MM.cpp@ 18746

Last change on this file since 18746 was 18718, checked in by vboxsync, 16 years ago
MM: cleaned out MMLOCKEDMEM stuff (only user was MMR3HyperMapPages).
Property svn:eol-style set to `native` Property svn:keywords set to `Id`
File size: 29.2 KB

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1	/* $Id: MM.cpp 18718 2009-04-05 13:47:09Z vboxsync $ */
2	/** @file
3	* MM - Memory Manager.
4	*/
5
6	/*
7	* Copyright (C) 2006-2007 Sun Microsystems, Inc.
8	*
9	* This file is part of VirtualBox Open Source Edition (OSE), as
10	* available from http://www.virtualbox.org. This file is free software;
11	* you can redistribute it and/or modify it under the terms of the GNU
12	* General Public License (GPL) as published by the Free Software
13	* Foundation, in version 2 as it comes in the "COPYING" file of the
14	* VirtualBox OSE distribution. VirtualBox OSE is distributed in the
15	* hope that it will be useful, but WITHOUT ANY WARRANTY of any kind.
16	*
17	* Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa
18	* Clara, CA 95054 USA or visit http://www.sun.com if you need
19	* additional information or have any questions.
20	*/
21
22
23	/** @page pg_mm MM - The Memory Manager
24	*
25	* The memory manager is in charge of the following memory:
26	* - Hypervisor Memory Area (HMA) - Address space management.
27	* - Hypervisor Heap - A memory heap that lives in all contexts.
28	* - Tagged ring-3 heap.
29	* - Page pools - Primarily used by PGM for shadow page tables.
30	* - Locked process memory - Guest RAM and other. (reduce/obsolete this)
31	* - Physical guest memory (RAM & ROM) - Moving to PGM. (obsolete this)
32	*
33	* The global memory manager (GMM) is the global counter part / partner of MM.
34	* MM will provide therefore ring-3 callable interfaces for some of the GMM APIs
35	* related to resource tracking (PGM is the user).
36	*
37	* @see grp_mm
38	*
39	*
40	* @section sec_mm_hma Hypervisor Memory Area
41	*
42	* The HMA is used when executing in raw-mode. We borrow, with the help of
43	* PGMMap, some unused space (one or more page directory entries to be precise)
44	* in the guest's virtual memory context. PGM will monitor the guest's virtual
45	* address space for changes and relocate the HMA when required.
46	*
47	* To give some idea what's in the HMA, study the 'info hma' output:
48	* @verbatim
49	VBoxDbg> info hma
50	Hypervisor Memory Area (HMA) Layout: Base 00000000a0000000, 0x00800000 bytes
51	00000000a05cc000-00000000a05cd000 DYNAMIC fence
52	00000000a05c4000-00000000a05cc000 DYNAMIC Dynamic mapping
53	00000000a05c3000-00000000a05c4000 DYNAMIC fence
54	00000000a05b8000-00000000a05c3000 DYNAMIC Paging
55	00000000a05b6000-00000000a05b8000 MMIO2 0000000000000000 PCNetShMem
56	00000000a0536000-00000000a05b6000 MMIO2 0000000000000000 VGA VRam
57	00000000a0523000-00000000a0536000 00002aaab3d0c000 LOCKED autofree alloc once (PDM_DEVICE)
58	00000000a0522000-00000000a0523000 DYNAMIC fence
59	00000000a051e000-00000000a0522000 00002aaab36f5000 LOCKED autofree VBoxDD2GC.gc
60	00000000a051d000-00000000a051e000 DYNAMIC fence
61	00000000a04eb000-00000000a051d000 00002aaab36c3000 LOCKED autofree VBoxDDGC.gc
62	00000000a04ea000-00000000a04eb000 DYNAMIC fence
63	00000000a04e9000-00000000a04ea000 00002aaab36c2000 LOCKED autofree ram range (High ROM Region)
64	00000000a04e8000-00000000a04e9000 DYNAMIC fence
65	00000000a040e000-00000000a04e8000 00002aaab2e6d000 LOCKED autofree VMMGC.gc
66	00000000a0208000-00000000a040e000 00002aaab2c67000 LOCKED autofree alloc once (PATM)
67	00000000a01f7000-00000000a0208000 00002aaaab92d000 LOCKED autofree alloc once (SELM)
68	00000000a01e7000-00000000a01f7000 00002aaaab5e8000 LOCKED autofree alloc once (SELM)
69	00000000a01e6000-00000000a01e7000 DYNAMIC fence
70	00000000a01e5000-00000000a01e6000 00002aaaab5e7000 HCPHYS 00000000c363c000 Core Code
71	00000000a01e4000-00000000a01e5000 DYNAMIC fence
72	00000000a01e3000-00000000a01e4000 00002aaaaab26000 HCPHYS 00000000619cf000 GIP
73	00000000a01a2000-00000000a01e3000 00002aaaabf32000 LOCKED autofree alloc once (PGM_PHYS)
74	00000000a016b000-00000000a01a2000 00002aaab233f000 LOCKED autofree alloc once (PGM_POOL)
75	00000000a016a000-00000000a016b000 DYNAMIC fence
76	00000000a0165000-00000000a016a000 DYNAMIC CR3 mapping
77	00000000a0164000-00000000a0165000 DYNAMIC fence
78	00000000a0024000-00000000a0164000 00002aaab215f000 LOCKED autofree Heap
79	00000000a0023000-00000000a0024000 DYNAMIC fence
80	00000000a0001000-00000000a0023000 00002aaab1d24000 LOCKED pages VM
81	00000000a0000000-00000000a0001000 DYNAMIC fence
82	@endverbatim
83	*
84	*
85	* @section sec_mm_hyperheap Hypervisor Heap
86	*
87	* The heap is accessible from ring-3, ring-0 and the raw-mode context. That
88	* said, it's not necessarily mapped into ring-0 on if that's possible since we
89	* don't wish to waste kernel address space without a good reason.
90	*
91	* Allocations within the heap are always in the same relative position in all
92	* contexts, so, it's possible to use offset based linking. In fact, the heap is
93	* internally using offset based linked lists tracking heap blocks. We use
94	* offset linked AVL trees and lists in a lot of places where share structures
95	* between RC, R3 and R0, so this is a strict requirement of the heap. However
96	* this means that we cannot easily extend the heap since the extension won't
97	* necessarily be in the continuation of the current heap memory in all (or any)
98	* context.
99	*
100	* All allocations are tagged. Per tag allocation statistics will be maintaing
101	* and exposed thru STAM when VBOX_WITH_STATISTICS is defined.
102	*
103	*
104	* @section sec_mm_r3heap Tagged Ring-3 Heap
105	*
106	* The ring-3 heap is a wrapper around the RTMem API adding allocation
107	* statistics and automatic cleanup on VM destruction.
108	*
109	* Per tag allocation statistics will be maintaing and exposed thru STAM when
110	* VBOX_WITH_STATISTICS is defined.
111	*
112	*
113	* @section sec_mm_page Page Pool
114	*
115	* The MM manages a page pool from which other components can allocate locked,
116	* page aligned and page sized memory objects. The pool provides facilities to
117	* convert back and forth between (host) physical and virtual addresses (within
118	* the pool of course). Several specialized interfaces are provided for the most
119	* common alloctions and convertions to save the caller from bothersome casting
120	* and extra parameter passing.
121	*
122	*
123	* @section sec_mm_locked Locked Process Memory
124	*
125	* MM manages the locked process memory. This is used for a bunch of things
126	* (count the LOCKED entries in the'info hma' output found in @ref sec_mm_hma),
127	* but the main consumer of memory is currently for guest RAM. There is an
128	* ongoing rewrite that will move all the guest RAM allocation to PGM and
129	* GMM.
130	*
131	* The locking of memory is something doing in cooperation with the VirtualBox
132	* support driver, SUPDrv (aka. VBoxDrv), thru the support library API,
133	* SUPR3 (aka. SUPLib).
134	*
135	*
136	* @section sec_mm_phys Physical Guest Memory
137	*
138	* MM is currently managing the physical memory for the guest. It relies heavily
139	* on PGM for this. There is an ongoing rewrite that will move this to PGM. (The
140	* rewrite is driven by the need for more flexible guest ram allocation, but
141	* also motivated by the fact that MMPhys is just adding stupid bureaucracy and
142	* that MMR3PhysReserve is a totally weird artifact that must go away.)
143	*
144	*/
145
146
147	/*******************************************************************************
148	* Header Files *
149	*******************************************************************************/
150	#define LOG_GROUP LOG_GROUP_MM
151	#include <VBox/mm.h>
152	#include <VBox/pgm.h>
153	#include <VBox/cfgm.h>
154	#include <VBox/ssm.h>
155	#include <VBox/gmm.h>
156	#include "MMInternal.h"
157	#include <VBox/vm.h>
158	#include <VBox/uvm.h>
159	#include <VBox/err.h>
160	#include <VBox/param.h>
161
162	#include <VBox/log.h>
163	#include <iprt/alloc.h>
164	#include <iprt/assert.h>
165	#include <iprt/string.h>
166
167
168	/*******************************************************************************
169	* Defined Constants And Macros *
170	*******************************************************************************/
171	/** The current saved state versino of MM. */
172	#define MM_SAVED_STATE_VERSION 2
173
174
175	/*******************************************************************************
176	* Internal Functions *
177	*******************************************************************************/
178	static DECLCALLBACK(int) mmR3Save(PVM pVM, PSSMHANDLE pSSM);
179	static DECLCALLBACK(int) mmR3Load(PVM pVM, PSSMHANDLE pSSM, uint32_t u32Version);
180
181
182
183
184	/**
185	* Initializes the MM members of the UVM.
186	*
187	* This is currently only the ring-3 heap.
188	*
189	* @returns VBox status code.
190	* @param pUVM Pointer to the user mode VM structure.
191	*/
192	VMMR3DECL(int) MMR3InitUVM(PUVM pUVM)
193	{
194	/*
195	* Assert sizes and order.
196	*/
197	AssertCompile(sizeof(pUVM->mm.s) <= sizeof(pUVM->mm.padding));
198	AssertRelease(sizeof(pUVM->mm.s) <= sizeof(pUVM->mm.padding));
199	Assert(!pUVM->mm.s.pHeap);
200
201	/*
202	* Init the heap.
203	*/
204	return mmR3HeapCreateU(pUVM, &pUVM->mm.s.pHeap);
205	}
206
207
208	/**
209	* Initializes the MM.
210	*
211	* MM is managing the virtual address space (among other things) and
212	* setup the hypvervisor memory area mapping in the VM structure and
213	* the hypvervisor alloc-only-heap. Assuming the current init order
214	* and components the hypvervisor memory area looks like this:
215	* -# VM Structure.
216	* -# Hypervisor alloc only heap (also call Hypervisor memory region).
217	* -# Core code.
218	*
219	* MM determins the virtual address of the hypvervisor memory area by
220	* checking for location at previous run. If that property isn't available
221	* it will choose a default starting location, currently 0xa0000000.
222	*
223	* @returns VBox status code.
224	* @param pVM The VM to operate on.
225	*/
226	VMMR3DECL(int) MMR3Init(PVM pVM)
227	{
228	LogFlow(("MMR3Init\n"));
229
230	/*
231	* Assert alignment, sizes and order.
232	*/
233	AssertRelease(!(RT_OFFSETOF(VM, mm.s) & 31));
234	AssertRelease(sizeof(pVM->mm.s) <= sizeof(pVM->mm.padding));
235	AssertMsg(pVM->mm.s.offVM == 0, ("Already initialized!\n"));
236
237	/*
238	* Init the structure.
239	*/
240	pVM->mm.s.offVM = RT_OFFSETOF(VM, mm);
241	pVM->mm.s.offLookupHyper = NIL_OFFSET;
242
243	/*
244	* Init the page pool.
245	*/
246	int rc = mmR3PagePoolInit(pVM);
247	if (RT_SUCCESS(rc))
248	{
249	/*
250	* Init the hypervisor related stuff.
251	*/
252	rc = mmR3HyperInit(pVM);
253	if (RT_SUCCESS(rc))
254	{
255	/*
256	* Register the saved state data unit.
257	*/
258	rc = SSMR3RegisterInternal(pVM, "mm", 1, MM_SAVED_STATE_VERSION, sizeof(uint32_t) * 2,
259	NULL, mmR3Save, NULL,
260	NULL, mmR3Load, NULL);
261	if (RT_SUCCESS(rc))
262	return rc;
263
264	/* .... failure .... */
265	}
266	}
267	MMR3Term(pVM);
268	return rc;
269	}
270
271
272	/**
273	* Initializes the MM parts which depends on PGM being initialized.
274	*
275	* @returns VBox status code.
276	* @param pVM The VM to operate on.
277	* @remark No cleanup necessary since MMR3Term() will be called on failure.
278	*/
279	VMMR3DECL(int) MMR3InitPaging(PVM pVM)
280	{
281	LogFlow(("MMR3InitPaging:\n"));
282
283	/*
284	* Query the CFGM values.
285	*/
286	int rc;
287	PCFGMNODE pMMCfg = CFGMR3GetChild(CFGMR3GetRoot(pVM), "MM");
288	if (!pMMCfg)
289	{
290	rc = CFGMR3InsertNode(CFGMR3GetRoot(pVM), "MM", &pMMCfg);
291	AssertRCReturn(rc, rc);
292	}
293
294	/** @cfgm{RamPreAlloc, boolean, false}
295	* Indicates whether the base RAM should all be allocated before starting
296	* the VM (default), or if it should be allocated when first written to.
297	*/
298	bool fPreAlloc;
299	rc = CFGMR3QueryBool(CFGMR3GetRoot(pVM), "RamPreAlloc", &fPreAlloc);
300	if (rc == VERR_CFGM_VALUE_NOT_FOUND)
301	fPreAlloc = false;
302	else
303	AssertMsgRCReturn(rc, ("Configuration error: Failed to query integer \"RamPreAlloc\", rc=%Rrc.\n", rc), rc);
304
305	/** @cfgm{RamSize, uint64_t, 0, 16TB, 0}
306	* Specifies the size of the base RAM that is to be set up during
307	* VM initialization.
308	*/
309	uint64_t cbRam;
310	rc = CFGMR3QueryU64(CFGMR3GetRoot(pVM), "RamSize", &cbRam);
311	if (rc == VERR_CFGM_VALUE_NOT_FOUND)
312	cbRam = 0;
313	else
314	AssertMsgRCReturn(rc, ("Configuration error: Failed to query integer \"RamSize\", rc=%Rrc.\n", rc), rc);
315	AssertLogRelMsg(!(cbRam & ~X86_PTE_PAE_PG_MASK), ("%RGp X86_PTE_PAE_PG_MASK=%RX64\n", cbRam, X86_PTE_PAE_PG_MASK));
316	AssertLogRelMsgReturn(cbRam <= GMM_GCPHYS_LAST, ("cbRam=%RGp GMM_GCPHYS_LAST=%RX64\n", cbRam, GMM_GCPHYS_LAST), VERR_OUT_OF_RANGE);
317	cbRam &= X86_PTE_PAE_PG_MASK;
318	pVM->mm.s.cbRamBase = cbRam;
319
320	/** @cfgm{RamHoleSize, uint32_t, 0, 4032MB, 512MB}
321	* Specifies the size of the memory hole. The memory hole is used
322	* to avoid mapping RAM to the range normally used for PCI memory regions.
323	* Must be aligned on a 4MB boundrary. */
324	uint32_t cbRamHole;
325	rc = CFGMR3QueryU32Def(CFGMR3GetRoot(pVM), "RamHoleSize", &cbRamHole, MM_RAM_HOLE_SIZE_DEFAULT);
326	AssertLogRelMsgRCReturn(rc, ("Configuration error: Failed to query integer \"RamHoleSize\", rc=%Rrc.\n", rc), rc);
327	AssertLogRelMsgReturn(cbRamHole <= 4032U * _1M,
328	("Configuration error: \"RamHoleSize\"=%#RX32 is too large.\n", cbRamHole), VERR_OUT_OF_RANGE);
329	AssertLogRelMsgReturn(cbRamHole > 16 * _1M,
330	("Configuration error: \"RamHoleSize\"=%#RX32 is too large.\n", cbRamHole), VERR_OUT_OF_RANGE);
331	AssertLogRelMsgReturn(!(cbRamHole & (_4M - 1)),
332	("Configuration error: \"RamHoleSize\"=%#RX32 is misaligned.\n", cbRamHole), VERR_OUT_OF_RANGE);
333	uint64_t const offRamHole = _4G - cbRamHole;
334	if (cbRam < offRamHole)
335	Log(("MM: %RU64 bytes of RAM%s\n", cbRam, fPreAlloc ? " (PreAlloc)" : ""));
336	else
337	Log(("MM: %RU64 bytes of RAM%s with a hole at %RU64 up to 4GB.\n", cbRam, fPreAlloc ? " (PreAlloc)" : "", offRamHole));
338
339	/** @cfgm{MM/Policy, string, no overcommitment}
340	* Specifies the policy to use when reserving memory for this VM. The recognized
341	* value is 'no overcommitment' (default). See GMMPOLICY.
342	*/
343	GMMOCPOLICY enmOcPolicy;
344	char sz[64];
345	rc = CFGMR3QueryString(CFGMR3GetRoot(pVM), "Policy", sz, sizeof(sz));
346	if (RT_SUCCESS(rc))
347	{
348	if ( !RTStrICmp(sz, "no_oc")
349	\|\| !RTStrICmp(sz, "no overcommitment"))
350	enmOcPolicy = GMMOCPOLICY_NO_OC;
351	else
352	return VMSetError(pVM, VERR_INVALID_PARAMETER, RT_SRC_POS, "Unknown \"MM/Policy\" value \"%s\"", sz);
353	}
354	else if (rc == VERR_CFGM_VALUE_NOT_FOUND)
355	enmOcPolicy = GMMOCPOLICY_NO_OC;
356	else
357	AssertMsgRCReturn(rc, ("Configuration error: Failed to query string \"MM/Policy\", rc=%Rrc.\n", rc), rc);
358
359	/** @cfgm{MM/Priority, string, normal}
360	* Specifies the memory priority of this VM. The priority comes into play when the
361	* system is overcommitted and the VMs needs to be milked for memory. The recognized
362	* values are 'low', 'normal' (default) and 'high'. See GMMPRIORITY.
363	*/
364	GMMPRIORITY enmPriority;
365	rc = CFGMR3QueryString(CFGMR3GetRoot(pVM), "Priority", sz, sizeof(sz));
366	if (RT_SUCCESS(rc))
367	{
368	if (!RTStrICmp(sz, "low"))
369	enmPriority = GMMPRIORITY_LOW;
370	else if (!RTStrICmp(sz, "normal"))
371	enmPriority = GMMPRIORITY_NORMAL;
372	else if (!RTStrICmp(sz, "high"))
373	enmPriority = GMMPRIORITY_HIGH;
374	else
375	return VMSetError(pVM, VERR_INVALID_PARAMETER, RT_SRC_POS, "Unknown \"MM/Priority\" value \"%s\"", sz);
376	}
377	else if (rc == VERR_CFGM_VALUE_NOT_FOUND)
378	enmPriority = GMMPRIORITY_NORMAL;
379	else
380	AssertMsgRCReturn(rc, ("Configuration error: Failed to query string \"MM/Priority\", rc=%Rrc.\n", rc), rc);
381
382	/*
383	* Make the initial memory reservation with GMM.
384	*/
385	uint64_t cBasePages = (cbRam >> PAGE_SHIFT) + pVM->mm.s.cBasePages;
386	rc = GMMR3InitialReservation(pVM,
387	RT_MAX(cBasePages + pVM->mm.s.cHandyPages, 1),
388	RT_MAX(pVM->mm.s.cShadowPages, 1),
389	RT_MAX(pVM->mm.s.cFixedPages, 1),
390	enmOcPolicy,
391	enmPriority);
392	if (RT_FAILURE(rc))
393	{
394	if (rc == VERR_GMM_MEMORY_RESERVATION_DECLINED)
395	return VMSetError(pVM, rc, RT_SRC_POS,
396	N_("Insufficient free memory to start the VM (cbRam=%#RX64 enmOcPolicy=%d enmPriority=%d)"),
397	cbRam, enmOcPolicy, enmPriority);
398	return VMSetError(pVM, rc, RT_SRC_POS, "GMMR3InitialReservation(,%#RX64,0,0,%d,%d)",
399	cbRam >> PAGE_SHIFT, enmOcPolicy, enmPriority);
400	}
401
402	/*
403	* If RamSize is 0 we're done now.
404	*/
405	if (cbRam < PAGE_SIZE)
406	{
407	Log(("MM: No RAM configured\n"));
408	return VINF_SUCCESS;
409	}
410
411	/*
412	* Setup the base ram (PGM).
413	*/
414	if (cbRam > offRamHole)
415	{
416	rc = PGMR3PhysRegisterRam(pVM, 0, offRamHole, "Base RAM");
417	if (RT_SUCCESS(rc))
418	rc = PGMR3PhysRegisterRam(pVM, _4G, cbRam - offRamHole, "Above 4GB Base RAM");
419	}
420	else
421	rc = PGMR3PhysRegisterRam(pVM, 0, RT_MIN(cbRam, offRamHole), "Base RAM");
422	if ( RT_SUCCESS(rc)
423	&& fPreAlloc)
424	{
425	/** @todo RamPreAlloc should be handled at the very end of the VM creation. (lazy bird) */
426	return VM_SET_ERROR(pVM, VERR_NOT_IMPLEMENTED, "TODO: RamPreAlloc");
427	}
428
429	/*
430	* Enabled mmR3UpdateReservation here since we don't want the
431	* PGMR3PhysRegisterRam calls above mess things up.
432	*/
433	pVM->mm.s.fDoneMMR3InitPaging = true;
434	AssertMsg(pVM->mm.s.cBasePages == cBasePages \|\| RT_FAILURE(rc), ("%RX64 != %RX64\n", pVM->mm.s.cBasePages, cBasePages));
435
436	LogFlow(("MMR3InitPaging: returns %Rrc\n", rc));
437	return rc;
438	}
439
440
441	/**
442	* Terminates the MM.
443	*
444	* Termination means cleaning up and freeing all resources,
445	* the VM it self is at this point powered off or suspended.
446	*
447	* @returns VBox status code.
448	* @param pVM The VM to operate on.
449	*/
450	VMMR3DECL(int) MMR3Term(PVM pVM)
451	{
452	/*
453	* Destroy the page pool. (first as it used the hyper heap)
454	*/
455	mmR3PagePoolTerm(pVM);
456
457	/*
458	* Zero stuff to detect after termination use of the MM interface
459	*/
460	pVM->mm.s.offLookupHyper = NIL_OFFSET;
461	pVM->mm.s.pHyperHeapR3 = NULL; /* freed above. */
462	pVM->mm.s.pHyperHeapR0 = NIL_RTR0PTR; /* freed above. */
463	pVM->mm.s.pHyperHeapRC = NIL_RTRCPTR; /* freed above. */
464	pVM->mm.s.offVM = 0; /* init assertion on this */
465
466	return VINF_SUCCESS;
467	}
468
469
470	/**
471	* Terminates the UVM part of MM.
472	*
473	* Termination means cleaning up and freeing all resources,
474	* the VM it self is at this point powered off or suspended.
475	*
476	* @returns VBox status code.
477	* @param pUVM Pointer to the user mode VM structure.
478	*/
479	VMMR3DECL(void) MMR3TermUVM(PUVM pUVM)
480	{
481	/*
482	* Destroy the heap.
483	*/
484	mmR3HeapDestroy(pUVM->mm.s.pHeap);
485	pUVM->mm.s.pHeap = NULL;
486	}
487
488
489	/**
490	* Reset notification.
491	*
492	* @param pVM The VM handle.
493	*/
494	VMMR3DECL(void) MMR3Reset(PVM pVM)
495	{
496	/* nothing to do anylonger. */
497	}
498
499
500	/**
501	* Execute state save operation.
502	*
503	* @returns VBox status code.
504	* @param pVM VM Handle.
505	* @param pSSM SSM operation handle.
506	*/
507	static DECLCALLBACK(int) mmR3Save(PVM pVM, PSSMHANDLE pSSM)
508	{
509	LogFlow(("mmR3Save:\n"));
510
511	/* (PGM saves the physical memory.) */
512	SSMR3PutU64(pSSM, pVM->mm.s.cBasePages);
513	return SSMR3PutU64(pSSM, pVM->mm.s.cbRamBase);
514	}
515
516
517	/**
518	* Execute state load operation.
519	*
520	* @returns VBox status code.
521	* @param pVM VM Handle.
522	* @param pSSM SSM operation handle.
523	* @param u32Version Data layout version.
524	*/
525	static DECLCALLBACK(int) mmR3Load(PVM pVM, PSSMHANDLE pSSM, uint32_t u32Version)
526	{
527	LogFlow(("mmR3Load:\n"));
528
529	/*
530	* Validate version.
531	*/
532	if ( SSM_VERSION_MAJOR_CHANGED(u32Version, MM_SAVED_STATE_VERSION)
533	\|\| !u32Version)
534	{
535	AssertMsgFailed(("mmR3Load: Invalid version u32Version=%d!\n", u32Version));
536	return VERR_SSM_UNSUPPORTED_DATA_UNIT_VERSION;
537	}
538
539	/*
540	* Check the cBasePages and cbRamBase values.
541	*/
542	int rc;
543	RTUINT cb1;
544
545	/* cBasePages (ignored) */
546	uint64_t cPages;
547	if (u32Version >= 2)
548	rc = SSMR3GetU64(pSSM, &cPages);
549	else
550	{
551	rc = SSMR3GetUInt(pSSM, &cb1);
552	cPages = cb1 >> PAGE_SHIFT;
553	}
554	if (RT_FAILURE(rc))
555	return rc;
556
557	/* cbRamBase */
558	uint64_t cb;
559	if (u32Version != 1)
560	rc = SSMR3GetU64(pSSM, &cb);
561	else
562	{
563	rc = SSMR3GetUInt(pSSM, &cb1);
564	cb = cb1;
565	}
566	if (RT_FAILURE(rc))
567	return rc;
568	AssertLogRelMsgReturn(cb == pVM->mm.s.cbRamBase,
569	("Memory configuration has changed. cbRamBase=%#RX64 save=%#RX64\n", pVM->mm.s.cbRamBase, cb),
570	VERR_SSM_LOAD_MEMORY_SIZE_MISMATCH);
571
572	/* (PGM restores the physical memory.) */
573	return rc;
574	}
575
576
577	/**
578	* Updates GMM with memory reservation changes.
579	*
580	* Called when MM::cbRamRegistered, MM::cShadowPages or MM::cFixedPages changes.
581	*
582	* @returns VBox status code - see GMMR0UpdateReservation.
583	* @param pVM The shared VM structure.
584	*/
585	int mmR3UpdateReservation(PVM pVM)
586	{
587	VM_ASSERT_EMT(pVM);
588	if (pVM->mm.s.fDoneMMR3InitPaging)
589	return GMMR3UpdateReservation(pVM,
590	RT_MAX(pVM->mm.s.cBasePages + pVM->mm.s.cHandyPages, 1),
591	RT_MAX(pVM->mm.s.cShadowPages, 1),
592	RT_MAX(pVM->mm.s.cFixedPages, 1));
593	return VINF_SUCCESS;
594	}
595
596
597	/**
598	* Interface for PGM to increase the reservation of RAM and ROM pages.
599	*
600	* This can be called before MMR3InitPaging.
601	*
602	* @returns VBox status code. Will set VM error on failure.
603	* @param pVM The shared VM structure.
604	* @param cAddBasePages The number of pages to add.
605	*/
606	VMMR3DECL(int) MMR3IncreaseBaseReservation(PVM pVM, uint64_t cAddBasePages)
607	{
608	uint64_t cOld = pVM->mm.s.cBasePages;
609	pVM->mm.s.cBasePages += cAddBasePages;
610	LogFlow(("MMR3IncreaseBaseReservation: +%RU64 (%RU64 -> %RU64\n", cAddBasePages, cOld, pVM->mm.s.cBasePages));
611	int rc = mmR3UpdateReservation(pVM);
612	if (RT_FAILURE(rc))
613	{
614	VMSetError(pVM, rc, RT_SRC_POS, N_("Failed to reserved physical memory for the RAM (%#RX64 -> %#RX64 + %#RX32)"),
615	cOld, pVM->mm.s.cBasePages, pVM->mm.s.cHandyPages);
616	pVM->mm.s.cBasePages = cOld;
617	}
618	return rc;
619	}
620
621
622	/**
623	* Interface for PGM to make reservations for handy pages in addition to the
624	* base memory.
625	*
626	* This can be called before MMR3InitPaging.
627	*
628	* @returns VBox status code. Will set VM error on failure.
629	* @param pVM The shared VM structure.
630	* @param cHandyPages The number of handy pages.
631	*/
632	VMMR3DECL(int) MMR3ReserveHandyPages(PVM pVM, uint32_t cHandyPages)
633	{
634	AssertReturn(!pVM->mm.s.cHandyPages, VERR_WRONG_ORDER);
635
636	pVM->mm.s.cHandyPages = cHandyPages;
637	LogFlow(("MMR3ReserveHandyPages: %RU32 (base %RU64)\n", pVM->mm.s.cHandyPages, pVM->mm.s.cBasePages));
638	int rc = mmR3UpdateReservation(pVM);
639	if (RT_FAILURE(rc))
640	{
641	VMSetError(pVM, rc, RT_SRC_POS, N_("Failed to reserved physical memory for the RAM (%#RX64 + %#RX32)"),
642	pVM->mm.s.cBasePages, pVM->mm.s.cHandyPages);
643	pVM->mm.s.cHandyPages = 0;
644	}
645	return rc;
646	}
647
648
649	/**
650	* Interface for PGM to adjust the reservation of fixed pages.
651	*
652	* This can be called before MMR3InitPaging.
653	*
654	* @returns VBox status code. Will set VM error on failure.
655	* @param pVM The shared VM structure.
656	* @param cDeltaFixedPages The number of pages to add (positive) or subtract (negative).
657	* @param pszDesc Some description associated with the reservation.
658	*/
659	VMMR3DECL(int) MMR3AdjustFixedReservation(PVM pVM, int32_t cDeltaFixedPages, const char *pszDesc)
660	{
661	const uint32_t cOld = pVM->mm.s.cFixedPages;
662	pVM->mm.s.cFixedPages += cDeltaFixedPages;
663	LogFlow(("MMR3AdjustFixedReservation: %d (%u -> %u)\n", cDeltaFixedPages, cOld, pVM->mm.s.cFixedPages));
664	int rc = mmR3UpdateReservation(pVM);
665	if (RT_FAILURE(rc))
666	{
667	VMSetError(pVM, rc, RT_SRC_POS, N_("Failed to reserve physical memory (%#x -> %#x; %s)"),
668	cOld, pVM->mm.s.cFixedPages, pszDesc);
669	pVM->mm.s.cFixedPages = cOld;
670	}
671	return rc;
672	}
673
674
675	/**
676	* Interface for PGM to update the reservation of shadow pages.
677	*
678	* This can be called before MMR3InitPaging.
679	*
680	* @returns VBox status code. Will set VM error on failure.
681	* @param pVM The shared VM structure.
682	* @param cShadowPages The new page count.
683	*/
684	VMMR3DECL(int) MMR3UpdateShadowReservation(PVM pVM, uint32_t cShadowPages)
685	{
686	const uint32_t cOld = pVM->mm.s.cShadowPages;
687	pVM->mm.s.cShadowPages = cShadowPages;
688	LogFlow(("MMR3UpdateShadowReservation: %u -> %u\n", cOld, pVM->mm.s.cShadowPages));
689	int rc = mmR3UpdateReservation(pVM);
690	if (RT_FAILURE(rc))
691	{
692	VMSetError(pVM, rc, RT_SRC_POS, N_("Failed to reserve physical memory for shadow page tables (%#x -> %#x)"), cOld, pVM->mm.s.cShadowPages);
693	pVM->mm.s.cShadowPages = cOld;
694	}
695	return rc;
696	}
697
698
699	/**
700	* Convert HC Physical address to HC Virtual address.
701	*
702	* @returns VBox status.
703	* @param pVM VM handle.
704	* @param HCPhys The host context virtual address.
705	* @param ppv Where to store the resulting address.
706	* @thread The Emulation Thread.
707	*
708	* @remarks Avoid whenever possible.
709	* Intended for the debugger facility only.
710	* @todo Rename to indicate the special usage.
711	*/
712	VMMR3DECL(int) MMR3HCPhys2HCVirt(PVM pVM, RTHCPHYS HCPhys, void **ppv)
713	{
714	/*
715	* Try page tables.
716	*/
717	int rc = MMPagePhys2PageTry(pVM, HCPhys, ppv);
718	if (RT_SUCCESS(rc))
719	return rc;
720
721	/*
722	* Iterate thru the lookup records for HMA.
723	*/
724	uint32_t off = HCPhys & PAGE_OFFSET_MASK;
725	HCPhys &= X86_PTE_PAE_PG_MASK;
726	PMMLOOKUPHYPER pCur = (PMMLOOKUPHYPER)((uint8_t *)pVM->mm.s.CTX_SUFF(pHyperHeap) + pVM->mm.s.offLookupHyper);
727	for (;;)
728	{
729	switch (pCur->enmType)
730	{
731	case MMLOOKUPHYPERTYPE_LOCKED:
732	{
733	PCRTHCPHYS paHCPhysPages = pCur->u.Locked.paHCPhysPages;
734	size_t iPage = pCur->cb >> PAGE_SHIFT;
735	while (iPage-- > 0)
736	if (paHCPhysPages[iPage] == HCPhys)
737	{
738	ppv = (char )pCur->u.Locked.pvR3 + (iPage << PAGE_SHIFT) + off;
739	return VINF_SUCCESS;
740	}
741	break;
742	}
743
744	case MMLOOKUPHYPERTYPE_HCPHYS:
745	if (pCur->u.HCPhys.HCPhys - HCPhys < pCur->cb)
746	{
747	ppv = (uint8_t )pCur->u.HCPhys.pvR3 + pCur->u.HCPhys.HCPhys - HCPhys + off;
748	return VINF_SUCCESS;
749	}
750	break;
751
752	case MMLOOKUPHYPERTYPE_GCPHYS: /* (for now we'll not allow these kind of conversions) */
753	case MMLOOKUPHYPERTYPE_MMIO2:
754	case MMLOOKUPHYPERTYPE_DYNAMIC:
755	break;
756
757	default:
758	AssertMsgFailed(("enmType=%d\n", pCur->enmType));
759	break;
760	}
761
762	/* next */
763	if (pCur->offNext == (int32_t)NIL_OFFSET)
764	break;
765	pCur = (PMMLOOKUPHYPER)((uint8_t *)pCur + pCur->offNext);
766	}
767	/* give up */
768	return VERR_INVALID_POINTER;
769	}
770
771
772	/**
773	* Read memory from GC virtual address using the current guest CR3.
774	*
775	* @returns VBox status.
776	* @param pVM VM handle.
777	* @param pvDst Destination address (HC of course).
778	* @param GCPtr GC virtual address.
779	* @param cb Number of bytes to read.
780	*
781	* @remarks Intended for the debugger facility only.
782	* @todo Move to DBGF, it's only selecting which functions to use!
783	*/
784	VMMR3DECL(int) MMR3ReadGCVirt(PVM pVM, void *pvDst, RTGCPTR GCPtr, size_t cb)
785	{
786	if (GCPtr - pVM->mm.s.pvHyperAreaGC < pVM->mm.s.cbHyperArea)
787	return MMR3HyperReadGCVirt(pVM, pvDst, GCPtr, cb);
788	return PGMPhysSimpleReadGCPtr(pVM, pvDst, GCPtr, cb);
789	}
790
791
792	/**
793	* Write to memory at GC virtual address translated using the current guest CR3.
794	*
795	* @returns VBox status.
796	* @param pVM VM handle.
797	* @param GCPtrDst GC virtual address.
798	* @param pvSrc The source address (HC of course).
799	* @param cb Number of bytes to read.
800	*
801	* @remarks Intended for the debugger facility only.
802	* @todo Move to DBGF, it's only selecting which functions to use!
803	*/
804	VMMR3DECL(int) MMR3WriteGCVirt(PVM pVM, RTGCPTR GCPtrDst, const void *pvSrc, size_t cb)
805	{
806	if (GCPtrDst - pVM->mm.s.pvHyperAreaGC < pVM->mm.s.cbHyperArea)
807	return VERR_ACCESS_DENIED;
808	return PGMPhysSimpleWriteGCPtr(pVM, GCPtrDst, pvSrc, cb);
809	}
810
811
812	/**
813	* Get the size of the base RAM.
814	* This usually means the size of the first contigous block of physical memory.
815	*
816	* @returns The guest base RAM size.
817	* @param pVM The VM handle.
818	* @thread Any.
819	*
820	* @deprecated
821	*/
822	VMMR3DECL(uint64_t) MMR3PhysGetRamSize(PVM pVM)
823	{
824	return pVM->mm.s.cbRamBase;
825	}
826

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source: vbox/trunk/src/VBox/VMM/MM.cpp@ 18746

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