MM.cpp@ 86146

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1	/* $Id: MM.cpp 82968 2020-02-04 10:35:17Z vboxsync $ */
2	/** @file
3	* MM - Memory Manager.
4	*/
5
6	/*
7	* Copyright (C) 2006-2020 Oracle Corporation
8	*
9	* This file is part of VirtualBox Open Source Edition (OSE), as
10	* available from http://www.virtualbox.org. This file is free software;
11	* you can redistribute it and/or modify it under the terms of the GNU
12	* General Public License (GPL) as published by the Free Software
13	* Foundation, in version 2 as it comes in the "COPYING" file of the
14	* VirtualBox OSE distribution. VirtualBox OSE is distributed in the
15	* hope that it will be useful, but WITHOUT ANY WARRANTY of any kind.
16	*/
17
18
19	/** @page pg_mm MM - The Memory Manager
20	*
21	* The memory manager is in charge of the following memory:
22	* - Hypervisor Memory Area (HMA) - Address space management (obsolete in 6.1).
23	* - Hypervisor Heap - A memory heap that lives in all contexts.
24	* - User-Kernel Heap - A memory heap lives in both host context.
25	* - Tagged ring-3 heap.
26	* - Page pools - Primarily used by PGM for shadow page tables.
27	* - Locked process memory - Guest RAM and other. (reduce/obsolete this)
28	* - Physical guest memory (RAM & ROM) - Moving to PGM. (obsolete this)
29	*
30	* The global memory manager (GMM) is the global counter part / partner of MM.
31	* MM will provide therefore ring-3 callable interfaces for some of the GMM APIs
32	* related to resource tracking (PGM is the user).
33	*
34	* @see grp_mm
35	*
36	*
37	* @section sec_mm_hma Hypervisor Memory Area - Obsolete in 6.1
38	*
39	* The HMA is used when executing in raw-mode. We borrow, with the help of
40	* PGMMap, some unused space (one or more page directory entries to be precise)
41	* in the guest's virtual memory context. PGM will monitor the guest's virtual
42	* address space for changes and relocate the HMA when required.
43	*
44	* To give some idea what's in the HMA, study the 'info hma' output:
45	* @verbatim
46	VBoxDbg> info hma
47	Hypervisor Memory Area (HMA) Layout: Base 00000000a0000000, 0x00800000 bytes
48	00000000a05cc000-00000000a05cd000 DYNAMIC fence
49	00000000a05c4000-00000000a05cc000 DYNAMIC Dynamic mapping
50	00000000a05c3000-00000000a05c4000 DYNAMIC fence
51	00000000a05b8000-00000000a05c3000 DYNAMIC Paging
52	00000000a05b6000-00000000a05b8000 MMIO2 0000000000000000 PCNetShMem
53	00000000a0536000-00000000a05b6000 MMIO2 0000000000000000 VGA VRam
54	00000000a0523000-00000000a0536000 00002aaab3d0c000 LOCKED autofree alloc once (PDM_DEVICE)
55	00000000a0522000-00000000a0523000 DYNAMIC fence
56	00000000a051e000-00000000a0522000 00002aaab36f5000 LOCKED autofree VBoxDD2RC.rc
57	00000000a051d000-00000000a051e000 DYNAMIC fence
58	00000000a04eb000-00000000a051d000 00002aaab36c3000 LOCKED autofree VBoxDDRC.rc
59	00000000a04ea000-00000000a04eb000 DYNAMIC fence
60	00000000a04e9000-00000000a04ea000 00002aaab36c2000 LOCKED autofree ram range (High ROM Region)
61	00000000a04e8000-00000000a04e9000 DYNAMIC fence
62	00000000a040e000-00000000a04e8000 00002aaab2e6d000 LOCKED autofree VMMRC.rc
63	00000000a0208000-00000000a040e000 00002aaab2c67000 LOCKED autofree alloc once (PATM)
64	00000000a01f7000-00000000a0208000 00002aaaab92d000 LOCKED autofree alloc once (SELM)
65	00000000a01e7000-00000000a01f7000 00002aaaab5e8000 LOCKED autofree alloc once (SELM)
66	00000000a01e6000-00000000a01e7000 DYNAMIC fence
67	00000000a01e5000-00000000a01e6000 00002aaaab5e7000 HCPHYS 00000000c363c000 Core Code
68	00000000a01e4000-00000000a01e5000 DYNAMIC fence
69	00000000a01e3000-00000000a01e4000 00002aaaaab26000 HCPHYS 00000000619cf000 GIP
70	00000000a01a2000-00000000a01e3000 00002aaaabf32000 LOCKED autofree alloc once (PGM_PHYS)
71	00000000a016b000-00000000a01a2000 00002aaab233f000 LOCKED autofree alloc once (PGM_POOL)
72	00000000a016a000-00000000a016b000 DYNAMIC fence
73	00000000a0165000-00000000a016a000 DYNAMIC CR3 mapping
74	00000000a0164000-00000000a0165000 DYNAMIC fence
75	00000000a0024000-00000000a0164000 00002aaab215f000 LOCKED autofree Heap
76	00000000a0023000-00000000a0024000 DYNAMIC fence
77	00000000a0001000-00000000a0023000 00002aaab1d24000 LOCKED pages VM
78	00000000a0000000-00000000a0001000 DYNAMIC fence
79	@endverbatim
80	*
81	*
82	* @section sec_mm_hyperheap Hypervisor Heap
83	*
84	* The heap is accessible from ring-3, ring-0 and the raw-mode context. That
85	* said, it's not necessarily mapped into ring-0 on if that's possible since we
86	* don't wish to waste kernel address space without a good reason.
87	*
88	* Allocations within the heap are always in the same relative position in all
89	* contexts, so, it's possible to use offset based linking. In fact, the heap is
90	* internally using offset based linked lists tracking heap blocks. We use
91	* offset linked AVL trees and lists in a lot of places where share structures
92	* between RC, R3 and R0, so this is a strict requirement of the heap. However
93	* this means that we cannot easily extend the heap since the extension won't
94	* necessarily be in the continuation of the current heap memory in all (or any)
95	* context.
96	*
97	* All allocations are tagged. Per tag allocation statistics will be maintaining
98	* and exposed thru STAM when VBOX_WITH_STATISTICS is defined.
99	*
100	*
101	* @section sec_mm_r3heap Tagged Ring-3 Heap
102	*
103	* The ring-3 heap is a wrapper around the RTMem API adding allocation
104	* statistics and automatic cleanup on VM destruction.
105	*
106	* Per tag allocation statistics will be maintaining and exposed thru STAM when
107	* VBOX_WITH_STATISTICS is defined.
108	*
109	*
110	* @section sec_mm_page Page Pool
111	*
112	* The MM manages a page pool from which other components can allocate locked,
113	* page aligned and page sized memory objects. The pool provides facilities to
114	* convert back and forth between (host) physical and virtual addresses (within
115	* the pool of course). Several specialized interfaces are provided for the most
116	* common allocations and conversions to save the caller from bothersome casting
117	* and extra parameter passing.
118	*
119	*
120	* @section sec_mm_locked Locked Process Memory
121	*
122	* MM manages the locked process memory. This is used for a bunch of things
123	* (count the LOCKED entries in the 'info hma' output found in @ref sec_mm_hma),
124	* but the main consumer of memory is currently for guest RAM. There is an
125	* ongoing rewrite that will move all the guest RAM allocation to PGM and
126	* GMM.
127	*
128	* The locking of memory is something doing in cooperation with the VirtualBox
129	* support driver, SUPDrv (aka. VBoxDrv), thru the support library API,
130	* SUPR3 (aka. SUPLib).
131	*
132	*
133	* @section sec_mm_phys Physical Guest Memory
134	*
135	* MM is currently managing the physical memory for the guest. It relies heavily
136	* on PGM for this. There is an ongoing rewrite that will move this to PGM. (The
137	* rewrite is driven by the need for more flexible guest ram allocation, but
138	* also motivated by the fact that MMPhys is just adding stupid bureaucracy and
139	* that MMR3PhysReserve is a totally weird artifact that must go away.)
140	*
141	*/
142
143
144	/*********************************************************************************************************************************
145	* Header Files *
146	*********************************************************************************************************************************/
147	#define LOG_GROUP LOG_GROUP_MM
148	#include <VBox/vmm/mm.h>
149	#include <VBox/vmm/pgm.h>
150	#include <VBox/vmm/cfgm.h>
151	#include <VBox/vmm/ssm.h>
152	#include <VBox/vmm/gmm.h>
153	#include "MMInternal.h"
154	#include <VBox/vmm/vm.h>
155	#include <VBox/vmm/uvm.h>
156	#include <VBox/err.h>
157	#include <VBox/param.h>
158
159	#include <VBox/log.h>
160	#include <iprt/alloc.h>
161	#include <iprt/assert.h>
162	#include <iprt/string.h>
163
164
165	/*********************************************************************************************************************************
166	* Defined Constants And Macros *
167	*********************************************************************************************************************************/
168	/** The current saved state version of MM. */
169	#define MM_SAVED_STATE_VERSION 2
170
171
172	/*********************************************************************************************************************************
173	* Internal Functions *
174	*********************************************************************************************************************************/
175	static DECLCALLBACK(int) mmR3Save(PVM pVM, PSSMHANDLE pSSM);
176	static DECLCALLBACK(int) mmR3Load(PVM pVM, PSSMHANDLE pSSM, uint32_t uVersion, uint32_t uPass);
177
178
179
180
181	/**
182	* Initializes the MM members of the UVM.
183	*
184	* This is currently only the ring-3 heap.
185	*
186	* @returns VBox status code.
187	* @param pUVM Pointer to the user mode VM structure.
188	*/
189	VMMR3DECL(int) MMR3InitUVM(PUVM pUVM)
190	{
191	/*
192	* Assert sizes and order.
193	*/
194	AssertCompile(sizeof(pUVM->mm.s) <= sizeof(pUVM->mm.padding));
195	AssertRelease(sizeof(pUVM->mm.s) <= sizeof(pUVM->mm.padding));
196	Assert(!pUVM->mm.s.pHeap);
197
198	/*
199	* Init the heap.
200	*/
201	int rc = mmR3HeapCreateU(pUVM, &pUVM->mm.s.pHeap);
202	if (RT_SUCCESS(rc))
203	{
204	rc = mmR3UkHeapCreateU(pUVM, &pUVM->mm.s.pUkHeap);
205	if (RT_SUCCESS(rc))
206	return VINF_SUCCESS;
207	mmR3HeapDestroy(pUVM->mm.s.pHeap);
208	pUVM->mm.s.pHeap = NULL;
209	}
210	return rc;
211	}
212
213
214	/**
215	* Initializes the MM.
216	*
217	* MM is managing the virtual address space (among other things) and
218	* setup the hypervisor memory area mapping in the VM structure and
219	* the hypervisor alloc-only-heap. Assuming the current init order
220	* and components the hypervisor memory area looks like this:
221	* -# VM Structure.
222	* -# Hypervisor alloc only heap (also call Hypervisor memory region).
223	* -# Core code.
224	*
225	* MM determines the virtual address of the hypervisor memory area by
226	* checking for location at previous run. If that property isn't available
227	* it will choose a default starting location, currently 0xa0000000.
228	*
229	* @returns VBox status code.
230	* @param pVM The cross context VM structure.
231	*/
232	VMMR3DECL(int) MMR3Init(PVM pVM)
233	{
234	LogFlow(("MMR3Init\n"));
235
236	/*
237	* Assert alignment, sizes and order.
238	*/
239	AssertRelease(!(RT_UOFFSETOF(VM, mm.s) & 31));
240	AssertRelease(sizeof(pVM->mm.s) <= sizeof(pVM->mm.padding));
241	AssertMsg(pVM->mm.s.offVM == 0, ("Already initialized!\n"));
242
243	/*
244	* Init the structure.
245	*/
246	pVM->mm.s.offVM = RT_UOFFSETOF(VM, mm);
247	pVM->mm.s.offLookupHyper = NIL_OFFSET;
248
249	/*
250	* Init the hypervisor related stuff.
251	*/
252	int 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, NULL, NULL,
260	NULL, mmR3Save, NULL,
261	NULL, mmR3Load, NULL);
262	if (RT_SUCCESS(rc))
263	{
264	/*
265	* Statistics.
266	*/
267	STAM_REG(pVM, &pVM->mm.s.cBasePages, STAMTYPE_U64, "/MM/Reserved/cBasePages", STAMUNIT_PAGES, "Reserved number of base pages, ROM and Shadow ROM included.");
268	STAM_REG(pVM, &pVM->mm.s.cHandyPages, STAMTYPE_U32, "/MM/Reserved/cHandyPages", STAMUNIT_PAGES, "Reserved number of handy pages.");
269	STAM_REG(pVM, &pVM->mm.s.cShadowPages, STAMTYPE_U32, "/MM/Reserved/cShadowPages", STAMUNIT_PAGES, "Reserved number of shadow paging pages.");
270	STAM_REG(pVM, &pVM->mm.s.cFixedPages, STAMTYPE_U32, "/MM/Reserved/cFixedPages", STAMUNIT_PAGES, "Reserved number of fixed pages (MMIO2).");
271	STAM_REG(pVM, &pVM->mm.s.cbRamBase, STAMTYPE_U64, "/MM/cbRamBase", STAMUNIT_BYTES, "Size of the base RAM.");
272
273	return rc;
274	}
275
276	/* .... failure .... */
277	}
278	MMR3Term(pVM);
279	return rc;
280	}
281
282
283	/**
284	* Initializes the MM parts which depends on PGM being initialized.
285	*
286	* @returns VBox status code.
287	* @param pVM The cross context VM structure.
288	* @remark No cleanup necessary since MMR3Term() will be called on failure.
289	*/
290	VMMR3DECL(int) MMR3InitPaging(PVM pVM)
291	{
292	LogFlow(("MMR3InitPaging:\n"));
293
294	/*
295	* Query the CFGM values.
296	*/
297	int rc;
298	PCFGMNODE pMMCfg = CFGMR3GetChild(CFGMR3GetRoot(pVM), "MM");
299	if (!pMMCfg)
300	{
301	rc = CFGMR3InsertNode(CFGMR3GetRoot(pVM), "MM", &pMMCfg);
302	AssertRCReturn(rc, rc);
303	}
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 boundary. */
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\n", cbRam));
336	else
337	Log(("MM: %RU64 bytes of RAM with a hole at %RU64 up to 4GB.\n", cbRam, 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	AssertMsgFailedReturn(("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	AssertMsgFailedReturn(("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	pVM->mm.s.cbRamHole = cbRamHole;
415	if (cbRam > offRamHole)
416	{
417	pVM->mm.s.cbRamBelow4GB = offRamHole;
418	rc = PGMR3PhysRegisterRam(pVM, 0, offRamHole, "Base RAM");
419	if (RT_SUCCESS(rc))
420	{
421	pVM->mm.s.cbRamAbove4GB = cbRam - offRamHole;
422	rc = PGMR3PhysRegisterRam(pVM, _4G, cbRam - offRamHole, "Above 4GB Base RAM");
423	}
424	}
425	else
426	{
427	pVM->mm.s.cbRamBelow4GB = cbRam;
428	pVM->mm.s.cbRamAbove4GB = 0;
429	rc = PGMR3PhysRegisterRam(pVM, 0, cbRam, "Base RAM");
430	}
431
432	/*
433	* Enabled mmR3UpdateReservation here since we don't want the
434	* PGMR3PhysRegisterRam calls above mess things up.
435	*/
436	pVM->mm.s.fDoneMMR3InitPaging = true;
437	AssertMsg(pVM->mm.s.cBasePages == cBasePages \|\| RT_FAILURE(rc), ("%RX64 != %RX64\n", pVM->mm.s.cBasePages, cBasePages));
438
439	LogFlow(("MMR3InitPaging: returns %Rrc\n", rc));
440	return rc;
441	}
442
443
444	/**
445	* Terminates the MM.
446	*
447	* Termination means cleaning up and freeing all resources,
448	* the VM it self is at this point powered off or suspended.
449	*
450	* @returns VBox status code.
451	* @param pVM The cross context VM structure.
452	*/
453	VMMR3DECL(int) MMR3Term(PVM pVM)
454	{
455	/*
456	* Clean up the hypervisor heap.
457	*/
458	mmR3HyperTerm(pVM);
459
460	/*
461	* Zero stuff to detect after termination use of the MM interface
462	*/
463	pVM->mm.s.offLookupHyper = NIL_OFFSET;
464	pVM->mm.s.pHyperHeapR3 = NULL; /* freed above. */
465	pVM->mm.s.pHyperHeapR0 = NIL_RTR0PTR; /* freed above. */
466	pVM->mm.s.pHyperHeapRC = NIL_RTRCPTR; /* freed above. */
467	pVM->mm.s.offVM = 0; /* init assertion on this */
468
469	/*
470	* Destroy the User-kernel heap here since the support driver session
471	* may have been terminated by the time we get to MMR3TermUVM.
472	*/
473	mmR3UkHeapDestroy(pVM->pUVM->mm.s.pUkHeap);
474	pVM->pUVM->mm.s.pUkHeap = NULL;
475
476	return VINF_SUCCESS;
477	}
478
479
480	/**
481	* Terminates the UVM part of MM.
482	*
483	* Termination means cleaning up and freeing all resources,
484	* the VM it self is at this point powered off or suspended.
485	*
486	* @returns VBox status code.
487	* @param pUVM Pointer to the user mode VM structure.
488	*/
489	VMMR3DECL(void) MMR3TermUVM(PUVM pUVM)
490	{
491	/*
492	* Destroy the heaps.
493	*/
494	if (pUVM->mm.s.pUkHeap)
495	{
496	mmR3UkHeapDestroy(pUVM->mm.s.pUkHeap);
497	pUVM->mm.s.pUkHeap = NULL;
498	}
499	mmR3HeapDestroy(pUVM->mm.s.pHeap);
500	pUVM->mm.s.pHeap = NULL;
501	}
502
503
504	/**
505	* Checks if the both VM and UVM parts of MM have been initialized.
506	*
507	* @returns true if initialized, false if not.
508	* @param pVM The cross context VM structure.
509	*/
510	VMMR3_INT_DECL(bool) MMR3IsInitialized(PVM pVM)
511	{
512	return pVM->mm.s.pHyperHeapR3 != NULL;
513	}
514
515
516	/**
517	* Execute state save operation.
518	*
519	* @returns VBox status code.
520	* @param pVM The cross context VM structure.
521	* @param pSSM SSM operation handle.
522	*/
523	static DECLCALLBACK(int) mmR3Save(PVM pVM, PSSMHANDLE pSSM)
524	{
525	LogFlow(("mmR3Save:\n"));
526
527	/* (PGM saves the physical memory.) */
528	SSMR3PutU64(pSSM, pVM->mm.s.cBasePages);
529	return SSMR3PutU64(pSSM, pVM->mm.s.cbRamBase);
530	}
531
532
533	/**
534	* Execute state load operation.
535	*
536	* @returns VBox status code.
537	* @param pVM The cross context VM structure.
538	* @param pSSM SSM operation handle.
539	* @param uVersion Data layout version.
540	* @param uPass The data pass.
541	*/
542	static DECLCALLBACK(int) mmR3Load(PVM pVM, PSSMHANDLE pSSM, uint32_t uVersion, uint32_t uPass)
543	{
544	LogFlow(("mmR3Load:\n"));
545	Assert(uPass == SSM_PASS_FINAL); NOREF(uPass);
546
547	/*
548	* Validate version.
549	*/
550	if ( SSM_VERSION_MAJOR_CHANGED(uVersion, MM_SAVED_STATE_VERSION)
551	\|\| !uVersion)
552	{
553	AssertMsgFailed(("mmR3Load: Invalid version uVersion=%d!\n", uVersion));
554	return VERR_SSM_UNSUPPORTED_DATA_UNIT_VERSION;
555	}
556
557	/*
558	* Check the cBasePages and cbRamBase values.
559	*/
560	int rc;
561	RTUINT cb1;
562
563	/* cBasePages (ignored) */
564	uint64_t cPages;
565	if (uVersion >= 2)
566	rc = SSMR3GetU64(pSSM, &cPages);
567	else
568	{
569	rc = SSMR3GetUInt(pSSM, &cb1);
570	cPages = cb1 >> PAGE_SHIFT;
571	}
572	if (RT_FAILURE(rc))
573	return rc;
574
575	/* cbRamBase */
576	uint64_t cb;
577	if (uVersion != 1)
578	rc = SSMR3GetU64(pSSM, &cb);
579	else
580	{
581	rc = SSMR3GetUInt(pSSM, &cb1);
582	cb = cb1;
583	}
584	if (RT_FAILURE(rc))
585	return rc;
586	AssertLogRelMsgReturn(cb == pVM->mm.s.cbRamBase,
587	("Memory configuration has changed. cbRamBase=%#RX64 save=%#RX64\n", pVM->mm.s.cbRamBase, cb),
588	VERR_SSM_LOAD_MEMORY_SIZE_MISMATCH);
589
590	/* (PGM restores the physical memory.) */
591	return rc;
592	}
593
594
595	/**
596	* Updates GMM with memory reservation changes.
597	*
598	* Called when MM::cbRamRegistered, MM::cShadowPages or MM::cFixedPages changes.
599	*
600	* @returns VBox status code - see GMMR0UpdateReservation.
601	* @param pVM The cross context VM structure.
602	*/
603	int mmR3UpdateReservation(PVM pVM)
604	{
605	VM_ASSERT_EMT(pVM);
606	if (pVM->mm.s.fDoneMMR3InitPaging)
607	return GMMR3UpdateReservation(pVM,
608	RT_MAX(pVM->mm.s.cBasePages + pVM->mm.s.cHandyPages, 1),
609	RT_MAX(pVM->mm.s.cShadowPages, 1),
610	RT_MAX(pVM->mm.s.cFixedPages, 1));
611	return VINF_SUCCESS;
612	}
613
614
615	/**
616	* Interface for PGM to increase the reservation of RAM and ROM pages.
617	*
618	* This can be called before MMR3InitPaging.
619	*
620	* @returns VBox status code. Will set VM error on failure.
621	* @param pVM The cross context VM structure.
622	* @param cAddBasePages The number of pages to add.
623	*/
624	VMMR3DECL(int) MMR3IncreaseBaseReservation(PVM pVM, uint64_t cAddBasePages)
625	{
626	uint64_t cOld = pVM->mm.s.cBasePages;
627	pVM->mm.s.cBasePages += cAddBasePages;
628	LogFlow(("MMR3IncreaseBaseReservation: +%RU64 (%RU64 -> %RU64\n", cAddBasePages, cOld, pVM->mm.s.cBasePages));
629	int rc = mmR3UpdateReservation(pVM);
630	if (RT_FAILURE(rc))
631	{
632	VMSetError(pVM, rc, RT_SRC_POS, N_("Failed to reserved physical memory for the RAM (%#RX64 -> %#RX64 + %#RX32)"),
633	cOld, pVM->mm.s.cBasePages, pVM->mm.s.cHandyPages);
634	pVM->mm.s.cBasePages = cOld;
635	}
636	return rc;
637	}
638
639
640	/**
641	* Interface for PGM to make reservations for handy pages in addition to the
642	* base memory.
643	*
644	* This can be called before MMR3InitPaging.
645	*
646	* @returns VBox status code. Will set VM error on failure.
647	* @param pVM The cross context VM structure.
648	* @param cHandyPages The number of handy pages.
649	*/
650	VMMR3DECL(int) MMR3ReserveHandyPages(PVM pVM, uint32_t cHandyPages)
651	{
652	AssertReturn(!pVM->mm.s.cHandyPages, VERR_WRONG_ORDER);
653
654	pVM->mm.s.cHandyPages = cHandyPages;
655	LogFlow(("MMR3ReserveHandyPages: %RU32 (base %RU64)\n", pVM->mm.s.cHandyPages, pVM->mm.s.cBasePages));
656	int rc = mmR3UpdateReservation(pVM);
657	if (RT_FAILURE(rc))
658	{
659	VMSetError(pVM, rc, RT_SRC_POS, N_("Failed to reserved physical memory for the RAM (%#RX64 + %#RX32)"),
660	pVM->mm.s.cBasePages, pVM->mm.s.cHandyPages);
661	pVM->mm.s.cHandyPages = 0;
662	}
663	return rc;
664	}
665
666
667	/**
668	* Interface for PGM to adjust the reservation of fixed pages.
669	*
670	* This can be called before MMR3InitPaging.
671	*
672	* @returns VBox status code. Will set VM error on failure.
673	* @param pVM The cross context VM structure.
674	* @param cDeltaFixedPages The number of pages to add (positive) or subtract (negative).
675	* @param pszDesc Some description associated with the reservation.
676	*/
677	VMMR3DECL(int) MMR3AdjustFixedReservation(PVM pVM, int32_t cDeltaFixedPages, const char *pszDesc)
678	{
679	const uint32_t cOld = pVM->mm.s.cFixedPages;
680	pVM->mm.s.cFixedPages += cDeltaFixedPages;
681	LogFlow(("MMR3AdjustFixedReservation: %d (%u -> %u)\n", cDeltaFixedPages, cOld, pVM->mm.s.cFixedPages));
682	int rc = mmR3UpdateReservation(pVM);
683	if (RT_FAILURE(rc))
684	{
685	VMSetError(pVM, rc, RT_SRC_POS, N_("Failed to reserve physical memory (%#x -> %#x; %s)"),
686	cOld, pVM->mm.s.cFixedPages, pszDesc);
687	pVM->mm.s.cFixedPages = cOld;
688	}
689	return rc;
690	}
691
692
693	/**
694	* Interface for PGM to update the reservation of shadow pages.
695	*
696	* This can be called before MMR3InitPaging.
697	*
698	* @returns VBox status code. Will set VM error on failure.
699	* @param pVM The cross context VM structure.
700	* @param cShadowPages The new page count.
701	*/
702	VMMR3DECL(int) MMR3UpdateShadowReservation(PVM pVM, uint32_t cShadowPages)
703	{
704	const uint32_t cOld = pVM->mm.s.cShadowPages;
705	pVM->mm.s.cShadowPages = cShadowPages;
706	LogFlow(("MMR3UpdateShadowReservation: %u -> %u\n", cOld, pVM->mm.s.cShadowPages));
707	int rc = mmR3UpdateReservation(pVM);
708	if (RT_FAILURE(rc))
709	{
710	VMSetError(pVM, rc, RT_SRC_POS, N_("Failed to reserve physical memory for shadow page tables (%#x -> %#x)"), cOld, pVM->mm.s.cShadowPages);
711	pVM->mm.s.cShadowPages = cOld;
712	}
713	return rc;
714	}
715
716
717	/**
718	* Convert HC Physical address to HC Virtual address.
719	*
720	* @returns VBox status code.
721	* @param pVM The cross context VM structure.
722	* @param HCPhys The host context virtual address.
723	* @param ppv Where to store the resulting address.
724	* @thread The Emulation Thread.
725	*
726	* @remarks Avoid whenever possible.
727	* Intended for the debugger facility only.
728	* @todo Rename to indicate the special usage.
729	*/
730	VMMR3DECL(int) MMR3HCPhys2HCVirt(PVM pVM, RTHCPHYS HCPhys, void **ppv)
731	{
732	#if 0
733	/*
734	* Try page tables.
735	*/
736	int rc = MMPagePhys2PageTry(pVM, HCPhys, ppv);
737	if (RT_SUCCESS(rc))
738	return rc;
739	#endif
740
741	/*
742	* Iterate thru the lookup records for HMA.
743	*/
744	uint32_t off = HCPhys & PAGE_OFFSET_MASK;
745	HCPhys &= X86_PTE_PAE_PG_MASK;
746	PMMLOOKUPHYPER pCur = (PMMLOOKUPHYPER)((uint8_t *)pVM->mm.s.CTX_SUFF(pHyperHeap) + pVM->mm.s.offLookupHyper);
747	for (;;)
748	{
749	switch (pCur->enmType)
750	{
751	case MMLOOKUPHYPERTYPE_LOCKED:
752	{
753	PCRTHCPHYS paHCPhysPages = pCur->u.Locked.paHCPhysPages;
754	size_t iPage = pCur->cb >> PAGE_SHIFT;
755	while (iPage-- > 0)
756	if (paHCPhysPages[iPage] == HCPhys)
757	{
758	ppv = (char )pCur->u.Locked.pvR3 + (iPage << PAGE_SHIFT) + off;
759	return VINF_SUCCESS;
760	}
761	break;
762	}
763
764	case MMLOOKUPHYPERTYPE_HCPHYS:
765	if (pCur->u.HCPhys.HCPhys - HCPhys < pCur->cb)
766	{
767	ppv = (uint8_t )pCur->u.HCPhys.pvR3 + pCur->u.HCPhys.HCPhys - HCPhys + off;
768	return VINF_SUCCESS;
769	}
770	break;
771
772	case MMLOOKUPHYPERTYPE_GCPHYS: /* (for now we'll not allow these kind of conversions) */
773	case MMLOOKUPHYPERTYPE_MMIO2:
774	case MMLOOKUPHYPERTYPE_DYNAMIC:
775	break;
776
777	default:
778	AssertMsgFailed(("enmType=%d\n", pCur->enmType));
779	break;
780	}
781
782	/* next */
783	if (pCur->offNext == (int32_t)NIL_OFFSET)
784	break;
785	pCur = (PMMLOOKUPHYPER)((uint8_t *)pCur + pCur->offNext);
786	}
787	/* give up */
788	return VERR_INVALID_POINTER;
789	}
790
791
792
793	/**
794	* Get the size of the base RAM.
795	* This usually means the size of the first contiguous block of physical memory.
796	*
797	* @returns The guest base RAM size.
798	* @param pVM The cross context VM structure.
799	* @thread Any.
800	*
801	* @deprecated
802	*/
803	VMMR3DECL(uint64_t) MMR3PhysGetRamSize(PVM pVM)
804	{
805	return pVM->mm.s.cbRamBase;
806	}
807
808
809	/**
810	* Get the size of RAM below 4GB (starts at address 0x00000000).
811	*
812	* @returns The amount of RAM below 4GB in bytes.
813	* @param pVM The cross context VM structure.
814	* @thread Any.
815	*/
816	VMMR3DECL(uint32_t) MMR3PhysGetRamSizeBelow4GB(PVM pVM)
817	{
818	VM_ASSERT_VALID_EXT_RETURN(pVM, UINT32_MAX);
819	return pVM->mm.s.cbRamBelow4GB;
820	}
821
822
823	/**
824	* Get the size of RAM above 4GB (starts at address 0x000100000000).
825	*
826	* @returns The amount of RAM above 4GB in bytes.
827	* @param pVM The cross context VM structure.
828	* @thread Any.
829	*/
830	VMMR3DECL(uint64_t) MMR3PhysGetRamSizeAbove4GB(PVM pVM)
831	{
832	VM_ASSERT_VALID_EXT_RETURN(pVM, UINT64_MAX);
833	return pVM->mm.s.cbRamAbove4GB;
834	}
835
836
837	/**
838	* Get the size of the RAM hole below 4GB.
839	*
840	* @returns Size in bytes.
841	* @param pVM The cross context VM structure.
842	* @thread Any.
843	*/
844	VMMR3DECL(uint32_t) MMR3PhysGet4GBRamHoleSize(PVM pVM)
845	{
846	VM_ASSERT_VALID_EXT_RETURN(pVM, UINT32_MAX);
847	return pVM->mm.s.cbRamHole;
848	}
849

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source: vbox/trunk/src/VBox/VMM/VMMR3/MM.cpp@ 86146

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