MM.cpp@ 92363

Last change on this file since 92363 was 92192, checked in by vboxsync, 3 years ago
VMM/MM,DevPcArch: Split the base RAM allocation into conventional (< 640KB) and extended (>= 1MB) ranges, leaving the UMA w/o RAM range backing. This will fit better with NEM, esp. on linux. bugref:10122
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1	/* $Id: MM.cpp 92192 2021-11-03 14:44:45Z 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	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
411	/* First the conventional memory: */
412	rc = PGMR3PhysRegisterRam(pVM, 0, RT_MIN(cbRam, 640*_1K), "Conventional RAM");
413	if (RT_SUCCESS(rc))
414	{
415	/* The extended memory from 1MiB up to 4GiB: */
416	if (cbRam > offRamHole)
417	{
418	pVM->mm.s.cbRamBelow4GB = offRamHole;
419	rc = PGMR3PhysRegisterRam(pVM, _1M, offRamHole - _1M, "Extended RAM");
420	if (RT_SUCCESS(rc))
421	{
422	/* Then all the memory above 4GiB: */
423	pVM->mm.s.cbRamAbove4GB = cbRam - offRamHole;
424	rc = PGMR3PhysRegisterRam(pVM, _4G, cbRam - offRamHole, "Above 4GB Base RAM");
425	}
426	}
427	else
428	{
429	pVM->mm.s.cbRamBelow4GB = cbRam;
430	pVM->mm.s.cbRamAbove4GB = 0;
431	if (cbRam > _1M)
432	rc = PGMR3PhysRegisterRam(pVM, _1M, cbRam - _1M, "Extended RAM");
433	}
434	}
435
436	/*
437	* Enabled mmR3UpdateReservation here since we don't want the
438	* PGMR3PhysRegisterRam calls above mess things up.
439	*/
440	pVM->mm.s.fDoneMMR3InitPaging = true;
441	AssertMsg(pVM->mm.s.cBasePages == cBasePages \|\| RT_FAILURE(rc), ("%RX64 != %RX64\n", pVM->mm.s.cBasePages, cBasePages));
442
443	LogFlow(("MMR3InitPaging: returns %Rrc\n", rc));
444	return rc;
445	}
446
447
448	/**
449	* Terminates the MM.
450	*
451	* Termination means cleaning up and freeing all resources,
452	* the VM it self is at this point powered off or suspended.
453	*
454	* @returns VBox status code.
455	* @param pVM The cross context VM structure.
456	*/
457	VMMR3DECL(int) MMR3Term(PVM pVM)
458	{
459	/*
460	* Clean up the hypervisor heap.
461	*/
462	mmR3HyperTerm(pVM);
463
464	/*
465	* Zero stuff to detect after termination use of the MM interface
466	*/
467	pVM->mm.s.offLookupHyper = NIL_OFFSET;
468	pVM->mm.s.pHyperHeapR3 = NULL; /* freed above. */
469	pVM->mm.s.pHyperHeapR0 = NIL_RTR0PTR; /* freed above. */
470	pVM->mm.s.pHyperHeapRC = NIL_RTRCPTR; /* freed above. */
471	pVM->mm.s.offVM = 0; /* init assertion on this */
472
473	return VINF_SUCCESS;
474	}
475
476
477	/**
478	* Terminates the UVM part of MM.
479	*
480	* Termination means cleaning up and freeing all resources,
481	* the VM it self is at this point powered off or suspended.
482	*
483	* @returns VBox status code.
484	* @param pUVM Pointer to the user mode VM structure.
485	*/
486	VMMR3DECL(void) MMR3TermUVM(PUVM pUVM)
487	{
488	/*
489	* Destroy the heap.
490	*/
491	mmR3HeapDestroy(pUVM->mm.s.pHeap);
492	pUVM->mm.s.pHeap = NULL;
493	}
494
495
496	/**
497	* Checks if the both VM and UVM parts of MM have been initialized.
498	*
499	* @returns true if initialized, false if not.
500	* @param pVM The cross context VM structure.
501	*/
502	VMMR3_INT_DECL(bool) MMR3IsInitialized(PVM pVM)
503	{
504	return pVM->mm.s.pHyperHeapR3 != NULL;
505	}
506
507
508	/**
509	* Execute state save operation.
510	*
511	* @returns VBox status code.
512	* @param pVM The cross context VM structure.
513	* @param pSSM SSM operation handle.
514	*/
515	static DECLCALLBACK(int) mmR3Save(PVM pVM, PSSMHANDLE pSSM)
516	{
517	LogFlow(("mmR3Save:\n"));
518
519	/* (PGM saves the physical memory.) */
520	SSMR3PutU64(pSSM, pVM->mm.s.cBasePages);
521	return SSMR3PutU64(pSSM, pVM->mm.s.cbRamBase);
522	}
523
524
525	/**
526	* Execute state load operation.
527	*
528	* @returns VBox status code.
529	* @param pVM The cross context VM structure.
530	* @param pSSM SSM operation handle.
531	* @param uVersion Data layout version.
532	* @param uPass The data pass.
533	*/
534	static DECLCALLBACK(int) mmR3Load(PVM pVM, PSSMHANDLE pSSM, uint32_t uVersion, uint32_t uPass)
535	{
536	LogFlow(("mmR3Load:\n"));
537	Assert(uPass == SSM_PASS_FINAL); NOREF(uPass);
538
539	/*
540	* Validate version.
541	*/
542	if ( SSM_VERSION_MAJOR_CHANGED(uVersion, MM_SAVED_STATE_VERSION)
543	\|\| !uVersion)
544	{
545	AssertMsgFailed(("mmR3Load: Invalid version uVersion=%d!\n", uVersion));
546	return VERR_SSM_UNSUPPORTED_DATA_UNIT_VERSION;
547	}
548
549	/*
550	* Check the cBasePages and cbRamBase values.
551	*/
552	int rc;
553	RTUINT cb1;
554
555	/* cBasePages (ignored) */
556	uint64_t cPages;
557	if (uVersion >= 2)
558	rc = SSMR3GetU64(pSSM, &cPages);
559	else
560	{
561	rc = SSMR3GetUInt(pSSM, &cb1);
562	cPages = cb1 >> PAGE_SHIFT;
563	}
564	if (RT_FAILURE(rc))
565	return rc;
566
567	/* cbRamBase */
568	uint64_t cb;
569	if (uVersion != 1)
570	rc = SSMR3GetU64(pSSM, &cb);
571	else
572	{
573	rc = SSMR3GetUInt(pSSM, &cb1);
574	cb = cb1;
575	}
576	if (RT_FAILURE(rc))
577	return rc;
578	AssertLogRelMsgReturn(cb == pVM->mm.s.cbRamBase,
579	("Memory configuration has changed. cbRamBase=%#RX64 save=%#RX64\n", pVM->mm.s.cbRamBase, cb),
580	VERR_SSM_LOAD_MEMORY_SIZE_MISMATCH);
581
582	/* (PGM restores the physical memory.) */
583	return rc;
584	}
585
586
587	/**
588	* Updates GMM with memory reservation changes.
589	*
590	* Called when MM::cbRamRegistered, MM::cShadowPages or MM::cFixedPages changes.
591	*
592	* @returns VBox status code - see GMMR0UpdateReservation.
593	* @param pVM The cross context VM structure.
594	*/
595	int mmR3UpdateReservation(PVM pVM)
596	{
597	VM_ASSERT_EMT(pVM);
598	if (pVM->mm.s.fDoneMMR3InitPaging)
599	return GMMR3UpdateReservation(pVM,
600	RT_MAX(pVM->mm.s.cBasePages + pVM->mm.s.cHandyPages, 1),
601	RT_MAX(pVM->mm.s.cShadowPages, 1),
602	RT_MAX(pVM->mm.s.cFixedPages, 1));
603	return VINF_SUCCESS;
604	}
605
606
607	/**
608	* Interface for PGM to increase the reservation of RAM and ROM pages.
609	*
610	* This can be called before MMR3InitPaging.
611	*
612	* @returns VBox status code. Will set VM error on failure.
613	* @param pVM The cross context VM structure.
614	* @param cAddBasePages The number of pages to add.
615	*/
616	VMMR3DECL(int) MMR3IncreaseBaseReservation(PVM pVM, uint64_t cAddBasePages)
617	{
618	uint64_t cOld = pVM->mm.s.cBasePages;
619	pVM->mm.s.cBasePages += cAddBasePages;
620	LogFlow(("MMR3IncreaseBaseReservation: +%RU64 (%RU64 -> %RU64)\n", cAddBasePages, cOld, pVM->mm.s.cBasePages));
621	int rc = mmR3UpdateReservation(pVM);
622	if (RT_FAILURE(rc))
623	{
624	VMSetError(pVM, rc, RT_SRC_POS, N_("Failed to reserved physical memory for the RAM (%#RX64 -> %#RX64 + %#RX32)"),
625	cOld, pVM->mm.s.cBasePages, pVM->mm.s.cHandyPages);
626	pVM->mm.s.cBasePages = cOld;
627	}
628	return rc;
629	}
630
631
632	/**
633	* Interface for PGM to make reservations for handy pages in addition to the
634	* base memory.
635	*
636	* This can be called before MMR3InitPaging.
637	*
638	* @returns VBox status code. Will set VM error on failure.
639	* @param pVM The cross context VM structure.
640	* @param cHandyPages The number of handy pages.
641	*/
642	VMMR3DECL(int) MMR3ReserveHandyPages(PVM pVM, uint32_t cHandyPages)
643	{
644	AssertReturn(!pVM->mm.s.cHandyPages, VERR_WRONG_ORDER);
645
646	pVM->mm.s.cHandyPages = cHandyPages;
647	LogFlow(("MMR3ReserveHandyPages: %RU32 (base %RU64)\n", pVM->mm.s.cHandyPages, pVM->mm.s.cBasePages));
648	int rc = mmR3UpdateReservation(pVM);
649	if (RT_FAILURE(rc))
650	{
651	VMSetError(pVM, rc, RT_SRC_POS, N_("Failed to reserved physical memory for the RAM (%#RX64 + %#RX32)"),
652	pVM->mm.s.cBasePages, pVM->mm.s.cHandyPages);
653	pVM->mm.s.cHandyPages = 0;
654	}
655	return rc;
656	}
657
658
659	/**
660	* Interface for PGM to adjust the reservation of fixed pages.
661	*
662	* This can be called before MMR3InitPaging.
663	*
664	* @returns VBox status code. Will set VM error on failure.
665	* @param pVM The cross context VM structure.
666	* @param cDeltaFixedPages The number of pages to add (positive) or subtract (negative).
667	* @param pszDesc Some description associated with the reservation.
668	*/
669	VMMR3DECL(int) MMR3AdjustFixedReservation(PVM pVM, int32_t cDeltaFixedPages, const char *pszDesc)
670	{
671	const uint32_t cOld = pVM->mm.s.cFixedPages;
672	pVM->mm.s.cFixedPages += cDeltaFixedPages;
673	LogFlow(("MMR3AdjustFixedReservation: %d (%u -> %u)\n", cDeltaFixedPages, cOld, pVM->mm.s.cFixedPages));
674	int rc = mmR3UpdateReservation(pVM);
675	if (RT_FAILURE(rc))
676	{
677	VMSetError(pVM, rc, RT_SRC_POS, N_("Failed to reserve physical memory (%#x -> %#x; %s)"),
678	cOld, pVM->mm.s.cFixedPages, pszDesc);
679	pVM->mm.s.cFixedPages = cOld;
680	}
681	return rc;
682	}
683
684
685	/**
686	* Interface for PGM to update the reservation of shadow pages.
687	*
688	* This can be called before MMR3InitPaging.
689	*
690	* @returns VBox status code. Will set VM error on failure.
691	* @param pVM The cross context VM structure.
692	* @param cShadowPages The new page count.
693	*/
694	VMMR3DECL(int) MMR3UpdateShadowReservation(PVM pVM, uint32_t cShadowPages)
695	{
696	const uint32_t cOld = pVM->mm.s.cShadowPages;
697	pVM->mm.s.cShadowPages = cShadowPages;
698	LogFlow(("MMR3UpdateShadowReservation: %u -> %u\n", cOld, pVM->mm.s.cShadowPages));
699	int rc = mmR3UpdateReservation(pVM);
700	if (RT_FAILURE(rc))
701	{
702	VMSetError(pVM, rc, RT_SRC_POS, N_("Failed to reserve physical memory for shadow page tables (%#x -> %#x)"), cOld, pVM->mm.s.cShadowPages);
703	pVM->mm.s.cShadowPages = cOld;
704	}
705	return rc;
706	}
707
708
709	/**
710	* Convert HC Physical address to HC Virtual address.
711	*
712	* @returns VBox status code.
713	* @param pVM The cross context VM structure.
714	* @param HCPhys The host context virtual address.
715	* @param ppv Where to store the resulting address.
716	* @thread The Emulation Thread.
717	*
718	* @remarks Avoid whenever possible.
719	* Intended for the debugger facility only.
720	* @todo Rename to indicate the special usage.
721	*/
722	VMMR3DECL(int) MMR3HCPhys2HCVirt(PVM pVM, RTHCPHYS HCPhys, void **ppv)
723	{
724	#if 0
725	/*
726	* Try page tables.
727	*/
728	int rc = MMPagePhys2PageTry(pVM, HCPhys, ppv);
729	if (RT_SUCCESS(rc))
730	return rc;
731	#endif
732
733	/*
734	* Iterate thru the lookup records for HMA.
735	*/
736	uint32_t off = HCPhys & PAGE_OFFSET_MASK;
737	HCPhys &= X86_PTE_PAE_PG_MASK;
738	PMMLOOKUPHYPER pCur = (PMMLOOKUPHYPER)((uint8_t *)pVM->mm.s.CTX_SUFF(pHyperHeap) + pVM->mm.s.offLookupHyper);
739	for (;;)
740	{
741	switch (pCur->enmType)
742	{
743	case MMLOOKUPHYPERTYPE_LOCKED:
744	{
745	PCRTHCPHYS paHCPhysPages = pCur->u.Locked.paHCPhysPages;
746	size_t iPage = pCur->cb >> PAGE_SHIFT;
747	while (iPage-- > 0)
748	if (paHCPhysPages[iPage] == HCPhys)
749	{
750	ppv = (char )pCur->u.Locked.pvR3 + (iPage << PAGE_SHIFT) + off;
751	return VINF_SUCCESS;
752	}
753	break;
754	}
755
756	case MMLOOKUPHYPERTYPE_HCPHYS:
757	if (pCur->u.HCPhys.HCPhys - HCPhys < pCur->cb)
758	{
759	ppv = (uint8_t )pCur->u.HCPhys.pvR3 + pCur->u.HCPhys.HCPhys - HCPhys + off;
760	return VINF_SUCCESS;
761	}
762	break;
763
764	case MMLOOKUPHYPERTYPE_GCPHYS: /* (for now we'll not allow these kind of conversions) */
765	case MMLOOKUPHYPERTYPE_MMIO2:
766	case MMLOOKUPHYPERTYPE_DYNAMIC:
767	break;
768
769	default:
770	AssertMsgFailed(("enmType=%d\n", pCur->enmType));
771	break;
772	}
773
774	/* next */
775	if (pCur->offNext == (int32_t)NIL_OFFSET)
776	break;
777	pCur = (PMMLOOKUPHYPER)((uint8_t *)pCur + pCur->offNext);
778	}
779	/* give up */
780	return VERR_INVALID_POINTER;
781	}
782
783
784
785	/**
786	* Get the size of the base RAM.
787	* This usually means the size of the first contiguous block of physical memory.
788	*
789	* @returns The guest base RAM size.
790	* @param pVM The cross context VM structure.
791	* @thread Any.
792	*
793	* @deprecated
794	*/
795	VMMR3DECL(uint64_t) MMR3PhysGetRamSize(PVM pVM)
796	{
797	return pVM->mm.s.cbRamBase;
798	}
799
800
801	/**
802	* Get the size of RAM below 4GB (starts at address 0x00000000).
803	*
804	* @returns The amount of RAM below 4GB in bytes.
805	* @param pVM The cross context VM structure.
806	* @thread Any.
807	*/
808	VMMR3DECL(uint32_t) MMR3PhysGetRamSizeBelow4GB(PVM pVM)
809	{
810	VM_ASSERT_VALID_EXT_RETURN(pVM, UINT32_MAX);
811	return pVM->mm.s.cbRamBelow4GB;
812	}
813
814
815	/**
816	* Get the size of RAM above 4GB (starts at address 0x000100000000).
817	*
818	* @returns The amount of RAM above 4GB in bytes.
819	* @param pVM The cross context VM structure.
820	* @thread Any.
821	*/
822	VMMR3DECL(uint64_t) MMR3PhysGetRamSizeAbove4GB(PVM pVM)
823	{
824	VM_ASSERT_VALID_EXT_RETURN(pVM, UINT64_MAX);
825	return pVM->mm.s.cbRamAbove4GB;
826	}
827
828
829	/**
830	* Get the size of the RAM hole below 4GB.
831	*
832	* @returns Size in bytes.
833	* @param pVM The cross context VM structure.
834	* @thread Any.
835	*/
836	VMMR3DECL(uint32_t) MMR3PhysGet4GBRamHoleSize(PVM pVM)
837	{
838	VM_ASSERT_VALID_EXT_RETURN(pVM, UINT32_MAX);
839	return pVM->mm.s.cbRamHole;
840	}
841

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source: vbox/trunk/src/VBox/VMM/VMMR3/MM.cpp@ 92363

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