MM.cpp@ 93444

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1	/* $Id: MM.cpp 93115 2022-01-01 11:31:46Z vboxsync $ */
2	/** @file
3	* MM - Memory Manager.
4	*/
5
6	/*
7	* Copyright (C) 2006-2022 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	return VINF_SUCCESS;
204	return rc;
205	}
206
207
208	/**
209	* Initializes the MM.
210	*
211	* MM is managing the virtual address space (among other things) and
212	* setup the hypervisor memory area mapping in the VM structure and
213	* the hypervisor alloc-only-heap. Assuming the current init order
214	* and components the hypervisor memory area looks like this:
215	* -# VM Structure.
216	* -# Hypervisor alloc only heap (also call Hypervisor memory region).
217	* -# Core code.
218	*
219	* MM determines the virtual address of the hypervisor 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 cross context VM structure.
225	*/
226	VMMR3DECL(int) MMR3Init(PVM pVM)
227	{
228	LogFlow(("MMR3Init\n"));
229
230	/*
231	* Assert alignment, sizes and order.
232	*/
233	AssertRelease(!(RT_UOFFSETOF(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_UOFFSETOF(VM, mm);
241	pVM->mm.s.offLookupHyper = NIL_OFFSET;
242
243	/*
244	* Init the hypervisor related stuff.
245	*/
246	int rc = mmR3HyperInit(pVM);
247	if (RT_SUCCESS(rc))
248	{
249	/*
250	* Register the saved state data unit.
251	*/
252	rc = SSMR3RegisterInternal(pVM, "mm", 1, MM_SAVED_STATE_VERSION, sizeof(uint32_t) * 2,
253	NULL, NULL, NULL,
254	NULL, mmR3Save, NULL,
255	NULL, mmR3Load, NULL);
256	if (RT_SUCCESS(rc))
257	{
258	/*
259	* Statistics.
260	*/
261	STAM_REG(pVM, &pVM->mm.s.cBasePages, STAMTYPE_U64, "/MM/Reserved/cBasePages", STAMUNIT_PAGES, "Reserved number of base pages, ROM and Shadow ROM included.");
262	STAM_REG(pVM, &pVM->mm.s.cHandyPages, STAMTYPE_U32, "/MM/Reserved/cHandyPages", STAMUNIT_PAGES, "Reserved number of handy pages.");
263	STAM_REG(pVM, &pVM->mm.s.cShadowPages, STAMTYPE_U32, "/MM/Reserved/cShadowPages", STAMUNIT_PAGES, "Reserved number of shadow paging pages.");
264	STAM_REG(pVM, &pVM->mm.s.cFixedPages, STAMTYPE_U32, "/MM/Reserved/cFixedPages", STAMUNIT_PAGES, "Reserved number of fixed pages (MMIO2).");
265	STAM_REG(pVM, &pVM->mm.s.cbRamBase, STAMTYPE_U64, "/MM/cbRamBase", STAMUNIT_BYTES, "Size of the base RAM.");
266
267	return rc;
268	}
269
270	/* .... failure .... */
271	}
272	MMR3Term(pVM);
273	return rc;
274	}
275
276
277	/**
278	* Initializes the MM parts which depends on PGM being initialized.
279	*
280	* @returns VBox status code.
281	* @param pVM The cross context VM structure.
282	* @remark No cleanup necessary since MMR3Term() will be called on failure.
283	*/
284	VMMR3DECL(int) MMR3InitPaging(PVM pVM)
285	{
286	LogFlow(("MMR3InitPaging:\n"));
287
288	/*
289	* Query the CFGM values.
290	*/
291	int rc;
292	PCFGMNODE pMMCfg = CFGMR3GetChild(CFGMR3GetRoot(pVM), "MM");
293	if (!pMMCfg)
294	{
295	rc = CFGMR3InsertNode(CFGMR3GetRoot(pVM), "MM", &pMMCfg);
296	AssertRCReturn(rc, rc);
297	}
298
299	/** @cfgm{/RamSize, uint64_t, 0, 16TB, 0}
300	* Specifies the size of the base RAM that is to be set up during
301	* VM initialization.
302	*/
303	uint64_t cbRam;
304	rc = CFGMR3QueryU64(CFGMR3GetRoot(pVM), "RamSize", &cbRam);
305	if (rc == VERR_CFGM_VALUE_NOT_FOUND)
306	cbRam = 0;
307	else
308	AssertMsgRCReturn(rc, ("Configuration error: Failed to query integer \"RamSize\", rc=%Rrc.\n", rc), rc);
309	AssertLogRelMsg(!(cbRam & ~X86_PTE_PAE_PG_MASK), ("%RGp X86_PTE_PAE_PG_MASK=%RX64\n", cbRam, X86_PTE_PAE_PG_MASK));
310	AssertLogRelMsgReturn(cbRam <= GMM_GCPHYS_LAST, ("cbRam=%RGp GMM_GCPHYS_LAST=%RX64\n", cbRam, GMM_GCPHYS_LAST), VERR_OUT_OF_RANGE);
311	cbRam &= X86_PTE_PAE_PG_MASK;
312	pVM->mm.s.cbRamBase = cbRam;
313
314	/** @cfgm{/RamHoleSize, uint32_t, 0, 4032MB, 512MB}
315	* Specifies the size of the memory hole. The memory hole is used
316	* to avoid mapping RAM to the range normally used for PCI memory regions.
317	* Must be aligned on a 4MB boundary. */
318	uint32_t cbRamHole;
319	rc = CFGMR3QueryU32Def(CFGMR3GetRoot(pVM), "RamHoleSize", &cbRamHole, MM_RAM_HOLE_SIZE_DEFAULT);
320	AssertLogRelMsgRCReturn(rc, ("Configuration error: Failed to query integer \"RamHoleSize\", rc=%Rrc.\n", rc), rc);
321	AssertLogRelMsgReturn(cbRamHole <= 4032U * _1M,
322	("Configuration error: \"RamHoleSize\"=%#RX32 is too large.\n", cbRamHole), VERR_OUT_OF_RANGE);
323	AssertLogRelMsgReturn(cbRamHole > 16 * _1M,
324	("Configuration error: \"RamHoleSize\"=%#RX32 is too large.\n", cbRamHole), VERR_OUT_OF_RANGE);
325	AssertLogRelMsgReturn(!(cbRamHole & (_4M - 1)),
326	("Configuration error: \"RamHoleSize\"=%#RX32 is misaligned.\n", cbRamHole), VERR_OUT_OF_RANGE);
327	uint64_t const offRamHole = _4G - cbRamHole;
328	if (cbRam < offRamHole)
329	Log(("MM: %RU64 bytes of RAM\n", cbRam));
330	else
331	Log(("MM: %RU64 bytes of RAM with a hole at %RU64 up to 4GB.\n", cbRam, offRamHole));
332
333	/** @cfgm{/MM/Policy, string, no overcommitment}
334	* Specifies the policy to use when reserving memory for this VM. The recognized
335	* value is 'no overcommitment' (default). See GMMPOLICY.
336	*/
337	GMMOCPOLICY enmOcPolicy;
338	char sz[64];
339	rc = CFGMR3QueryString(CFGMR3GetRoot(pVM), "Policy", sz, sizeof(sz));
340	if (RT_SUCCESS(rc))
341	{
342	if ( !RTStrICmp(sz, "no_oc")
343	\|\| !RTStrICmp(sz, "no overcommitment"))
344	enmOcPolicy = GMMOCPOLICY_NO_OC;
345	else
346	return VMSetError(pVM, VERR_INVALID_PARAMETER, RT_SRC_POS, "Unknown \"MM/Policy\" value \"%s\"", sz);
347	}
348	else if (rc == VERR_CFGM_VALUE_NOT_FOUND)
349	enmOcPolicy = GMMOCPOLICY_NO_OC;
350	else
351	AssertMsgFailedReturn(("Configuration error: Failed to query string \"MM/Policy\", rc=%Rrc.\n", rc), rc);
352
353	/** @cfgm{/MM/Priority, string, normal}
354	* Specifies the memory priority of this VM. The priority comes into play when the
355	* system is overcommitted and the VMs needs to be milked for memory. The recognized
356	* values are 'low', 'normal' (default) and 'high'. See GMMPRIORITY.
357	*/
358	GMMPRIORITY enmPriority;
359	rc = CFGMR3QueryString(CFGMR3GetRoot(pVM), "Priority", sz, sizeof(sz));
360	if (RT_SUCCESS(rc))
361	{
362	if (!RTStrICmp(sz, "low"))
363	enmPriority = GMMPRIORITY_LOW;
364	else if (!RTStrICmp(sz, "normal"))
365	enmPriority = GMMPRIORITY_NORMAL;
366	else if (!RTStrICmp(sz, "high"))
367	enmPriority = GMMPRIORITY_HIGH;
368	else
369	return VMSetError(pVM, VERR_INVALID_PARAMETER, RT_SRC_POS, "Unknown \"MM/Priority\" value \"%s\"", sz);
370	}
371	else if (rc == VERR_CFGM_VALUE_NOT_FOUND)
372	enmPriority = GMMPRIORITY_NORMAL;
373	else
374	AssertMsgFailedReturn(("Configuration error: Failed to query string \"MM/Priority\", rc=%Rrc.\n", rc), rc);
375
376	/*
377	* Make the initial memory reservation with GMM.
378	*/
379	uint32_t const cbUma = _1M - 640*_1K;
380	uint64_t cBasePages = ((cbRam - cbUma) >> PAGE_SHIFT) + pVM->mm.s.cBasePages;
381	rc = GMMR3InitialReservation(pVM,
382	RT_MAX(cBasePages + pVM->mm.s.cHandyPages, 1),
383	RT_MAX(pVM->mm.s.cShadowPages, 1),
384	RT_MAX(pVM->mm.s.cFixedPages, 1),
385	enmOcPolicy,
386	enmPriority);
387	if (RT_FAILURE(rc))
388	{
389	if (rc == VERR_GMM_MEMORY_RESERVATION_DECLINED)
390	return VMSetError(pVM, rc, RT_SRC_POS,
391	N_("Insufficient free memory to start the VM (cbRam=%#RX64 enmOcPolicy=%d enmPriority=%d)"),
392	cbRam, enmOcPolicy, enmPriority);
393	return VMSetError(pVM, rc, RT_SRC_POS, "GMMR3InitialReservation(,%#RX64,0,0,%d,%d)",
394	cbRam >> PAGE_SHIFT, enmOcPolicy, enmPriority);
395	}
396
397	/*
398	* If RamSize is 0 we're done now.
399	*/
400	if (cbRam < PAGE_SIZE)
401	{
402	Log(("MM: No RAM configured\n"));
403	return VINF_SUCCESS;
404	}
405
406	/*
407	* Setup the base ram (PGM).
408	*/
409	pVM->mm.s.cbRamHole = cbRamHole;
410	pVM->mm.s.cbRamBelow4GB = cbRam > offRamHole ? offRamHole : cbRam;
411	pVM->mm.s.cbRamAbove4GB = cbRam > offRamHole ? cbRam - offRamHole : 0;
412
413	/* First the conventional memory: */
414	rc = PGMR3PhysRegisterRam(pVM, 0, RT_MIN(cbRam, 640*_1K), "Conventional RAM");
415	if (RT_SUCCESS(rc) && cbRam >= _1M)
416	{
417	/* The extended memory from 1MiB to 2MiB to align better with large pages in NEM mode: */
418	rc = PGMR3PhysRegisterRam(pVM, _1M, RT_MIN(_1M, cbRam - _1M), "Extended RAM, 1-2MB");
419	if (cbRam > _2M)
420	{
421	/* The extended memory from 2MiB up to 4GiB: */
422	rc = PGMR3PhysRegisterRam(pVM, _2M, pVM->mm.s.cbRamBelow4GB - _2M, "Extended RAM, >2MB");
423
424	/* Then all the memory above 4GiB: */
425	if (RT_SUCCESS(rc) && pVM->mm.s.cbRamAbove4GB > 0)
426	rc = PGMR3PhysRegisterRam(pVM, _4G, cbRam - offRamHole, "Above 4GB Base RAM");
427	}
428	}
429
430	/*
431	* Enabled mmR3UpdateReservation here since we don't want the
432	* PGMR3PhysRegisterRam calls above mess things up.
433	*/
434	pVM->mm.s.fDoneMMR3InitPaging = true;
435	AssertMsg(pVM->mm.s.cBasePages == cBasePages \|\| RT_FAILURE(rc), ("%RX64 != %RX64\n", pVM->mm.s.cBasePages, cBasePages));
436
437	LogFlow(("MMR3InitPaging: returns %Rrc\n", rc));
438	return rc;
439	}
440
441
442	/**
443	* Terminates the MM.
444	*
445	* Termination means cleaning up and freeing all resources,
446	* the VM it self is at this point powered off or suspended.
447	*
448	* @returns VBox status code.
449	* @param pVM The cross context VM structure.
450	*/
451	VMMR3DECL(int) MMR3Term(PVM pVM)
452	{
453	/*
454	* Clean up the hypervisor heap.
455	*/
456	mmR3HyperTerm(pVM);
457
458	/*
459	* Zero stuff to detect after termination use of the MM interface
460	*/
461	pVM->mm.s.offLookupHyper = NIL_OFFSET;
462	pVM->mm.s.pHyperHeapR3 = NULL; /* freed above. */
463	pVM->mm.s.pHyperHeapR0 = NIL_RTR0PTR; /* freed above. */
464	pVM->mm.s.pHyperHeapRC = NIL_RTRCPTR; /* freed above. */
465	pVM->mm.s.offVM = 0; /* init assertion on this */
466
467	return VINF_SUCCESS;
468	}
469
470
471	/**
472	* Terminates the UVM part of MM.
473	*
474	* Termination means cleaning up and freeing all resources,
475	* the VM it self is at this point powered off or suspended.
476	*
477	* @returns VBox status code.
478	* @param pUVM Pointer to the user mode VM structure.
479	*/
480	VMMR3DECL(void) MMR3TermUVM(PUVM pUVM)
481	{
482	/*
483	* Destroy the heap.
484	*/
485	mmR3HeapDestroy(pUVM->mm.s.pHeap);
486	pUVM->mm.s.pHeap = NULL;
487	}
488
489
490	/**
491	* Checks if the both VM and UVM parts of MM have been initialized.
492	*
493	* @returns true if initialized, false if not.
494	* @param pVM The cross context VM structure.
495	*/
496	VMMR3_INT_DECL(bool) MMR3IsInitialized(PVM pVM)
497	{
498	return pVM->mm.s.pHyperHeapR3 != NULL;
499	}
500
501
502	/**
503	* Execute state save operation.
504	*
505	* @returns VBox status code.
506	* @param pVM The cross context VM structure.
507	* @param pSSM SSM operation handle.
508	*/
509	static DECLCALLBACK(int) mmR3Save(PVM pVM, PSSMHANDLE pSSM)
510	{
511	LogFlow(("mmR3Save:\n"));
512
513	/* (PGM saves the physical memory.) */
514	SSMR3PutU64(pSSM, pVM->mm.s.cBasePages);
515	return SSMR3PutU64(pSSM, pVM->mm.s.cbRamBase);
516	}
517
518
519	/**
520	* Execute state load operation.
521	*
522	* @returns VBox status code.
523	* @param pVM The cross context VM structure.
524	* @param pSSM SSM operation handle.
525	* @param uVersion Data layout version.
526	* @param uPass The data pass.
527	*/
528	static DECLCALLBACK(int) mmR3Load(PVM pVM, PSSMHANDLE pSSM, uint32_t uVersion, uint32_t uPass)
529	{
530	LogFlow(("mmR3Load:\n"));
531	Assert(uPass == SSM_PASS_FINAL); NOREF(uPass);
532
533	/*
534	* Validate version.
535	*/
536	if ( SSM_VERSION_MAJOR_CHANGED(uVersion, MM_SAVED_STATE_VERSION)
537	\|\| !uVersion)
538	{
539	AssertMsgFailed(("mmR3Load: Invalid version uVersion=%d!\n", uVersion));
540	return VERR_SSM_UNSUPPORTED_DATA_UNIT_VERSION;
541	}
542
543	/*
544	* Check the cBasePages and cbRamBase values.
545	*/
546	int rc;
547	RTUINT cb1;
548
549	/* cBasePages (ignored) */
550	uint64_t cPages;
551	if (uVersion >= 2)
552	rc = SSMR3GetU64(pSSM, &cPages);
553	else
554	{
555	rc = SSMR3GetUInt(pSSM, &cb1);
556	cPages = cb1 >> PAGE_SHIFT;
557	}
558	if (RT_FAILURE(rc))
559	return rc;
560
561	/* cbRamBase */
562	uint64_t cb;
563	if (uVersion != 1)
564	rc = SSMR3GetU64(pSSM, &cb);
565	else
566	{
567	rc = SSMR3GetUInt(pSSM, &cb1);
568	cb = cb1;
569	}
570	if (RT_FAILURE(rc))
571	return rc;
572	AssertLogRelMsgReturn(cb == pVM->mm.s.cbRamBase,
573	("Memory configuration has changed. cbRamBase=%#RX64 save=%#RX64\n", pVM->mm.s.cbRamBase, cb),
574	VERR_SSM_LOAD_MEMORY_SIZE_MISMATCH);
575
576	/* (PGM restores the physical memory.) */
577	return rc;
578	}
579
580
581	/**
582	* Updates GMM with memory reservation changes.
583	*
584	* Called when MM::cbRamRegistered, MM::cShadowPages or MM::cFixedPages changes.
585	*
586	* @returns VBox status code - see GMMR0UpdateReservation.
587	* @param pVM The cross context VM structure.
588	*/
589	int mmR3UpdateReservation(PVM pVM)
590	{
591	VM_ASSERT_EMT(pVM);
592	if (pVM->mm.s.fDoneMMR3InitPaging)
593	return GMMR3UpdateReservation(pVM,
594	RT_MAX(pVM->mm.s.cBasePages + pVM->mm.s.cHandyPages, 1),
595	RT_MAX(pVM->mm.s.cShadowPages, 1),
596	RT_MAX(pVM->mm.s.cFixedPages, 1));
597	return VINF_SUCCESS;
598	}
599
600
601	/**
602	* Interface for PGM to increase the reservation of RAM and ROM pages.
603	*
604	* This can be called before MMR3InitPaging.
605	*
606	* @returns VBox status code. Will set VM error on failure.
607	* @param pVM The cross context VM structure.
608	* @param cAddBasePages The number of pages to add.
609	*/
610	VMMR3DECL(int) MMR3IncreaseBaseReservation(PVM pVM, uint64_t cAddBasePages)
611	{
612	uint64_t cOld = pVM->mm.s.cBasePages;
613	pVM->mm.s.cBasePages += cAddBasePages;
614	LogFlow(("MMR3IncreaseBaseReservation: +%RU64 (%RU64 -> %RU64)\n", cAddBasePages, cOld, pVM->mm.s.cBasePages));
615	int rc = mmR3UpdateReservation(pVM);
616	if (RT_FAILURE(rc))
617	{
618	VMSetError(pVM, rc, RT_SRC_POS, N_("Failed to reserved physical memory for the RAM (%#RX64 -> %#RX64 + %#RX32)"),
619	cOld, pVM->mm.s.cBasePages, pVM->mm.s.cHandyPages);
620	pVM->mm.s.cBasePages = cOld;
621	}
622	return rc;
623	}
624
625
626	/**
627	* Interface for PGM to make reservations for handy pages in addition to the
628	* base memory.
629	*
630	* This can be called before MMR3InitPaging.
631	*
632	* @returns VBox status code. Will set VM error on failure.
633	* @param pVM The cross context VM structure.
634	* @param cHandyPages The number of handy pages.
635	*/
636	VMMR3DECL(int) MMR3ReserveHandyPages(PVM pVM, uint32_t cHandyPages)
637	{
638	AssertReturn(!pVM->mm.s.cHandyPages, VERR_WRONG_ORDER);
639
640	pVM->mm.s.cHandyPages = cHandyPages;
641	LogFlow(("MMR3ReserveHandyPages: %RU32 (base %RU64)\n", pVM->mm.s.cHandyPages, pVM->mm.s.cBasePages));
642	int rc = mmR3UpdateReservation(pVM);
643	if (RT_FAILURE(rc))
644	{
645	VMSetError(pVM, rc, RT_SRC_POS, N_("Failed to reserved physical memory for the RAM (%#RX64 + %#RX32)"),
646	pVM->mm.s.cBasePages, pVM->mm.s.cHandyPages);
647	pVM->mm.s.cHandyPages = 0;
648	}
649	return rc;
650	}
651
652
653	/**
654	* Interface for PGM to adjust the reservation of fixed pages.
655	*
656	* This can be called before MMR3InitPaging.
657	*
658	* @returns VBox status code. Will set VM error on failure.
659	* @param pVM The cross context VM structure.
660	* @param cDeltaFixedPages The number of pages to add (positive) or subtract (negative).
661	* @param pszDesc Some description associated with the reservation.
662	*/
663	VMMR3DECL(int) MMR3AdjustFixedReservation(PVM pVM, int32_t cDeltaFixedPages, const char *pszDesc)
664	{
665	const uint32_t cOld = pVM->mm.s.cFixedPages;
666	pVM->mm.s.cFixedPages += cDeltaFixedPages;
667	LogFlow(("MMR3AdjustFixedReservation: %d (%u -> %u)\n", cDeltaFixedPages, cOld, pVM->mm.s.cFixedPages));
668	int rc = mmR3UpdateReservation(pVM);
669	if (RT_FAILURE(rc))
670	{
671	VMSetError(pVM, rc, RT_SRC_POS, N_("Failed to reserve physical memory (%#x -> %#x; %s)"),
672	cOld, pVM->mm.s.cFixedPages, pszDesc);
673	pVM->mm.s.cFixedPages = cOld;
674	}
675	return rc;
676	}
677
678
679	/**
680	* Interface for PGM to update the reservation of shadow pages.
681	*
682	* This can be called before MMR3InitPaging.
683	*
684	* @returns VBox status code. Will set VM error on failure.
685	* @param pVM The cross context VM structure.
686	* @param cShadowPages The new page count.
687	*/
688	VMMR3DECL(int) MMR3UpdateShadowReservation(PVM pVM, uint32_t cShadowPages)
689	{
690	const uint32_t cOld = pVM->mm.s.cShadowPages;
691	pVM->mm.s.cShadowPages = cShadowPages;
692	LogFlow(("MMR3UpdateShadowReservation: %u -> %u\n", cOld, pVM->mm.s.cShadowPages));
693	int rc = mmR3UpdateReservation(pVM);
694	if (RT_FAILURE(rc))
695	{
696	VMSetError(pVM, rc, RT_SRC_POS, N_("Failed to reserve physical memory for shadow page tables (%#x -> %#x)"), cOld, pVM->mm.s.cShadowPages);
697	pVM->mm.s.cShadowPages = cOld;
698	}
699	return rc;
700	}
701
702
703	/**
704	* Convert HC Physical address to HC Virtual address.
705	*
706	* @returns VBox status code.
707	* @param pVM The cross context VM structure.
708	* @param HCPhys The host context virtual address.
709	* @param ppv Where to store the resulting address.
710	* @thread The Emulation Thread.
711	*
712	* @remarks Avoid whenever possible.
713	* Intended for the debugger facility only.
714	* @todo Rename to indicate the special usage.
715	*/
716	VMMR3DECL(int) MMR3HCPhys2HCVirt(PVM pVM, RTHCPHYS HCPhys, void **ppv)
717	{
718	#if 0
719	/*
720	* Try page tables.
721	*/
722	int rc = MMPagePhys2PageTry(pVM, HCPhys, ppv);
723	if (RT_SUCCESS(rc))
724	return rc;
725	#endif
726
727	/*
728	* Iterate thru the lookup records for HMA.
729	*/
730	uint32_t off = HCPhys & PAGE_OFFSET_MASK;
731	HCPhys &= X86_PTE_PAE_PG_MASK;
732	PMMLOOKUPHYPER pCur = (PMMLOOKUPHYPER)((uint8_t *)pVM->mm.s.CTX_SUFF(pHyperHeap) + pVM->mm.s.offLookupHyper);
733	for (;;)
734	{
735	switch (pCur->enmType)
736	{
737	case MMLOOKUPHYPERTYPE_LOCKED:
738	{
739	PCRTHCPHYS paHCPhysPages = pCur->u.Locked.paHCPhysPages;
740	size_t iPage = pCur->cb >> PAGE_SHIFT;
741	while (iPage-- > 0)
742	if (paHCPhysPages[iPage] == HCPhys)
743	{
744	ppv = (char )pCur->u.Locked.pvR3 + (iPage << PAGE_SHIFT) + off;
745	return VINF_SUCCESS;
746	}
747	break;
748	}
749
750	case MMLOOKUPHYPERTYPE_HCPHYS:
751	if (pCur->u.HCPhys.HCPhys - HCPhys < pCur->cb)
752	{
753	ppv = (uint8_t )pCur->u.HCPhys.pvR3 + pCur->u.HCPhys.HCPhys - HCPhys + off;
754	return VINF_SUCCESS;
755	}
756	break;
757
758	case MMLOOKUPHYPERTYPE_GCPHYS: /* (for now we'll not allow these kind of conversions) */
759	case MMLOOKUPHYPERTYPE_MMIO2:
760	case MMLOOKUPHYPERTYPE_DYNAMIC:
761	break;
762
763	default:
764	AssertMsgFailed(("enmType=%d\n", pCur->enmType));
765	break;
766	}
767
768	/* next */
769	if (pCur->offNext == (int32_t)NIL_OFFSET)
770	break;
771	pCur = (PMMLOOKUPHYPER)((uint8_t *)pCur + pCur->offNext);
772	}
773	/* give up */
774	return VERR_INVALID_POINTER;
775	}
776
777
778
779	/**
780	* Get the size of the base RAM.
781	* This usually means the size of the first contiguous block of physical memory.
782	*
783	* @returns The guest base RAM size.
784	* @param pVM The cross context VM structure.
785	* @thread Any.
786	*
787	* @deprecated
788	*/
789	VMMR3DECL(uint64_t) MMR3PhysGetRamSize(PVM pVM)
790	{
791	return pVM->mm.s.cbRamBase;
792	}
793
794
795	/**
796	* Get the size of RAM below 4GB (starts at address 0x00000000).
797	*
798	* @returns The amount of RAM below 4GB in bytes.
799	* @param pVM The cross context VM structure.
800	* @thread Any.
801	*/
802	VMMR3DECL(uint32_t) MMR3PhysGetRamSizeBelow4GB(PVM pVM)
803	{
804	VM_ASSERT_VALID_EXT_RETURN(pVM, UINT32_MAX);
805	return pVM->mm.s.cbRamBelow4GB;
806	}
807
808
809	/**
810	* Get the size of RAM above 4GB (starts at address 0x000100000000).
811	*
812	* @returns The amount of RAM above 4GB in bytes.
813	* @param pVM The cross context VM structure.
814	* @thread Any.
815	*/
816	VMMR3DECL(uint64_t) MMR3PhysGetRamSizeAbove4GB(PVM pVM)
817	{
818	VM_ASSERT_VALID_EXT_RETURN(pVM, UINT64_MAX);
819	return pVM->mm.s.cbRamAbove4GB;
820	}
821
822
823	/**
824	* Get the size of the RAM hole below 4GB.
825	*
826	* @returns Size in bytes.
827	* @param pVM The cross context VM structure.
828	* @thread Any.
829	*/
830	VMMR3DECL(uint32_t) MMR3PhysGet4GBRamHoleSize(PVM pVM)
831	{
832	VM_ASSERT_VALID_EXT_RETURN(pVM, UINT32_MAX);
833	return pVM->mm.s.cbRamHole;
834	}
835

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source: vbox/trunk/src/VBox/VMM/VMMR3/MM.cpp@ 93444

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