE_SIZE) >> HOST_PAGE_SHIFT);
2455	}
2456	pgmPhysInvalidatePageMapTLB(pVM);
2457
2458	PGM_UNLOCK(pVM);
2459	return rc;
2460	}
2461
2462
2463	/**
2464	* This is the interface IOM is using to register an MMIO region.
2465	*
2466	* It will take care of calling PGMHandlerPhysicalDeregister and clean up
2467	* any ad hoc PGMRAMRANGE left behind.
2468	*
2469	* @returns VBox status code.
2470	* @param pVM The cross context VM structure.
2471	* @param GCPhys The start of the MMIO region.
2472	* @param cb The size of the MMIO region.
2473	*/
2474	VMMR3DECL(int) PGMR3PhysMMIODeregister(PVM pVM, RTGCPHYS GCPhys, RTGCPHYS cb)
2475	{
2476	VM_ASSERT_EMT(pVM);
2477
2478	int rc = PGM_LOCK(pVM);
2479	AssertRCReturn(rc, rc);
2480
2481	/*
2482	* First deregister the handler, then check if we should remove the ram range.
2483	*/
2484	rc = PGMHandlerPhysicalDeregister(pVM, GCPhys);
2485	if (RT_SUCCESS(rc))
2486	{
2487	RTGCPHYS GCPhysLast = GCPhys + (cb - 1);
2488	PPGMRAMRANGE pRamPrev = NULL;
2489	PPGMRAMRANGE pRam = pVM->pgm.s.pRamRangesXR3;
2490	while (pRam && GCPhysLast >= pRam->GCPhys)
2491	{
2492	/** @todo We're being a bit too careful here. rewrite. */
2493	if ( GCPhysLast == pRam->GCPhysLast
2494	&& GCPhys == pRam->GCPhys)
2495	{
2496	Assert(pRam->cb == cb);
2497
2498	/*
2499	* See if all the pages are dead MMIO pages.
2500	*/
2501	uint32_t const cGuestPages = cb >> GUEST_PAGE_SHIFT;
2502	bool fAllMMIO = true;
2503	uint32_t iPage = 0;
2504	uint32_t cLeft = cGuestPages;
2505	while (cLeft-- > 0)
2506	{
2507	PPGMPAGE pPage = &pRam->aPages[iPage];
2508	if ( !PGM_PAGE_IS_MMIO_OR_ALIAS(pPage)
2509	/\|\| not-out-of-action later /)
2510	{
2511	fAllMMIO = false;
2512	AssertMsgFailed(("%RGp %R[pgmpage]\n", pRam->GCPhys + ((RTGCPHYS)iPage << GUEST_PAGE_SHIFT), pPage));
2513	break;
2514	}
2515	Assert( PGM_PAGE_IS_ZERO(pPage)
2516	\|\| PGM_PAGE_GET_TYPE(pPage) == PGMPAGETYPE_MMIO2_ALIAS_MMIO
2517	\|\| PGM_PAGE_GET_TYPE(pPage) == PGMPAGETYPE_SPECIAL_ALIAS_MMIO);
2518	iPage++;
2519	}
2520	if (fAllMMIO)
2521	{
2522	/*
2523	* Ad-hoc range, unlink and free it.
2524	*/
2525	Log(("PGMR3PhysMMIODeregister: Freeing ad hoc MMIO range for %RGp-%RGp %s\n",
2526	GCPhys, GCPhysLast, pRam->pszDesc));
2527	/** @todo check the ad-hoc flags? */
2528
2529	#ifdef VBOX_WITH_NATIVE_NEM
2530	if (VM_IS_NEM_ENABLED(pVM)) /* Notify REM before we unlink the range. */
2531	{
2532	rc = NEMR3NotifyPhysMmioExUnmap(pVM, GCPhys, GCPhysLast - GCPhys + 1, 0 /fFlags/,
2533	NULL, NULL, NULL, &pRam->uNemRange);
2534	AssertLogRelRCReturn(rc, rc);
2535	}
2536	#endif
2537
2538	pVM->pgm.s.cAllPages -= cGuestPages;
2539	pVM->pgm.s.cPureMmioPages -= cGuestPages;
2540
2541	pgmR3PhysUnlinkRamRange2(pVM, pRam, pRamPrev);
2542	const uint32_t cPages = pRam->cb >> GUEST_PAGE_SHIFT;
2543	const size_t cbRamRange = RT_UOFFSETOF_DYN(PGMRAMRANGE, aPages[cPages]);
2544	pRam->cb = pRam->GCPhys = pRam->GCPhysLast = NIL_RTGCPHYS;
2545	SUPR3PageFreeEx(pRam, RT_ALIGN_Z(cbRamRange, HOST_PAGE_SIZE) >> HOST_PAGE_SHIFT);
2546	break;
2547	}
2548	}
2549
2550	/*
2551	* Range match? It will all be within one range (see PGMAllHandler.cpp).
2552	*/
2553	if ( GCPhysLast >= pRam->GCPhys
2554	&& GCPhys <= pRam->GCPhysLast)
2555	{
2556	Assert(GCPhys >= pRam->GCPhys);
2557	Assert(GCPhysLast <= pRam->GCPhysLast);
2558
2559	/*
2560	* Turn the pages back into RAM pages.
2561	*/
2562	uint32_t iPage = (GCPhys - pRam->GCPhys) >> GUEST_PAGE_SHIFT;
2563	uint32_t cLeft = cb >> GUEST_PAGE_SHIFT;
2564	while (cLeft--)
2565	{
2566	PPGMPAGE pPage = &pRam->aPages[iPage];
2567	AssertMsg( (PGM_PAGE_IS_MMIO(pPage) && PGM_PAGE_IS_ZERO(pPage))
2568	\|\| PGM_PAGE_GET_TYPE(pPage) == PGMPAGETYPE_MMIO2_ALIAS_MMIO
2569	\|\| PGM_PAGE_GET_TYPE(pPage) == PGMPAGETYPE_SPECIAL_ALIAS_MMIO,
2570	("%RGp %R[pgmpage]\n", pRam->GCPhys + ((RTGCPHYS)iPage << GUEST_PAGE_SHIFT), pPage));
2571	if (PGM_PAGE_IS_MMIO_OR_ALIAS(pPage))
2572	PGM_PAGE_SET_TYPE(pVM, pPage, PGMPAGETYPE_RAM);
2573	iPage++;
2574	}
2575
2576	#ifdef VBOX_WITH_NATIVE_NEM
2577	/* Notify REM (failure will probably leave things in a non-working state). */
2578	if (VM_IS_NEM_ENABLED(pVM))
2579	{
2580	uint8_t u2State = UINT8_MAX;
2581	rc = NEMR3NotifyPhysMmioExUnmap(pVM, GCPhys, GCPhysLast - GCPhys + 1, NEM_NOTIFY_PHYS_MMIO_EX_F_REPLACE,
2582	pRam->pvR3 ? (uint8_t *)pRam->pvR3 + GCPhys - pRam->GCPhys : NULL,
2583	NULL, &u2State, &pRam->uNemRange);
2584	AssertLogRelRCReturn(rc, rc);
2585	if (u2State != UINT8_MAX)
2586	pgmPhysSetNemStateForPages(&pRam->aPages[(GCPhys - pRam->GCPhys) >> GUEST_PAGE_SHIFT],
2587	cb >> GUEST_PAGE_SHIFT, u2State);
2588	}
2589	#endif
2590	break;
2591	}
2592
2593	/* next */
2594	pRamPrev = pRam;
2595	pRam = pRam->pNextR3;
2596	}
2597	}
2598
2599	/* Force a PGM pool flush as guest ram references have been changed. */
2600	/** @todo Not entirely SMP safe; assuming for now the guest takes care of
2601	* this internally (not touch mapped mmio while changing the mapping). */
2602	PVMCPU pVCpu = VMMGetCpu(pVM);
2603	pVCpu->pgm.s.fSyncFlags \|= PGM_SYNC_CLEAR_PGM_POOL;
2604	VMCPU_FF_SET(pVCpu, VMCPU_FF_PGM_SYNC_CR3);
2605
2606	pgmPhysInvalidatePageMapTLB(pVM);
2607	pgmPhysInvalidRamRangeTlbs(pVM);
2608	PGM_UNLOCK(pVM);
2609	return rc;
2610	}
2611
2612
2613
2614	/*********************************************************************************************************************************
2615	* MMIO2 *
2616	*********************************************************************************************************************************/
2617
2618	/**
2619	* Locate a MMIO2 range.
2620	*
2621	* @returns Pointer to the MMIO2 range.
2622	* @param pVM The cross context VM structure.
2623	* @param pDevIns The device instance owning the region.
2624	* @param iSubDev The sub-device number.
2625	* @param iRegion The region.
2626	* @param hMmio2 Handle to look up. If NIL, use the @a iSubDev and
2627	* @a iRegion.
2628	*/
2629	DECLINLINE(PPGMREGMMIO2RANGE) pgmR3PhysMmio2Find(PVM pVM, PPDMDEVINS pDevIns, uint32_t iSubDev,
2630	uint32_t iRegion, PGMMMIO2HANDLE hMmio2)
2631	{
2632	if (hMmio2 != NIL_PGMMMIO2HANDLE)
2633	{
2634	if (hMmio2 <= RT_ELEMENTS(pVM->pgm.s.apMmio2RangesR3) && hMmio2 != 0)
2635	{
2636	PPGMREGMMIO2RANGE pCur = pVM->pgm.s.apMmio2RangesR3[hMmio2 - 1];
2637	if (pCur && pCur->pDevInsR3 == pDevIns)
2638	{
2639	Assert(pCur->idMmio2 == hMmio2);
2640	AssertReturn(pCur->fFlags & PGMREGMMIO2RANGE_F_FIRST_CHUNK, NULL);
2641	return pCur;
2642	}
2643	Assert(!pCur);
2644	}
2645	for (PPGMREGMMIO2RANGE pCur = pVM->pgm.s.pRegMmioRangesR3; pCur; pCur = pCur->pNextR3)
2646	if (pCur->idMmio2 == hMmio2)
2647	{
2648	AssertBreak(pCur->pDevInsR3 == pDevIns);
2649	AssertReturn(pCur->fFlags & PGMREGMMIO2RANGE_F_FIRST_CHUNK, NULL);
2650	return pCur;
2651	}
2652	}
2653	else
2654	{
2655	/*
2656	* Search the list. There shouldn't be many entries.
2657	*/
2658	/** @todo Optimize this lookup! There may now be many entries and it'll
2659	* become really slow when doing MMR3HyperMapMMIO2 and similar. */
2660	for (PPGMREGMMIO2RANGE pCur = pVM->pgm.s.pRegMmioRangesR3; pCur; pCur = pCur->pNextR3)
2661	if ( pCur->pDevInsR3 == pDevIns
2662	&& pCur->iRegion == iRegion
2663	&& pCur->iSubDev == iSubDev)
2664	return pCur;
2665	}
2666	return NULL;
2667	}
2668
2669
2670	/**
2671	* Worker for PGMR3PhysMmio2ControlDirtyPageTracking and PGMR3PhysMmio2Map.
2672	*/
2673	static int pgmR3PhysMmio2EnableDirtyPageTracing(PVM pVM, PPGMREGMMIO2RANGE pFirstMmio2)
2674	{
2675	int rc = VINF_SUCCESS;
2676	for (PPGMREGMMIO2RANGE pCurMmio2 = pFirstMmio2; pCurMmio2; pCurMmio2 = pCurMmio2->pNextR3)
2677	{
2678	Assert(!(pCurMmio2->fFlags & PGMREGMMIO2RANGE_F_IS_TRACKING));
2679	int rc2 = pgmHandlerPhysicalExRegister(pVM, pCurMmio2->pPhysHandlerR3, pCurMmio2->RamRange.GCPhys,
2680	pCurMmio2->RamRange.GCPhysLast);
2681	AssertLogRelMsgRC(rc2, ("%#RGp-%#RGp %s failed -> %Rrc\n", pCurMmio2->RamRange.GCPhys, pCurMmio2->RamRange.GCPhysLast,
2682	pCurMmio2->RamRange.pszDesc, rc2));
2683	if (RT_SUCCESS(rc2))
2684	pCurMmio2->fFlags \|= PGMREGMMIO2RANGE_F_IS_TRACKING;
2685	else if (RT_SUCCESS(rc))
2686	rc = rc2;
2687	if (pCurMmio2->fFlags & PGMREGMMIO2RANGE_F_LAST_CHUNK)
2688	return rc;
2689	}
2690	AssertFailed();
2691	return rc;
2692	}
2693
2694
2695	/**
2696	* Worker for PGMR3PhysMmio2ControlDirtyPageTracking and PGMR3PhysMmio2Unmap.
2697	*/
2698	static int pgmR3PhysMmio2DisableDirtyPageTracing(PVM pVM, PPGMREGMMIO2RANGE pFirstMmio2)
2699	{
2700	for (PPGMREGMMIO2RANGE pCurMmio2 = pFirstMmio2; pCurMmio2; pCurMmio2 = pCurMmio2->pNextR3)
2701	{
2702	if (pCurMmio2->fFlags & PGMREGMMIO2RANGE_F_IS_TRACKING)
2703	{
2704	int rc2 = pgmHandlerPhysicalExDeregister(pVM, pCurMmio2->pPhysHandlerR3);
2705	AssertLogRelMsgRC(rc2, ("%#RGp-%#RGp %s failed -> %Rrc\n", pCurMmio2->RamRange.GCPhys, pCurMmio2->RamRange.GCPhysLast,
2706	pCurMmio2->RamRange.pszDesc, rc2));
2707	pCurMmio2->fFlags &= ~PGMREGMMIO2RANGE_F_IS_TRACKING;
2708	}
2709	if (pCurMmio2->fFlags & PGMREGMMIO2RANGE_F_LAST_CHUNK)
2710	return VINF_SUCCESS;
2711	}
2712	AssertFailed();
2713	return VINF_SUCCESS;
2714
2715	}
2716
2717
2718	/**
2719	* Calculates the number of chunks
2720	*
2721	* @returns Number of registration chunk needed.
2722	* @param pVM The cross context VM structure.
2723	* @param cb The size of the MMIO/MMIO2 range.
2724	* @param pcPagesPerChunk Where to return the number of pages tracked by each
2725	* chunk. Optional.
2726	* @param pcbChunk Where to return the guest mapping size for a chunk.
2727	*/
2728	static uint16_t pgmR3PhysMmio2CalcChunkCount(PVM pVM, RTGCPHYS cb, uint32_t pcPagesPerChunk, uint32_t pcbChunk)
2729	{
2730	RT_NOREF_PV(pVM); /* without raw mode */
2731
2732	/*
2733	* This is the same calculation as PGMR3PhysRegisterRam does, except we'll be
2734	* needing a few bytes extra the PGMREGMMIO2RANGE structure.
2735	*
2736	* Note! In additions, we've got a 24 bit sub-page range for MMIO2 ranges, leaving
2737	* us with an absolute maximum of 16777215 pages per chunk (close to 64 GB).
2738	*/
2739	uint32_t const cPagesPerChunk = _4M;
2740	Assert(RT_ALIGN_32(cPagesPerChunk, X86_PD_PAE_SHIFT - X86_PAGE_SHIFT)); /* NEM large page requirement: 1GB pages. */
2741	uint32_t const cbChunk = RT_UOFFSETOF_DYN(PGMREGMMIO2RANGE, RamRange.aPages[cPagesPerChunk]);
2742	AssertRelease(cPagesPerChunk < _16M);
2743
2744	if (pcbChunk)
2745	*pcbChunk = cbChunk;
2746	if (pcPagesPerChunk)
2747	*pcPagesPerChunk = cPagesPerChunk;
2748
2749	/* Calc the number of chunks we need. */
2750	RTGCPHYS const cGuestPages = cb >> GUEST_PAGE_SHIFT;
2751	uint16_t cChunks = (uint16_t)((cGuestPages + cPagesPerChunk - 1) / cPagesPerChunk);
2752	AssertRelease((RTGCPHYS)cChunks * cPagesPerChunk >= cGuestPages);
2753	return cChunks;
2754	}
2755
2756
2757	/**
2758	* Worker for PGMR3PhysMMIO2Register that allocates and the PGMREGMMIO2RANGE
2759	* structures and does basic initialization.
2760	*
2761	* Caller must set type specfic members and initialize the PGMPAGE structures.
2762	*
2763	* This was previously also used by PGMR3PhysMmio2PreRegister, a function for
2764	* pre-registering MMIO that was later (6.1) replaced by a new handle based IOM
2765	* interface. The reference to caller and type above is purely historical.
2766	*
2767	* @returns VBox status code.
2768	* @param pVM The cross context VM structure.
2769	* @param pDevIns The device instance owning the region.
2770	* @param iSubDev The sub-device number (internal PCI config number).
2771	* @param iRegion The region number. If the MMIO2 memory is a PCI
2772	* I/O region this number has to be the number of that
2773	* region. Otherwise it can be any number safe
2774	* UINT8_MAX.
2775	* @param cb The size of the region. Must be page aligned.
2776	* @param fFlags PGMPHYS_MMIO2_FLAGS_XXX.
2777	* @param idMmio2 The MMIO2 ID for the first chunk.
2778	* @param pszDesc The description.
2779	* @param ppHeadRet Where to return the pointer to the first
2780	* registration chunk.
2781	*
2782	* @thread EMT
2783	*/
2784	static int pgmR3PhysMmio2Create(PVM pVM, PPDMDEVINS pDevIns, uint32_t iSubDev, uint32_t iRegion, RTGCPHYS cb, uint32_t fFlags,
2785	uint8_t idMmio2, const char pszDesc, PPGMREGMMIO2RANGE ppHeadRet)
2786	{
2787	/*
2788	* Figure out how many chunks we need and of which size.
2789	*/
2790	uint32_t cPagesPerChunk;
2791	uint16_t cChunks = pgmR3PhysMmio2CalcChunkCount(pVM, cb, &cPagesPerChunk, NULL);
2792	AssertReturn(cChunks, VERR_PGM_PHYS_MMIO_EX_IPE);
2793
2794	/*
2795	* Allocate the chunks.
2796	*/
2797	PPGMREGMMIO2RANGE *ppNext = ppHeadRet;
2798	*ppNext = NULL;
2799
2800	int rc = VINF_SUCCESS;
2801	uint32_t cPagesLeft = cb >> GUEST_PAGE_SHIFT;
2802	for (uint16_t iChunk = 0; iChunk < cChunks && RT_SUCCESS(rc); iChunk++, idMmio2++)
2803	{
2804	/*
2805	* We currently do a single RAM range for the whole thing. This will
2806	* probably have to change once someone needs really large MMIO regions,
2807	* as we will be running into SUPR3PageAllocEx limitations and such.
2808	*/
2809	const uint32_t cPagesTrackedByChunk = RT_MIN(cPagesLeft, cPagesPerChunk);
2810	const size_t cbRange = RT_UOFFSETOF_DYN(PGMREGMMIO2RANGE, RamRange.aPages[cPagesTrackedByChunk]);
2811	PPGMREGMMIO2RANGE pNew = NULL;
2812
2813	/*
2814	* Allocate memory for the registration structure.
2815	*/
2816	size_t const cChunkPages = RT_ALIGN_Z(cbRange, HOST_PAGE_SIZE) >> HOST_PAGE_SHIFT;
2817	size_t const cbChunk = (1 + cChunkPages + 1) << HOST_PAGE_SHIFT;
2818	AssertLogRelBreakStmt(cbChunk == (uint32_t)cbChunk, rc = VERR_OUT_OF_RANGE);
2819	RTR0PTR R0PtrChunk = NIL_RTR0PTR;
2820	void *pvChunk = NULL;
2821	rc = SUPR3PageAllocEx(cChunkPages, 0 /fFlags/, &pvChunk, &R0PtrChunk, NULL /paPages/);
2822	AssertLogRelMsgRCBreak(rc, ("rc=%Rrc, cChunkPages=%#zx\n", rc, cChunkPages));
2823
2824	Assert(R0PtrChunk != NIL_RTR0PTR \|\| PGM_IS_IN_NEM_MODE(pVM));
2825	RT_BZERO(pvChunk, cChunkPages << HOST_PAGE_SHIFT);
2826
2827	pNew = (PPGMREGMMIO2RANGE)pvChunk;
2828	pNew->RamRange.fFlags = PGM_RAM_RANGE_FLAGS_FLOATING;
2829	pNew->RamRange.pSelfR0 = R0PtrChunk + RT_UOFFSETOF(PGMREGMMIO2RANGE, RamRange);
2830
2831	/*
2832	* Initialize the registration structure (caller does specific bits).
2833	*/
2834	pNew->pDevInsR3 = pDevIns;
2835	//pNew->pvR3 = NULL;
2836	//pNew->pNext = NULL;
2837	if (iChunk == 0)
2838	pNew->fFlags \|= PGMREGMMIO2RANGE_F_FIRST_CHUNK;
2839	if (iChunk + 1 == cChunks)
2840	pNew->fFlags \|= PGMREGMMIO2RANGE_F_LAST_CHUNK;
2841	if (fFlags & PGMPHYS_MMIO2_FLAGS_TRACK_DIRTY_PAGES)
2842	pNew->fFlags \|= PGMREGMMIO2RANGE_F_TRACK_DIRTY_PAGES;
2843	pNew->iSubDev = iSubDev;
2844	pNew->iRegion = iRegion;
2845	pNew->idSavedState = UINT8_MAX;
2846	pNew->idMmio2 = idMmio2;
2847	//pNew->pPhysHandlerR3 = NULL;
2848	//pNew->paLSPages = NULL;
2849	pNew->RamRange.GCPhys = NIL_RTGCPHYS;
2850	pNew->RamRange.GCPhysLast = NIL_RTGCPHYS;
2851	pNew->RamRange.pszDesc = pszDesc;
2852	pNew->RamRange.cb = pNew->cbReal = (RTGCPHYS)cPagesTrackedByChunk << X86_PAGE_SHIFT;
2853	pNew->RamRange.fFlags \|= PGM_RAM_RANGE_FLAGS_AD_HOC_MMIO_EX;
2854	pNew->RamRange.uNemRange = UINT32_MAX;
2855	//pNew->RamRange.pvR3 = NULL;
2856	//pNew->RamRange.paLSPages = NULL;
2857
2858	*ppNext = pNew;
2859	ASMCompilerBarrier();
2860	cPagesLeft -= cPagesTrackedByChunk;
2861	ppNext = &pNew->pNextR3;
2862
2863	/*
2864	* Pre-allocate a handler if we're tracking dirty pages, unless NEM takes care of this.
2865	*/
2866	if ( (fFlags & PGMPHYS_MMIO2_FLAGS_TRACK_DIRTY_PAGES)
2867	#ifdef VBOX_WITH_PGM_NEM_MODE
2868	&& (!VM_IS_NEM_ENABLED(pVM) \|\| !NEMR3IsMmio2DirtyPageTrackingSupported(pVM))
2869	#endif
2870	)
2871
2872	{
2873	rc = pgmHandlerPhysicalExCreate(pVM, pVM->pgm.s.hMmio2DirtyPhysHandlerType, idMmio2, pszDesc, &pNew->pPhysHandlerR3);
2874	AssertLogRelMsgRCBreak(rc, ("idMmio2=%zu\n", idMmio2));
2875	}
2876	}
2877	Assert(cPagesLeft == 0);
2878
2879	if (RT_SUCCESS(rc))
2880	{
2881	Assert((*ppHeadRet)->fFlags & PGMREGMMIO2RANGE_F_FIRST_CHUNK);
2882	return VINF_SUCCESS;
2883	}
2884
2885	/*
2886	* Free floating ranges.
2887	*/
2888	while (*ppHeadRet)
2889	{
2890	PPGMREGMMIO2RANGE pFree = *ppHeadRet;
2891	*ppHeadRet = pFree->pNextR3;
2892
2893	if (pFree->pPhysHandlerR3)
2894	{
2895	pgmHandlerPhysicalExDestroy(pVM, pFree->pPhysHandlerR3);
2896	pFree->pPhysHandlerR3 = NULL;
2897	}
2898
2899	if (pFree->RamRange.fFlags & PGM_RAM_RANGE_FLAGS_FLOATING)
2900	{
2901	const size_t cbRange = RT_UOFFSETOF_DYN(PGMREGMMIO2RANGE,
2902	RamRange.aPages[pFree->RamRange.cb >> X86_PAGE_SHIFT]);
2903	size_t const cChunkPages = RT_ALIGN_Z(cbRange, HOST_PAGE_SIZE) >> HOST_PAGE_SHIFT;
2904	SUPR3PageFreeEx(pFree, cChunkPages);
2905	}
2906	}
2907
2908	return rc;
2909	}
2910
2911
2912	/**
2913	* Common worker PGMR3PhysMmio2PreRegister & PGMR3PhysMMIO2Register that links a
2914	* complete registration entry into the lists and lookup tables.
2915	*
2916	* @param pVM The cross context VM structure.
2917	* @param pNew The new MMIO / MMIO2 registration to link.
2918	*/
2919	static void pgmR3PhysMmio2Link(PVM pVM, PPGMREGMMIO2RANGE pNew)
2920	{
2921	Assert(pNew->idMmio2 != UINT8_MAX);
2922
2923	/*
2924	* Link it into the list (order doesn't matter, so insert it at the head).
2925	*
2926	* Note! The range we're linking may consist of multiple chunks, so we
2927	* have to find the last one.
2928	*/
2929	PPGMREGMMIO2RANGE pLast = pNew;
2930	for (pLast = pNew; ; pLast = pLast->pNextR3)
2931	{
2932	if (pLast->fFlags & PGMREGMMIO2RANGE_F_LAST_CHUNK)
2933	break;
2934	Assert(pLast->pNextR3);
2935	Assert(pLast->pNextR3->pDevInsR3 == pNew->pDevInsR3);
2936	Assert(pLast->pNextR3->iSubDev == pNew->iSubDev);
2937	Assert(pLast->pNextR3->iRegion == pNew->iRegion);
2938	Assert(pLast->pNextR3->idMmio2 == pLast->idMmio2 + 1);
2939	}
2940
2941	PGM_LOCK_VOID(pVM);
2942
2943	/* Link in the chain of ranges at the head of the list. */
2944	pLast->pNextR3 = pVM->pgm.s.pRegMmioRangesR3;
2945	pVM->pgm.s.pRegMmioRangesR3 = pNew;
2946
2947	/* Insert the MMIO2 range/page IDs. */
2948	uint8_t idMmio2 = pNew->idMmio2;
2949	for (;;)
2950	{
2951	Assert(pVM->pgm.s.apMmio2RangesR3[idMmio2 - 1] == NULL);
2952	Assert(pVM->pgm.s.apMmio2RangesR0[idMmio2 - 1] == NIL_RTR0PTR);
2953	pVM->pgm.s.apMmio2RangesR3[idMmio2 - 1] = pNew;
2954	pVM->pgm.s.apMmio2RangesR0[idMmio2 - 1] = pNew->RamRange.pSelfR0 - RT_UOFFSETOF(PGMREGMMIO2RANGE, RamRange);
2955	if (pNew->fFlags & PGMREGMMIO2RANGE_F_LAST_CHUNK)
2956	break;
2957	pNew = pNew->pNextR3;
2958	idMmio2++;
2959	}
2960
2961	pgmPhysInvalidatePageMapTLB(pVM);
2962	PGM_UNLOCK(pVM);
2963	}
2964
2965
2966	/**
2967	* Allocate and register an MMIO2 region.
2968	*
2969	* As mentioned elsewhere, MMIO2 is just RAM spelled differently. It's RAM
2970	* associated with a device. It is also non-shared memory with a permanent
2971	* ring-3 mapping and page backing (presently).
2972	*
2973	* A MMIO2 range may overlap with base memory if a lot of RAM is configured for
2974	* the VM, in which case we'll drop the base memory pages. Presently we will
2975	* make no attempt to preserve anything that happens to be present in the base
2976	* memory that is replaced, this is of course incorrect but it's too much
2977	* effort.
2978	*
2979	* @returns VBox status code.
2980	* @retval VINF_SUCCESS on success, *ppv pointing to the R3 mapping of the
2981	* memory.
2982	* @retval VERR_ALREADY_EXISTS if the region already exists.
2983	*
2984	* @param pVM The cross context VM structure.
2985	* @param pDevIns The device instance owning the region.
2986	* @param iSubDev The sub-device number.
2987	* @param iRegion The region number. If the MMIO2 memory is a PCI
2988	* I/O region this number has to be the number of that
2989	* region. Otherwise it can be any number save
2990	* UINT8_MAX.
2991	* @param cb The size of the region. Must be page aligned.
2992	* @param fFlags Reserved for future use, must be zero.
2993	* @param pszDesc The description.
2994	* @param ppv Where to store the pointer to the ring-3 mapping of
2995	* the memory.
2996	* @param phRegion Where to return the MMIO2 region handle. Optional.
2997	* @thread EMT
2998	*/
2999	VMMR3_INT_DECL(int) PGMR3PhysMmio2Register(PVM pVM, PPDMDEVINS pDevIns, uint32_t iSubDev, uint32_t iRegion, RTGCPHYS cb,
3000	uint32_t fFlags, const char pszDesc, void ppv, PGMMMIO2HANDLE phRegion)
3001	{
3002	/*
3003	* Validate input.
3004	*/
3005	AssertPtrReturn(ppv, VERR_INVALID_POINTER);
3006	*ppv = NULL;
3007	if (phRegion)
3008	{
3009	AssertPtrReturn(phRegion, VERR_INVALID_POINTER);
3010	*phRegion = NIL_PGMMMIO2HANDLE;
3011	}
3012	VM_ASSERT_EMT_RETURN(pVM, VERR_VM_THREAD_NOT_EMT);
3013	AssertPtrReturn(pDevIns, VERR_INVALID_PARAMETER);
3014	AssertReturn(iSubDev <= UINT8_MAX, VERR_INVALID_PARAMETER);
3015	AssertReturn(iRegion <= UINT8_MAX, VERR_INVALID_PARAMETER);
3016	AssertPtrReturn(pszDesc, VERR_INVALID_POINTER);
3017	AssertReturn(*pszDesc, VERR_INVALID_PARAMETER);
3018	AssertReturn(pgmR3PhysMmio2Find(pVM, pDevIns, iSubDev, iRegion, NIL_PGMMMIO2HANDLE) == NULL, VERR_ALREADY_EXISTS);
3019	AssertReturn(!(cb & GUEST_PAGE_OFFSET_MASK), VERR_INVALID_PARAMETER);
3020	AssertReturn(cb, VERR_INVALID_PARAMETER);
3021	AssertReturn(!(fFlags & ~PGMPHYS_MMIO2_FLAGS_VALID_MASK), VERR_INVALID_FLAGS);
3022
3023	const uint32_t cGuestPages = cb >> GUEST_PAGE_SHIFT;
3024	AssertLogRelReturn(((RTGCPHYS)cGuestPages << GUEST_PAGE_SHIFT) == cb, VERR_INVALID_PARAMETER);
3025	AssertLogRelReturn(cGuestPages <= (MM_MMIO_64_MAX >> X86_PAGE_SHIFT), VERR_OUT_OF_RANGE);
3026	AssertLogRelReturn(cGuestPages <= PGM_MMIO2_MAX_PAGE_COUNT, VERR_OUT_OF_RANGE);
3027
3028	/*
3029	* For the 2nd+ instance, mangle the description string so it's unique.
3030	*/
3031	if (pDevIns->iInstance > 0) /** @todo Move to PDMDevHlp.cpp and use a real string cache. */
3032	{
3033	pszDesc = MMR3HeapAPrintf(pVM, MM_TAG_PGM_PHYS, "%s [%u]", pszDesc, pDevIns->iInstance);
3034	if (!pszDesc)
3035	return VERR_NO_MEMORY;
3036	}
3037
3038	/*
3039	* Allocate an MMIO2 range ID (not freed on failure).
3040	*
3041	* The zero ID is not used as it could be confused with NIL_GMM_PAGEID, so
3042	* the IDs goes from 1 thru PGM_MMIO2_MAX_RANGES.
3043	*/
3044	unsigned cChunks = pgmR3PhysMmio2CalcChunkCount(pVM, cb, NULL, NULL);
3045
3046	PGM_LOCK_VOID(pVM);
3047	AssertCompile(PGM_MMIO2_MAX_RANGES < 255);
3048	uint8_t const idMmio2 = pVM->pgm.s.cMmio2Regions + 1;
3049	unsigned const cNewMmio2Regions = pVM->pgm.s.cMmio2Regions + cChunks;
3050	if (cNewMmio2Regions > PGM_MMIO2_MAX_RANGES)
3051	{
3052	PGM_UNLOCK(pVM);
3053	AssertLogRelFailedReturn(VERR_PGM_TOO_MANY_MMIO2_RANGES);
3054	}
3055	pVM->pgm.s.cMmio2Regions = cNewMmio2Regions;
3056	PGM_UNLOCK(pVM);
3057
3058	/*
3059	* Try reserve and allocate the backing memory first as this is what is
3060	* most likely to fail.
3061	*/
3062	int rc = MMR3AdjustFixedReservation(pVM, cGuestPages, pszDesc);
3063	if (RT_SUCCESS(rc))
3064	{
3065	const uint32_t cHostPages = RT_ALIGN_T(cb, HOST_PAGE_SIZE, RTGCPHYS) >> HOST_PAGE_SHIFT;
3066	PSUPPAGE paPages = (PSUPPAGE)RTMemTmpAlloc(cHostPages * sizeof(SUPPAGE));
3067	if (RT_SUCCESS(rc))
3068	{
3069	void *pvPages = NULL;
3070	#ifndef VBOX_WITH_LINEAR_HOST_PHYS_MEM
3071	RTR0PTR pvPagesR0 = NIL_RTR0PTR;
3072	#endif
3073	#ifdef VBOX_WITH_PGM_NEM_MODE
3074	if (PGM_IS_IN_NEM_MODE(pVM))
3075	rc = SUPR3PageAlloc(cHostPages, pVM->pgm.s.fUseLargePages ? SUP_PAGE_ALLOC_F_LARGE_PAGES : 0, &pvPages);
3076	else
3077	#endif
3078	{
3079	#ifndef VBOX_WITH_LINEAR_HOST_PHYS_MEM
3080	rc = SUPR3PageAllocEx(cHostPages, 0 /fFlags/, &pvPages, &pvPagesR0, paPages);
3081	#else
3082	rc = SUPR3PageAllocEx(cHostPages, 0 /fFlags/, &pvPages, NULL /pR0Ptr/, paPages);
3083	#endif
3084	}
3085	if (RT_SUCCESS(rc))
3086	{
3087	memset(pvPages, 0, cGuestPages * GUEST_PAGE_SIZE);
3088
3089	/*
3090	* Create the registered MMIO range record for it.
3091	*/
3092	PPGMREGMMIO2RANGE pNew;
3093	rc = pgmR3PhysMmio2Create(pVM, pDevIns, iSubDev, iRegion, cb, fFlags, idMmio2, pszDesc, &pNew);
3094	if (RT_SUCCESS(rc))
3095	{
3096	if (phRegion)
3097	phRegion = idMmio2; / The ID of the first chunk. */
3098
3099	uint32_t iSrcPage = 0;
3100	uint8_t pbCurPages = (uint8_t )pvPages;
3101	for (PPGMREGMMIO2RANGE pCur = pNew; pCur; pCur = pCur->pNextR3)
3102	{
3103	pCur->pvR3 = pbCurPages;
3104	#ifndef VBOX_WITH_LINEAR_HOST_PHYS_MEM
3105	pCur->pvR0 = pvPagesR0 + (iSrcPage << GUEST_PAGE_SHIFT);
3106	#endif
3107	pCur->RamRange.pvR3 = pbCurPages;
3108
3109	uint32_t iDstPage = pCur->RamRange.cb >> GUEST_PAGE_SHIFT;
3110	#ifdef VBOX_WITH_PGM_NEM_MODE
3111	if (PGM_IS_IN_NEM_MODE(pVM))
3112	while (iDstPage-- > 0)
3113	PGM_PAGE_INIT(&pNew->RamRange.aPages[iDstPage], UINT64_C(0x0000ffffffff0000),
3114	PGM_MMIO2_PAGEID_MAKE(idMmio2, iDstPage),
3115	PGMPAGETYPE_MMIO2, PGM_PAGE_STATE_ALLOCATED);
3116	else
3117	#endif
3118	{
3119	AssertRelease(HOST_PAGE_SHIFT == GUEST_PAGE_SHIFT);
3120	while (iDstPage-- > 0)
3121	PGM_PAGE_INIT(&pNew->RamRange.aPages[iDstPage], paPages[iDstPage + iSrcPage].Phys,
3122	PGM_MMIO2_PAGEID_MAKE(idMmio2, iDstPage),
3123	PGMPAGETYPE_MMIO2, PGM_PAGE_STATE_ALLOCATED);
3124	}
3125
3126	/* advance. */
3127	iSrcPage += pCur->RamRange.cb >> GUEST_PAGE_SHIFT;
3128	pbCurPages += pCur->RamRange.cb;
3129	}
3130
3131	RTMemTmpFree(paPages);
3132
3133	/*
3134	* Update the page count stats, link the registration and we're done.
3135	*/
3136	pVM->pgm.s.cAllPages += cGuestPages;
3137	pVM->pgm.s.cPrivatePages += cGuestPages;
3138
3139	pgmR3PhysMmio2Link(pVM, pNew);
3140
3141	*ppv = pvPages;
3142	return VINF_SUCCESS;
3143	}
3144
3145	SUPR3PageFreeEx(pvPages, cHostPages);
3146	}
3147	}
3148	RTMemTmpFree(paPages);
3149	MMR3AdjustFixedReservation(pVM, -(int32_t)cGuestPages, pszDesc);
3150	}
3151	if (pDevIns->iInstance > 0)
3152	MMR3HeapFree((void *)pszDesc);
3153	return rc;
3154	}
3155
3156
3157	/**
3158	* Deregisters and frees an MMIO2 region.
3159	*
3160	* Any physical access handlers registered for the region must be deregistered
3161	* before calling this function.
3162	*
3163	* @returns VBox status code.
3164	* @param pVM The cross context VM structure.
3165	* @param pDevIns The device instance owning the region.
3166	* @param hMmio2 The MMIO2 handle to deregister, or NIL if all
3167	* regions for the given device is to be deregistered.
3168	*/
3169	VMMR3_INT_DECL(int) PGMR3PhysMmio2Deregister(PVM pVM, PPDMDEVINS pDevIns, PGMMMIO2HANDLE hMmio2)
3170	{
3171	/*
3172	* Validate input.
3173	*/
3174	VM_ASSERT_EMT_RETURN(pVM, VERR_VM_THREAD_NOT_EMT);
3175	AssertPtrReturn(pDevIns, VERR_INVALID_PARAMETER);
3176
3177	/*
3178	* The loop here scanning all registrations will make sure that multi-chunk ranges
3179	* get properly deregistered, though it's original purpose was the wildcard iRegion.
3180	*/
3181	PGM_LOCK_VOID(pVM);
3182	int rc = VINF_SUCCESS;
3183	unsigned cFound = 0;
3184	PPGMREGMMIO2RANGE pPrev = NULL;
3185	PPGMREGMMIO2RANGE pCur = pVM->pgm.s.pRegMmioRangesR3;
3186	while (pCur)
3187	{
3188	uint32_t const fFlags = pCur->fFlags;
3189	if ( pCur->pDevInsR3 == pDevIns
3190	&& ( hMmio2 == NIL_PGMMMIO2HANDLE
3191	\|\| pCur->idMmio2 == hMmio2))
3192	{
3193	cFound++;
3194
3195	/*
3196	* Unmap it if it's mapped.
3197	*/
3198	if (fFlags & PGMREGMMIO2RANGE_F_MAPPED)
3199	{
3200	int rc2 = PGMR3PhysMmio2Unmap(pVM, pCur->pDevInsR3, pCur->idMmio2, pCur->RamRange.GCPhys);
3201	AssertRC(rc2);
3202	if (RT_FAILURE(rc2) && RT_SUCCESS(rc))
3203	rc = rc2;
3204	}
3205
3206	/*
3207	* Unlink it
3208	*/
3209	PPGMREGMMIO2RANGE pNext = pCur->pNextR3;
3210	if (pPrev)
3211	pPrev->pNextR3 = pNext;
3212	else
3213	pVM->pgm.s.pRegMmioRangesR3 = pNext;
3214	pCur->pNextR3 = NULL;
3215
3216	uint8_t idMmio2 = pCur->idMmio2;
3217	Assert(idMmio2 <= RT_ELEMENTS(pVM->pgm.s.apMmio2RangesR3));
3218	if (idMmio2 <= RT_ELEMENTS(pVM->pgm.s.apMmio2RangesR3))
3219	{
3220	Assert(pVM->pgm.s.apMmio2RangesR3[idMmio2 - 1] == pCur);
3221	pVM->pgm.s.apMmio2RangesR3[idMmio2 - 1] = NULL;
3222	pVM->pgm.s.apMmio2RangesR0[idMmio2 - 1] = NIL_RTR0PTR;
3223	}
3224
3225	/*
3226	* Free the memory.
3227	*/
3228	uint32_t const cGuestPages = pCur->cbReal >> GUEST_PAGE_SHIFT;
3229	uint32_t const cHostPages = RT_ALIGN_T(pCur->cbReal, HOST_PAGE_SIZE, RTGCPHYS) >> HOST_PAGE_SHIFT;
3230	#ifdef VBOX_WITH_PGM_NEM_MODE
3231	if (!pVM->pgm.s.fNemMode)
3232	#endif
3233	{
3234	int rc2 = SUPR3PageFreeEx(pCur->pvR3, cHostPages);
3235	AssertRC(rc2);
3236	if (RT_FAILURE(rc2) && RT_SUCCESS(rc))
3237	rc = rc2;
3238
3239	rc2 = MMR3AdjustFixedReservation(pVM, -(int32_t)cGuestPages, pCur->RamRange.pszDesc);
3240	AssertRC(rc2);
3241	if (RT_FAILURE(rc2) && RT_SUCCESS(rc))
3242	rc = rc2;
3243	}
3244	#ifdef VBOX_WITH_PGM_NEM_MODE
3245	else
3246	{
3247	int rc2 = SUPR3PageFreeEx(pCur->pvR3, cHostPages);
3248	AssertRC(rc2);
3249	if (RT_FAILURE(rc2) && RT_SUCCESS(rc))
3250	rc = rc2;
3251	}
3252	#endif
3253
3254	if (pCur->pPhysHandlerR3)
3255	{
3256	pgmHandlerPhysicalExDestroy(pVM, pCur->pPhysHandlerR3);
3257	pCur->pPhysHandlerR3 = NULL;
3258	}
3259
3260	/* we're leaking hyper memory here if done at runtime. */
3261	#ifdef VBOX_STRICT
3262	VMSTATE const enmState = VMR3GetState(pVM);
3263	AssertMsg( enmState == VMSTATE_POWERING_OFF
3264	\|\| enmState == VMSTATE_POWERING_OFF_LS
3265	\|\| enmState == VMSTATE_OFF
3266	\|\| enmState == VMSTATE_OFF_LS
3267	\|\| enmState == VMSTATE_DESTROYING
3268	\|\| enmState == VMSTATE_TERMINATED
3269	\|\| enmState == VMSTATE_CREATING
3270	, ("%s\n", VMR3GetStateName(enmState)));
3271	#endif
3272
3273	if (pCur->RamRange.fFlags & PGM_RAM_RANGE_FLAGS_FLOATING)
3274	{
3275	const size_t cbRange = RT_UOFFSETOF_DYN(PGMREGMMIO2RANGE, RamRange.aPages[cGuestPages]);
3276	size_t const cChunkPages = RT_ALIGN_Z(cbRange, HOST_PAGE_SIZE) >> HOST_PAGE_SHIFT;
3277	SUPR3PageFreeEx(pCur, cChunkPages);
3278	}
3279	/*else
3280	{
3281	rc = MMHyperFree(pVM, pCur); - does not work, see the alloc call.
3282	AssertRCReturn(rc, rc);
3283	} */
3284
3285
3286	/* update page count stats */
3287	pVM->pgm.s.cAllPages -= cGuestPages;
3288	pVM->pgm.s.cPrivatePages -= cGuestPages;
3289
3290	/* next */
3291	pCur = pNext;
3292	if (hMmio2 != NIL_PGMMMIO2HANDLE)
3293	{
3294	if (fFlags & PGMREGMMIO2RANGE_F_LAST_CHUNK)
3295	break;
3296	hMmio2++;
3297	Assert(pCur->idMmio2 == hMmio2);
3298	Assert(pCur->pDevInsR3 == pDevIns);
3299	Assert(!(pCur->fFlags & PGMREGMMIO2RANGE_F_FIRST_CHUNK));
3300	}
3301	}
3302	else
3303	{
3304	pPrev = pCur;
3305	pCur = pCur->pNextR3;
3306	}
3307	}
3308	pgmPhysInvalidatePageMapTLB(pVM);
3309	PGM_UNLOCK(pVM);
3310	return !cFound && hMmio2 != NIL_PGMMMIO2HANDLE ? VERR_NOT_FOUND : rc;
3311	}
3312
3313
3314	/**
3315	* Maps a MMIO2 region.
3316	*
3317	* This is typically done when a guest / the bios / state loading changes the
3318	* PCI config. The replacing of base memory has the same restrictions as during
3319	* registration, of course.
3320	*
3321	* @returns VBox status code.
3322	*
3323	* @param pVM The cross context VM structure.
3324	* @param pDevIns The device instance owning the region.
3325	* @param hMmio2 The handle of the region to map.
3326	* @param GCPhys The guest-physical address to be remapped.
3327	*/
3328	VMMR3_INT_DECL(int) PGMR3PhysMmio2Map(PVM pVM, PPDMDEVINS pDevIns, PGMMMIO2HANDLE hMmio2, RTGCPHYS GCPhys)
3329	{
3330	/*
3331	* Validate input.
3332	*
3333	* Note! It's safe to walk the MMIO/MMIO2 list since registrations only
3334	* happens during VM construction.
3335	*/
3336	VM_ASSERT_EMT_RETURN(pVM, VERR_VM_THREAD_NOT_EMT);
3337	AssertPtrReturn(pDevIns, VERR_INVALID_PARAMETER);
3338	AssertReturn(GCPhys != NIL_RTGCPHYS, VERR_INVALID_PARAMETER);
3339	AssertReturn(GCPhys != 0, VERR_INVALID_PARAMETER);
3340	AssertReturn(!(GCPhys & GUEST_PAGE_OFFSET_MASK), VERR_INVALID_PARAMETER);
3341	AssertReturn(hMmio2 != NIL_PGMMMIO2HANDLE, VERR_INVALID_HANDLE);
3342
3343	PPGMREGMMIO2RANGE pFirstMmio = pgmR3PhysMmio2Find(pVM, pDevIns, UINT32_MAX, UINT32_MAX, hMmio2);
3344	AssertReturn(pFirstMmio, VERR_NOT_FOUND);
3345	Assert(pFirstMmio->fFlags & PGMREGMMIO2RANGE_F_FIRST_CHUNK);
3346
3347	PPGMREGMMIO2RANGE pLastMmio = pFirstMmio;
3348	RTGCPHYS cbRange = 0;
3349	for (;;)
3350	{
3351	AssertReturn(!(pLastMmio->fFlags & PGMREGMMIO2RANGE_F_MAPPED), VERR_WRONG_ORDER);
3352	Assert(pLastMmio->RamRange.GCPhys == NIL_RTGCPHYS);
3353	Assert(pLastMmio->RamRange.GCPhysLast == NIL_RTGCPHYS);
3354	Assert(pLastMmio->pDevInsR3 == pFirstMmio->pDevInsR3);
3355	Assert(pLastMmio->iSubDev == pFirstMmio->iSubDev);
3356	Assert(pLastMmio->iRegion == pFirstMmio->iRegion);
3357	cbRange += pLastMmio->RamRange.cb;
3358	if (pLastMmio->fFlags & PGMREGMMIO2RANGE_F_LAST_CHUNK)
3359	break;
3360	pLastMmio = pLastMmio->pNextR3;
3361	}
3362
3363	RTGCPHYS GCPhysLast = GCPhys + cbRange - 1;
3364	AssertLogRelReturn(GCPhysLast > GCPhys, VERR_INVALID_PARAMETER);
3365
3366	/*
3367	* Find our location in the ram range list, checking for restriction
3368	* we don't bother implementing yet (partially overlapping, multiple
3369	* ram ranges).
3370	*/
3371	PGM_LOCK_VOID(pVM);
3372
3373	AssertReturnStmt(!(pFirstMmio->fFlags & PGMREGMMIO2RANGE_F_MAPPED), PGM_UNLOCK(pVM), VERR_WRONG_ORDER);
3374
3375	bool fRamExists = false;
3376	PPGMRAMRANGE pRamPrev = NULL;
3377	PPGMRAMRANGE pRam = pVM->pgm.s.pRamRangesXR3;
3378	while (pRam && GCPhysLast >= pRam->GCPhys)
3379	{
3380	if ( GCPhys <= pRam->GCPhysLast
3381	&& GCPhysLast >= pRam->GCPhys)
3382	{
3383	/* Completely within? */
3384	AssertLogRelMsgReturnStmt( GCPhys >= pRam->GCPhys
3385	&& GCPhysLast <= pRam->GCPhysLast,
3386	("%RGp-%RGp (MMIOEx/%s) falls partly outside %RGp-%RGp (%s)\n",
3387	GCPhys, GCPhysLast, pFirstMmio->RamRange.pszDesc,
3388	pRam->GCPhys, pRam->GCPhysLast, pRam->pszDesc),
3389	PGM_UNLOCK(pVM),
3390	VERR_PGM_RAM_CONFLICT);
3391
3392	/* Check that all the pages are RAM pages. */
3393	PPGMPAGE pPage = &pRam->aPages[(GCPhys - pRam->GCPhys) >> GUEST_PAGE_SHIFT];
3394	uint32_t cPagesLeft = cbRange >> GUEST_PAGE_SHIFT;
3395	while (cPagesLeft-- > 0)
3396	{
3397	AssertLogRelMsgReturnStmt(PGM_PAGE_GET_TYPE(pPage) == PGMPAGETYPE_RAM,
3398	("%RGp isn't a RAM page (%d) - mapping %RGp-%RGp (MMIO2/%s).\n",
3399	GCPhys, PGM_PAGE_GET_TYPE(pPage), GCPhys, GCPhysLast, pFirstMmio->RamRange.pszDesc),
3400	PGM_UNLOCK(pVM),
3401	VERR_PGM_RAM_CONFLICT);
3402	pPage++;
3403	}
3404
3405	/* There can only be one MMIO/MMIO2 chunk matching here! */
3406	AssertLogRelMsgReturnStmt(pFirstMmio->fFlags & PGMREGMMIO2RANGE_F_LAST_CHUNK,
3407	("%RGp-%RGp (MMIOEx/%s, flags %#X) consists of multiple chunks whereas the RAM somehow doesn't!\n",
3408	GCPhys, GCPhysLast, pFirstMmio->RamRange.pszDesc, pFirstMmio->fFlags),
3409	PGM_UNLOCK(pVM),
3410	VERR_PGM_PHYS_MMIO_EX_IPE);
3411
3412	fRamExists = true;
3413	break;
3414	}
3415
3416	/* next */
3417	pRamPrev = pRam;
3418	pRam = pRam->pNextR3;
3419	}
3420	Log(("PGMR3PhysMmio2Map: %RGp-%RGp fRamExists=%RTbool %s\n", GCPhys, GCPhysLast, fRamExists, pFirstMmio->RamRange.pszDesc));
3421
3422
3423	/*
3424	* Make the changes.
3425	*/
3426	RTGCPHYS GCPhysCur = GCPhys;
3427	for (PPGMREGMMIO2RANGE pCurMmio = pFirstMmio; ; pCurMmio = pCurMmio->pNextR3)
3428	{
3429	pCurMmio->RamRange.GCPhys = GCPhysCur;
3430	pCurMmio->RamRange.GCPhysLast = GCPhysCur + pCurMmio->RamRange.cb - 1;
3431	if (pCurMmio->fFlags & PGMREGMMIO2RANGE_F_LAST_CHUNK)
3432	{
3433	Assert(pCurMmio->RamRange.GCPhysLast == GCPhysLast);
3434	break;
3435	}
3436	GCPhysCur += pCurMmio->RamRange.cb;
3437	}
3438
3439	if (fRamExists)
3440	{
3441	/*
3442	* Make all the pages in the range MMIO/ZERO pages, freeing any
3443	* RAM pages currently mapped here. This might not be 100% correct
3444	* for PCI memory, but we're doing the same thing for MMIO2 pages.
3445	*
3446	* We replace these MMIO/ZERO pages with real pages in the MMIO2 case.
3447	*/
3448	Assert(pFirstMmio->fFlags & PGMREGMMIO2RANGE_F_LAST_CHUNK); /* Only one chunk */
3449	Assert(pFirstMmio->pvR3 == pFirstMmio->RamRange.pvR3);
3450	Assert(pFirstMmio->RamRange.pvR3 != NULL);
3451
3452	#ifdef VBOX_WITH_PGM_NEM_MODE
3453	/* We cannot mix MMIO2 into a RAM range in simplified memory mode because pRam->pvR3 can't point
3454	both at the RAM and MMIO2, so we won't ever write & read from the actual MMIO2 memory if we try. */
3455	AssertLogRelMsgReturn(!pVM->pgm.s.fNemMode, ("%s at %RGp-%RGp\n", pFirstMmio->RamRange.pszDesc, GCPhys, GCPhysLast),
3456	VERR_PGM_NOT_SUPPORTED_FOR_NEM_MODE);
3457	#endif
3458
3459	int rc = pgmR3PhysFreePageRange(pVM, pRam, GCPhys, GCPhysLast, pFirstMmio->RamRange.pvR3);
3460	AssertRCReturnStmt(rc, PGM_UNLOCK(pVM), rc);
3461
3462	/* Replace the pages, freeing all present RAM pages. */
3463	PPGMPAGE pPageSrc = &pFirstMmio->RamRange.aPages[0];
3464	PPGMPAGE pPageDst = &pRam->aPages[(GCPhys - pRam->GCPhys) >> GUEST_PAGE_SHIFT];
3465	uint32_t cPagesLeft = pFirstMmio->RamRange.cb >> GUEST_PAGE_SHIFT;
3466	while (cPagesLeft-- > 0)
3467	{
3468	Assert(PGM_PAGE_IS_MMIO(pPageDst));
3469
3470	RTHCPHYS const HCPhys = PGM_PAGE_GET_HCPHYS(pPageSrc);
3471	uint32_t const idPage = PGM_PAGE_GET_PAGEID(pPageSrc);
3472	PGM_PAGE_SET_PAGEID(pVM, pPageDst, idPage);
3473	PGM_PAGE_SET_HCPHYS(pVM, pPageDst, HCPhys);
3474	PGM_PAGE_SET_TYPE(pVM, pPageDst, PGMPAGETYPE_MMIO2);
3475	PGM_PAGE_SET_STATE(pVM, pPageDst, PGM_PAGE_STATE_ALLOCATED);
3476	PGM_PAGE_SET_PDE_TYPE(pVM, pPageDst, PGM_PAGE_PDE_TYPE_DONTCARE);
3477	PGM_PAGE_SET_PTE_INDEX(pVM, pPageDst, 0);
3478	PGM_PAGE_SET_TRACKING(pVM, pPageDst, 0);
3479	/* NEM state is set by pgmR3PhysFreePageRange. */
3480
3481	pVM->pgm.s.cZeroPages--;
3482	GCPhys += GUEST_PAGE_SIZE;
3483	pPageSrc++;
3484	pPageDst++;
3485	}
3486
3487	/* Flush physical page map TLB. */
3488	pgmPhysInvalidatePageMapTLB(pVM);
3489
3490	/* Force a PGM pool flush as guest ram references have been changed. */
3491	/** @todo not entirely SMP safe; assuming for now the guest takes care of
3492	* this internally (not touch mapped mmio while changing the mapping). */
3493	PVMCPU pVCpu = VMMGetCpu(pVM);
3494	pVCpu->pgm.s.fSyncFlags \|= PGM_SYNC_CLEAR_PGM_POOL;
3495	VMCPU_FF_SET(pVCpu, VMCPU_FF_PGM_SYNC_CR3);
3496	}
3497	else
3498	{
3499	/*
3500	* No RAM range, insert the ones prepared during registration.
3501	*/
3502	for (PPGMREGMMIO2RANGE pCurMmio = pFirstMmio; ; pCurMmio = pCurMmio->pNextR3)
3503	{
3504	#ifdef VBOX_WITH_NATIVE_NEM
3505	/* Tell NEM and get the new NEM state for the pages. */
3506	uint8_t u2NemState = 0;
3507	if (VM_IS_NEM_ENABLED(pVM))
3508	{
3509	int rc = NEMR3NotifyPhysMmioExMapEarly(pVM, pCurMmio->RamRange.GCPhys,
3510	pCurMmio->RamRange.GCPhysLast - pCurMmio->RamRange.GCPhys + 1,
3511	NEM_NOTIFY_PHYS_MMIO_EX_F_MMIO2
3512	\| (pCurMmio->fFlags & PGMREGMMIO2RANGE_F_TRACK_DIRTY_PAGES
3513	? NEM_NOTIFY_PHYS_MMIO_EX_F_TRACK_DIRTY_PAGES : 0),
3514	NULL /pvRam/, pCurMmio->RamRange.pvR3,
3515	&u2NemState, &pCurMmio->RamRange.uNemRange);
3516	AssertLogRelRCReturnStmt(rc, PGM_UNLOCK(pVM), rc);
3517	}
3518	#endif
3519
3520	/* Clear the tracking data of pages we're going to reactivate. */
3521	PPGMPAGE pPageSrc = &pCurMmio->RamRange.aPages[0];
3522	uint32_t cPagesLeft = pCurMmio->RamRange.cb >> GUEST_PAGE_SHIFT;
3523	while (cPagesLeft-- > 0)
3524	{
3525	PGM_PAGE_SET_TRACKING(pVM, pPageSrc, 0);
3526	PGM_PAGE_SET_PTE_INDEX(pVM, pPageSrc, 0);
3527	#ifdef VBOX_WITH_NATIVE_NEM
3528	PGM_PAGE_SET_NEM_STATE(pPageSrc, u2NemState);
3529	#endif
3530	pPageSrc++;
3531	}
3532
3533	/* link in the ram range */
3534	pgmR3PhysLinkRamRange(pVM, &pCurMmio->RamRange, pRamPrev);
3535
3536	if (pCurMmio->fFlags & PGMREGMMIO2RANGE_F_LAST_CHUNK)
3537	{
3538	Assert(pCurMmio->RamRange.GCPhysLast == GCPhysLast);
3539	break;
3540	}
3541	pRamPrev = &pCurMmio->RamRange;
3542	}
3543	}
3544
3545	/*
3546	* If the range have dirty page monitoring enabled, enable that.
3547	*
3548	* We ignore failures here for now because if we fail, the whole mapping
3549	* will have to be reversed and we'll end up with nothing at all on the
3550	* screen and a grumpy guest, whereas if we just go on, we'll only have
3551	* visual distortions to gripe about. There will be something in the
3552	* release log.
3553	*/
3554	if ( pFirstMmio->pPhysHandlerR3
3555	&& (pFirstMmio->fFlags & PGMREGMMIO2RANGE_F_TRACKING_ENABLED))
3556	pgmR3PhysMmio2EnableDirtyPageTracing(pVM, pFirstMmio);
3557
3558	/*
3559	* We're good, set the flags and invalid the mapping TLB.
3560	*/
3561	for (PPGMREGMMIO2RANGE pCurMmio = pFirstMmio; ; pCurMmio = pCurMmio->pNextR3)
3562	{
3563	pCurMmio->fFlags \|= PGMREGMMIO2RANGE_F_MAPPED;
3564	if (fRamExists)
3565	pCurMmio->fFlags \|= PGMREGMMIO2RANGE_F_OVERLAPPING;
3566	else
3567	pCurMmio->fFlags &= ~PGMREGMMIO2RANGE_F_OVERLAPPING;
3568	if (pCurMmio->fFlags & PGMREGMMIO2RANGE_F_LAST_CHUNK)
3569	break;
3570	}
3571	pgmPhysInvalidatePageMapTLB(pVM);
3572
3573	#ifdef VBOX_WITH_NATIVE_NEM
3574	/*
3575	* Late NEM notification.
3576	*/
3577	if (VM_IS_NEM_ENABLED(pVM))
3578	{
3579	int rc;
3580	uint32_t fNemFlags = NEM_NOTIFY_PHYS_MMIO_EX_F_MMIO2;
3581	if (pFirstMmio->fFlags & PGMREGMMIO2RANGE_F_TRACK_DIRTY_PAGES)
3582	fNemFlags \|= NEM_NOTIFY_PHYS_MMIO_EX_F_TRACK_DIRTY_PAGES;
3583	if (fRamExists)
3584	rc = NEMR3NotifyPhysMmioExMapLate(pVM, GCPhys, GCPhysLast - GCPhys + 1, fNemFlags \| NEM_NOTIFY_PHYS_MMIO_EX_F_REPLACE,
3585	pRam->pvR3 ? (uint8_t *)pRam->pvR3 + GCPhys - pRam->GCPhys : NULL, pFirstMmio->pvR3,
3586	NULL /puNemRange/);
3587	else
3588	{
3589	rc = VINF_SUCCESS;
3590	for (PPGMREGMMIO2RANGE pCurMmio = pFirstMmio; ; pCurMmio = pCurMmio->pNextR3)
3591	{
3592	rc = NEMR3NotifyPhysMmioExMapLate(pVM, pCurMmio->RamRange.GCPhys, pCurMmio->RamRange.cb, fNemFlags,
3593	NULL, pCurMmio->RamRange.pvR3, &pCurMmio->RamRange.uNemRange);
3594	if ((pCurMmio->fFlags & PGMREGMMIO2RANGE_F_LAST_CHUNK) \|\| RT_FAILURE(rc))
3595	break;
3596	}
3597	}
3598	AssertLogRelRCReturnStmt(rc, PGMR3PhysMmio2Unmap(pVM, pDevIns, hMmio2, GCPhys); PGM_UNLOCK(pVM), rc);
3599	}
3600	#endif
3601
3602	PGM_UNLOCK(pVM);
3603
3604	return VINF_SUCCESS;
3605	}
3606
3607
3608	/**
3609	* Unmaps an MMIO2 region.
3610	*
3611	* This is typically done when a guest / the bios / state loading changes the
3612	* PCI config. The replacing of base memory has the same restrictions as during
3613	* registration, of course.
3614	*/
3615	VMMR3_INT_DECL(int) PGMR3PhysMmio2Unmap(PVM pVM, PPDMDEVINS pDevIns, PGMMMIO2HANDLE hMmio2, RTGCPHYS GCPhys)
3616	{
3617	/*
3618	* Validate input
3619	*/
3620	VM_ASSERT_EMT_RETURN(pVM, VERR_VM_THREAD_NOT_EMT);
3621	AssertPtrReturn(pDevIns, VERR_INVALID_PARAMETER);
3622	AssertReturn(hMmio2 != NIL_PGMMMIO2HANDLE, VERR_INVALID_HANDLE);
3623	if (GCPhys != NIL_RTGCPHYS)
3624	{
3625	AssertReturn(GCPhys != 0, VERR_INVALID_PARAMETER);
3626	AssertReturn(!(GCPhys & GUEST_PAGE_OFFSET_MASK), VERR_INVALID_PARAMETER);
3627	}
3628
3629	PPGMREGMMIO2RANGE pFirstMmio = pgmR3PhysMmio2Find(pVM, pDevIns, UINT32_MAX, UINT32_MAX, hMmio2);
3630	AssertReturn(pFirstMmio, VERR_NOT_FOUND);
3631	Assert(pFirstMmio->fFlags & PGMREGMMIO2RANGE_F_FIRST_CHUNK);
3632
3633	int rc = PGM_LOCK(pVM);
3634	AssertRCReturn(rc, rc);
3635
3636	PPGMREGMMIO2RANGE pLastMmio = pFirstMmio;
3637	RTGCPHYS cbRange = 0;
3638	for (;;)
3639	{
3640	AssertReturnStmt(pLastMmio->fFlags & PGMREGMMIO2RANGE_F_MAPPED, PGM_UNLOCK(pVM), VERR_WRONG_ORDER);
3641	AssertReturnStmt(pLastMmio->RamRange.GCPhys == GCPhys + cbRange \|\| GCPhys == NIL_RTGCPHYS, PGM_UNLOCK(pVM), VERR_INVALID_PARAMETER);
3642	Assert(pLastMmio->pDevInsR3 == pFirstMmio->pDevInsR3);
3643	Assert(pLastMmio->iSubDev == pFirstMmio->iSubDev);
3644	Assert(pLastMmio->iRegion == pFirstMmio->iRegion);
3645	cbRange += pLastMmio->RamRange.cb;
3646	if (pLastMmio->fFlags & PGMREGMMIO2RANGE_F_LAST_CHUNK)
3647	break;
3648	pLastMmio = pLastMmio->pNextR3;
3649	}
3650
3651	Log(("PGMR3PhysMmio2Unmap: %RGp-%RGp %s\n",
3652	pFirstMmio->RamRange.GCPhys, pLastMmio->RamRange.GCPhysLast, pFirstMmio->RamRange.pszDesc));
3653
3654	uint16_t const fOldFlags = pFirstMmio->fFlags;
3655	AssertReturnStmt(fOldFlags & PGMREGMMIO2RANGE_F_MAPPED, PGM_UNLOCK(pVM), VERR_WRONG_ORDER);
3656
3657	/*
3658	* If monitoring dirty pages, we must deregister the handlers first.
3659	*/
3660	if ( pFirstMmio->pPhysHandlerR3
3661	&& (fOldFlags & PGMREGMMIO2RANGE_F_TRACKING_ENABLED))
3662	pgmR3PhysMmio2DisableDirtyPageTracing(pVM, pFirstMmio);
3663
3664	/*
3665	* Unmap it.
3666	*/
3667	int rcRet = VINF_SUCCESS;
3668	#ifdef VBOX_WITH_NATIVE_NEM
3669	uint32_t const fNemFlags = NEM_NOTIFY_PHYS_MMIO_EX_F_MMIO2
3670	\| (fOldFlags & PGMREGMMIO2RANGE_F_TRACK_DIRTY_PAGES
3671	? NEM_NOTIFY_PHYS_MMIO_EX_F_TRACK_DIRTY_PAGES : 0);
3672	#endif
3673	if (fOldFlags & PGMREGMMIO2RANGE_F_OVERLAPPING)
3674	{
3675	/*
3676	* We've replaced RAM, replace with zero pages.
3677	*
3678	* Note! This is where we might differ a little from a real system, because
3679	* it's likely to just show the RAM pages as they were before the
3680	* MMIO/MMIO2 region was mapped here.
3681	*/
3682	/* Only one chunk allowed when overlapping! */
3683	Assert(fOldFlags & PGMREGMMIO2RANGE_F_LAST_CHUNK);
3684
3685	/* Restore the RAM pages we've replaced. */
3686	PPGMRAMRANGE pRam = pVM->pgm.s.pRamRangesXR3;
3687	while (pRam->GCPhys > pFirstMmio->RamRange.GCPhysLast)
3688	pRam = pRam->pNextR3;
3689
3690	PPGMPAGE pPageDst = &pRam->aPages[(pFirstMmio->RamRange.GCPhys - pRam->GCPhys) >> GUEST_PAGE_SHIFT];
3691	uint32_t cPagesLeft = pFirstMmio->RamRange.cb >> GUEST_PAGE_SHIFT;
3692	pVM->pgm.s.cZeroPages += cPagesLeft; /** @todo not correct for NEM mode */
3693
3694	#ifdef VBOX_WITH_NATIVE_NEM
3695	if (VM_IS_NEM_ENABLED(pVM)) /* Notify NEM. Note! we cannot be here in simple memory mode, see mapping function. */
3696	{
3697	uint8_t u2State = UINT8_MAX;
3698	rc = NEMR3NotifyPhysMmioExUnmap(pVM, pFirstMmio->RamRange.GCPhys, pFirstMmio->RamRange.cb,
3699	fNemFlags \| NEM_NOTIFY_PHYS_MMIO_EX_F_REPLACE,
3700	pRam->pvR3
3701	? (uint8_t *)pRam->pvR3 + pFirstMmio->RamRange.GCPhys - pRam->GCPhys : NULL,
3702	pFirstMmio->pvR3, &u2State, &pRam->uNemRange);
3703	AssertRCStmt(rc, rcRet = rc);
3704	if (u2State != UINT8_MAX)
3705	pgmPhysSetNemStateForPages(pPageDst, cPagesLeft, u2State);
3706	}
3707	#endif
3708
3709	while (cPagesLeft-- > 0)
3710	{
3711	PGM_PAGE_INIT_ZERO(pPageDst, pVM, PGMPAGETYPE_RAM);
3712	pPageDst++;
3713	}
3714
3715	/* Flush physical page map TLB. */
3716	pgmPhysInvalidatePageMapTLB(pVM);
3717
3718	/* Update range state. */
3719	pFirstMmio->RamRange.GCPhys = NIL_RTGCPHYS;
3720	pFirstMmio->RamRange.GCPhysLast = NIL_RTGCPHYS;
3721	pFirstMmio->fFlags &= ~(PGMREGMMIO2RANGE_F_OVERLAPPING \| PGMREGMMIO2RANGE_F_MAPPED);
3722	}
3723	else
3724	{
3725	/*
3726	* Unlink the chunks related to the MMIO/MMIO2 region.
3727	*/
3728	for (PPGMREGMMIO2RANGE pCurMmio = pFirstMmio; ; pCurMmio = pCurMmio->pNextR3)
3729	{
3730	#ifdef VBOX_WITH_NATIVE_NEM
3731	if (VM_IS_NEM_ENABLED(pVM)) /* Notify NEM. */
3732	{
3733	uint8_t u2State = UINT8_MAX;
3734	rc = NEMR3NotifyPhysMmioExUnmap(pVM, pCurMmio->RamRange.GCPhys, pCurMmio->RamRange.cb, fNemFlags,
3735	NULL, pCurMmio->pvR3, &u2State, &pCurMmio->RamRange.uNemRange);
3736	AssertRCStmt(rc, rcRet = rc);
3737	if (u2State != UINT8_MAX)
3738	pgmPhysSetNemStateForPages(pCurMmio->RamRange.aPages, pCurMmio->RamRange.cb >> GUEST_PAGE_SHIFT, u2State);
3739	}
3740	#endif
3741	pgmR3PhysUnlinkRamRange(pVM, &pCurMmio->RamRange);
3742	pCurMmio->RamRange.GCPhys = NIL_RTGCPHYS;
3743	pCurMmio->RamRange.GCPhysLast = NIL_RTGCPHYS;
3744	pCurMmio->fFlags &= ~(PGMREGMMIO2RANGE_F_OVERLAPPING \| PGMREGMMIO2RANGE_F_MAPPED);
3745	if (pCurMmio->fFlags & PGMREGMMIO2RANGE_F_LAST_CHUNK)
3746	break;
3747	}
3748	}
3749
3750	/* Force a PGM pool flush as guest ram references have been changed. */
3751	/** @todo not entirely SMP safe; assuming for now the guest takes care
3752	* of this internally (not touch mapped mmio while changing the
3753	* mapping). */
3754	PVMCPU pVCpu = VMMGetCpu(pVM);
3755	pVCpu->pgm.s.fSyncFlags \|= PGM_SYNC_CLEAR_PGM_POOL;
3756	VMCPU_FF_SET(pVCpu, VMCPU_FF_PGM_SYNC_CR3);
3757
3758	pgmPhysInvalidatePageMapTLB(pVM);
3759	pgmPhysInvalidRamRangeTlbs(pVM);
3760
3761	PGM_UNLOCK(pVM);
3762	return rcRet;
3763	}
3764
3765
3766	/**
3767	* Reduces the mapping size of a MMIO2 region.
3768	*
3769	* This is mainly for dealing with old saved states after changing the default
3770	* size of a mapping region. See PGMDevHlpMMIOExReduce and
3771	* PDMPCIDEV::pfnRegionLoadChangeHookR3.
3772	*
3773	* The region must not currently be mapped when making this call. The VM state
3774	* must be state restore or VM construction.
3775	*
3776	* @returns VBox status code.
3777	* @param pVM The cross context VM structure.
3778	* @param pDevIns The device instance owning the region.
3779	* @param hMmio2 The handle of the region to reduce.
3780	* @param cbRegion The new mapping size.
3781	*/
3782	VMMR3_INT_DECL(int) PGMR3PhysMmio2Reduce(PVM pVM, PPDMDEVINS pDevIns, PGMMMIO2HANDLE hMmio2, RTGCPHYS cbRegion)
3783	{
3784	/*
3785	* Validate input
3786	*/
3787	VM_ASSERT_EMT_RETURN(pVM, VERR_VM_THREAD_NOT_EMT);
3788	AssertPtrReturn(pDevIns, VERR_INVALID_PARAMETER);
3789	AssertReturn(hMmio2 != NIL_PGMMMIO2HANDLE, VERR_INVALID_HANDLE);
3790	AssertReturn(cbRegion >= X86_PAGE_SIZE, VERR_INVALID_PARAMETER);
3791	AssertReturn(!(cbRegion & X86_PAGE_OFFSET_MASK), VERR_UNSUPPORTED_ALIGNMENT);
3792	VMSTATE enmVmState = VMR3GetState(pVM);
3793	AssertLogRelMsgReturn( enmVmState == VMSTATE_CREATING
3794	\|\| enmVmState == VMSTATE_LOADING,
3795	("enmVmState=%d (%s)\n", enmVmState, VMR3GetStateName(enmVmState)),
3796	VERR_VM_INVALID_VM_STATE);
3797
3798	int rc = PGM_LOCK(pVM);
3799	AssertRCReturn(rc, rc);
3800
3801	PPGMREGMMIO2RANGE pFirstMmio = pgmR3PhysMmio2Find(pVM, pDevIns, UINT32_MAX, UINT32_MAX, hMmio2);
3802	if (pFirstMmio)
3803	{
3804	Assert(pFirstMmio->fFlags & PGMREGMMIO2RANGE_F_FIRST_CHUNK);
3805	if (!(pFirstMmio->fFlags & PGMREGMMIO2RANGE_F_MAPPED))
3806	{
3807	/*
3808	* NOTE! Current implementation does not support multiple ranges.
3809	* Implement when there is a real world need and thus a testcase.
3810	*/
3811	AssertLogRelMsgStmt(pFirstMmio->fFlags & PGMREGMMIO2RANGE_F_LAST_CHUNK,
3812	("%s: %#x\n", pFirstMmio->RamRange.pszDesc, pFirstMmio->fFlags),
3813	rc = VERR_NOT_SUPPORTED);
3814	if (RT_SUCCESS(rc))
3815	{
3816	/*
3817	* Make the change.
3818	*/
3819	Log(("PGMR3PhysMmio2Reduce: %s changes from %RGp bytes (%RGp) to %RGp bytes.\n",
3820	pFirstMmio->RamRange.pszDesc, pFirstMmio->RamRange.cb, pFirstMmio->cbReal, cbRegion));
3821
3822	AssertLogRelMsgStmt(cbRegion <= pFirstMmio->cbReal,
3823	("%s: cbRegion=%#RGp cbReal=%#RGp\n", pFirstMmio->RamRange.pszDesc, cbRegion, pFirstMmio->cbReal),
3824	rc = VERR_OUT_OF_RANGE);
3825	if (RT_SUCCESS(rc))
3826	{
3827	pFirstMmio->RamRange.cb = cbRegion;
3828	}
3829	}
3830	}
3831	else
3832	rc = VERR_WRONG_ORDER;
3833	}
3834	else
3835	rc = VERR_NOT_FOUND;
3836
3837	PGM_UNLOCK(pVM);
3838	return rc;
3839	}
3840
3841
3842	/**
3843	* Validates @a hMmio2, making sure it belongs to @a pDevIns.
3844	*
3845	* @returns VBox status code.
3846	* @param pVM The cross context VM structure.
3847	* @param pDevIns The device which allegedly owns @a hMmio2.
3848	* @param hMmio2 The handle to validate.
3849	*/
3850	VMMR3_INT_DECL(int) PGMR3PhysMmio2ValidateHandle(PVM pVM, PPDMDEVINS pDevIns, PGMMMIO2HANDLE hMmio2)
3851	{
3852	/*
3853	* Validate input
3854	*/
3855	VM_ASSERT_EMT_RETURN(pVM, VERR_VM_THREAD_NOT_EMT);
3856	AssertPtrReturn(pDevIns, VERR_INVALID_POINTER);
3857
3858	/*
3859	* Just do this the simple way. No need for locking as this is only taken at
3860	*/
3861	PGM_LOCK_VOID(pVM);
3862	PPGMREGMMIO2RANGE pFirstMmio = pgmR3PhysMmio2Find(pVM, pDevIns, UINT32_MAX, UINT32_MAX, hMmio2);
3863	PGM_UNLOCK(pVM);
3864	AssertReturn(pFirstMmio, VERR_INVALID_HANDLE);
3865	AssertReturn(pFirstMmio->fFlags & PGMREGMMIO2RANGE_F_FIRST_CHUNK, VERR_INVALID_HANDLE);
3866	return VINF_SUCCESS;
3867	}
3868
3869
3870	/**
3871	* Gets the mapping address of an MMIO2 region.
3872	*
3873	* @returns Mapping address, NIL_RTGCPHYS if not mapped or invalid handle.
3874	*
3875	* @param pVM The cross context VM structure.
3876	* @param pDevIns The device owning the MMIO2 handle.
3877	* @param hMmio2 The region handle.
3878	*/
3879	VMMR3_INT_DECL(RTGCPHYS) PGMR3PhysMmio2GetMappingAddress(PVM pVM, PPDMDEVINS pDevIns, PGMMMIO2HANDLE hMmio2)
3880	{
3881	AssertPtrReturn(pDevIns, NIL_RTGCPHYS);
3882
3883	PPGMREGMMIO2RANGE pFirstRegMmio = pgmR3PhysMmio2Find(pVM, pDevIns, UINT32_MAX, UINT32_MAX, hMmio2);
3884	AssertReturn(pFirstRegMmio, NIL_RTGCPHYS);
3885
3886	if (pFirstRegMmio->fFlags & PGMREGMMIO2RANGE_F_MAPPED)
3887	return pFirstRegMmio->RamRange.GCPhys;
3888	return NIL_RTGCPHYS;
3889	}
3890
3891
3892	/**
3893	* Worker for PGMR3PhysMmio2QueryAndResetDirtyBitmap.
3894	*
3895	* Called holding the PGM lock.
3896	*/
3897	static int pgmR3PhysMmio2QueryAndResetDirtyBitmapLocked(PVM pVM, PPDMDEVINS pDevIns, PGMMMIO2HANDLE hMmio2,
3898	void *pvBitmap, size_t cbBitmap)
3899	{
3900	/*
3901	* Continue validation.
3902	*/
3903	PPGMREGMMIO2RANGE pFirstRegMmio = pgmR3PhysMmio2Find(pVM, pDevIns, UINT32_MAX, UINT32_MAX, hMmio2);
3904	AssertReturn(pFirstRegMmio, VERR_INVALID_HANDLE);
3905	AssertReturn( (pFirstRegMmio->fFlags & (PGMREGMMIO2RANGE_F_TRACK_DIRTY_PAGES \| PGMREGMMIO2RANGE_F_FIRST_CHUNK))
3906	== (PGMREGMMIO2RANGE_F_TRACK_DIRTY_PAGES \| PGMREGMMIO2RANGE_F_FIRST_CHUNK),
3907	VERR_INVALID_FUNCTION);
3908	AssertReturn(pDevIns == pFirstRegMmio->pDevInsR3, VERR_NOT_OWNER);
3909
3910	RTGCPHYS cbTotal = 0;
3911	uint16_t fTotalDirty = 0;
3912	for (PPGMREGMMIO2RANGE pCur = pFirstRegMmio;;)
3913	{
3914	cbTotal += pCur->RamRange.cb; /* Not using cbReal here, because NEM is not in on the creating, only the mapping. */
3915	fTotalDirty \|= pCur->fFlags;
3916	if (pCur->fFlags & PGMREGMMIO2RANGE_F_LAST_CHUNK)
3917	break;
3918	pCur = pCur->pNextR3;
3919	AssertPtrReturn(pCur, VERR_INTERNAL_ERROR_5);
3920	AssertReturn( (pCur->fFlags & (PGMREGMMIO2RANGE_F_TRACK_DIRTY_PAGES \| PGMREGMMIO2RANGE_F_FIRST_CHUNK))
3921	== PGMREGMMIO2RANGE_F_TRACK_DIRTY_PAGES,
3922	VERR_INTERNAL_ERROR_4);
3923	}
3924	size_t const cbTotalBitmap = RT_ALIGN_T(cbTotal, GUEST_PAGE_SIZE * 64, RTGCPHYS) / GUEST_PAGE_SIZE / 8;
3925
3926	if (cbBitmap)
3927	{
3928	AssertPtrReturn(pvBitmap, VERR_INVALID_POINTER);
3929	AssertReturn(RT_ALIGN_P(pvBitmap, sizeof(uint64_t)) == pvBitmap, VERR_INVALID_POINTER);
3930	AssertReturn(cbBitmap == cbTotalBitmap, VERR_INVALID_PARAMETER);
3931	}
3932
3933	/*
3934	* Do the work.
3935	*/
3936	int rc = VINF_SUCCESS;
3937	if (pvBitmap)
3938	{
3939	#ifdef VBOX_WITH_PGM_NEM_MODE
3940	if (pFirstRegMmio->pPhysHandlerR3 == NULL)
3941	{
3942	/** @todo This does not integrate at all with --execute-all-in-iem, leaving the
3943	* screen blank when using it together with --driverless. Fixing this won't be
3944	* entirely easy as we take the PGM_PAGE_HNDL_PHYS_STATE_DISABLED page status to
3945	* mean a dirty page. */
3946	AssertReturn(VM_IS_NEM_ENABLED(pVM), VERR_INTERNAL_ERROR_4);
3947	uint8_t pbBitmap = (uint8_t )pvBitmap;
3948	for (PPGMREGMMIO2RANGE pCur = pFirstRegMmio; pCur; pCur = pCur->pNextR3)
3949	{
3950	size_t const cbBitmapChunk = pCur->RamRange.cb / GUEST_PAGE_SIZE / 8;
3951	Assert((RTGCPHYS)cbBitmapChunk * GUEST_PAGE_SIZE * 8 == pCur->RamRange.cb);
3952	int rc2 = NEMR3PhysMmio2QueryAndResetDirtyBitmap(pVM, pCur->RamRange.GCPhys, pCur->RamRange.cb,
3953	pCur->RamRange.uNemRange, pbBitmap, cbBitmapChunk);
3954	if (RT_FAILURE(rc2) && RT_SUCCESS(rc))
3955	rc = rc2;
3956	if (pCur->fFlags & PGMREGMMIO2RANGE_F_LAST_CHUNK)
3957	break;
3958	pbBitmap += pCur->RamRange.cb / GUEST_PAGE_SIZE / 8;
3959	}
3960	}
3961	else
3962	#endif
3963	if (fTotalDirty & PGMREGMMIO2RANGE_F_IS_DIRTY)
3964	{
3965	if ( (pFirstRegMmio->fFlags & (PGMREGMMIO2RANGE_F_MAPPED \| PGMREGMMIO2RANGE_F_TRACKING_ENABLED))
3966	== (PGMREGMMIO2RANGE_F_MAPPED \| PGMREGMMIO2RANGE_F_TRACKING_ENABLED))
3967	{
3968	/*
3969	* Reset each chunk, gathering dirty bits.
3970	*/
3971	RT_BZERO(pvBitmap, cbBitmap); /* simpler for now. */
3972	uint32_t iPageNo = 0;
3973	for (PPGMREGMMIO2RANGE pCur = pFirstRegMmio; pCur; pCur = pCur->pNextR3)
3974	{
3975	if (pCur->fFlags & PGMREGMMIO2RANGE_F_IS_DIRTY)
3976	{
3977	int rc2 = pgmHandlerPhysicalResetMmio2WithBitmap(pVM, pCur->RamRange.GCPhys, pvBitmap, iPageNo);
3978	if (RT_FAILURE(rc2) && RT_SUCCESS(rc))
3979	rc = rc2;
3980	pCur->fFlags &= ~PGMREGMMIO2RANGE_F_IS_DIRTY;
3981	}
3982	if (pCur->fFlags & PGMREGMMIO2RANGE_F_LAST_CHUNK)
3983	break;
3984	iPageNo += pCur->RamRange.cb >> GUEST_PAGE_SHIFT;
3985	}
3986	}
3987	else
3988	{
3989	/*
3990	* If not mapped or tracking is disabled, we return the
3991	* PGMREGMMIO2RANGE_F_IS_DIRTY status for all pages. We cannot
3992	* get more accurate data than that after unmapping or disabling.
3993	*/
3994	RT_BZERO(pvBitmap, cbBitmap);
3995	uint32_t iPageNo = 0;
3996	for (PPGMREGMMIO2RANGE pCur = pFirstRegMmio; pCur; pCur = pCur->pNextR3)
3997	{
3998	if (pCur->fFlags & PGMREGMMIO2RANGE_F_IS_DIRTY)
3999	{
4000	ASMBitSetRange(pvBitmap, iPageNo, iPageNo + (pCur->RamRange.cb >> GUEST_PAGE_SHIFT));
4001	pCur->fFlags &= ~PGMREGMMIO2RANGE_F_IS_DIRTY;
4002	}
4003	if (pCur->fFlags & PGMREGMMIO2RANGE_F_LAST_CHUNK)
4004	break;
4005	iPageNo += pCur->RamRange.cb >> GUEST_PAGE_SHIFT;
4006	}
4007	}
4008	}
4009	/*
4010	* No dirty chunks.
4011	*/
4012	else
4013	RT_BZERO(pvBitmap, cbBitmap);
4014	}
4015	/*
4016	* No bitmap. Reset the region if tracking is currently enabled.
4017	*/
4018	else if ( (pFirstRegMmio->fFlags & (PGMREGMMIO2RANGE_F_MAPPED \| PGMREGMMIO2RANGE_F_TRACKING_ENABLED))
4019	== (PGMREGMMIO2RANGE_F_MAPPED \| PGMREGMMIO2RANGE_F_TRACKING_ENABLED))
4020	{
4021	#ifdef VBOX_WITH_PGM_NEM_MODE
4022	if (pFirstRegMmio->pPhysHandlerR3 == NULL)
4023	{
4024	AssertReturn(VM_IS_NEM_ENABLED(pVM), VERR_INTERNAL_ERROR_4);
4025	for (PPGMREGMMIO2RANGE pCur = pFirstRegMmio; pCur; pCur = pCur->pNextR3)
4026	{
4027	int rc2 = NEMR3PhysMmio2QueryAndResetDirtyBitmap(pVM, pCur->RamRange.GCPhys, pCur->RamRange.cb,
4028	pCur->RamRange.uNemRange, NULL, 0);
4029	if (RT_FAILURE(rc2) && RT_SUCCESS(rc))
4030	rc = rc2;
4031	if (pCur->fFlags & PGMREGMMIO2RANGE_F_LAST_CHUNK)
4032	break;
4033	}
4034	}
4035	else
4036	#endif
4037	{
4038	for (PPGMREGMMIO2RANGE pCur = pFirstRegMmio; pCur; pCur = pCur->pNextR3)
4039	{
4040	pCur->fFlags &= ~PGMREGMMIO2RANGE_F_IS_DIRTY;
4041	int rc2 = PGMHandlerPhysicalReset(pVM, pCur->RamRange.GCPhys);
4042	if (RT_FAILURE(rc2) && RT_SUCCESS(rc))
4043	rc = rc2;
4044	if (pCur->fFlags & PGMREGMMIO2RANGE_F_LAST_CHUNK)
4045	break;
4046	}
4047	}
4048	}
4049
4050	return rc;
4051	}
4052
4053
4054	/**
4055	* Queries the dirty page bitmap and resets the monitoring.
4056	*
4057	* The PGMPHYS_MMIO2_FLAGS_TRACK_DIRTY_PAGES flag must be specified when
4058	* creating the range for this to work.
4059	*
4060	* @returns VBox status code.
4061	* @retval VERR_INVALID_FUNCTION if not created using
4062	* PGMPHYS_MMIO2_FLAGS_TRACK_DIRTY_PAGES.
4063	* @param pVM The cross context VM structure.
4064	* @param pDevIns The device owning the MMIO2 handle.
4065	* @param hMmio2 The region handle.
4066	* @param pvBitmap The output bitmap. Must be 8-byte aligned. Ignored
4067	* when @a cbBitmap is zero.
4068	* @param cbBitmap The size of the bitmap. Must be the size of the whole
4069	* MMIO2 range, rounded up to the nearest 8 bytes.
4070	* When zero only a reset is done.
4071	*/
4072	VMMR3_INT_DECL(int) PGMR3PhysMmio2QueryAndResetDirtyBitmap(PVM pVM, PPDMDEVINS pDevIns, PGMMMIO2HANDLE hMmio2,
4073	void *pvBitmap, size_t cbBitmap)
4074	{
4075	/*
4076	* Do some basic validation before grapping the PGM lock and continuing.
4077	*/
4078	AssertPtrReturn(pDevIns, VERR_INVALID_POINTER);
4079	AssertReturn(RT_ALIGN_Z(cbBitmap, sizeof(uint64_t)) == cbBitmap, VERR_INVALID_PARAMETER);
4080	int rc = PGM_LOCK(pVM);
4081	if (RT_SUCCESS(rc))
4082	{
4083	STAM_PROFILE_START(&pVM->pgm.s.StatMmio2QueryAndResetDirtyBitmap, a);
4084	rc = pgmR3PhysMmio2QueryAndResetDirtyBitmapLocked(pVM, pDevIns, hMmio2, pvBitmap, cbBitmap);
4085	STAM_PROFILE_STOP(&pVM->pgm.s.StatMmio2QueryAndResetDirtyBitmap, a);
4086	PGM_UNLOCK(pVM);
4087	}
4088	return rc;
4089	}
4090
4091
4092	/**
4093	* Worker for PGMR3PhysMmio2ControlDirtyPageTracking
4094	*
4095	* Called owning the PGM lock.
4096	*/
4097	static int pgmR3PhysMmio2ControlDirtyPageTrackingLocked(PVM pVM, PPDMDEVINS pDevIns, PGMMMIO2HANDLE hMmio2, bool fEnabled)
4098	{
4099	/*
4100	* Continue validation.
4101	*/
4102	PPGMREGMMIO2RANGE pFirstRegMmio = pgmR3PhysMmio2Find(pVM, pDevIns, UINT32_MAX, UINT32_MAX, hMmio2);
4103	AssertReturn(pFirstRegMmio, VERR_INVALID_HANDLE);
4104	AssertReturn( (pFirstRegMmio->fFlags & (PGMREGMMIO2RANGE_F_TRACK_DIRTY_PAGES \| PGMREGMMIO2RANGE_F_FIRST_CHUNK))
4105	== (PGMREGMMIO2RANGE_F_TRACK_DIRTY_PAGES \| PGMREGMMIO2RANGE_F_FIRST_CHUNK)
4106	, VERR_INVALID_FUNCTION);
4107	AssertReturn(pDevIns == pFirstRegMmio->pDevInsR3, VERR_NOT_OWNER);
4108
4109	#ifdef VBOX_WITH_PGM_NEM_MODE
4110	/*
4111	* This is a nop if NEM is responsible for doing the tracking, we simply
4112	* leave the tracking on all the time there.
4113	*/
4114	if (pFirstRegMmio->pPhysHandlerR3 == NULL)
4115	{
4116	AssertReturn(VM_IS_NEM_ENABLED(pVM), VERR_INTERNAL_ERROR_4);
4117	return VINF_SUCCESS;
4118	}
4119	#endif
4120
4121	/*
4122	* Anyting needing doing?
4123	*/
4124	if (fEnabled != RT_BOOL(pFirstRegMmio->fFlags & PGMREGMMIO2RANGE_F_TRACKING_ENABLED))
4125	{
4126	LogFlowFunc(("fEnabled=%RTbool %s\n", fEnabled, pFirstRegMmio->RamRange.pszDesc));
4127
4128	/*
4129	* Update the PGMREGMMIO2RANGE_F_TRACKING_ENABLED flag.
4130	*/
4131	for (PPGMREGMMIO2RANGE pCur = pFirstRegMmio;;)
4132	{
4133	if (fEnabled)
4134	pCur->fFlags \|= PGMREGMMIO2RANGE_F_TRACKING_ENABLED;
4135	else
4136	pCur->fFlags &= ~PGMREGMMIO2RANGE_F_TRACKING_ENABLED;
4137	if (pCur->fFlags & PGMREGMMIO2RANGE_F_LAST_CHUNK)
4138	break;
4139	pCur = pCur->pNextR3;
4140	AssertPtrReturn(pCur, VERR_INTERNAL_ERROR_5);
4141	AssertReturn( (pCur->fFlags & (PGMREGMMIO2RANGE_F_TRACK_DIRTY_PAGES \| PGMREGMMIO2RANGE_F_FIRST_CHUNK))
4142	== PGMREGMMIO2RANGE_F_TRACK_DIRTY_PAGES
4143	, VERR_INTERNAL_ERROR_4);
4144	}
4145
4146	/*
4147	* Enable/disable handlers if currently mapped.
4148	*
4149	* We ignore status codes here as we've already changed the flags and
4150	* returning a failure status now would be confusing. Besides, the two
4151	* functions will continue past failures. As argued in the mapping code,
4152	* it's in the release log.
4153	*/
4154	if (pFirstRegMmio->fFlags & PGMREGMMIO2RANGE_F_MAPPED)
4155	{
4156	if (fEnabled)
4157	pgmR3PhysMmio2EnableDirtyPageTracing(pVM, pFirstRegMmio);
4158	else
4159	pgmR3PhysMmio2DisableDirtyPageTracing(pVM, pFirstRegMmio);
4160	}
4161	}
4162	else
4163	LogFlowFunc(("fEnabled=%RTbool %s - no change\n", fEnabled, pFirstRegMmio->RamRange.pszDesc));
4164
4165	return VINF_SUCCESS;
4166	}
4167
4168
4169	/**
4170	* Controls the dirty page tracking for an MMIO2 range.
4171	*
4172	* @returns VBox status code.
4173	* @param pVM The cross context VM structure.
4174	* @param pDevIns The device owning the MMIO2 memory.
4175	* @param hMmio2 The handle of the region.
4176	* @param fEnabled The new tracking state.
4177	*/
4178	VMMR3_INT_DECL(int) PGMR3PhysMmio2ControlDirtyPageTracking(PVM pVM, PPDMDEVINS pDevIns, PGMMMIO2HANDLE hMmio2, bool fEnabled)
4179	{
4180	/*
4181	* Do some basic validation before grapping the PGM lock and continuing.
4182	*/
4183	AssertPtrReturn(pDevIns, VERR_INVALID_POINTER);
4184	int rc = PGM_LOCK(pVM);
4185	if (RT_SUCCESS(rc))
4186	{
4187	rc = pgmR3PhysMmio2ControlDirtyPageTrackingLocked(pVM, pDevIns, hMmio2, fEnabled);
4188	PGM_UNLOCK(pVM);
4189	}
4190	return rc;
4191	}
4192
4193
4194	/**
4195	* Changes the region number of an MMIO2 region.
4196	*
4197	* This is only for dealing with save state issues, nothing else.
4198	*
4199	* @return VBox status code.
4200	*
4201	* @param pVM The cross context VM structure.
4202	* @param pDevIns The device owning the MMIO2 memory.
4203	* @param hMmio2 The handle of the region.
4204	* @param iNewRegion The new region index.
4205	*
4206	* @thread EMT(0)
4207	* @sa @bugref{9359}
4208	*/
4209	VMMR3_INT_DECL(int) PGMR3PhysMmio2ChangeRegionNo(PVM pVM, PPDMDEVINS pDevIns, PGMMMIO2HANDLE hMmio2, uint32_t iNewRegion)
4210	{
4211	/*
4212	* Validate input.
4213	*/
4214	VM_ASSERT_EMT0_RETURN(pVM, VERR_VM_THREAD_NOT_EMT);
4215	VM_ASSERT_STATE_RETURN(pVM, VMSTATE_LOADING, VERR_VM_INVALID_VM_STATE);
4216	AssertPtrReturn(pDevIns, VERR_INVALID_PARAMETER);
4217	AssertReturn(hMmio2 != NIL_PGMMMIO2HANDLE, VERR_INVALID_HANDLE);
4218	AssertReturn(iNewRegion <= UINT8_MAX, VERR_INVALID_PARAMETER);
4219
4220	AssertReturn(pVM->enmVMState == VMSTATE_LOADING, VERR_INVALID_STATE);
4221
4222	int rc = PGM_LOCK(pVM);
4223	AssertRCReturn(rc, rc);
4224
4225	PPGMREGMMIO2RANGE pFirstRegMmio = pgmR3PhysMmio2Find(pVM, pDevIns, UINT32_MAX, UINT32_MAX, hMmio2);
4226	AssertReturnStmt(pFirstRegMmio, PGM_UNLOCK(pVM), VERR_NOT_FOUND);
4227	AssertReturnStmt(pgmR3PhysMmio2Find(pVM, pDevIns, pFirstRegMmio->iSubDev, iNewRegion, NIL_PGMMMIO2HANDLE) == NULL,
4228	PGM_UNLOCK(pVM), VERR_RESOURCE_IN_USE);
4229
4230	/*
4231	* Make the change.
4232	*/
4233	pFirstRegMmio->iRegion = (uint8_t)iNewRegion;
4234
4235	PGM_UNLOCK(pVM);
4236	return VINF_SUCCESS;
4237	}
4238
4239
4240
4241	/*********************************************************************************************************************************
4242	* ROM *
4243	*********************************************************************************************************************************/
4244
4245	/**
4246	* Worker for PGMR3PhysRomRegister.
4247	*
4248	* This is here to simplify lock management, i.e. the caller does all the
4249	* locking and we can simply return without needing to remember to unlock
4250	* anything first.
4251	*
4252	* @returns VBox status code.
4253	* @param pVM The cross context VM structure.
4254	* @param pDevIns The device instance owning the ROM.
4255	* @param GCPhys First physical address in the range.
4256	* Must be page aligned!
4257	* @param cb The size of the range (in bytes).
4258	* Must be page aligned!
4259	* @param pvBinary Pointer to the binary data backing the ROM image.
4260	* @param cbBinary The size of the binary data pvBinary points to.
4261	* This must be less or equal to @a cb.
4262	* @param fFlags Mask of flags. PGMPHYS_ROM_FLAGS_SHADOWED
4263	* and/or PGMPHYS_ROM_FLAGS_PERMANENT_BINARY.
4264	* @param pszDesc Pointer to description string. This must not be freed.
4265	*/
4266	static int pgmR3PhysRomRegisterLocked(PVM pVM, PPDMDEVINS pDevIns, RTGCPHYS GCPhys, RTGCPHYS cb,
4267	const void pvBinary, uint32_t cbBinary, uint8_t fFlags, const char pszDesc)
4268	{
4269	/*
4270	* Validate input.
4271	*/
4272	AssertPtrReturn(pDevIns, VERR_INVALID_PARAMETER);
4273	AssertReturn(RT_ALIGN_T(GCPhys, GUEST_PAGE_SIZE, RTGCPHYS) == GCPhys, VERR_INVALID_PARAMETER);
4274	AssertReturn(RT_ALIGN_T(cb, GUEST_PAGE_SIZE, RTGCPHYS) == cb, VERR_INVALID_PARAMETER);
4275	RTGCPHYS GCPhysLast = GCPhys + (cb - 1);
4276	AssertReturn(GCPhysLast > GCPhys, VERR_INVALID_PARAMETER);
4277	AssertPtrReturn(pvBinary, VERR_INVALID_PARAMETER);
4278	AssertPtrReturn(pszDesc, VERR_INVALID_POINTER);
4279	AssertReturn(!(fFlags & ~PGMPHYS_ROM_FLAGS_VALID_MASK), VERR_INVALID_PARAMETER);
4280	VM_ASSERT_STATE_RETURN(pVM, VMSTATE_CREATING, VERR_VM_INVALID_VM_STATE);
4281
4282	const uint32_t cGuestPages = cb >> GUEST_PAGE_SHIFT;
4283	#ifdef VBOX_WITH_PGM_NEM_MODE
4284	const uint32_t cHostPages = RT_ALIGN_T(cb, HOST_PAGE_SIZE, RTGCPHYS) >> HOST_PAGE_SHIFT;
4285	#endif
4286
4287	/*
4288	* Find the ROM location in the ROM list first.
4289	*/
4290	PPGMROMRANGE pRomPrev = NULL;
4291	PPGMROMRANGE pRom = pVM->pgm.s.pRomRangesR3;
4292	while (pRom && GCPhysLast >= pRom->GCPhys)
4293	{
4294	if ( GCPhys <= pRom->GCPhysLast
4295	&& GCPhysLast >= pRom->GCPhys)
4296	AssertLogRelMsgFailedReturn(("%RGp-%RGp (%s) conflicts with existing %RGp-%RGp (%s)\n",
4297	GCPhys, GCPhysLast, pszDesc,
4298	pRom->GCPhys, pRom->GCPhysLast, pRom->pszDesc),
4299	VERR_PGM_RAM_CONFLICT);
4300	/* next */
4301	pRomPrev = pRom;
4302	pRom = pRom->pNextR3;
4303	}
4304
4305	/*
4306	* Find the RAM location and check for conflicts.
4307	*
4308	* Conflict detection is a bit different than for RAM registration since a
4309	* ROM can be located within a RAM range. So, what we have to check for is
4310	* other memory types (other than RAM that is) and that we don't span more
4311	* than one RAM range (lazy).
4312	*/
4313	bool fRamExists = false;
4314	PPGMRAMRANGE pRamPrev = NULL;
4315	PPGMRAMRANGE pRam = pVM->pgm.s.pRamRangesXR3;
4316	while (pRam && GCPhysLast >= pRam->GCPhys)
4317	{
4318	if ( GCPhys <= pRam->GCPhysLast
4319	&& GCPhysLast >= pRam->GCPhys)
4320	{
4321	/* completely within? */
4322	AssertLogRelMsgReturn( GCPhys >= pRam->GCPhys
4323	&& GCPhysLast <= pRam->GCPhysLast,
4324	("%RGp-%RGp (%s) falls partly outside %RGp-%RGp (%s)\n",
4325	GCPhys, GCPhysLast, pszDesc,
4326	pRam->GCPhys, pRam->GCPhysLast, pRam->pszDesc),
4327	VERR_PGM_RAM_CONFLICT);
4328	fRamExists = true;
4329	break;
4330	}
4331
4332	/* next */
4333	pRamPrev = pRam;
4334	pRam = pRam->pNextR3;
4335	}
4336	if (fRamExists)
4337	{
4338	PPGMPAGE pPage = &pRam->aPages[(GCPhys - pRam->GCPhys) >> GUEST_PAGE_SHIFT];
4339	uint32_t cPagesLeft = cGuestPages;
4340	while (cPagesLeft-- > 0)
4341	{
4342	AssertLogRelMsgReturn(PGM_PAGE_GET_TYPE(pPage) == PGMPAGETYPE_RAM,
4343	("%RGp (%R[pgmpage]) isn't a RAM page - registering %RGp-%RGp (%s).\n",
4344	pRam->GCPhys + ((RTGCPHYS)(uintptr_t)(pPage - &pRam->aPages[0]) << GUEST_PAGE_SHIFT),
4345	pPage, GCPhys, GCPhysLast, pszDesc), VERR_PGM_RAM_CONFLICT);
4346	Assert(PGM_PAGE_IS_ZERO(pPage) \|\| PGM_IS_IN_NEM_MODE(pVM));
4347	pPage++;
4348	}
4349	}
4350
4351	/*
4352	* Update the base memory reservation if necessary.
4353	*/
4354	uint32_t cExtraBaseCost = fRamExists ? 0 : cGuestPages;
4355	if (fFlags & PGMPHYS_ROM_FLAGS_SHADOWED)
4356	cExtraBaseCost += cGuestPages;
4357	if (cExtraBaseCost)
4358	{
4359	int rc = MMR3IncreaseBaseReservation(pVM, cExtraBaseCost);
4360	if (RT_FAILURE(rc))
4361	return rc;
4362	}
4363
4364	#ifdef VBOX_WITH_NATIVE_NEM
4365	/*
4366	* Early NEM notification before we've made any changes or anything.
4367	*/
4368	uint32_t const fNemNotify = (fRamExists ? NEM_NOTIFY_PHYS_ROM_F_REPLACE : 0)
4369	\| (fFlags & PGMPHYS_ROM_FLAGS_SHADOWED ? NEM_NOTIFY_PHYS_ROM_F_SHADOW : 0);
4370	uint8_t u2NemState = UINT8_MAX;
4371	uint32_t uNemRange = 0;
4372	if (VM_IS_NEM_ENABLED(pVM))
4373	{
4374	int rc = NEMR3NotifyPhysRomRegisterEarly(pVM, GCPhys, cGuestPages << GUEST_PAGE_SHIFT,
4375	fRamExists ? PGM_RAMRANGE_CALC_PAGE_R3PTR(pRam, GCPhys) : NULL,
4376	fNemNotify, &u2NemState, fRamExists ? &pRam->uNemRange : &uNemRange);
4377	AssertLogRelRCReturn(rc, rc);
4378	}
4379	#endif
4380
4381	/*
4382	* Allocate memory for the virgin copy of the RAM. In simplified memory mode,
4383	* we allocate memory for any ad-hoc RAM range and for shadow pages.
4384	*/
4385	PGMMALLOCATEPAGESREQ pReq = NULL;
4386	#ifdef VBOX_WITH_PGM_NEM_MODE
4387	void *pvRam = NULL;
4388	void *pvAlt = NULL;
4389	if (pVM->pgm.s.fNemMode)
4390	{
4391	if (!fRamExists)
4392	{
4393	int rc = SUPR3PageAlloc(cHostPages, 0, &pvRam);
4394	if (RT_FAILURE(rc))
4395	return rc;
4396	}
4397	if (fFlags & PGMPHYS_ROM_FLAGS_SHADOWED)
4398	{
4399	int rc = SUPR3PageAlloc(cHostPages, 0, &pvAlt);
4400	if (RT_FAILURE(rc))
4401	{
4402	if (pvRam)
4403	SUPR3PageFree(pvRam, cHostPages);
4404	return rc;
4405	}
4406	}
4407	}
4408	else
4409	#endif
4410	{
4411	int rc = GMMR3AllocatePagesPrepare(pVM, &pReq, cGuestPages, GMMACCOUNT_BASE);
4412	AssertRCReturn(rc, rc);
4413
4414	for (uint32_t iPage = 0; iPage < cGuestPages; iPage++)
4415	{
4416	pReq->aPages[iPage].HCPhysGCPhys = GCPhys + (iPage << GUEST_PAGE_SHIFT);
4417	pReq->aPages[iPage].fZeroed = false;
4418	pReq->aPages[iPage].idPage = NIL_GMM_PAGEID;
4419	pReq->aPages[iPage].idSharedPage = NIL_GMM_PAGEID;
4420	}
4421
4422	rc = GMMR3AllocatePagesPerform(pVM, pReq);
4423	if (RT_FAILURE(rc))
4424	{
4425	GMMR3AllocatePagesCleanup(pReq);
4426	return rc;
4427	}
4428	}
4429
4430	/*
4431	* Allocate the new ROM range and RAM range (if necessary).
4432	*/
4433	PPGMROMRANGE pRomNew = NULL;
4434	RTR0PTR pRomNewR0 = NIL_RTR0PTR;
4435	size_t const cbRomRange = RT_ALIGN_Z(RT_UOFFSETOF_DYN(PGMROMRANGE, aPages[cGuestPages]), 128);
4436	size_t const cbRamRange = fRamExists ? 0 : RT_UOFFSETOF_DYN(PGMROMRANGE, aPages[cGuestPages]);
4437	size_t const cRangePages = RT_ALIGN_Z(cbRomRange + cbRamRange, HOST_PAGE_SIZE) >> HOST_PAGE_SHIFT;
4438	int rc = SUPR3PageAllocEx(cRangePages, 0 /fFlags/, (void *)&pRomNew, &pRomNewR0, NULL /paPages*/);
4439	if (RT_SUCCESS(rc))
4440	{
4441
4442	/*
4443	* Initialize and insert the RAM range (if required).
4444	*/
4445	PPGMRAMRANGE pRamNew;
4446	uint32_t const idxFirstRamPage = fRamExists ? (GCPhys - pRam->GCPhys) >> GUEST_PAGE_SHIFT : 0;
4447	PPGMROMPAGE pRomPage = &pRomNew->aPages[0];
4448	if (!fRamExists)
4449	{
4450	/* New RAM range. */
4451	pRamNew = (PPGMRAMRANGE)((uintptr_t)pRomNew + cbRomRange);
4452	pRamNew->pSelfR0 = !pRomNewR0 ? NIL_RTR0PTR : pRomNewR0 + cbRomRange;
4453	pRamNew->GCPhys = GCPhys;
4454	pRamNew->GCPhysLast = GCPhysLast;
4455	pRamNew->cb = cb;
4456	pRamNew->pszDesc = pszDesc;
4457	pRamNew->fFlags = PGM_RAM_RANGE_FLAGS_AD_HOC_ROM;
4458	pRamNew->pvR3 = NULL;
4459	pRamNew->paLSPages = NULL;
4460	#ifdef VBOX_WITH_NATIVE_NEM
4461	pRamNew->uNemRange = uNemRange;
4462	#endif
4463
4464	PPGMPAGE pRamPage = &pRamNew->aPages[idxFirstRamPage];
4465	#ifdef VBOX_WITH_PGM_NEM_MODE
4466	if (pVM->pgm.s.fNemMode)
4467	{
4468	AssertPtr(pvRam); Assert(pReq == NULL);
4469	pRamNew->pvR3 = pvRam;
4470	for (uint32_t iPage = 0; iPage < cGuestPages; iPage++, pRamPage++, pRomPage++)
4471	{
4472	PGM_PAGE_INIT(pRamPage, UINT64_C(0x0000fffffffff000), NIL_GMM_PAGEID,
4473	PGMPAGETYPE_ROM, PGM_PAGE_STATE_ALLOCATED);
4474	pRomPage->Virgin = *pRamPage;
4475	}
4476	}
4477	else
4478	#endif
4479	for (uint32_t iPage = 0; iPage < cGuestPages; iPage++, pRamPage++, pRomPage++)
4480	{
4481	PGM_PAGE_INIT(pRamPage,
4482	pReq->aPages[iPage].HCPhysGCPhys,
4483	pReq->aPages[iPage].idPage,
4484	PGMPAGETYPE_ROM,
4485	PGM_PAGE_STATE_ALLOCATED);
4486
4487	pRomPage->Virgin = *pRamPage;
4488	}
4489
4490	pVM->pgm.s.cAllPages += cGuestPages;
4491	pVM->pgm.s.cPrivatePages += cGuestPages;
4492	pgmR3PhysLinkRamRange(pVM, pRamNew, pRamPrev);
4493	}
4494	else
4495	{
4496	/* Existing RAM range. */
4497	PPGMPAGE pRamPage = &pRam->aPages[idxFirstRamPage];
4498	#ifdef VBOX_WITH_PGM_NEM_MODE
4499	if (pVM->pgm.s.fNemMode)
4500	{
4501	Assert(pvRam == NULL); Assert(pReq == NULL);
4502	for (uint32_t iPage = 0; iPage < cGuestPages; iPage++, pRamPage++, pRomPage++)
4503	{
4504	Assert(PGM_PAGE_GET_HCPHYS(pRamPage) == UINT64_C(0x0000fffffffff000));
4505	Assert(PGM_PAGE_GET_PAGEID(pRamPage) == NIL_GMM_PAGEID);
4506	Assert(PGM_PAGE_GET_STATE(pRamPage) == PGM_PAGE_STATE_ALLOCATED);
4507	PGM_PAGE_SET_TYPE(pVM, pRamPage, PGMPAGETYPE_ROM);
4508	PGM_PAGE_SET_STATE(pVM, pRamPage, PGM_PAGE_STATE_ALLOCATED);
4509	PGM_PAGE_SET_PDE_TYPE(pVM, pRamPage, PGM_PAGE_PDE_TYPE_DONTCARE);
4510	PGM_PAGE_SET_PTE_INDEX(pVM, pRamPage, 0);
4511	PGM_PAGE_SET_TRACKING(pVM, pRamPage, 0);
4512
4513	pRomPage->Virgin = *pRamPage;
4514	}
4515	}
4516	else
4517	#endif
4518	{
4519	for (uint32_t iPage = 0; iPage < cGuestPages; iPage++, pRamPage++, pRomPage++)
4520	{
4521	PGM_PAGE_SET_TYPE(pVM, pRamPage, PGMPAGETYPE_ROM);
4522	PGM_PAGE_SET_HCPHYS(pVM, pRamPage, pReq->aPages[iPage].HCPhysGCPhys);
4523	PGM_PAGE_SET_STATE(pVM, pRamPage, PGM_PAGE_STATE_ALLOCATED);
4524	PGM_PAGE_SET_PAGEID(pVM, pRamPage, pReq->aPages[iPage].idPage);
4525	PGM_PAGE_SET_PDE_TYPE(pVM, pRamPage, PGM_PAGE_PDE_TYPE_DONTCARE);
4526	PGM_PAGE_SET_PTE_INDEX(pVM, pRamPage, 0);
4527	PGM_PAGE_SET_TRACKING(pVM, pRamPage, 0);
4528
4529	pRomPage->Virgin = *pRamPage;
4530	}
4531	pVM->pgm.s.cZeroPages -= cGuestPages;
4532	pVM->pgm.s.cPrivatePages += cGuestPages;
4533	}
4534	pRamNew = pRam;
4535	}
4536
4537	#ifdef VBOX_WITH_NATIVE_NEM
4538	/* Set the NEM state of the pages if needed. */
4539	if (u2NemState != UINT8_MAX)
4540	pgmPhysSetNemStateForPages(&pRamNew->aPages[idxFirstRamPage], cGuestPages, u2NemState);
4541	#endif
4542
4543	/* Flush physical page map TLB. */
4544	pgmPhysInvalidatePageMapTLB(pVM);
4545
4546	/*
4547	* Register the ROM access handler.
4548	*/
4549	rc = PGMHandlerPhysicalRegister(pVM, GCPhys, GCPhysLast, pVM->pgm.s.hRomPhysHandlerType, GCPhys, pszDesc);
4550	if (RT_SUCCESS(rc))
4551	{
4552	/*
4553	* Copy the image over to the virgin pages.
4554	* This must be done after linking in the RAM range.
4555	*/
4556	size_t cbBinaryLeft = cbBinary;
4557	PPGMPAGE pRamPage = &pRamNew->aPages[idxFirstRamPage];
4558	for (uint32_t iPage = 0; iPage < cGuestPages; iPage++, pRamPage++)
4559	{
4560	void *pvDstPage;
4561	rc = pgmPhysPageMap(pVM, pRamPage, GCPhys + (iPage << GUEST_PAGE_SHIFT), &pvDstPage);
4562	if (RT_FAILURE(rc))
4563	{
4564	VMSetError(pVM, rc, RT_SRC_POS, "Failed to map virgin ROM page at %RGp", GCPhys);
4565	break;
4566	}
4567	if (cbBinaryLeft >= GUEST_PAGE_SIZE)
4568	{
4569	memcpy(pvDstPage, (uint8_t const *)pvBinary + ((size_t)iPage << GUEST_PAGE_SHIFT), GUEST_PAGE_SIZE);
4570	cbBinaryLeft -= GUEST_PAGE_SIZE;
4571	}
4572	else
4573	{
4574	RT_BZERO(pvDstPage, GUEST_PAGE_SIZE); /* (shouldn't be necessary, but can't hurt either) */
4575	if (cbBinaryLeft > 0)
4576	{
4577	memcpy(pvDstPage, (uint8_t const *)pvBinary + ((size_t)iPage << GUEST_PAGE_SHIFT), cbBinaryLeft);
4578	cbBinaryLeft = 0;
4579	}
4580	}
4581	}
4582	if (RT_SUCCESS(rc))
4583	{
4584	/*
4585	* Initialize the ROM range.
4586	* Note that the Virgin member of the pages has already been initialized above.
4587	*/
4588	pRomNew->pSelfR0 = pRomNewR0;
4589	pRomNew->GCPhys = GCPhys;
4590	pRomNew->GCPhysLast = GCPhysLast;
4591	pRomNew->cb = cb;
4592	pRomNew->fFlags = fFlags;
4593	pRomNew->idSavedState = UINT8_MAX;
4594	pRomNew->cbOriginal = cbBinary;
4595	pRomNew->pszDesc = pszDesc;
4596	#ifdef VBOX_WITH_PGM_NEM_MODE
4597	pRomNew->pbR3Alternate = (uint8_t *)pvAlt;
4598	#endif
4599	pRomNew->pvOriginal = fFlags & PGMPHYS_ROM_FLAGS_PERMANENT_BINARY
4600	? pvBinary : RTMemDup(pvBinary, cbBinary);
4601	if (pRomNew->pvOriginal)
4602	{
4603	for (unsigned iPage = 0; iPage < cGuestPages; iPage++)
4604	{
4605	PPGMROMPAGE pPage = &pRomNew->aPages[iPage];
4606	pPage->enmProt = PGMROMPROT_READ_ROM_WRITE_IGNORE;
4607	#ifdef VBOX_WITH_PGM_NEM_MODE
4608	if (pVM->pgm.s.fNemMode)
4609	PGM_PAGE_INIT(&pPage->Shadow, UINT64_C(0x0000fffffffff000), NIL_GMM_PAGEID,
4610	PGMPAGETYPE_ROM_SHADOW, PGM_PAGE_STATE_ALLOCATED);
4611	else
4612	#endif
4613	PGM_PAGE_INIT_ZERO(&pPage->Shadow, pVM, PGMPAGETYPE_ROM_SHADOW);
4614	}
4615
4616	/* update the page count stats for the shadow pages. */
4617	if (fFlags & PGMPHYS_ROM_FLAGS_SHADOWED)
4618	{
4619	#ifdef VBOX_WITH_PGM_NEM_MODE
4620	if (pVM->pgm.s.fNemMode)
4621	pVM->pgm.s.cPrivatePages += cGuestPages;
4622	else
4623	#endif
4624	pVM->pgm.s.cZeroPages += cGuestPages;
4625	pVM->pgm.s.cAllPages += cGuestPages;
4626	}
4627
4628	/*
4629	* Insert the ROM range, tell REM and return successfully.
4630	*/
4631	pRomNew->pNextR3 = pRom;
4632	pRomNew->pNextR0 = pRom ? pRom->pSelfR0 : NIL_RTR0PTR;
4633
4634	if (pRomPrev)
4635	{
4636	pRomPrev->pNextR3 = pRomNew;
4637	pRomPrev->pNextR0 = pRomNew->pSelfR0;
4638	}
4639	else
4640	{
4641	pVM->pgm.s.pRomRangesR3 = pRomNew;
4642	pVM->pgm.s.pRomRangesR0 = pRomNew->pSelfR0;
4643	}
4644
4645	pgmPhysInvalidatePageMapTLB(pVM);
4646	#ifdef VBOX_WITH_PGM_NEM_MODE
4647	if (!pVM->pgm.s.fNemMode)
4648	#endif
4649	GMMR3AllocatePagesCleanup(pReq);
4650
4651	#ifdef VBOX_WITH_NATIVE_NEM
4652	/*
4653	* Notify NEM again.
4654	*/
4655	if (VM_IS_NEM_ENABLED(pVM))
4656	{
4657	u2NemState = UINT8_MAX;
4658	rc = NEMR3NotifyPhysRomRegisterLate(pVM, GCPhys, cb, PGM_RAMRANGE_CALC_PAGE_R3PTR(pRamNew, GCPhys),
4659	fNemNotify, &u2NemState,
4660	fRamExists ? &pRam->uNemRange : &pRamNew->uNemRange);
4661	if (u2NemState != UINT8_MAX)
4662	pgmPhysSetNemStateForPages(&pRamNew->aPages[idxFirstRamPage], cGuestPages, u2NemState);
4663	if (RT_SUCCESS(rc))
4664	return rc;
4665	}
4666	else
4667	#endif
4668	return rc;
4669
4670	/*
4671	* bail out
4672	*/
4673	#ifdef VBOX_WITH_NATIVE_NEM
4674	/* unlink */
4675	if (pRomPrev)
4676	{
4677	pRomPrev->pNextR3 = pRom;
4678	pRomPrev->pNextR0 = pRom ? pRom->pSelfR0 : NIL_RTR0PTR;
4679	}
4680	else
4681	{
4682	pVM->pgm.s.pRomRangesR3 = pRom;
4683	pVM->pgm.s.pRomRangesR0 = pRom ? pRom->pSelfR0 : NIL_RTR0PTR;
4684	}
4685
4686	if (fFlags & PGMPHYS_ROM_FLAGS_SHADOWED)
4687	{
4688	# ifdef VBOX_WITH_PGM_NEM_MODE
4689	if (pVM->pgm.s.fNemMode)
4690	pVM->pgm.s.cPrivatePages -= cGuestPages;
4691	else
4692	# endif
4693	pVM->pgm.s.cZeroPages -= cGuestPages;
4694	pVM->pgm.s.cAllPages -= cGuestPages;
4695	}
4696	#endif
4697	}
4698	else
4699	rc = VERR_NO_MEMORY;
4700	}
4701
4702	int rc2 = PGMHandlerPhysicalDeregister(pVM, GCPhys);
4703	AssertRC(rc2);
4704	}
4705
4706	if (!fRamExists)
4707	pgmR3PhysUnlinkRamRange2(pVM, pRamNew, pRamPrev);
4708	else
4709	{
4710	PPGMPAGE pRamPage = &pRam->aPages[idxFirstRamPage];
4711	#ifdef VBOX_WITH_PGM_NEM_MODE
4712	if (pVM->pgm.s.fNemMode)
4713	{
4714	Assert(pvRam == NULL); Assert(pReq == NULL);
4715	for (uint32_t iPage = 0; iPage < cGuestPages; iPage++, pRamPage++, pRomPage++)
4716	{
4717	Assert(PGM_PAGE_GET_HCPHYS(pRamPage) == UINT64_C(0x0000fffffffff000));
4718	Assert(PGM_PAGE_GET_PAGEID(pRamPage) == NIL_GMM_PAGEID);
4719	Assert(PGM_PAGE_GET_STATE(pRamPage) == PGM_PAGE_STATE_ALLOCATED);
4720	PGM_PAGE_SET_TYPE(pVM, pRamPage, PGMPAGETYPE_RAM);
4721	PGM_PAGE_SET_STATE(pVM, pRamPage, PGM_PAGE_STATE_ALLOCATED);
4722	}
4723	}
4724	else
4725	#endif
4726	{
4727	for (uint32_t iPage = 0; iPage < cGuestPages; iPage++, pRamPage++)
4728	PGM_PAGE_INIT_ZERO(pRamPage, pVM, PGMPAGETYPE_RAM);
4729	pVM->pgm.s.cZeroPages += cGuestPages;
4730	pVM->pgm.s.cPrivatePages -= cGuestPages;
4731	}
4732	}
4733
4734	SUPR3PageFreeEx(pRomNew, cRangePages);
4735	}
4736
4737	/** @todo Purge the mapping cache or something... */
4738	#ifdef VBOX_WITH_PGM_NEM_MODE
4739	if (pVM->pgm.s.fNemMode)
4740	{
4741	Assert(!pReq);
4742	if (pvRam)
4743	SUPR3PageFree(pvRam, cHostPages);
4744	if (pvAlt)
4745	SUPR3PageFree(pvAlt, cHostPages);
4746	}
4747	else
4748	#endif
4749	{
4750	GMMR3FreeAllocatedPages(pVM, pReq);
4751	GMMR3AllocatePagesCleanup(pReq);
4752	}
4753	return rc;
4754	}
4755
4756
4757	/**
4758	* Registers a ROM image.
4759	*
4760	* Shadowed ROM images requires double the amount of backing memory, so,
4761	* don't use that unless you have to. Shadowing of ROM images is process
4762	* where we can select where the reads go and where the writes go. On real
4763	* hardware the chipset provides means to configure this. We provide
4764	* PGMR3PhysProtectROM() for this purpose.
4765	*
4766	* A read-only copy of the ROM image will always be kept around while we
4767	* will allocate RAM pages for the changes on demand (unless all memory
4768	* is configured to be preallocated).
4769	*
4770	* @returns VBox status code.
4771	* @param pVM The cross context VM structure.
4772	* @param pDevIns The device instance owning the ROM.
4773	* @param GCPhys First physical address in the range.
4774	* Must be page aligned!
4775	* @param cb The size of the range (in bytes).
4776	* Must be page aligned!
4777	* @param pvBinary Pointer to the binary data backing the ROM image.
4778	* @param cbBinary The size of the binary data pvBinary points to.
4779	* This must be less or equal to @a cb.
4780	* @param fFlags Mask of flags, PGMPHYS_ROM_FLAGS_XXX.
4781	* @param pszDesc Pointer to description string. This must not be freed.
4782	*
4783	* @remark There is no way to remove the rom, automatically on device cleanup or
4784	* manually from the device yet. This isn't difficult in any way, it's
4785	* just not something we expect to be necessary for a while.
4786	*/
4787	VMMR3DECL(int) PGMR3PhysRomRegister(PVM pVM, PPDMDEVINS pDevIns, RTGCPHYS GCPhys, RTGCPHYS cb,
4788	const void pvBinary, uint32_t cbBinary, uint8_t fFlags, const char pszDesc)
4789	{
4790	Log(("PGMR3PhysRomRegister: pDevIns=%p GCPhys=%RGp(-%RGp) cb=%RGp pvBinary=%p cbBinary=%#x fFlags=%#x pszDesc=%s\n",
4791	pDevIns, GCPhys, GCPhys + cb, cb, pvBinary, cbBinary, fFlags, pszDesc));
4792	PGM_LOCK_VOID(pVM);
4793	int rc = pgmR3PhysRomRegisterLocked(pVM, pDevIns, GCPhys, cb, pvBinary, cbBinary, fFlags, pszDesc);
4794	PGM_UNLOCK(pVM);
4795	return rc;
4796	}
4797
4798
4799	/**
4800	* Called by PGMR3MemSetup to reset the shadow, switch to the virgin, and verify
4801	* that the virgin part is untouched.
4802	*
4803	* This is done after the normal memory has been cleared.
4804	*
4805	* ASSUMES that the caller owns the PGM lock.
4806	*
4807	* @param pVM The cross context VM structure.
4808	*/
4809	int pgmR3PhysRomReset(PVM pVM)
4810	{
4811	PGM_LOCK_ASSERT_OWNER(pVM);
4812	for (PPGMROMRANGE pRom = pVM->pgm.s.pRomRangesR3; pRom; pRom = pRom->pNextR3)
4813	{
4814	const uint32_t cGuestPages = pRom->cb >> GUEST_PAGE_SHIFT;
4815
4816	if (pRom->fFlags & PGMPHYS_ROM_FLAGS_SHADOWED)
4817	{
4818	/*
4819	* Reset the physical handler.
4820	*/
4821	int rc = PGMR3PhysRomProtect(pVM, pRom->GCPhys, pRom->cb, PGMROMPROT_READ_ROM_WRITE_IGNORE);
4822	AssertRCReturn(rc, rc);
4823
4824	/*
4825	* What we do with the shadow pages depends on the memory
4826	* preallocation option. If not enabled, we'll just throw
4827	* out all the dirty pages and replace them by the zero page.
4828	*/
4829	#ifdef VBOX_WITH_PGM_NEM_MODE
4830	if (pVM->pgm.s.fNemMode)
4831	{
4832	/* Clear all the shadow pages (currently using alternate backing). */
4833	RT_BZERO(pRom->pbR3Alternate, pRom->cb);
4834	}
4835	else
4836	#endif
4837	if (!pVM->pgm.s.fRamPreAlloc)
4838	{
4839	/* Free the dirty pages. */
4840	uint32_t cPendingPages = 0;
4841	PGMMFREEPAGESREQ pReq;
4842	rc = GMMR3FreePagesPrepare(pVM, &pReq, PGMPHYS_FREE_PAGE_BATCH_SIZE, GMMACCOUNT_BASE);
4843	AssertRCReturn(rc, rc);
4844
4845	for (uint32_t iPage = 0; iPage < cGuestPages; iPage++)
4846	if ( !PGM_PAGE_IS_ZERO(&pRom->aPages[iPage].Shadow)
4847	&& !PGM_PAGE_IS_BALLOONED(&pRom->aPages[iPage].Shadow))
4848	{
4849	Assert(PGM_PAGE_GET_STATE(&pRom->aPages[iPage].Shadow) == PGM_PAGE_STATE_ALLOCATED);
4850	rc = pgmPhysFreePage(pVM, pReq, &cPendingPages, &pRom->aPages[iPage].Shadow,
4851	pRom->GCPhys + (iPage << GUEST_PAGE_SHIFT),
4852	(PGMPAGETYPE)PGM_PAGE_GET_TYPE(&pRom->aPages[iPage].Shadow));
4853	AssertLogRelRCReturn(rc, rc);
4854	}
4855
4856	if (cPendingPages)
4857	{
4858	rc = GMMR3FreePagesPerform(pVM, pReq, cPendingPages);
4859	AssertLogRelRCReturn(rc, rc);
4860	}
4861	GMMR3FreePagesCleanup(pReq);
4862	}
4863	else
4864	{
4865	/* clear all the shadow pages. */
4866	for (uint32_t iPage = 0; iPage < cGuestPages; iPage++)
4867	{
4868	if (PGM_PAGE_IS_ZERO(&pRom->aPages[iPage].Shadow))
4869	continue;
4870	Assert(!PGM_PAGE_IS_BALLOONED(&pRom->aPages[iPage].Shadow));
4871	void *pvDstPage;
4872	const RTGCPHYS GCPhys = pRom->GCPhys + (iPage << GUEST_PAGE_SHIFT);
4873	rc = pgmPhysPageMakeWritableAndMap(pVM, &pRom->aPages[iPage].Shadow, GCPhys, &pvDstPage);
4874	if (RT_FAILURE(rc))
4875	break;
4876	RT_BZERO(pvDstPage, GUEST_PAGE_SIZE);
4877	}
4878	AssertRCReturn(rc, rc);
4879	}
4880	}
4881
4882	/*
4883	* Restore the original ROM pages after a saved state load.
4884	* Also, in strict builds check that ROM pages remain unmodified.
4885	*/
4886	#ifndef VBOX_STRICT
4887	if (pVM->pgm.s.fRestoreRomPagesOnReset)
4888	#endif
4889	{
4890	size_t cbSrcLeft = pRom->cbOriginal;
4891	uint8_t const pbSrcPage = (uint8_t const )pRom->pvOriginal;
4892	uint32_t cRestored = 0;
4893	for (uint32_t iPage = 0; iPage < cGuestPages && cbSrcLeft > 0; iPage++, pbSrcPage += GUEST_PAGE_SIZE)
4894	{
4895	const RTGCPHYS GCPhys = pRom->GCPhys + (iPage << GUEST_PAGE_SHIFT);
4896	PPGMPAGE const pPage = pgmPhysGetPage(pVM, GCPhys);
4897	void const *pvDstPage = NULL;
4898	int rc = pgmPhysPageMapReadOnly(pVM, pPage, GCPhys, &pvDstPage);
4899	if (RT_FAILURE(rc))
4900	break;
4901
4902	if (memcmp(pvDstPage, pbSrcPage, RT_MIN(cbSrcLeft, GUEST_PAGE_SIZE)))
4903	{
4904	if (pVM->pgm.s.fRestoreRomPagesOnReset)
4905	{
4906	void *pvDstPageW = NULL;
4907	rc = pgmPhysPageMap(pVM, pPage, GCPhys, &pvDstPageW);
4908	AssertLogRelRCReturn(rc, rc);
4909	memcpy(pvDstPageW, pbSrcPage, RT_MIN(cbSrcLeft, GUEST_PAGE_SIZE));
4910	cRestored++;
4911	}
4912	else
4913	LogRel(("pgmR3PhysRomReset: %RGp: ROM page changed (%s)\n", GCPhys, pRom->pszDesc));
4914	}
4915	cbSrcLeft -= RT_MIN(cbSrcLeft, GUEST_PAGE_SIZE);
4916	}
4917	if (cRestored > 0)
4918	LogRel(("PGM: ROM \"%s\": Reloaded %u of %u pages.\n", pRom->pszDesc, cRestored, cGuestPages));
4919	}
4920	}
4921
4922	/* Clear the ROM restore flag now as we only need to do this once after
4923	loading saved state. */
4924	pVM->pgm.s.fRestoreRomPagesOnReset = false;
4925
4926	return VINF_SUCCESS;
4927	}
4928
4929
4930	/**
4931	* Called by PGMR3Term to free resources.
4932	*
4933	* ASSUMES that the caller owns the PGM lock.
4934	*
4935	* @param pVM The cross context VM structure.
4936	*/
4937	void pgmR3PhysRomTerm(PVM pVM)
4938	{
4939	/*
4940	* Free the heap copy of the original bits.
4941	*/
4942	for (PPGMROMRANGE pRom = pVM->pgm.s.pRomRangesR3; pRom; pRom = pRom->pNextR3)
4943	{
4944	if ( pRom->pvOriginal
4945	&& !(pRom->fFlags & PGMPHYS_ROM_FLAGS_PERMANENT_BINARY))
4946	{
4947	RTMemFree((void *)pRom->pvOriginal);
4948	pRom->pvOriginal = NULL;
4949	}
4950	}
4951	}
4952
4953
4954	/**
4955	* Change the shadowing of a range of ROM pages.
4956	*
4957	* This is intended for implementing chipset specific memory registers
4958	* and will not be very strict about the input. It will silently ignore
4959	* any pages that are not the part of a shadowed ROM.
4960	*
4961	* @returns VBox status code.
4962	* @retval VINF_PGM_SYNC_CR3
4963	*
4964	* @param pVM The cross context VM structure.
4965	* @param GCPhys Where to start. Page aligned.
4966	* @param cb How much to change. Page aligned.
4967	* @param enmProt The new ROM protection.
4968	*/
4969	VMMR3DECL(int) PGMR3PhysRomProtect(PVM pVM, RTGCPHYS GCPhys, RTGCPHYS cb, PGMROMPROT enmProt)
4970	{
4971	LogFlow(("PGMR3PhysRomProtect: GCPhys=%RGp cb=%RGp enmProt=%d\n", GCPhys, cb, enmProt));
4972
4973	/*
4974	* Check input
4975	*/
4976	if (!cb)
4977	return VINF_SUCCESS;
4978	AssertReturn(!(GCPhys & GUEST_PAGE_OFFSET_MASK), VERR_INVALID_PARAMETER);
4979	AssertReturn(!(cb & GUEST_PAGE_OFFSET_MASK), VERR_INVALID_PARAMETER);
4980	RTGCPHYS GCPhysLast = GCPhys + (cb - 1);
4981	AssertReturn(GCPhysLast > GCPhys, VERR_INVALID_PARAMETER);
4982	AssertReturn(enmProt >= PGMROMPROT_INVALID && enmProt <= PGMROMPROT_END, VERR_INVALID_PARAMETER);
4983
4984	/*
4985	* Process the request.
4986	*/
4987	PGM_LOCK_VOID(pVM);
4988	int rc = VINF_SUCCESS;
4989	bool fFlushTLB = false;
4990	for (PPGMROMRANGE pRom = pVM->pgm.s.pRomRangesR3; pRom; pRom = pRom->pNextR3)
4991	{
4992	if ( GCPhys <= pRom->GCPhysLast
4993	&& GCPhysLast >= pRom->GCPhys
4994	&& (pRom->fFlags & PGMPHYS_ROM_FLAGS_SHADOWED))
4995	{
4996	/*
4997	* Iterate the relevant pages and make necessary the changes.
4998	*/
4999	#ifdef VBOX_WITH_NATIVE_NEM
5000	PPGMRAMRANGE const pRam = pgmPhysGetRange(pVM, GCPhys);
5001	AssertPtrReturn(pRam, VERR_INTERNAL_ERROR_3);
5002	#endif
5003	bool fChanges = false;
5004	uint32_t const cPages = pRom->GCPhysLast <= GCPhysLast
5005	? pRom->cb >> GUEST_PAGE_SHIFT
5006	: (GCPhysLast - pRom->GCPhys + 1) >> GUEST_PAGE_SHIFT;
5007	for (uint32_t iPage = (GCPhys - pRom->GCPhys) >> GUEST_PAGE_SHIFT;
5008	iPage < cPages;
5009	iPage++)
5010	{
5011	PPGMROMPAGE pRomPage = &pRom->aPages[iPage];
5012	if (PGMROMPROT_IS_ROM(pRomPage->enmProt) != PGMROMPROT_IS_ROM(enmProt))
5013	{
5014	fChanges = true;
5015
5016	/* flush references to the page. */
5017	RTGCPHYS const GCPhysPage = pRom->GCPhys + (iPage << GUEST_PAGE_SHIFT);
5018	PPGMPAGE pRamPage = pgmPhysGetPage(pVM, GCPhysPage);
5019	int rc2 = pgmPoolTrackUpdateGCPhys(pVM, GCPhysPage, pRamPage, true /fFlushPTEs/, &fFlushTLB);
5020	if (rc2 != VINF_SUCCESS && (rc == VINF_SUCCESS \|\| RT_FAILURE(rc2)))
5021	rc = rc2;
5022	#ifdef VBOX_WITH_NATIVE_NEM
5023	uint8_t u2State = PGM_PAGE_GET_NEM_STATE(pRamPage);
5024	#endif
5025
5026	PPGMPAGE pOld = PGMROMPROT_IS_ROM(pRomPage->enmProt) ? &pRomPage->Virgin : &pRomPage->Shadow;
5027	PPGMPAGE pNew = PGMROMPROT_IS_ROM(pRomPage->enmProt) ? &pRomPage->Shadow : &pRomPage->Virgin;
5028
5029	pOld = pRamPage;
5030	pRamPage = pNew;
5031	/** @todo preserve the volatile flags (handlers) when these have been moved out of HCPhys! */
5032
5033	#ifdef VBOX_WITH_NATIVE_NEM
5034	# ifdef VBOX_WITH_PGM_NEM_MODE
5035	/* In simplified mode we have to switch the page data around too. */
5036	if (pVM->pgm.s.fNemMode)
5037	{
5038	uint8_t abPage[GUEST_PAGE_SIZE];
5039	uint8_t * const pbRamPage = PGM_RAMRANGE_CALC_PAGE_R3PTR(pRam, GCPhysPage);
5040	memcpy(abPage, &pRom->pbR3Alternate[(size_t)iPage << GUEST_PAGE_SHIFT], sizeof(abPage));
5041	memcpy(&pRom->pbR3Alternate[(size_t)iPage << GUEST_PAGE_SHIFT], pbRamPage, sizeof(abPage));
5042	memcpy(pbRamPage, abPage, sizeof(abPage));
5043	}
5044	# endif
5045	/* Tell NEM about the backing and protection change. */
5046	if (VM_IS_NEM_ENABLED(pVM))
5047	{
5048	PGMPAGETYPE enmType = (PGMPAGETYPE)PGM_PAGE_GET_TYPE(pNew);
5049	NEMHCNotifyPhysPageChanged(pVM, GCPhys, PGM_PAGE_GET_HCPHYS(pOld), PGM_PAGE_GET_HCPHYS(pNew),
5050	PGM_RAMRANGE_CALC_PAGE_R3PTR(pRam, GCPhysPage),
5051	pgmPhysPageCalcNemProtection(pRamPage, enmType), enmType, &u2State);
5052	PGM_PAGE_SET_NEM_STATE(pRamPage, u2State);
5053	}
5054	#endif
5055	}
5056	pRomPage->enmProt = enmProt;
5057	}
5058
5059	/*
5060	* Reset the access handler if we made changes, no need to optimize this.
5061	*/
5062	if (fChanges)
5063	{
5064	int rc2 = PGMHandlerPhysicalReset(pVM, pRom->GCPhys);
5065	if (RT_FAILURE(rc2))
5066	{
5067	PGM_UNLOCK(pVM);
5068	AssertRC(rc);
5069	return rc2;
5070	}
5071
5072	/* Explicitly flush IEM. Not sure if this is really necessary, but better
5073	be on the safe side. This shouldn't be a high volume flush source. */
5074	IEMTlbInvalidateAllPhysicalAllCpus(pVM, NIL_VMCPUID, IEMTLBPHYSFLUSHREASON_ROM_PROTECT);
5075	}
5076
5077	/* Advance - cb isn't updated. */
5078	GCPhys = pRom->GCPhys + (cPages << GUEST_PAGE_SHIFT);
5079	}
5080	}
5081	PGM_UNLOCK(pVM);
5082	if (fFlushTLB)
5083	PGM_INVL_ALL_VCPU_TLBS(pVM);
5084
5085	return rc;
5086	}
5087
5088
5089
5090	/*********************************************************************************************************************************
5091	* Ballooning *
5092	*********************************************************************************************************************************/
5093
5094	#if HC_ARCH_BITS == 64 && (defined(RT_OS_WINDOWS) \|\| defined(RT_OS_SOLARIS) \|\| defined(RT_OS_LINUX) \|\| defined(RT_OS_FREEBSD))
5095
5096	/**
5097	* Rendezvous callback used by PGMR3ChangeMemBalloon that changes the memory balloon size
5098	*
5099	* This is only called on one of the EMTs while the other ones are waiting for
5100	* it to complete this function.
5101	*
5102	* @returns VINF_SUCCESS (VBox strict status code).
5103	* @param pVM The cross context VM structure.
5104	* @param pVCpu The cross context virtual CPU structure of the calling EMT. Unused.
5105	* @param pvUser User parameter
5106	*/
5107	static DECLCALLBACK(VBOXSTRICTRC) pgmR3PhysChangeMemBalloonRendezvous(PVM pVM, PVMCPU pVCpu, void *pvUser)
5108	{
5109	uintptr_t paUser = (uintptr_t )pvUser;
5110	bool fInflate = !!paUser[0];
5111	unsigned cPages = paUser[1];
5112	RTGCPHYS paPhysPage = (RTGCPHYS )paUser[2];
5113	uint32_t cPendingPages = 0;
5114	PGMMFREEPAGESREQ pReq;
5115	int rc;
5116
5117	Log(("pgmR3PhysChangeMemBalloonRendezvous: %s %x pages\n", (fInflate) ? "inflate" : "deflate", cPages));
5118	PGM_LOCK_VOID(pVM);
5119
5120	if (fInflate)
5121	{
5122	/* Flush the PGM pool cache as we might have stale references to pages that we just freed. */
5123	pgmR3PoolClearAllRendezvous(pVM, pVCpu, NULL);
5124
5125	/* Replace pages with ZERO pages. */
5126	rc = GMMR3FreePagesPrepare(pVM, &pReq, PGMPHYS_FREE_PAGE_BATCH_SIZE, GMMACCOUNT_BASE);
5127	if (RT_FAILURE(rc))
5128	{
5129	PGM_UNLOCK(pVM);
5130	AssertLogRelRC(rc);
5131	return rc;
5132	}
5133
5134	/* Iterate the pages. */
5135	for (unsigned i = 0; i < cPages; i++)
5136	{
5137	PPGMPAGE pPage = pgmPhysGetPage(pVM, paPhysPage[i]);
5138	if ( pPage == NULL
5139	\|\| PGM_PAGE_GET_TYPE(pPage) != PGMPAGETYPE_RAM)
5140	{
5141	Log(("pgmR3PhysChangeMemBalloonRendezvous: invalid physical page %RGp pPage->u3Type=%d\n", paPhysPage[i], pPage ? PGM_PAGE_GET_TYPE(pPage) : 0));
5142	break;
5143	}
5144
5145	LogFlow(("balloon page: %RGp\n", paPhysPage[i]));
5146
5147	/* Flush the shadow PT if this page was previously used as a guest page table. */
5148	pgmPoolFlushPageByGCPhys(pVM, paPhysPage[i]);
5149
5150	rc = pgmPhysFreePage(pVM, pReq, &cPendingPages, pPage, paPhysPage[i], (PGMPAGETYPE)PGM_PAGE_GET_TYPE(pPage));
5151	if (RT_FAILURE(rc))
5152	{
5153	PGM_UNLOCK(pVM);
5154	AssertLogRelRC(rc);
5155	return rc;
5156	}
5157	Assert(PGM_PAGE_IS_ZERO(pPage));
5158	PGM_PAGE_SET_STATE(pVM, pPage, PGM_PAGE_STATE_BALLOONED);
5159	}
5160
5161	if (cPendingPages)
5162	{
5163	rc = GMMR3FreePagesPerform(pVM, pReq, cPendingPages);
5164	if (RT_FAILURE(rc))
5165	{
5166	PGM_UNLOCK(pVM);
5167	AssertLogRelRC(rc);
5168	return rc;
5169	}
5170	}
5171	GMMR3FreePagesCleanup(pReq);
5172	}
5173	else
5174	{
5175	/* Iterate the pages. */
5176	for (unsigned i = 0; i < cPages; i++)
5177	{
5178	PPGMPAGE pPage = pgmPhysGetPage(pVM, paPhysPage[i]);
5179	AssertBreak(pPage && PGM_PAGE_GET_TYPE(pPage) == PGMPAGETYPE_RAM);
5180
5181	LogFlow(("Free ballooned page: %RGp\n", paPhysPage[i]));
5182
5183	Assert(PGM_PAGE_IS_BALLOONED(pPage));
5184
5185	/* Change back to zero page. (NEM does not need to be informed.) */
5186	PGM_PAGE_SET_STATE(pVM, pPage, PGM_PAGE_STATE_ZERO);
5187	}
5188
5189	/* Note that we currently do not map any ballooned pages in our shadow page tables, so no need to flush the pgm pool. */
5190	}
5191
5192	/* Notify GMM about the balloon change. */
5193	rc = GMMR3BalloonedPages(pVM, (fInflate) ? GMMBALLOONACTION_INFLATE : GMMBALLOONACTION_DEFLATE, cPages);
5194	if (RT_SUCCESS(rc))
5195	{
5196	if (!fInflate)
5197	{
5198	Assert(pVM->pgm.s.cBalloonedPages >= cPages);
5199	pVM->pgm.s.cBalloonedPages -= cPages;
5200	}
5201	else
5202	pVM->pgm.s.cBalloonedPages += cPages;
5203	}
5204
5205	PGM_UNLOCK(pVM);
5206
5207	/* Flush the recompiler's TLB as well. */
5208	for (VMCPUID i = 0; i < pVM->cCpus; i++)
5209	CPUMSetChangedFlags(pVM->apCpusR3[i], CPUM_CHANGED_GLOBAL_TLB_FLUSH);
5210
5211	AssertLogRelRC(rc);
5212	return rc;
5213	}
5214
5215
5216	/**
5217	* Frees a range of ram pages, replacing them with ZERO pages; helper for PGMR3PhysFreeRamPages
5218	*
5219	* @param pVM The cross context VM structure.
5220	* @param fInflate Inflate or deflate memory balloon
5221	* @param cPages Number of pages to free
5222	* @param paPhysPage Array of guest physical addresses
5223	*/
5224	static DECLCALLBACK(void) pgmR3PhysChangeMemBalloonHelper(PVM pVM, bool fInflate, unsigned cPages, RTGCPHYS *paPhysPage)
5225	{
5226	uintptr_t paUser[3];
5227
5228	paUser[0] = fInflate;
5229	paUser[1] = cPages;
5230	paUser[2] = (uintptr_t)paPhysPage;
5231	int rc = VMMR3EmtRendezvous(pVM, VMMEMTRENDEZVOUS_FLAGS_TYPE_ONCE, pgmR3PhysChangeMemBalloonRendezvous, (void *)paUser);
5232	AssertRC(rc);
5233
5234	/* Made a copy in PGMR3PhysFreeRamPages; free it here. */
5235	RTMemFree(paPhysPage);
5236	}
5237
5238	#endif /* 64-bit host && (Windows \|\| Solaris \|\| Linux \|\| FreeBSD) */
5239
5240	/**
5241	* Inflate or deflate a memory balloon
5242	*
5243	* @returns VBox status code.
5244	* @param pVM The cross context VM structure.
5245	* @param fInflate Inflate or deflate memory balloon
5246	* @param cPages Number of pages to free
5247	* @param paPhysPage Array of guest physical addresses
5248	*/
5249	VMMR3DECL(int) PGMR3PhysChangeMemBalloon(PVM pVM, bool fInflate, unsigned cPages, RTGCPHYS *paPhysPage)
5250	{
5251	/* This must match GMMR0Init; currently we only support memory ballooning on all 64-bit hosts except Mac OS X */
5252	#if HC_ARCH_BITS == 64 && (defined(RT_OS_WINDOWS) \|\| defined(RT_OS_SOLARIS) \|\| defined(RT_OS_LINUX) \|\| defined(RT_OS_FREEBSD))
5253	int rc;
5254
5255	/* Older additions (ancient non-functioning balloon code) pass wrong physical addresses. */
5256	AssertReturn(!(paPhysPage[0] & 0xfff), VERR_INVALID_PARAMETER);
5257
5258	/* We own the IOM lock here and could cause a deadlock by waiting for another VCPU that is blocking on the IOM lock.
5259	* In the SMP case we post a request packet to postpone the job.
5260	*/
5261	if (pVM->cCpus > 1)
5262	{
5263	unsigned cbPhysPage = cPages * sizeof(paPhysPage[0]);
5264	RTGCPHYS paPhysPageCopy = (RTGCPHYS )RTMemAlloc(cbPhysPage);
5265	AssertReturn(paPhysPageCopy, VERR_NO_MEMORY);
5266
5267	memcpy(paPhysPageCopy, paPhysPage, cbPhysPage);
5268
5269	rc = VMR3ReqCallNoWait(pVM, VMCPUID_ANY_QUEUE, (PFNRT)pgmR3PhysChangeMemBalloonHelper, 4, pVM, fInflate, cPages, paPhysPageCopy);
5270	AssertRC(rc);
5271	}
5272	else
5273	{
5274	uintptr_t paUser[3];
5275
5276	paUser[0] = fInflate;
5277	paUser[1] = cPages;
5278	paUser[2] = (uintptr_t)paPhysPage;
5279	rc = VMMR3EmtRendezvous(pVM, VMMEMTRENDEZVOUS_FLAGS_TYPE_ONCE, pgmR3PhysChangeMemBalloonRendezvous, (void *)paUser);
5280	AssertRC(rc);
5281	}
5282	return rc;
5283
5284	#else
5285	NOREF(pVM); NOREF(fInflate); NOREF(cPages); NOREF(paPhysPage);
5286	return VERR_NOT_IMPLEMENTED;
5287	#endif
5288	}
5289
5290
5291	/*********************************************************************************************************************************
5292	* Write Monitoring *
5293	*********************************************************************************************************************************/
5294
5295	/**
5296	* Rendezvous callback used by PGMR3WriteProtectRAM that write protects all
5297	* physical RAM.
5298	*
5299	* This is only called on one of the EMTs while the other ones are waiting for
5300	* it to complete this function.
5301	*
5302	* @returns VINF_SUCCESS (VBox strict status code).
5303	* @param pVM The cross context VM structure.
5304	* @param pVCpu The cross context virtual CPU structure of the calling EMT. Unused.
5305	* @param pvUser User parameter, unused.
5306	*/
5307	static DECLCALLBACK(VBOXSTRICTRC) pgmR3PhysWriteProtectRAMRendezvous(PVM pVM, PVMCPU pVCpu, void *pvUser)
5308	{
5309	int rc = VINF_SUCCESS;
5310	NOREF(pvUser); NOREF(pVCpu);
5311
5312	PGM_LOCK_VOID(pVM);
5313	#ifdef PGMPOOL_WITH_OPTIMIZED_DIRTY_PT
5314	pgmPoolResetDirtyPages(pVM);
5315	#endif
5316
5317	/** @todo pointless to write protect the physical page pointed to by RSP. */
5318
5319	for (PPGMRAMRANGE pRam = pVM->pgm.s.CTX_SUFF(pRamRangesX);
5320	pRam;
5321	pRam = pRam->CTX_SUFF(pNext))
5322	{
5323	uint32_t cPages = pRam->cb >> GUEST_PAGE_SHIFT;
5324	for (uint32_t iPage = 0; iPage < cPages; iPage++)
5325	{
5326	PPGMPAGE pPage = &pRam->aPages[iPage];
5327	PGMPAGETYPE enmPageType = (PGMPAGETYPE)PGM_PAGE_GET_TYPE(pPage);
5328
5329	if ( RT_LIKELY(enmPageType == PGMPAGETYPE_RAM)
5330	\|\| enmPageType == PGMPAGETYPE_MMIO2)
5331	{
5332	/*
5333	* A RAM page.
5334	*/
5335	switch (PGM_PAGE_GET_STATE(pPage))
5336	{
5337	case PGM_PAGE_STATE_ALLOCATED:
5338	/** @todo Optimize this: Don't always re-enable write
5339	* monitoring if the page is known to be very busy. */
5340	if (PGM_PAGE_IS_WRITTEN_TO(pPage))
5341	PGM_PAGE_CLEAR_WRITTEN_TO(pVM, pPage);
5342
5343	pgmPhysPageWriteMonitor(pVM, pPage, pRam->GCPhys + ((RTGCPHYS)iPage << GUEST_PAGE_SHIFT));
5344	break;
5345
5346	case PGM_PAGE_STATE_SHARED:
5347	AssertFailed();
5348	break;
5349
5350	case PGM_PAGE_STATE_WRITE_MONITORED: /* nothing to change. */
5351	default:
5352	break;
5353	}
5354	}
5355	}
5356	}
5357	pgmR3PoolWriteProtectPages(pVM);
5358	PGM_INVL_ALL_VCPU_TLBS(pVM);
5359	for (VMCPUID idCpu = 0; idCpu < pVM->cCpus; idCpu++)
5360	CPUMSetChangedFlags(pVM->apCpusR3[idCpu], CPUM_CHANGED_GLOBAL_TLB_FLUSH);
5361
5362	PGM_UNLOCK(pVM);
5363	return rc;
5364	}
5365
5366	/**
5367	* Protect all physical RAM to monitor writes
5368	*
5369	* @returns VBox status code.
5370	* @param pVM The cross context VM structure.
5371	*/
5372	VMMR3DECL(int) PGMR3PhysWriteProtectRAM(PVM pVM)
5373	{
5374	VM_ASSERT_EMT_RETURN(pVM, VERR_VM_THREAD_NOT_EMT);
5375
5376	int rc = VMMR3EmtRendezvous(pVM, VMMEMTRENDEZVOUS_FLAGS_TYPE_ONCE, pgmR3PhysWriteProtectRAMRendezvous, NULL);
5377	AssertRC(rc);
5378	return rc;
5379	}
5380
5381
5382	/*********************************************************************************************************************************
5383	* Stats. *
5384	*********************************************************************************************************************************/
5385
5386	/**
5387	* Query the amount of free memory inside VMMR0
5388	*
5389	* @returns VBox status code.
5390	* @param pUVM The user mode VM handle.
5391	* @param pcbAllocMem Where to return the amount of memory allocated
5392	* by VMs.
5393	* @param pcbFreeMem Where to return the amount of memory that is
5394	* allocated from the host but not currently used
5395	* by any VMs.
5396	* @param pcbBallonedMem Where to return the sum of memory that is
5397	* currently ballooned by the VMs.
5398	* @param pcbSharedMem Where to return the amount of memory that is
5399	* currently shared.
5400	*/
5401	VMMR3DECL(int) PGMR3QueryGlobalMemoryStats(PUVM pUVM, uint64_t pcbAllocMem, uint64_t pcbFreeMem,
5402	uint64_t pcbBallonedMem, uint64_t pcbSharedMem)
5403	{
5404	UVM_ASSERT_VALID_EXT_RETURN(pUVM, VERR_INVALID_VM_HANDLE);
5405	VM_ASSERT_VALID_EXT_RETURN(pUVM->pVM, VERR_INVALID_VM_HANDLE);
5406
5407	uint64_t cAllocPages = 0;
5408	uint64_t cFreePages = 0;
5409	uint64_t cBalloonPages = 0;
5410	uint64_t cSharedPages = 0;
5411	if (!SUPR3IsDriverless())
5412	{
5413	int rc = GMMR3QueryHypervisorMemoryStats(pUVM->pVM, &cAllocPages, &cFreePages, &cBalloonPages, &cSharedPages);
5414	AssertRCReturn(rc, rc);
5415	}
5416
5417	if (pcbAllocMem)
5418	pcbAllocMem = cAllocPages _4K;
5419
5420	if (pcbFreeMem)
5421	pcbFreeMem = cFreePages _4K;
5422
5423	if (pcbBallonedMem)
5424	pcbBallonedMem = cBalloonPages _4K;
5425
5426	if (pcbSharedMem)
5427	pcbSharedMem = cSharedPages _4K;
5428
5429	Log(("PGMR3QueryVMMMemoryStats: all=%llx free=%llx ballooned=%llx shared=%llx\n",
5430	cAllocPages, cFreePages, cBalloonPages, cSharedPages));
5431	return VINF_SUCCESS;
5432	}
5433
5434
5435	/**
5436	* Query memory stats for the VM.
5437	*
5438	* @returns VBox status code.
5439	* @param pUVM The user mode VM handle.
5440	* @param pcbTotalMem Where to return total amount memory the VM may
5441	* possibly use.
5442	* @param pcbPrivateMem Where to return the amount of private memory
5443	* currently allocated.
5444	* @param pcbSharedMem Where to return the amount of actually shared
5445	* memory currently used by the VM.
5446	* @param pcbZeroMem Where to return the amount of memory backed by
5447	* zero pages.
5448	*
5449	* @remarks The total mem is normally larger than the sum of the three
5450	* components. There are two reasons for this, first the amount of
5451	* shared memory is what we're sure is shared instead of what could
5452	* possibly be shared with someone. Secondly, because the total may
5453	* include some pure MMIO pages that doesn't go into any of the three
5454	* sub-counts.
5455	*
5456	* @todo Why do we return reused shared pages instead of anything that could
5457	* potentially be shared? Doesn't this mean the first VM gets a much
5458	* lower number of shared pages?
5459	*/
5460	VMMR3DECL(int) PGMR3QueryMemoryStats(PUVM pUVM, uint64_t pcbTotalMem, uint64_t pcbPrivateMem,
5461	uint64_t pcbSharedMem, uint64_t pcbZeroMem)
5462	{
5463	UVM_ASSERT_VALID_EXT_RETURN(pUVM, VERR_INVALID_VM_HANDLE);
5464	PVM pVM = pUVM->pVM;
5465	VM_ASSERT_VALID_EXT_RETURN(pVM, VERR_INVALID_VM_HANDLE);
5466
5467	if (pcbTotalMem)
5468	pcbTotalMem = (uint64_t)pVM->pgm.s.cAllPages GUEST_PAGE_SIZE;
5469
5470	if (pcbPrivateMem)
5471	pcbPrivateMem = (uint64_t)pVM->pgm.s.cPrivatePages GUEST_PAGE_SIZE;
5472
5473	if (pcbSharedMem)
5474	pcbSharedMem = (uint64_t)pVM->pgm.s.cReusedSharedPages GUEST_PAGE_SIZE;
5475
5476	if (pcbZeroMem)
5477	pcbZeroMem = (uint64_t)pVM->pgm.s.cZeroPages GUEST_PAGE_SIZE;
5478
5479	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));
5480	return VINF_SUCCESS;
5481	}
5482
5483
5484
5485	/*********************************************************************************************************************************
5486	* Chunk Mappings and Page Allocation *
5487	*********************************************************************************************************************************/
5488
5489	/**
5490	* Tree enumeration callback for dealing with age rollover.
5491	* It will perform a simple compression of the current age.
5492	*/
5493	static DECLCALLBACK(int) pgmR3PhysChunkAgeingRolloverCallback(PAVLU32NODECORE pNode, void *pvUser)
5494	{
5495	/* Age compression - ASSUMES iNow == 4. */
5496	PPGMCHUNKR3MAP pChunk = (PPGMCHUNKR3MAP)pNode;
5497	if (pChunk->iLastUsed >= UINT32_C(0xffffff00))
5498	pChunk->iLastUsed = 3;
5499	else if (pChunk->iLastUsed >= UINT32_C(0xfffff000))
5500	pChunk->iLastUsed = 2;
5501	else if (pChunk->iLastUsed)
5502	pChunk->iLastUsed = 1;
5503	else /* iLastUsed = 0 */
5504	pChunk->iLastUsed = 4;
5505
5506	NOREF(pvUser);
5507	return 0;
5508	}
5509
5510
5511	/**
5512	* The structure passed in the pvUser argument of pgmR3PhysChunkUnmapCandidateCallback().
5513	*/
5514	typedef struct PGMR3PHYSCHUNKUNMAPCB
5515	{
5516	PVM pVM; /*< Pointer to the VM. /
5517	PPGMCHUNKR3MAP pChunk; /*< The chunk to unmap. /
5518	} PGMR3PHYSCHUNKUNMAPCB, *PPGMR3PHYSCHUNKUNMAPCB;
5519
5520
5521	/**
5522	* Callback used to find the mapping that's been unused for
5523	* the longest time.
5524	*/
5525	static DECLCALLBACK(int) pgmR3PhysChunkUnmapCandidateCallback(PAVLU32NODECORE pNode, void *pvUser)
5526	{
5527	PPGMCHUNKR3MAP pChunk = (PPGMCHUNKR3MAP)pNode;
5528	PPGMR3PHYSCHUNKUNMAPCB pArg = (PPGMR3PHYSCHUNKUNMAPCB)pvUser;
5529
5530	/*
5531	* Check for locks and compare when last used.
5532	*/
5533	if (pChunk->cRefs)
5534	return 0;
5535	if (pChunk->cPermRefs)
5536	return 0;
5537	if ( pArg->pChunk
5538	&& pChunk->iLastUsed >= pArg->pChunk->iLastUsed)
5539	return 0;
5540
5541	/*
5542	* Check that it's not in any of the TLBs.
5543	*/
5544	PVM pVM = pArg->pVM;
5545	if ( pVM->pgm.s.ChunkR3Map.Tlb.aEntries[PGM_CHUNKR3MAPTLB_IDX(pChunk->Core.Key)].idChunk
5546	== pChunk->Core.Key)
5547	{
5548	pChunk = NULL;
5549	return 0;
5550	}
5551	#ifdef VBOX_STRICT
5552	for (unsigned i = 0; i < RT_ELEMENTS(pVM->pgm.s.ChunkR3Map.Tlb.aEntries); i++)
5553	{
5554	Assert(pVM->pgm.s.ChunkR3Map.Tlb.aEntries[i].pChunk != pChunk);
5555	Assert(pVM->pgm.s.ChunkR3Map.Tlb.aEntries[i].idChunk != pChunk->Core.Key);
5556	}
5557	#endif
5558
5559	for (unsigned i = 0; i < RT_ELEMENTS(pVM->pgm.s.PhysTlbR3.aEntries); i++)
5560	if (pVM->pgm.s.PhysTlbR3.aEntries[i].pMap == pChunk)
5561	return 0;
5562
5563	pArg->pChunk = pChunk;
5564	return 0;
5565	}
5566
5567
5568	/**
5569	* Finds a good candidate for unmapping when the ring-3 mapping cache is full.
5570	*
5571	* The candidate will not be part of any TLBs, so no need to flush
5572	* anything afterwards.
5573	*
5574	* @returns Chunk id.
5575	* @param pVM The cross context VM structure.
5576	*/
5577	static int32_t pgmR3PhysChunkFindUnmapCandidate(PVM pVM)
5578	{
5579	PGM_LOCK_ASSERT_OWNER(pVM);
5580
5581	/*
5582	* Enumerate the age tree starting with the left most node.
5583	*/
5584	STAM_PROFILE_START(&pVM->pgm.s.Stats.StatChunkFindCandidate, a);
5585	PGMR3PHYSCHUNKUNMAPCB Args;
5586	Args.pVM = pVM;
5587	Args.pChunk = NULL;
5588	RTAvlU32DoWithAll(&pVM->pgm.s.ChunkR3Map.pTree, true /fFromLeft/, pgmR3PhysChunkUnmapCandidateCallback, &Args);
5589	Assert(Args.pChunk);
5590	if (Args.pChunk)
5591	{
5592	Assert(Args.pChunk->cRefs == 0);
5593	Assert(Args.pChunk->cPermRefs == 0);
5594	STAM_PROFILE_STOP(&pVM->pgm.s.Stats.StatChunkFindCandidate, a);
5595	return Args.pChunk->Core.Key;
5596	}
5597
5598	STAM_PROFILE_STOP(&pVM->pgm.s.Stats.StatChunkFindCandidate, a);
5599	return INT32_MAX;
5600	}
5601
5602
5603	/**
5604	* Rendezvous callback used by pgmR3PhysUnmapChunk that unmaps a chunk
5605	*
5606	* This is only called on one of the EMTs while the other ones are waiting for
5607	* it to complete this function.
5608	*
5609	* @returns VINF_SUCCESS (VBox strict status code).
5610	* @param pVM The cross context VM structure.
5611	* @param pVCpu The cross context virtual CPU structure of the calling EMT. Unused.
5612	* @param pvUser User pointer. Unused
5613	*
5614	*/
5615	static DECLCALLBACK(VBOXSTRICTRC) pgmR3PhysUnmapChunkRendezvous(PVM pVM, PVMCPU pVCpu, void *pvUser)
5616	{
5617	int rc = VINF_SUCCESS;
5618	PGM_LOCK_VOID(pVM);
5619	NOREF(pVCpu); NOREF(pvUser);
5620
5621	if (pVM->pgm.s.ChunkR3Map.c >= pVM->pgm.s.ChunkR3Map.cMax)
5622	{
5623	/* Flush the pgm pool cache; call the internal rendezvous handler as we're already in a rendezvous handler here. */
5624	/** @todo also not really efficient to unmap a chunk that contains PD
5625	* or PT pages. */
5626	pgmR3PoolClearAllRendezvous(pVM, pVM->apCpusR3[0], NULL /* no need to flush the REM TLB as we already did that above */);
5627
5628	/*
5629	* Request the ring-0 part to unmap a chunk to make space in the mapping cache.
5630	*/
5631	GMMMAPUNMAPCHUNKREQ Req;
5632	Req.Hdr.u32Magic = SUPVMMR0REQHDR_MAGIC;
5633	Req.Hdr.cbReq = sizeof(Req);
5634	Req.pvR3 = NULL;
5635	Req.idChunkMap = NIL_GMM_CHUNKID;
5636	Req.idChunkUnmap = pgmR3PhysChunkFindUnmapCandidate(pVM);
5637	if (Req.idChunkUnmap != INT32_MAX)
5638	{
5639	STAM_PROFILE_START(&pVM->pgm.s.Stats.StatChunkUnmap, a);
5640	rc = VMMR3CallR0(pVM, VMMR0_DO_GMM_MAP_UNMAP_CHUNK, 0, &Req.Hdr);
5641	STAM_PROFILE_STOP(&pVM->pgm.s.Stats.StatChunkUnmap, a);
5642	if (RT_SUCCESS(rc))
5643	{
5644	/*
5645	* Remove the unmapped one.
5646	*/
5647	PPGMCHUNKR3MAP pUnmappedChunk = (PPGMCHUNKR3MAP)RTAvlU32Remove(&pVM->pgm.s.ChunkR3Map.pTree, Req.idChunkUnmap);
5648	AssertRelease(pUnmappedChunk);
5649	AssertRelease(!pUnmappedChunk->cRefs);
5650	AssertRelease(!pUnmappedChunk->cPermRefs);
5651	pUnmappedChunk->pv = NULL;
5652	pUnmappedChunk->Core.Key = UINT32_MAX;
5653	MMR3HeapFree(pUnmappedChunk);
5654	pVM->pgm.s.ChunkR3Map.c--;
5655	pVM->pgm.s.cUnmappedChunks++;
5656
5657	/*
5658	* Flush dangling PGM pointers (R3 & R0 ptrs to GC physical addresses).
5659	*/
5660	/** @todo We should not flush chunks which include cr3 mappings. */
5661	for (VMCPUID idCpu = 0; idCpu < pVM->cCpus; idCpu++)
5662	{
5663	PPGMCPU pPGM = &pVM->apCpusR3[idCpu]->pgm.s;
5664
5665	pPGM->pGst32BitPdR3 = NULL;
5666	pPGM->pGstPaePdptR3 = NULL;
5667	pPGM->pGstAmd64Pml4R3 = NULL;
5668	pPGM->pGstEptPml4R3 = NULL;
5669	pPGM->pGst32BitPdR0 = NIL_RTR0PTR;
5670	pPGM->pGstPaePdptR0 = NIL_RTR0PTR;
5671	pPGM->pGstAmd64Pml4R0 = NIL_RTR0PTR;
5672	pPGM->pGstEptPml4R0 = NIL_RTR0PTR;
5673	for (unsigned i = 0; i < RT_ELEMENTS(pPGM->apGstPaePDsR3); i++)
5674	{
5675	pPGM->apGstPaePDsR3[i] = NULL;
5676	pPGM->apGstPaePDsR0[i] = NIL_RTR0PTR;
5677	}
5678
5679	/* Flush REM TLBs. */
5680	CPUMSetChangedFlags(pVM->apCpusR3[idCpu], CPUM_CHANGED_GLOBAL_TLB_FLUSH);
5681	}
5682	}
5683	}
5684	}
5685	PGM_UNLOCK(pVM);
5686	return rc;
5687	}
5688
5689	/**
5690	* Unmap a chunk to free up virtual address space (request packet handler for pgmR3PhysChunkMap)
5691	*
5692	* @param pVM The cross context VM structure.
5693	*/
5694	static DECLCALLBACK(void) pgmR3PhysUnmapChunk(PVM pVM)
5695	{
5696	int rc = VMMR3EmtRendezvous(pVM, VMMEMTRENDEZVOUS_FLAGS_TYPE_ONCE, pgmR3PhysUnmapChunkRendezvous, NULL);
5697	AssertRC(rc);
5698	}
5699
5700
5701	/**
5702	* Maps the given chunk into the ring-3 mapping cache.
5703	*
5704	* This will call ring-0.
5705	*
5706	* @returns VBox status code.
5707	* @param pVM The cross context VM structure.
5708	* @param idChunk The chunk in question.
5709	* @param ppChunk Where to store the chunk tracking structure.
5710	*
5711	* @remarks Called from within the PGM critical section.
5712	* @remarks Can be called from any thread!
5713	*/
5714	int pgmR3PhysChunkMap(PVM pVM, uint32_t idChunk, PPPGMCHUNKR3MAP ppChunk)
5715	{
5716	int rc;
5717
5718	PGM_LOCK_ASSERT_OWNER(pVM);
5719
5720	/*
5721	* Move the chunk time forward.
5722	*/
5723	pVM->pgm.s.ChunkR3Map.iNow++;
5724	if (pVM->pgm.s.ChunkR3Map.iNow == 0)
5725	{
5726	pVM->pgm.s.ChunkR3Map.iNow = 4;
5727	RTAvlU32DoWithAll(&pVM->pgm.s.ChunkR3Map.pTree, true /fFromLeft/, pgmR3PhysChunkAgeingRolloverCallback, NULL);
5728	}
5729
5730	/*
5731	* Allocate a new tracking structure first.
5732	*/
5733	PPGMCHUNKR3MAP pChunk = (PPGMCHUNKR3MAP)MMR3HeapAllocZ(pVM, MM_TAG_PGM_CHUNK_MAPPING, sizeof(*pChunk));
5734	AssertReturn(pChunk, VERR_NO_MEMORY);
5735	pChunk->Core.Key = idChunk;
5736	pChunk->iLastUsed = pVM->pgm.s.ChunkR3Map.iNow;
5737
5738	/*
5739	* Request the ring-0 part to map the chunk in question.
5740	*/
5741	GMMMAPUNMAPCHUNKREQ Req;
5742	Req.Hdr.u32Magic = SUPVMMR0REQHDR_MAGIC;
5743	Req.Hdr.cbReq = sizeof(Req);
5744	Req.pvR3 = NULL;
5745	Req.idChunkMap = idChunk;
5746	Req.idChunkUnmap = NIL_GMM_CHUNKID;
5747
5748	/* Must be callable from any thread, so can't use VMMR3CallR0. */
5749	STAM_PROFILE_START(&pVM->pgm.s.Stats.StatChunkMap, a);
5750	rc = SUPR3CallVMMR0Ex(VMCC_GET_VMR0_FOR_CALL(pVM), NIL_VMCPUID, VMMR0_DO_GMM_MAP_UNMAP_CHUNK, 0, &Req.Hdr);
5751	STAM_PROFILE_STOP(&pVM->pgm.s.Stats.StatChunkMap, a);
5752	if (RT_SUCCESS(rc))
5753	{
5754	pChunk->pv = Req.pvR3;
5755
5756	/*
5757	* If we're running out of virtual address space, then we should
5758	* unmap another chunk.
5759	*
5760	* Currently, an unmap operation requires that all other virtual CPUs
5761	* are idling and not by chance making use of the memory we're
5762	* unmapping. So, we create an async unmap operation here.
5763	*
5764	* Now, when creating or restoring a saved state this wont work very
5765	* well since we may want to restore all guest RAM + a little something.
5766	* So, we have to do the unmap synchronously. Fortunately for us
5767	* though, during these operations the other virtual CPUs are inactive
5768	* and it should be safe to do this.
5769	*/
5770	/** @todo Eventually we should lock all memory when used and do
5771	* map+unmap as one kernel call without any rendezvous or
5772	* other precautions. */
5773	if (pVM->pgm.s.ChunkR3Map.c + 1 >= pVM->pgm.s.ChunkR3Map.cMax)
5774	{
5775	switch (VMR3GetState(pVM))
5776	{
5777	case VMSTATE_LOADING:
5778	case VMSTATE_SAVING:
5779	{
5780	PVMCPU pVCpu = VMMGetCpu(pVM);
5781	if ( pVCpu
5782	&& pVM->pgm.s.cDeprecatedPageLocks == 0)
5783	{
5784	pgmR3PhysUnmapChunkRendezvous(pVM, pVCpu, NULL);
5785	break;
5786	}
5787	}
5788	RT_FALL_THRU();
5789	default:
5790	rc = VMR3ReqCallNoWait(pVM, VMCPUID_ANY_QUEUE, (PFNRT)pgmR3PhysUnmapChunk, 1, pVM);
5791	AssertRC(rc);
5792	break;
5793	}
5794	}
5795
5796	/*
5797	* Update the tree. We must do this after any unmapping to make sure
5798	* the chunk we're going to return isn't unmapped by accident.
5799	*/
5800	AssertPtr(Req.pvR3);
5801	bool fRc = RTAvlU32Insert(&pVM->pgm.s.ChunkR3Map.pTree, &pChunk->Core);
5802	AssertRelease(fRc);
5803	pVM->pgm.s.ChunkR3Map.c++;
5804	pVM->pgm.s.cMappedChunks++;
5805	}
5806	else
5807	{
5808	/** @todo this may fail because of /proc/sys/vm/max_map_count, so we
5809	* should probably restrict ourselves on linux. */
5810	AssertRC(rc);
5811	MMR3HeapFree(pChunk);
5812	pChunk = NULL;
5813	}
5814
5815	*ppChunk = pChunk;
5816	return rc;
5817	}
5818
5819
5820	/**
5821	* Invalidates the TLB for the ring-3 mapping cache.
5822	*
5823	* @param pVM The cross context VM structure.
5824	*/
5825	VMMR3DECL(void) PGMR3PhysChunkInvalidateTLB(PVM pVM)
5826	{
5827	PGM_LOCK_VOID(pVM);
5828	for (unsigned i = 0; i < RT_ELEMENTS(pVM->pgm.s.ChunkR3Map.Tlb.aEntries); i++)
5829	{
5830	pVM->pgm.s.ChunkR3Map.Tlb.aEntries[i].idChunk = NIL_GMM_CHUNKID;
5831	pVM->pgm.s.ChunkR3Map.Tlb.aEntries[i].pChunk = NULL;
5832	}
5833	/* The page map TLB references chunks, so invalidate that one too. */
5834	pgmPhysInvalidatePageMapTLB(pVM);
5835	PGM_UNLOCK(pVM);
5836	}
5837
5838
5839	/**
5840	* Response to VM_FF_PGM_NEED_HANDY_PAGES and helper for pgmPhysEnsureHandyPage.
5841	*
5842	* This function will also work the VM_FF_PGM_NO_MEMORY force action flag, to
5843	* signal and clear the out of memory condition. When called, this API is used
5844	* to try clear the condition when the user wants to resume.
5845	*
5846	* @returns The following VBox status codes.
5847	* @retval VINF_SUCCESS on success. FFs cleared.
5848	* @retval VINF_EM_NO_MEMORY if we're out of memory. The FF is not cleared in
5849	* this case and it gets accompanied by VM_FF_PGM_NO_MEMORY.
5850	*
5851	* @param pVM The cross context VM structure.
5852	*
5853	* @remarks The VINF_EM_NO_MEMORY status is for the benefit of the FF processing
5854	* in EM.cpp and shouldn't be propagated outside TRPM, HM, EM and
5855	* pgmPhysEnsureHandyPage. There is one exception to this in the \#PF
5856	* handler.
5857	*/
5858	VMMR3DECL(int) PGMR3PhysAllocateHandyPages(PVM pVM)
5859	{
5860	PGM_LOCK_VOID(pVM);
5861
5862	/*
5863	* Allocate more pages, noting down the index of the first new page.
5864	*/
5865	uint32_t iClear = pVM->pgm.s.cHandyPages;
5866	AssertMsgReturn(iClear <= RT_ELEMENTS(pVM->pgm.s.aHandyPages), ("%d", iClear), VERR_PGM_HANDY_PAGE_IPE);
5867	Log(("PGMR3PhysAllocateHandyPages: %d -> %d\n", iClear, RT_ELEMENTS(pVM->pgm.s.aHandyPages)));
5868	int rc = VMMR3CallR0(pVM, VMMR0_DO_PGM_ALLOCATE_HANDY_PAGES, 0, NULL);
5869	/** @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) */
5870	if ( rc == VERR_GMM_HIT_VM_ACCOUNT_LIMIT
5871	&& pVM->pgm.s.cHandyPages > 0)
5872	{
5873	/* Still handy pages left, so don't panic. */
5874	rc = VINF_SUCCESS;
5875	}
5876
5877	if (RT_SUCCESS(rc))
5878	{
5879	AssertMsg(rc == VINF_SUCCESS, ("%Rrc\n", rc));
5880	Assert(pVM->pgm.s.cHandyPages > 0);
5881	#ifdef VBOX_STRICT
5882	uint32_t i;
5883	for (i = iClear; i < pVM->pgm.s.cHandyPages; i++)
5884	if ( pVM->pgm.s.aHandyPages[i].idPage == NIL_GMM_PAGEID
5885	\|\| pVM->pgm.s.aHandyPages[i].idSharedPage != NIL_GMM_PAGEID
5886	\|\| (pVM->pgm.s.aHandyPages[i].HCPhysGCPhys & GUEST_PAGE_OFFSET_MASK))
5887	break;
5888	if (i != pVM->pgm.s.cHandyPages)
5889	{
5890	RTAssertMsg1Weak(NULL, __LINE__, __FILE__, __FUNCTION__);
5891	RTAssertMsg2Weak("i=%d iClear=%d cHandyPages=%d\n", i, iClear, pVM->pgm.s.cHandyPages);
5892	for (uint32_t j = iClear; j < pVM->pgm.s.cHandyPages; j++)
5893	RTAssertMsg2Add("%03d: idPage=%d HCPhysGCPhys=%RHp idSharedPage=%d%s\n", j,
5894	pVM->pgm.s.aHandyPages[j].idPage,
5895	pVM->pgm.s.aHandyPages[j].HCPhysGCPhys,
5896	pVM->pgm.s.aHandyPages[j].idSharedPage,
5897	j == i ? " <---" : "");
5898	RTAssertPanic();
5899	}
5900	#endif
5901	}
5902	else
5903	{
5904	/*
5905	* We should never get here unless there is a genuine shortage of
5906	* memory (or some internal error). Flag the error so the VM can be
5907	* suspended ASAP and the user informed. If we're totally out of
5908	* handy pages we will return failure.
5909	*/
5910	/* Report the failure. */
5911	LogRel(("PGM: Failed to procure handy pages; rc=%Rrc cHandyPages=%#x\n"
5912	" cAllPages=%#x cPrivatePages=%#x cSharedPages=%#x cZeroPages=%#x\n",
5913	rc, pVM->pgm.s.cHandyPages,
5914	pVM->pgm.s.cAllPages, pVM->pgm.s.cPrivatePages, pVM->pgm.s.cSharedPages, pVM->pgm.s.cZeroPages));
5915
5916	if ( rc != VERR_NO_MEMORY
5917	&& rc != VERR_NO_PHYS_MEMORY
5918	&& rc != VERR_LOCK_FAILED)
5919	for (uint32_t i = 0; i < RT_ELEMENTS(pVM->pgm.s.aHandyPages); i++)
5920	{
5921	LogRel(("PGM: aHandyPages[#%#04x] = {.HCPhysGCPhys=%RHp, .idPage=%#08x, .idSharedPage=%#08x}\n",
5922	i, pVM->pgm.s.aHandyPages[i].HCPhysGCPhys, pVM->pgm.s.aHandyPages[i].idPage,
5923	pVM->pgm.s.aHandyPages[i].idSharedPage));
5924	uint32_t const idPage = pVM->pgm.s.aHandyPages[i].idPage;
5925	if (idPage != NIL_GMM_PAGEID)
5926	{
5927	for (PPGMRAMRANGE pRam = pVM->pgm.s.pRamRangesXR3;
5928	pRam;
5929	pRam = pRam->pNextR3)
5930	{
5931	uint32_t const cPages = pRam->cb >> GUEST_PAGE_SHIFT;
5932	for (uint32_t iPage = 0; iPage < cPages; iPage++)
5933	if (PGM_PAGE_GET_PAGEID(&pRam->aPages[iPage]) == idPage)
5934	LogRel(("PGM: Used by %RGp %R[pgmpage] (%s)\n",
5935	pRam->GCPhys + ((RTGCPHYS)iPage << GUEST_PAGE_SHIFT), &pRam->aPages[iPage], pRam->pszDesc));
5936	}
5937	}
5938	}
5939
5940	if (rc == VERR_NO_MEMORY)
5941	{
5942	uint64_t cbHostRamAvail = 0;
5943	int rc2 = RTSystemQueryAvailableRam(&cbHostRamAvail);
5944	if (RT_SUCCESS(rc2))
5945	LogRel(("Host RAM: %RU64MB available\n", cbHostRamAvail / _1M));
5946	else
5947	LogRel(("Cannot determine the amount of available host memory\n"));
5948	}
5949
5950	/* Set the FFs and adjust rc. */
5951	VM_FF_SET(pVM, VM_FF_PGM_NEED_HANDY_PAGES);
5952	VM_FF_SET(pVM, VM_FF_PGM_NO_MEMORY);
5953	if ( rc == VERR_NO_MEMORY
5954	\|\| rc == VERR_NO_PHYS_MEMORY
5955	\|\| rc == VERR_LOCK_FAILED)
5956	rc = VINF_EM_NO_MEMORY;
5957	}
5958
5959	PGM_UNLOCK(pVM);
5960	return rc;
5961	}
5962
5963
5964	/*********************************************************************************************************************************
5965	* Other Stuff *
5966	*********************************************************************************************************************************/
5967
5968	#if !defined(VBOX_VMM_TARGET_ARMV8)
5969	/**
5970	* Sets the Address Gate 20 state.
5971	*
5972	* @param pVCpu The cross context virtual CPU structure.
5973	* @param fEnable True if the gate should be enabled.
5974	* False if the gate should be disabled.
5975	*/
5976	VMMDECL(void) PGMR3PhysSetA20(PVMCPU pVCpu, bool fEnable)
5977	{
5978	LogFlow(("PGMR3PhysSetA20 %d (was %d)\n", fEnable, pVCpu->pgm.s.fA20Enabled));
5979	if (pVCpu->pgm.s.fA20Enabled != fEnable)
5980	{
5981	#ifdef VBOX_WITH_NESTED_HWVIRT_VMX
5982	PCCPUMCTX pCtx = CPUMQueryGuestCtxPtr(pVCpu);
5983	if ( CPUMIsGuestInVmxRootMode(pCtx)
5984	&& !fEnable)
5985	{
5986	Log(("Cannot enter A20M mode while in VMX root mode\n"));
5987	return;
5988	}
5989	#endif
5990	pVCpu->pgm.s.fA20Enabled = fEnable;
5991	pVCpu->pgm.s.GCPhysA20Mask = ~((RTGCPHYS)!fEnable << 20);
5992	if (VM_IS_NEM_ENABLED(pVCpu->CTX_SUFF(pVM)))
5993	NEMR3NotifySetA20(pVCpu, fEnable);
5994	#ifdef PGM_WITH_A20
5995	VMCPU_FF_SET(pVCpu, VMCPU_FF_PGM_SYNC_CR3);
5996	pgmR3RefreshShadowModeAfterA20Change(pVCpu);
5997	HMFlushTlb(pVCpu);
5998	#endif
5999	#if 0 /* PGMGetPage will apply the A20 mask to the GCPhys it returns, so we must invalid both sides of the TLB. */
6000	IEMTlbInvalidateAllPhysical(pVCpu);
6001	#else
6002	IEMTlbInvalidateAll(pVCpu);
6003	#endif
6004	STAM_REL_COUNTER_INC(&pVCpu->pgm.s.cA20Changes);
6005	}
6006	}
6007	#endif
6008

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

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