PGMPhys.cpp@ 4953

Last change on this file since 4953 was 4811, checked in by vboxsync, 17 years ago
Split VMMR0Entry into VMMR0EntryInt, VMMR0EntryFast and VMMr0EntryEx. This will prevent the SUPCallVMMR0Ex path from causing harm and messing up the paths that has to be optimized.
Property svn:eol-style set to `native` Property svn:keywords set to `Id`
File size: 30.3 KB

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1	/* $Id: PGMPhys.cpp 4811 2007-09-14 17:53:56Z vboxsync $ */
2	/** @file
3	* PGM - Page Manager and Monitor, Physical Memory Addressing.
4	*/
5
6	/*
7	* Copyright (C) 2006-2007 innotek GmbH
8	*
9	* This file is part of VirtualBox Open Source Edition (OSE), as
10	* available from http://www.virtualbox.org. This file is free software;
11	* you can redistribute it and/or modify it under the terms of the GNU
12	* General Public License as published by the Free Software Foundation,
13	* in version 2 as it comes in the "COPYING" file of the VirtualBox OSE
14	* distribution. VirtualBox OSE is distributed in the hope that it will
15	* be useful, but WITHOUT ANY WARRANTY of any kind.
16	*/
17
18
19	/*******************************************************************************
20	* Header Files *
21	*******************************************************************************/
22	#define LOG_GROUP LOG_GROUP_PGM
23	#include <VBox/pgm.h>
24	#include <VBox/cpum.h>
25	#include <VBox/iom.h>
26	#include <VBox/sup.h>
27	#include <VBox/mm.h>
28	#include <VBox/stam.h>
29	#include <VBox/rem.h>
30	#include <VBox/csam.h>
31	#include "PGMInternal.h"
32	#include <VBox/vm.h>
33	#include <VBox/dbg.h>
34	#include <VBox/param.h>
35	#include <VBox/err.h>
36	#include <iprt/assert.h>
37	#include <iprt/alloc.h>
38	#include <iprt/asm.h>
39	#include <VBox/log.h>
40	#include <iprt/thread.h>
41	#include <iprt/string.h>
42
43
44
45	/*
46	* PGMR3PhysReadByte/Word/Dword
47	* PGMR3PhysWriteByte/Word/Dword
48	*/
49
50	#define PGMPHYSFN_READNAME PGMR3PhysReadByte
51	#define PGMPHYSFN_WRITENAME PGMR3PhysWriteByte
52	#define PGMPHYS_DATASIZE 1
53	#define PGMPHYS_DATATYPE uint8_t
54	#include "PGMPhys.h"
55
56	#define PGMPHYSFN_READNAME PGMR3PhysReadWord
57	#define PGMPHYSFN_WRITENAME PGMR3PhysWriteWord
58	#define PGMPHYS_DATASIZE 2
59	#define PGMPHYS_DATATYPE uint16_t
60	#include "PGMPhys.h"
61
62	#define PGMPHYSFN_READNAME PGMR3PhysReadDword
63	#define PGMPHYSFN_WRITENAME PGMR3PhysWriteDword
64	#define PGMPHYS_DATASIZE 4
65	#define PGMPHYS_DATATYPE uint32_t
66	#include "PGMPhys.h"
67
68
69
70
71	/**
72	* Interface that the MMR3RamRegister(), MMR3RomRegister() and MMIO handler
73	* registration APIs calls to inform PGM about memory registrations.
74	*
75	* It registers the physical memory range with PGM. MM is responsible
76	* for the toplevel things - allocation and locking - while PGM is taking
77	* care of all the details and implements the physical address space virtualization.
78	*
79	* @returns VBox status.
80	* @param pVM The VM handle.
81	* @param pvRam HC virtual address of the RAM range. (page aligned)
82	* @param GCPhys GC physical address of the RAM range. (page aligned)
83	* @param cb Size of the RAM range. (page aligned)
84	* @param fFlags Flags, MM_RAM_*.
85	* @param paPages Pointer an array of physical page descriptors.
86	* @param pszDesc Description string.
87	*/
88	PGMR3DECL(int) PGMR3PhysRegister(PVM pVM, void pvRam, RTGCPHYS GCPhys, size_t cb, unsigned fFlags, const SUPPAGE paPages, const char *pszDesc)
89	{
90	/*
91	* Validate input.
92	* (Not so important because callers are only MMR3PhysRegister()
93	* and PGMR3HandlerPhysicalRegisterEx(), but anyway...)
94	*/
95	Log(("PGMR3PhysRegister %08X %x bytes flags %x %s\n", GCPhys, cb, fFlags, pszDesc));
96
97	Assert((fFlags & (MM_RAM_FLAGS_RESERVED \| MM_RAM_FLAGS_MMIO \| MM_RAM_FLAGS_DYNAMIC_ALLOC)) \|\| paPages);
98	/Assert(!(fFlags & MM_RAM_FLAGS_RESERVED) \|\| !paPages);/
99	Assert((fFlags == (MM_RAM_FLAGS_RESERVED \| MM_RAM_FLAGS_MMIO)) \|\| (fFlags & MM_RAM_FLAGS_DYNAMIC_ALLOC) \|\| pvRam);
100	/Assert(!(fFlags & MM_RAM_FLAGS_RESERVED) \|\| !pvRam);/
101	Assert(!(fFlags & ~0xfff));
102	Assert(RT_ALIGN_Z(cb, PAGE_SIZE) == cb && cb);
103	Assert(RT_ALIGN_P(pvRam, PAGE_SIZE) == pvRam);
104	Assert(!(fFlags & ~(MM_RAM_FLAGS_RESERVED \| MM_RAM_FLAGS_ROM \| MM_RAM_FLAGS_MMIO \| MM_RAM_FLAGS_MMIO2 \| MM_RAM_FLAGS_DYNAMIC_ALLOC)));
105	Assert(RT_ALIGN_T(GCPhys, PAGE_SIZE, RTGCPHYS) == GCPhys);
106	RTGCPHYS GCPhysLast = GCPhys + (cb - 1);
107	if (GCPhysLast < GCPhys)
108	{
109	AssertMsgFailed(("The range wraps! GCPhys=%VGp cb=%#x\n", GCPhys, cb));
110	return VERR_INVALID_PARAMETER;
111	}
112
113	/*
114	* Find range location and check for conflicts.
115	*/
116	PPGMRAMRANGE pPrev = NULL;
117	PPGMRAMRANGE pCur = pVM->pgm.s.pRamRangesHC;
118	while (pCur)
119	{
120	if (GCPhys <= pCur->GCPhysLast && GCPhysLast >= pCur->GCPhys)
121	{
122	AssertMsgFailed(("Conflict! This cannot happen!\n"));
123	return VERR_PGM_RAM_CONFLICT;
124	}
125	if (GCPhysLast < pCur->GCPhys)
126	break;
127
128	/* next */
129	pPrev = pCur;
130	pCur = pCur->pNextHC;
131	}
132
133	/*
134	* Allocate RAM range.
135	* Small ranges are allocated from the heap, big ones have separate mappings.
136	*/
137	size_t cbRam = RT_OFFSETOF(PGMRAMRANGE, aPages[cb >> PAGE_SHIFT]);
138	PPGMRAMRANGE pNew;
139	RTGCPTR GCPtrNew;
140	int rc;
141	if (cbRam > PAGE_SIZE / 2)
142	{ /* large */
143	cbRam = RT_ALIGN_Z(cbRam, PAGE_SIZE);
144	rc = SUPPageAlloc(cbRam >> PAGE_SHIFT, (void **)&pNew);
145	if (VBOX_SUCCESS(rc))
146	{
147	rc = MMR3HyperMapHCRam(pVM, pNew, cbRam, true, pszDesc, &GCPtrNew);
148	if (VBOX_SUCCESS(rc))
149	{
150	Assert(MMHyperHC2GC(pVM, pNew) == GCPtrNew);
151	rc = MMR3HyperReserve(pVM, PAGE_SIZE, "fence", NULL);
152	}
153	else
154	{
155	AssertMsgFailed(("MMR3HyperMapHCRam(,,%#x,,,) -> %Vrc\n", cbRam, rc));
156	SUPPageFree(pNew, cbRam >> PAGE_SHIFT);
157	}
158	}
159	else
160	AssertMsgFailed(("SUPPageAlloc(%#x,,) -> %Vrc\n", cbRam >> PAGE_SHIFT, rc));
161	}
162	else
163	{ /* small */
164	rc = MMHyperAlloc(pVM, cbRam, 16, MM_TAG_PGM, (void **)&pNew);
165	if (VBOX_SUCCESS(rc))
166	GCPtrNew = MMHyperHC2GC(pVM, pNew);
167	else
168	AssertMsgFailed(("MMHyperAlloc(,%#x,,,) -> %Vrc\n", cbRam, cb));
169	}
170	if (VBOX_SUCCESS(rc))
171	{
172	/*
173	* Initialize the range.
174	*/
175	pNew->pvHC = pvRam;
176	pNew->GCPhys = GCPhys;
177	pNew->GCPhysLast = GCPhysLast;
178	pNew->cb = cb;
179	pNew->fFlags = fFlags;
180	pNew->pavHCChunkHC = NULL;
181	pNew->pavHCChunkGC = 0;
182
183	unsigned iPage = cb >> PAGE_SHIFT;
184	if (paPages)
185	{
186	while (iPage-- > 0)
187	{
188	pNew->aPages[iPage].HCPhys = (paPages[iPage].Phys & X86_PTE_PAE_PG_MASK) \| fFlags; /** @todo PAGE FLAGS */
189	pNew->aPages[iPage].u2State = PGM_PAGE_STATE_ALLOCATED;
190	pNew->aPages[iPage].fWrittenTo = 0;
191	pNew->aPages[iPage].fSomethingElse = 0;
192	pNew->aPages[iPage].idPage = 0;
193	pNew->aPages[iPage].u32B = 0;
194	}
195	}
196	else if (fFlags & MM_RAM_FLAGS_DYNAMIC_ALLOC)
197	{
198	/* Allocate memory for chunk to HC ptr lookup array. */
199	rc = MMHyperAlloc(pVM, (cb >> PGM_DYNAMIC_CHUNK_SHIFT) * sizeof(void ), 16, MM_TAG_PGM, (void *)&pNew->pavHCChunkHC);
200	AssertMsgReturn(rc == VINF_SUCCESS, ("MMHyperAlloc(,%#x,,,) -> %Vrc\n", cbRam, cb), rc);
201
202	pNew->pavHCChunkGC = MMHyperHC2GC(pVM, pNew->pavHCChunkHC);
203	Assert(pNew->pavHCChunkGC);
204
205	/* Physical memory will be allocated on demand. */
206	while (iPage-- > 0)
207	{
208	pNew->aPages[iPage].HCPhys = fFlags; /** @todo PAGE FLAGS */
209	pNew->aPages[iPage].u2State = PGM_PAGE_STATE_ZERO;
210	pNew->aPages[iPage].fWrittenTo = 0;
211	pNew->aPages[iPage].fSomethingElse = 0;
212	pNew->aPages[iPage].idPage = 0;
213	pNew->aPages[iPage].u32B = 0;
214	}
215	}
216	else
217	{
218	Assert(fFlags == (MM_RAM_FLAGS_RESERVED \| MM_RAM_FLAGS_MMIO));
219	RTHCPHYS HCPhysDummyPage = (MMR3PageDummyHCPhys(pVM) & X86_PTE_PAE_PG_MASK) \| fFlags; /** @todo PAGE FLAGS */
220	while (iPage-- > 0)
221	{
222	pNew->aPages[iPage].HCPhys = HCPhysDummyPage; /** @todo PAGE FLAGS */
223	pNew->aPages[iPage].u2State = PGM_PAGE_STATE_ZERO;
224	pNew->aPages[iPage].fWrittenTo = 0;
225	pNew->aPages[iPage].fSomethingElse = 0;
226	pNew->aPages[iPage].idPage = 0;
227	pNew->aPages[iPage].u32B = 0;
228	}
229	}
230
231	/*
232	* Insert the new RAM range.
233	*/
234	pgmLock(pVM);
235	pNew->pNextHC = pCur;
236	pNew->pNextGC = pCur ? MMHyperHC2GC(pVM, pCur) : 0;
237	if (pPrev)
238	{
239	pPrev->pNextHC = pNew;
240	pPrev->pNextGC = GCPtrNew;
241	}
242	else
243	{
244	pVM->pgm.s.pRamRangesHC = pNew;
245	pVM->pgm.s.pRamRangesGC = GCPtrNew;
246	}
247	pgmUnlock(pVM);
248	}
249	return rc;
250	}
251
252
253	/**
254	* Register a chunk of a the physical memory range with PGM. MM is responsible
255	* for the toplevel things - allocation and locking - while PGM is taking
256	* care of all the details and implements the physical address space virtualization.
257	*
258	*
259	* @returns VBox status.
260	* @param pVM The VM handle.
261	* @param pvRam HC virtual address of the RAM range. (page aligned)
262	* @param GCPhys GC physical address of the RAM range. (page aligned)
263	* @param cb Size of the RAM range. (page aligned)
264	* @param fFlags Flags, MM_RAM_*.
265	* @param paPages Pointer an array of physical page descriptors.
266	* @param pszDesc Description string.
267	*/
268	PGMR3DECL(int) PGMR3PhysRegisterChunk(PVM pVM, void pvRam, RTGCPHYS GCPhys, size_t cb, unsigned fFlags, const SUPPAGE paPages, const char *pszDesc)
269	{
270	#ifdef PGM_DYNAMIC_RAM_ALLOC
271	NOREF(pszDesc);
272
273	/*
274	* Validate input.
275	* (Not so important because callers are only MMR3PhysRegister()
276	* and PGMR3HandlerPhysicalRegisterEx(), but anyway...)
277	*/
278	Log(("PGMR3PhysRegisterChunk %08X %x bytes flags %x %s\n", GCPhys, cb, fFlags, pszDesc));
279
280	Assert(paPages);
281	Assert(pvRam);
282	Assert(!(fFlags & ~0xfff));
283	Assert(RT_ALIGN_Z(cb, PAGE_SIZE) == cb && cb);
284	Assert(RT_ALIGN_P(pvRam, PAGE_SIZE) == pvRam);
285	Assert(!(fFlags & ~(MM_RAM_FLAGS_RESERVED \| MM_RAM_FLAGS_ROM \| MM_RAM_FLAGS_MMIO \| MM_RAM_FLAGS_MMIO2 \| MM_RAM_FLAGS_DYNAMIC_ALLOC)));
286	Assert(RT_ALIGN_T(GCPhys, PAGE_SIZE, RTGCPHYS) == GCPhys);
287	Assert(VM_IS_EMT(pVM));
288	Assert(!(GCPhys & PGM_DYNAMIC_CHUNK_OFFSET_MASK));
289	Assert(cb == PGM_DYNAMIC_CHUNK_SIZE);
290
291	RTGCPHYS GCPhysLast = GCPhys + (cb - 1);
292	if (GCPhysLast < GCPhys)
293	{
294	AssertMsgFailed(("The range wraps! GCPhys=%VGp cb=%#x\n", GCPhys, cb));
295	return VERR_INVALID_PARAMETER;
296	}
297
298	/*
299	* Find existing range location.
300	*/
301	PPGMRAMRANGE pRam = CTXSUFF(pVM->pgm.s.pRamRanges);
302	while (pRam)
303	{
304	RTGCPHYS off = GCPhys - pRam->GCPhys;
305	if ( off < pRam->cb
306	&& (pRam->fFlags & MM_RAM_FLAGS_DYNAMIC_ALLOC))
307	break;
308
309	pRam = CTXSUFF(pRam->pNext);
310	}
311	AssertReturn(pRam, VERR_PGM_INVALID_GC_PHYSICAL_ADDRESS);
312
313	unsigned off = (GCPhys - pRam->GCPhys) >> PAGE_SHIFT;
314	unsigned iPage = cb >> PAGE_SHIFT;
315	if (paPages)
316	{
317	while (iPage-- > 0)
318	pRam->aPages[off + iPage].HCPhys = (paPages[iPage].Phys & X86_PTE_PAE_PG_MASK) \| fFlags; /** @todo PAGE FLAGS */
319	}
320	off >>= (PGM_DYNAMIC_CHUNK_SHIFT - PAGE_SHIFT);
321	pRam->pavHCChunkHC[off] = pvRam;
322
323	/* Notify the recompiler. */
324	REMR3NotifyPhysRamChunkRegister(pVM, GCPhys, PGM_DYNAMIC_CHUNK_SIZE, (RTHCUINTPTR)pvRam, fFlags);
325
326	return VINF_SUCCESS;
327	#else /* !PGM_DYNAMIC_RAM_ALLOC */
328	AssertReleaseMsgFailed(("Shouldn't ever get here when PGM_DYNAMIC_RAM_ALLOC isn't defined!\n"));
329	return VERR_INTERNAL_ERROR;
330	#endif /* !PGM_DYNAMIC_RAM_ALLOC */
331	}
332
333
334	/**
335	* Allocate missing physical pages for an existing guest RAM range.
336	*
337	* @returns VBox status.
338	* @param pVM The VM handle.
339	* @param GCPhys GC physical address of the RAM range. (page aligned)
340	*/
341	PGMR3DECL(int) PGM3PhysGrowRange(PVM pVM, RTGCPHYS GCPhys)
342	{
343	/*
344	* Walk range list.
345	*/
346	pgmLock(pVM);
347
348	PPGMRAMRANGE pRam = CTXSUFF(pVM->pgm.s.pRamRanges);
349	while (pRam)
350	{
351	RTGCPHYS off = GCPhys - pRam->GCPhys;
352	if ( off < pRam->cb
353	&& (pRam->fFlags & MM_RAM_FLAGS_DYNAMIC_ALLOC))
354	{
355	bool fRangeExists = false;
356	unsigned off = (GCPhys - pRam->GCPhys) >> PGM_DYNAMIC_CHUNK_SHIFT;
357
358	/** @note A request made from another thread may end up in EMT after somebody else has already allocated the range. */
359	if (pRam->pavHCChunkHC[off])
360	fRangeExists = true;
361
362	pgmUnlock(pVM);
363	if (fRangeExists)
364	return VINF_SUCCESS;
365	return pgmr3PhysGrowRange(pVM, GCPhys);
366	}
367
368	pRam = CTXSUFF(pRam->pNext);
369	}
370	pgmUnlock(pVM);
371	return VERR_PGM_INVALID_GC_PHYSICAL_ADDRESS;
372	}
373
374	#ifndef NEW_PHYS_CODE
375
376	/**
377	* Allocate missing physical pages for an existing guest RAM range.
378	*
379	* @returns VBox status.
380	* @param pVM The VM handle.
381	* @param pRamRange RAM range
382	* @param GCPhys GC physical address of the RAM range. (page aligned)
383	*/
384	int pgmr3PhysGrowRange(PVM pVM, RTGCPHYS GCPhys)
385	{
386	void *pvRam;
387	int rc;
388
389	/* We must execute this function in the EMT thread, otherwise we'll run into problems. */
390	if (!VM_IS_EMT(pVM))
391	{
392	PVMREQ pReq;
393
394	AssertMsg(!PDMCritSectIsOwner(&pVM->pgm.s.CritSect), ("We own the PGM lock -> deadlock danger!!\n"));
395
396	rc = VMR3ReqCall(pVM, &pReq, RT_INDEFINITE_WAIT, (PFNRT)PGM3PhysGrowRange, 2, pVM, GCPhys);
397	if (VBOX_SUCCESS(rc))
398	{
399	rc = pReq->iStatus;
400	VMR3ReqFree(pReq);
401	}
402	return rc;
403	}
404
405	/* Round down to chunk boundary */
406	GCPhys = GCPhys & PGM_DYNAMIC_CHUNK_BASE_MASK;
407
408	STAM_COUNTER_INC(&pVM->pgm.s.StatDynRamGrow);
409	STAM_COUNTER_ADD(&pVM->pgm.s.StatDynRamTotal, PGM_DYNAMIC_CHUNK_SIZE/(1024*1024));
410
411	Log(("pgmr3PhysGrowRange: allocate chunk of size 0x%X at %VGp\n", PGM_DYNAMIC_CHUNK_SIZE, GCPhys));
412
413	unsigned cPages = PGM_DYNAMIC_CHUNK_SIZE >> PAGE_SHIFT;
414	rc = SUPPageAlloc(cPages, &pvRam);
415	if (VBOX_SUCCESS(rc))
416	{
417	VMSTATE enmVMState = VMR3GetState(pVM);
418
419	rc = MMR3PhysRegisterEx(pVM, pvRam, GCPhys, PGM_DYNAMIC_CHUNK_SIZE, 0, MM_PHYS_TYPE_DYNALLOC_CHUNK, "Main Memory");
420	if ( VBOX_SUCCESS(rc)
421	\|\| enmVMState != VMSTATE_RUNNING)
422	{
423	if (VBOX_FAILURE(rc))
424	{
425	AssertMsgFailed(("Out of memory while trying to allocate a guest RAM chunk at %VGp!\n", GCPhys));
426	LogRel(("PGM: Out of memory while trying to allocate a guest RAM chunk at %VGp (VMstate=%s)!\n", GCPhys, VMR3GetStateName(enmVMState)));
427	}
428	return rc;
429	}
430
431	SUPPageFree(pvRam, cPages);
432
433	LogRel(("pgmr3PhysGrowRange: out of memory. pause until the user resumes execution.\n"));
434
435	/* Pause first, then inform Main. */
436	rc = VMR3SuspendNoSave(pVM);
437	AssertRC(rc);
438
439	VMSetRuntimeError(pVM, false, "HostMemoryLow", "Unable to allocate and lock memory. The virtual machine will be paused. Please close applications to free up memory or close the VM.");
440
441	/* Wait for resume event; will only return in that case. If the VM is stopped, the EMT thread will be destroyed. */
442	rc = VMR3WaitForResume(pVM);
443
444	/* Retry */
445	LogRel(("pgmr3PhysGrowRange: VM execution resumed -> retry.\n"));
446	return pgmr3PhysGrowRange(pVM, GCPhys);
447	}
448	return rc;
449	}
450
451	#endif /* !NEW_PHYS_CODE */
452
453	/**
454	* Interface MMIO handler relocation calls.
455	*
456	* It relocates an existing physical memory range with PGM.
457	*
458	* @returns VBox status.
459	* @param pVM The VM handle.
460	* @param GCPhysOld Previous GC physical address of the RAM range. (page aligned)
461	* @param GCPhysNew New GC physical address of the RAM range. (page aligned)
462	* @param cb Size of the RAM range. (page aligned)
463	*/
464	PGMR3DECL(int) PGMR3PhysRelocate(PVM pVM, RTGCPHYS GCPhysOld, RTGCPHYS GCPhysNew, size_t cb)
465	{
466	/*
467	* Validate input.
468	* (Not so important because callers are only MMR3PhysRelocate(),
469	* but anyway...)
470	*/
471	Log(("PGMR3PhysRelocate Old %VGp New %VGp (%#x bytes)\n", GCPhysOld, GCPhysNew, cb));
472
473	Assert(RT_ALIGN_Z(cb, PAGE_SIZE) == cb && cb);
474	Assert(RT_ALIGN_T(GCPhysOld, PAGE_SIZE, RTGCPHYS) == GCPhysOld);
475	Assert(RT_ALIGN_T(GCPhysNew, PAGE_SIZE, RTGCPHYS) == GCPhysNew);
476	RTGCPHYS GCPhysLast;
477	GCPhysLast = GCPhysOld + (cb - 1);
478	if (GCPhysLast < GCPhysOld)
479	{
480	AssertMsgFailed(("The old range wraps! GCPhys=%VGp cb=%#x\n", GCPhysOld, cb));
481	return VERR_INVALID_PARAMETER;
482	}
483	GCPhysLast = GCPhysNew + (cb - 1);
484	if (GCPhysLast < GCPhysNew)
485	{
486	AssertMsgFailed(("The new range wraps! GCPhys=%VGp cb=%#x\n", GCPhysNew, cb));
487	return VERR_INVALID_PARAMETER;
488	}
489
490	/*
491	* Find and remove old range location.
492	*/
493	pgmLock(pVM);
494	PPGMRAMRANGE pPrev = NULL;
495	PPGMRAMRANGE pCur = pVM->pgm.s.pRamRangesHC;
496	while (pCur)
497	{
498	if (pCur->GCPhys == GCPhysOld && pCur->cb == cb)
499	break;
500
501	/* next */
502	pPrev = pCur;
503	pCur = pCur->pNextHC;
504	}
505	if (pPrev)
506	{
507	pPrev->pNextHC = pCur->pNextHC;
508	pPrev->pNextGC = pCur->pNextGC;
509	}
510	else
511	{
512	pVM->pgm.s.pRamRangesHC = pCur->pNextHC;
513	pVM->pgm.s.pRamRangesGC = pCur->pNextGC;
514	}
515
516	/*
517	* Update the range.
518	*/
519	pCur->GCPhys = GCPhysNew;
520	pCur->GCPhysLast= GCPhysLast;
521	PPGMRAMRANGE pNew = pCur;
522
523	/*
524	* Find range location and check for conflicts.
525	*/
526	pPrev = NULL;
527	pCur = pVM->pgm.s.pRamRangesHC;
528	while (pCur)
529	{
530	if (GCPhysNew <= pCur->GCPhysLast && GCPhysLast >= pCur->GCPhys)
531	{
532	AssertMsgFailed(("Conflict! This cannot happen!\n"));
533	pgmUnlock(pVM);
534	return VERR_PGM_RAM_CONFLICT;
535	}
536	if (GCPhysLast < pCur->GCPhys)
537	break;
538
539	/* next */
540	pPrev = pCur;
541	pCur = pCur->pNextHC;
542	}
543
544	/*
545	* Reinsert the RAM range.
546	*/
547	pNew->pNextHC = pCur;
548	pNew->pNextGC = pCur ? MMHyperHC2GC(pVM, pCur) : 0;
549	if (pPrev)
550	{
551	pPrev->pNextHC = pNew;
552	pPrev->pNextGC = MMHyperHC2GC(pVM, pNew);
553	}
554	else
555	{
556	pVM->pgm.s.pRamRangesHC = pNew;
557	pVM->pgm.s.pRamRangesGC = MMHyperHC2GC(pVM, pNew);
558	}
559
560	pgmUnlock(pVM);
561	return VINF_SUCCESS;
562	}
563
564
565	/**
566	* Interface MMR3RomRegister() and MMR3PhysReserve calls to update the
567	* flags of existing RAM ranges.
568	*
569	* @returns VBox status.
570	* @param pVM The VM handle.
571	* @param GCPhys GC physical address of the RAM range. (page aligned)
572	* @param cb Size of the RAM range. (page aligned)
573	* @param fFlags The Or flags, MM_RAM_* \#defines.
574	* @param fMask The and mask for the flags.
575	*/
576	PGMR3DECL(int) PGMR3PhysSetFlags(PVM pVM, RTGCPHYS GCPhys, size_t cb, unsigned fFlags, unsigned fMask)
577	{
578	Log(("PGMR3PhysSetFlags %08X %x %x %x\n", GCPhys, cb, fFlags, fMask));
579
580	/*
581	* Validate input.
582	* (Not so important because caller is always MMR3RomRegister() and MMR3PhysReserve(), but anyway...)
583	*/
584	Assert(!(fFlags & ~(MM_RAM_FLAGS_RESERVED \| MM_RAM_FLAGS_ROM \| MM_RAM_FLAGS_MMIO \| MM_RAM_FLAGS_MMIO2)));
585	Assert(RT_ALIGN_Z(cb, PAGE_SIZE) == cb && cb);
586	Assert(RT_ALIGN_T(GCPhys, PAGE_SIZE, RTGCPHYS) == GCPhys);
587	RTGCPHYS GCPhysLast = GCPhys + (cb - 1);
588	AssertReturn(GCPhysLast > GCPhys, VERR_INVALID_PARAMETER);
589
590	/*
591	* Lookup the range.
592	*/
593	PPGMRAMRANGE pRam = CTXSUFF(pVM->pgm.s.pRamRanges);
594	while (pRam && GCPhys > pRam->GCPhysLast)
595	pRam = CTXSUFF(pRam->pNext);
596	if ( !pRam
597	\|\| GCPhys > pRam->GCPhysLast
598	\|\| GCPhysLast < pRam->GCPhys)
599	{
600	AssertMsgFailed(("No RAM range for %VGp-%VGp\n", GCPhys, GCPhysLast));
601	return VERR_INVALID_PARAMETER;
602	}
603
604	/*
605	* Update the requested flags.
606	*/
607	RTHCPHYS fFullMask = ~(RTHCPHYS)(MM_RAM_FLAGS_RESERVED \| MM_RAM_FLAGS_ROM \| MM_RAM_FLAGS_MMIO \| MM_RAM_FLAGS_MMIO2)
608	\| fMask;
609	unsigned iPageEnd = (GCPhysLast - pRam->GCPhys + 1) >> PAGE_SHIFT;
610	unsigned iPage = (GCPhys - pRam->GCPhys) >> PAGE_SHIFT;
611	for ( ; iPage < iPageEnd; iPage++)
612	pRam->aPages[iPage].HCPhys = (pRam->aPages[iPage].HCPhys & fFullMask) \| fFlags; /** @todo PAGE FLAGS */
613
614	return VINF_SUCCESS;
615	}
616
617
618	/**
619	* Sets the Address Gate 20 state.
620	*
621	* @param pVM VM handle.
622	* @param fEnable True if the gate should be enabled.
623	* False if the gate should be disabled.
624	*/
625	PGMDECL(void) PGMR3PhysSetA20(PVM pVM, bool fEnable)
626	{
627	LogFlow(("PGMR3PhysSetA20 %d (was %d)\n", fEnable, pVM->pgm.s.fA20Enabled));
628	if (pVM->pgm.s.fA20Enabled != (RTUINT)fEnable)
629	{
630	pVM->pgm.s.fA20Enabled = fEnable;
631	pVM->pgm.s.GCPhysA20Mask = ~(RTGCPHYS)(!fEnable << 20);
632	REMR3A20Set(pVM, fEnable);
633	}
634	}
635
636
637	/**
638	* Tree enumeration callback for dealing with age rollover.
639	* It will perform a simple compression of the current age.
640	*/
641	static DECLCALLBACK(int) pgmR3PhysChunkAgeingRolloverCallback(PAVLU32NODECORE pNode, void *pvUser)
642	{
643	/* Age compression - ASSUMES iNow == 4. */
644	PPGMCHUNKR3MAP pChunk = (PPGMCHUNKR3MAP)pNode;
645	if (pChunk->iAge >= UINT32_C(0xffffff00))
646	pChunk->iAge = 3;
647	else if (pChunk->iAge >= UINT32_C(0xfffff000))
648	pChunk->iAge = 2;
649	else if (pChunk->iAge)
650	pChunk->iAge = 1;
651	else /* iAge = 0 */
652	pChunk->iAge = 4;
653
654	/* reinsert */
655	PVM pVM = (PVM)pvUser;
656	RTAvllU32Remove(&pVM->pgm.s.ChunkR3Map.pAgeTree, pChunk->AgeCore.Key);
657	pChunk->AgeCore.Key = pChunk->iAge;
658	RTAvllU32Insert(&pVM->pgm.s.ChunkR3Map.pAgeTree, &pChunk->AgeCore);
659	return 0;
660	}
661
662
663	/**
664	* Tree enumeration callback that updates the chunks that have
665	* been used since the last
666	*/
667	static DECLCALLBACK(int) pgmR3PhysChunkAgeingCallback(PAVLU32NODECORE pNode, void *pvUser)
668	{
669	PPGMCHUNKR3MAP pChunk = (PPGMCHUNKR3MAP)pNode;
670	if (!pChunk->iAge)
671	{
672	PVM pVM = (PVM)pvUser;
673	RTAvllU32Remove(&pVM->pgm.s.ChunkR3Map.pAgeTree, pChunk->AgeCore.Key);
674	pChunk->AgeCore.Key = pChunk->iAge = pVM->pgm.s.ChunkR3Map.iNow;
675	RTAvllU32Insert(&pVM->pgm.s.ChunkR3Map.pAgeTree, &pChunk->AgeCore);
676	}
677
678	return 0;
679	}
680
681
682	/**
683	* Performs ageing of the ring-3 chunk mappings.
684	*
685	* @param pVM The VM handle.
686	*/
687	PGMR3DECL(void) PGMR3PhysChunkAgeing(PVM pVM)
688	{
689	pVM->pgm.s.ChunkR3Map.AgeingCountdown = RT_MIN(pVM->pgm.s.ChunkR3Map.cMax / 4, 1024);
690	pVM->pgm.s.ChunkR3Map.iNow++;
691	if (pVM->pgm.s.ChunkR3Map.iNow == 0)
692	{
693	pVM->pgm.s.ChunkR3Map.iNow = 4;
694	RTAvlU32DoWithAll(&pVM->pgm.s.ChunkR3Map.pTree, true /fFromLeft/, pgmR3PhysChunkAgeingRolloverCallback, pVM);
695	}
696	else
697	RTAvlU32DoWithAll(&pVM->pgm.s.ChunkR3Map.pTree, true /fFromLeft/, pgmR3PhysChunkAgeingCallback, pVM);
698	}
699
700
701	/**
702	* The structure passed in the pvUser argument of pgmR3PhysChunkUnmapCandidateCallback().
703	*/
704	typedef struct PGMR3PHYSCHUNKUNMAPCB
705	{
706	PVM pVM; /*< The VM handle. /
707	PPGMCHUNKR3MAP pChunk; /*< The chunk to unmap. /
708	} PGMR3PHYSCHUNKUNMAPCB, *PPGMR3PHYSCHUNKUNMAPCB;
709
710
711	/**
712	* Callback used to find the mapping that's been unused for
713	* the longest time.
714	*/
715	static DECLCALLBACK(int) pgmR3PhysChunkUnmapCandidateCallback(PAVLLU32NODECORE pNode, void *pvUser)
716	{
717	do
718	{
719	PPGMCHUNKR3MAP pChunk = (PPGMCHUNKR3MAP)((uint8_t *)pNode - RT_OFFSETOF(PGMCHUNKR3MAP, AgeCore));
720	if ( pChunk->iAge
721	&& !pChunk->cRefs)
722	{
723	/*
724	* Check that it's not in any of the TLBs.
725	*/
726	PVM pVM = ((PPGMR3PHYSCHUNKUNMAPCB)pvUser)->pVM;
727	for (unsigned i = 0; i < RT_ELEMENTS(pVM->pgm.s.ChunkR3Map.Tlb.aEntries); i++)
728	if (pVM->pgm.s.ChunkR3Map.Tlb.aEntries[i].pChunk == pChunk)
729	{
730	pChunk = NULL;
731	break;
732	}
733	if (pChunk)
734	for (unsigned i = 0; i < RT_ELEMENTS(pVM->pgm.s.PhysTlbHC.aEntries); i++)
735	if (pVM->pgm.s.PhysTlbHC.aEntries[i].pMap == pChunk)
736	{
737	pChunk = NULL;
738	break;
739	}
740	if (pChunk)
741	{
742	((PPGMR3PHYSCHUNKUNMAPCB)pvUser)->pChunk = pChunk;
743	return 1; /* done */
744	}
745	}
746
747	/* next with the same age - this version of the AVL API doesn't enumerate the list, so we have to do it. */
748	pNode = pNode->pList;
749	} while (pNode);
750	return 0;
751	}
752
753
754	/**
755	* Finds a good candidate for unmapping when the ring-3 mapping cache is full.
756	*
757	* The candidate will not be part of any TLBs, so no need to flush
758	* anything afterwards.
759	*
760	* @returns Chunk id.
761	* @param pVM The VM handle.
762	*/
763	static int32_t pgmR3PhysChunkFindUnmapCandidate(PVM pVM)
764	{
765	/*
766	* Do tree ageing first?
767	*/
768	if (pVM->pgm.s.ChunkR3Map.AgeingCountdown-- == 0)
769	PGMR3PhysChunkAgeing(pVM);
770
771	/*
772	* Enumerate the age tree starting with the left most node.
773	*/
774	PGMR3PHYSCHUNKUNMAPCB Args;
775	Args.pVM = pVM;
776	Args.pChunk = NULL;
777	if (RTAvllU32DoWithAll(&pVM->pgm.s.ChunkR3Map.pAgeTree, true /fFromLeft/, pgmR3PhysChunkUnmapCandidateCallback, pVM))
778	return Args.pChunk->Core.Key;
779	return INT32_MAX;
780	}
781
782
783	/**
784	* Argument package for the VMMR0_DO_GMM_MAP_UNMAP_CHUNK request.
785	*/
786	typedef struct GMMMAPUNMAPCHUNKREQ
787	{
788	/** The header. */
789	SUPVMMR0REQHDR Hdr;
790	/** The chunk to map, UINT32_MAX if unmap only. (IN) */
791	uint32_t idChunkMap;
792	/** The chunk to unmap, UINT32_MAX if map only. (IN) */
793	uint32_t idChunkUnmap;
794	/** Where the mapping address is returned. (OUT) */
795	RTR3PTR pvR3;
796	} GMMMAPUNMAPCHUNKREQ;
797
798
799	/**
800	* Maps the given chunk into the ring-3 mapping cache.
801	*
802	* This will call ring-0.
803	*
804	* @returns VBox status code.
805	* @param pVM The VM handle.
806	* @param idChunk The chunk in question.
807	* @param ppChunk Where to store the chunk tracking structure.
808	*
809	* @remarks Called from within the PGM critical section.
810	*/
811	int pgmR3PhysChunkMap(PVM pVM, uint32_t idChunk, PPPGMCHUNKR3MAP ppChunk)
812	{
813	int rc;
814	/*
815	* Allocate a new tracking structure first.
816	*/
817	#if 0 /* for later when we've got a separate mapping method for ring-0. */
818	PPGMCHUNKR3MAP pChunk = (PPGMCHUNKR3MAP)MMR3HeapAlloc(pVM, MM_TAG_PGM_CHUNK_MAPPING, sizeof(*pChunk));
819	AssertReturn(pChunk, VERR_NO_MEMORY);
820	#else
821	PPGMCHUNKR3MAP pChunk;
822	rc = MMHyperAlloc(pVM, sizeof(pChunk), 0, MM_TAG_PGM_CHUNK_MAPPING, (void *)&pChunk);
823	AssertRCReturn(rc, rc);
824	#endif
825	pChunk->Core.Key = idChunk;
826	pChunk->AgeCore.Key = pVM->pgm.s.ChunkR3Map.iNow;
827	pChunk->iAge = 0;
828	pChunk->cRefs = 0;
829	pChunk->cPermRefs = 0;
830	pChunk->pv = NULL;
831
832	/*
833	* Request the ring-0 part to map the chunk in question and if
834	* necessary unmap another one to make space in the mapping cache.
835	*/
836	GMMMAPUNMAPCHUNKREQ Req;
837	Req.Hdr.u32Magic = SUPVMMR0REQHDR_MAGIC;
838	Req.Hdr.cbReq = sizeof(Req);
839	Req.pvR3 = NULL;
840	Req.idChunkMap = idChunk;
841	Req.idChunkUnmap = INT32_MAX;
842	if (pVM->pgm.s.ChunkR3Map.c >= pVM->pgm.s.ChunkR3Map.cMax)
843	Req.idChunkUnmap = pgmR3PhysChunkFindUnmapCandidate(pVM);
844	rc = SUPCallVMMR0Ex(pVM->pVMR0, VMMR0_DO_GMM_MAP_UNMAP_CHUNK, 0, &Req.Hdr);
845	if (VBOX_SUCCESS(rc))
846	{
847	/*
848	* Update the tree.
849	*/
850	/* insert the new one. */
851	AssertPtr(Req.pvR3);
852	pChunk->pv = Req.pvR3;
853	bool fRc = RTAvlU32Insert(&pVM->pgm.s.ChunkR3Map.pTree, &pChunk->Core);
854	AssertRelease(fRc);
855	pVM->pgm.s.ChunkR3Map.c++;
856
857	fRc = RTAvllU32Insert(&pVM->pgm.s.ChunkR3Map.pAgeTree, &pChunk->AgeCore);
858	AssertRelease(fRc);
859
860	/* remove the unmapped one. */
861	if (Req.idChunkUnmap != INT32_MAX)
862	{
863	PPGMCHUNKR3MAP pUnmappedChunk = (PPGMCHUNKR3MAP)RTAvlU32Remove(&pVM->pgm.s.ChunkR3Map.pTree, Req.idChunkUnmap);
864	AssertRelease(pUnmappedChunk);
865	pUnmappedChunk->pv = NULL;
866	pUnmappedChunk->Core.Key = UINT32_MAX;
867	#if 0 /* for later when we've got a separate mapping method for ring-0. */
868	MMR3HeapFree(pUnmappedChunk);
869	#else
870	MMHyperFree(pVM, pUnmappedChunk);
871	#endif
872	pVM->pgm.s.ChunkR3Map.c--;
873	}
874	}
875	else
876	{
877	AssertRC(rc);
878	#if 0 /* for later when we've got a separate mapping method for ring-0. */
879	MMR3HeapFree(pChunk);
880	#else
881	MMHyperFree(pVM, pChunk);
882	#endif
883	pChunk = NULL;
884	}
885
886	*ppChunk = pChunk;
887	return rc;
888	}
889
890
891	/**
892	* For VMMCALLHOST_PGM_MAP_CHUNK, considered internal.
893	*
894	* @returns see pgmR3PhysChunkMap.
895	* @param pVM The VM handle.
896	* @param idChunk The chunk to map.
897	*/
898	PDMR3DECL(int) PGMR3PhysChunkMap(PVM pVM, uint32_t idChunk)
899	{
900	PPGMCHUNKR3MAP pChunk;
901	return pgmR3PhysChunkMap(pVM, idChunk, &pChunk);
902	}
903
904
905	/**
906	* Invalidates the TLB for the ring-3 mapping cache.
907	*
908	* @param pVM The VM handle.
909	*/
910	PGMR3DECL(void) PGMR3PhysChunkInvalidateTLB(PVM pVM)
911	{
912	pgmLock(pVM);
913	for (unsigned i = 0; i < RT_ELEMENTS(pVM->pgm.s.ChunkR3Map.Tlb.aEntries); i++)
914	{
915	pVM->pgm.s.ChunkR3Map.Tlb.aEntries[i].idChunk = NIL_GMM_CHUNKID;
916	pVM->pgm.s.ChunkR3Map.Tlb.aEntries[i].pChunk = NULL;
917	}
918	pgmUnlock(pVM);
919	}
920
921
922	/**
923	* Response to VM_FF_PGM_NEED_HANDY_PAGES and VMMCALLHOST_PGM_ALLOCATE_HANDY_PAGES.
924	*
925	* @returns The following VBox status codes.
926	* @retval VINF_SUCCESS on success. FF cleared.
927	* @retval VINF_EM_NO_MEMORY if we're out of memory. The FF is not cleared in this case.
928	*
929	* @param pVM The VM handle.
930	*/
931	PDMR3DECL(int) PGMR3PhysAllocateHandyPages(PVM pVM)
932	{
933	pgmLock(pVM);
934	int rc = SUPCallVMMR0Ex(pVM->pVMR0, VMMR0_DO_PGM_ALLOCATE_HANDY_PAGES, 0, NULL);
935	if (rc == VERR_GMM_SEED_ME)
936	{
937	void *pvChunk;
938	rc = SUPPageAlloc(GMM_CHUNK_SIZE >> PAGE_SHIFT, &pvChunk);
939	if (VBOX_SUCCESS(rc))
940	rc = SUPCallVMMR0Ex(pVM->pVMR0, VMMR0_DO_GMM_SEED_CHUNK, (uintptr_t)pvChunk, NULL);
941	if (VBOX_FAILURE(rc))
942	{
943	LogRel(("PGM: GMM Seeding failed, rc=%Vrc\n", rc));
944	rc = VINF_EM_NO_MEMORY;
945	}
946	}
947	pgmUnlock(pVM);
948	Assert(rc == VINF_SUCCESS \|\| rc == VINF_EM_NO_MEMORY);
949	return rc;
950	}
951

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source: vbox/trunk/src/VBox/VMM/PGMPhys.cpp@ 4953

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