MM.cpp@ 106476

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1	/* $Id: MM.cpp 106061 2024-09-16 14:03:52Z vboxsync $ */
2	/** @file
3	* MM - Memory Manager.
4	*/
5
6	/*
7	* Copyright (C) 2006-2024 Oracle and/or its affiliates.
8	*
9	* This file is part of VirtualBox base platform packages, as
10	* available from https://www.virtualbox.org.
11	*
12	* This program is free software; you can redistribute it and/or
13	* modify it under the terms of the GNU General Public License
14	* as published by the Free Software Foundation, in version 3 of the
15	* License.
16	*
17	* This program is distributed in the hope that it will be useful, but
18	* WITHOUT ANY WARRANTY; without even the implied warranty of
19	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
20	* General Public License for more details.
21	*
22	* You should have received a copy of the GNU General Public License
23	* along with this program; if not, see <https://www.gnu.org/licenses>.
24	*
25	* SPDX-License-Identifier: GPL-3.0-only
26	*/
27
28
29	/** @page pg_mm MM - The Memory Manager
30	*
31	* The memory manager is in charge of the following memory:
32	* - Hypervisor Memory Area (HMA) - Address space management (obsolete in 6.1).
33	* - Hypervisor Heap - A memory heap that lives in all contexts.
34	* - User-Kernel Heap - A memory heap lives in both host context.
35	* - Tagged ring-3 heap.
36	* - Page pools - Primarily used by PGM for shadow page tables.
37	* - Locked process memory - Guest RAM and other. (reduce/obsolete this)
38	* - Physical guest memory (RAM & ROM) - Moving to PGM. (obsolete this)
39	*
40	* The global memory manager (GMM) is the global counter part / partner of MM.
41	* MM will provide therefore ring-3 callable interfaces for some of the GMM APIs
42	* related to resource tracking (PGM is the user).
43	*
44	* @see grp_mm
45	*
46	*
47	* @section sec_mm_hma Hypervisor Memory Area - Obsolete in 6.1
48	*
49	* The HMA is used when executing in raw-mode. We borrow, with the help of
50	* PGMMap, some unused space (one or more page directory entries to be precise)
51	* in the guest's virtual memory context. PGM will monitor the guest's virtual
52	* address space for changes and relocate the HMA when required.
53	*
54	* To give some idea what's in the HMA, study the 'info hma' output:
55	* @verbatim
56	VBoxDbg> info hma
57	Hypervisor Memory Area (HMA) Layout: Base 00000000a0000000, 0x00800000 bytes
58	00000000a05cc000-00000000a05cd000 DYNAMIC fence
59	00000000a05c4000-00000000a05cc000 DYNAMIC Dynamic mapping
60	00000000a05c3000-00000000a05c4000 DYNAMIC fence
61	00000000a05b8000-00000000a05c3000 DYNAMIC Paging
62	00000000a05b6000-00000000a05b8000 MMIO2 0000000000000000 PCNetShMem
63	00000000a0536000-00000000a05b6000 MMIO2 0000000000000000 VGA VRam
64	00000000a0523000-00000000a0536000 00002aaab3d0c000 LOCKED autofree alloc once (PDM_DEVICE)
65	00000000a0522000-00000000a0523000 DYNAMIC fence
66	00000000a051e000-00000000a0522000 00002aaab36f5000 LOCKED autofree VBoxDD2RC.rc
67	00000000a051d000-00000000a051e000 DYNAMIC fence
68	00000000a04eb000-00000000a051d000 00002aaab36c3000 LOCKED autofree VBoxDDRC.rc
69	00000000a04ea000-00000000a04eb000 DYNAMIC fence
70	00000000a04e9000-00000000a04ea000 00002aaab36c2000 LOCKED autofree ram range (High ROM Region)
71	00000000a04e8000-00000000a04e9000 DYNAMIC fence
72	00000000a040e000-00000000a04e8000 00002aaab2e6d000 LOCKED autofree VMMRC.rc
73	00000000a0208000-00000000a040e000 00002aaab2c67000 LOCKED autofree alloc once (PATM)
74	00000000a01f7000-00000000a0208000 00002aaaab92d000 LOCKED autofree alloc once (SELM)
75	00000000a01e7000-00000000a01f7000 00002aaaab5e8000 LOCKED autofree alloc once (SELM)
76	00000000a01e6000-00000000a01e7000 DYNAMIC fence
77	00000000a01e5000-00000000a01e6000 00002aaaab5e7000 HCPHYS 00000000c363c000 Core Code
78	00000000a01e4000-00000000a01e5000 DYNAMIC fence
79	00000000a01e3000-00000000a01e4000 00002aaaaab26000 HCPHYS 00000000619cf000 GIP
80	00000000a01a2000-00000000a01e3000 00002aaaabf32000 LOCKED autofree alloc once (PGM_PHYS)
81	00000000a016b000-00000000a01a2000 00002aaab233f000 LOCKED autofree alloc once (PGM_POOL)
82	00000000a016a000-00000000a016b000 DYNAMIC fence
83	00000000a0165000-00000000a016a000 DYNAMIC CR3 mapping
84	00000000a0164000-00000000a0165000 DYNAMIC fence
85	00000000a0024000-00000000a0164000 00002aaab215f000 LOCKED autofree Heap
86	00000000a0023000-00000000a0024000 DYNAMIC fence
87	00000000a0001000-00000000a0023000 00002aaab1d24000 LOCKED pages VM
88	00000000a0000000-00000000a0001000 DYNAMIC fence
89	@endverbatim
90	*
91	*
92	* @section sec_mm_hyperheap Hypervisor Heap
93	*
94	* The heap is accessible from ring-3, ring-0 and the raw-mode context. That
95	* said, it's not necessarily mapped into ring-0 on if that's possible since we
96	* don't wish to waste kernel address space without a good reason.
97	*
98	* Allocations within the heap are always in the same relative position in all
99	* contexts, so, it's possible to use offset based linking. In fact, the heap is
100	* internally using offset based linked lists tracking heap blocks. We use
101	* offset linked AVL trees and lists in a lot of places where share structures
102	* between RC, R3 and R0, so this is a strict requirement of the heap. However
103	* this means that we cannot easily extend the heap since the extension won't
104	* necessarily be in the continuation of the current heap memory in all (or any)
105	* context.
106	*
107	* All allocations are tagged. Per tag allocation statistics will be maintaining
108	* and exposed thru STAM when VBOX_WITH_STATISTICS is defined.
109	*
110	*
111	* @section sec_mm_r3heap Tagged Ring-3 Heap
112	*
113	* The ring-3 heap is a wrapper around the RTMem API adding allocation
114	* statistics and automatic cleanup on VM destruction.
115	*
116	* Per tag allocation statistics will be maintaining and exposed thru STAM when
117	* VBOX_WITH_STATISTICS is defined.
118	*
119	*
120	* @section sec_mm_page Page Pool
121	*
122	* The MM manages a page pool from which other components can allocate locked,
123	* page aligned and page sized memory objects. The pool provides facilities to
124	* convert back and forth between (host) physical and virtual addresses (within
125	* the pool of course). Several specialized interfaces are provided for the most
126	* common allocations and conversions to save the caller from bothersome casting
127	* and extra parameter passing.
128	*
129	*
130	* @section sec_mm_locked Locked Process Memory
131	*
132	* MM manages the locked process memory. This is used for a bunch of things
133	* (count the LOCKED entries in the 'info hma' output found in @ref sec_mm_hma),
134	* but the main consumer of memory is currently for guest RAM. There is an
135	* ongoing rewrite that will move all the guest RAM allocation to PGM and
136	* GMM.
137	*
138	* The locking of memory is something doing in cooperation with the VirtualBox
139	* support driver, SUPDrv (aka. VBoxDrv), thru the support library API,
140	* SUPR3 (aka. SUPLib).
141	*
142	*
143	* @section sec_mm_phys Physical Guest Memory
144	*
145	* MM is currently managing the physical memory for the guest. It relies heavily
146	* on PGM for this. There is an ongoing rewrite that will move this to PGM. (The
147	* rewrite is driven by the need for more flexible guest ram allocation, but
148	* also motivated by the fact that MMPhys is just adding stupid bureaucracy and
149	* that MMR3PhysReserve is a totally weird artifact that must go away.)
150	*
151	*/
152
153
154	/*********************************************************************************************************************************
155	* Header Files *
156	*********************************************************************************************************************************/
157	#define LOG_GROUP LOG_GROUP_MM
158	#include <VBox/vmm/mm.h>
159	#include <VBox/vmm/pgm.h>
160	#include <VBox/vmm/cfgm.h>
161	#include <VBox/vmm/ssm.h>
162	#include <VBox/vmm/gmm.h>
163	#include "MMInternal.h"
164	#include <VBox/vmm/vm.h>
165	#include <VBox/vmm/uvm.h>
166	#include <VBox/err.h>
167	#include <VBox/param.h>
168
169	#include <VBox/log.h>
170	#include <iprt/alloc.h>
171	#include <iprt/assert.h>
172	#include <iprt/string.h>
173	#if defined(VBOX_VMM_TARGET_ARMV8)
174	# include <iprt/file.h>
175	#endif
176
177
178	/*********************************************************************************************************************************
179	* Defined Constants And Macros *
180	*********************************************************************************************************************************/
181	/** The current saved state version of MM. */
182	#define MM_SAVED_STATE_VERSION 2
183
184
185	/*********************************************************************************************************************************
186	* Internal Functions *
187	*********************************************************************************************************************************/
188	static DECLCALLBACK(int) mmR3Save(PVM pVM, PSSMHANDLE pSSM);
189	static DECLCALLBACK(int) mmR3Load(PVM pVM, PSSMHANDLE pSSM, uint32_t uVersion, uint32_t uPass);
190
191
192
193
194	/**
195	* Initializes the MM members of the UVM.
196	*
197	* This is currently only the ring-3 heap.
198	*
199	* @returns VBox status code.
200	* @param pUVM Pointer to the user mode VM structure.
201	*/
202	VMMR3DECL(int) MMR3InitUVM(PUVM pUVM)
203	{
204	/*
205	* Assert sizes and order.
206	*/
207	AssertCompile(sizeof(pUVM->mm.s) <= sizeof(pUVM->mm.padding));
208	AssertRelease(sizeof(pUVM->mm.s) <= sizeof(pUVM->mm.padding));
209	Assert(!pUVM->mm.s.pHeap);
210
211	/*
212	* Init the heap.
213	*/
214	int rc = mmR3HeapCreateU(pUVM, &pUVM->mm.s.pHeap);
215	if (RT_SUCCESS(rc))
216	return VINF_SUCCESS;
217	return rc;
218	}
219
220
221	/**
222	* Initializes the MM.
223	*
224	* MM is managing the virtual address space (among other things) and
225	* setup the hypervisor memory area mapping in the VM structure and
226	* the hypervisor alloc-only-heap. Assuming the current init order
227	* and components the hypervisor memory area looks like this:
228	* -# VM Structure.
229	* -# Hypervisor alloc only heap (also call Hypervisor memory region).
230	* -# Core code.
231	*
232	* MM determines the virtual address of the hypervisor memory area by
233	* checking for location at previous run. If that property isn't available
234	* it will choose a default starting location, currently 0xa0000000.
235	*
236	* @returns VBox status code.
237	* @param pVM The cross context VM structure.
238	*/
239	VMMR3DECL(int) MMR3Init(PVM pVM)
240	{
241	LogFlow(("MMR3Init\n"));
242
243	/*
244	* Assert alignment, sizes and order.
245	*/
246	AssertRelease(!(RT_UOFFSETOF(VM, mm.s) & 31));
247	AssertRelease(sizeof(pVM->mm.s) <= sizeof(pVM->mm.padding));
248
249	/*
250	* Register the saved state data unit.
251	*/
252	int 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	return rc;
271	}
272
273
274	#if defined(VBOX_VMM_TARGET_ARMV8)
275	/**
276	* Initializes the given RAM range with data from the given file.
277	*
278	* @returns VBox status code.
279	* @param pVM The cross context VM structure.
280	* @param GCPhysStart Where to start putting the file content.
281	* @param pszFilename The file to read the data from.
282	*/
283	static int mmR3RamRegionInitFromFile(PVM pVM, RTGCPHYS GCPhysStart, const char *pszFilename)
284	{
285	RTFILE hFile = NIL_RTFILE;
286	int rc = RTFileOpen(&hFile, pszFilename, RTFILE_O_READ \| RTFILE_O_OPEN \| RTFILE_O_DENY_WRITE);
287	if (RT_SUCCESS(rc))
288	{
289	uint8_t abRead[GUEST_PAGE_SIZE];
290	RTGCPHYS GCPhys = GCPhysStart;
291
292	for (;;)
293	{
294	size_t cbThisRead = 0;
295	rc = RTFileRead(hFile, &abRead[0], sizeof(abRead), &cbThisRead);
296	if (RT_FAILURE(rc))
297	break;
298
299	rc = PGMPhysSimpleWriteGCPhys(pVM, GCPhys, &abRead[0], cbThisRead);
300	if (RT_FAILURE(rc))
301	break;
302
303	GCPhys += cbThisRead;
304	if (cbThisRead < sizeof(abRead))
305	break;
306	}
307
308	RTFileClose(hFile);
309	}
310
311	if (RT_FAILURE(rc))
312	LogRel(("RAM#%RGp: Loading file %s failed -> %Rrc\n", GCPhysStart, pszFilename, rc));
313
314	return rc;
315	}
316
317
318	/**
319	* This sets up the RAM ranges from the VM config.
320	*
321	* @returns VBox status code.
322	* @param pVM The cross context VM structure.
323	* @param pMMCfg Pointer to the CFGM node holding the RAM config.
324	*
325	* @note On ARM there is no "standard" way to handle RAM like on x86.
326	* Every SoC can have multiple RAM regions scattered across the whole
327	* address space so we have to be much more flexible here.
328	*/
329	static int mmR3InitRamArmV8(PVM pVM, PCFGMNODE pMMCfg)
330	{
331	int rc = VINF_SUCCESS;
332	PCFGMNODE pMemRegions = CFGMR3GetChild(pMMCfg, "MemRegions");
333
334	pVM->mm.s.cbRamBase = 0;
335	pVM->mm.s.cbRamHole = 0;
336	pVM->mm.s.cbRamBelow4GB = 0;
337	pVM->mm.s.cbRamAbove4GB = 0;
338
339	for (PCFGMNODE pCur = CFGMR3GetFirstChild(pMemRegions); pCur; pCur = CFGMR3GetNextChild(pCur))
340	{
341	char szMemRegion[512]; RT_ZERO(szMemRegion);
342	rc = CFGMR3GetName(pCur, &szMemRegion[0], sizeof(szMemRegion));
343	if (RT_FAILURE(rc))
344	{
345	LogRel(("Failed to query memory region name -> %Rrc\n", rc));
346	break;
347	}
348
349	uint64_t u64GCPhysStart = 0;
350	rc = CFGMR3QueryU64(pCur, "GCPhysStart", &u64GCPhysStart);
351	if (RT_FAILURE(rc))
352	{
353	LogRel(("Failed to query \"GCPhysStart\" for memory region %s -> %Rrc\n", szMemRegion, rc));
354	break;
355	}
356
357	uint64_t u64MemSize = 0;
358	rc = CFGMR3QueryU64(pCur, "Size", &u64MemSize);
359	if (RT_FAILURE(rc))
360	{
361	LogRel(("Failed to query \"Size\" for memory region %s -> %Rrc\n", szMemRegion, rc));
362	break;
363	}
364
365	rc = PGMR3PhysRegisterRam(pVM, u64GCPhysStart, u64MemSize, "Conventional RAM");
366	if (RT_FAILURE(rc))
367	{
368	LogRel(("Failed to register memory region '%s' GCPhysStart=%RGp Size=%#RX64 -> %Rrc\n",
369	szMemRegion, u64GCPhysStart, u64MemSize));
370	break;
371	}
372
373	char *pszFilename = NULL;
374	rc = CFGMR3QueryStringAlloc(pCur, "PrepopulateFromFile", &pszFilename);
375	if (RT_SUCCESS(rc))
376	{
377	rc = mmR3RamRegionInitFromFile(pVM, u64GCPhysStart, pszFilename);
378	MMR3HeapFree(pszFilename);
379	if (RT_FAILURE(rc))
380	break;
381	}
382	else if (rc != VERR_CFGM_VALUE_NOT_FOUND)
383	{
384	LogRel(("Failed to query \"PrepopulateFromFile\" for memory region %s -> %Rrc\n", szMemRegion, rc));
385	break;
386	}
387	else
388	rc = VINF_SUCCESS;
389
390	pVM->mm.s.cbRamBase += u64MemSize;
391	if (u64GCPhysStart >= _4G)
392	pVM->mm.s.cbRamAbove4GB += u64MemSize;
393	else if (u64GCPhysStart + u64MemSize > _4G)
394	{
395	uint64_t cbRamAbove4GB = (u64GCPhysStart + u64MemSize) - _4G;
396	pVM->mm.s.cbRamAbove4GB += cbRamAbove4GB;
397	pVM->mm.s.cbRamBelow4GB += (u64MemSize - cbRamAbove4GB);
398	}
399	else
400	pVM->mm.s.cbRamBelow4GB += (uint32_t)u64MemSize;
401	}
402
403	return rc;
404	}
405	#endif
406
407
408	/**
409	* Initializes the MM parts which depends on PGM being initialized.
410	*
411	* @returns VBox status code.
412	* @param pVM The cross context VM structure.
413	* @remark No cleanup necessary since MMR3Term() will be called on failure.
414	*/
415	VMMR3DECL(int) MMR3InitPaging(PVM pVM)
416	{
417	LogFlow(("MMR3InitPaging:\n"));
418
419	/*
420	* Query the CFGM values.
421	*/
422	int rc;
423	PCFGMNODE pMMCfg = CFGMR3GetChild(CFGMR3GetRoot(pVM), "MM");
424	if (!pMMCfg)
425	{
426	rc = CFGMR3InsertNode(CFGMR3GetRoot(pVM), "MM", &pMMCfg);
427	AssertRCReturn(rc, rc);
428	}
429
430	#if defined(VBOX_VMM_TARGET_ARMV8)
431	rc = mmR3InitRamArmV8(pVM, pMMCfg);
432	#else
433	/** @cfgm{/RamSize, uint64_t, 0, 16TB, 0}
434	* Specifies the size of the base RAM that is to be set up during
435	* VM initialization.
436	*/
437	uint64_t cbRam;
438	rc = CFGMR3QueryU64(CFGMR3GetRoot(pVM), "RamSize", &cbRam);
439	if (rc == VERR_CFGM_VALUE_NOT_FOUND)
440	cbRam = 0;
441	else
442	AssertMsgRCReturn(rc, ("Configuration error: Failed to query integer \"RamSize\", rc=%Rrc.\n", rc), rc);
443	AssertLogRelMsg(!(cbRam & ~X86_PTE_PAE_PG_MASK), ("%RGp X86_PTE_PAE_PG_MASK=%RX64\n", cbRam, X86_PTE_PAE_PG_MASK));
444	AssertLogRelMsgReturn(cbRam <= GMM_GCPHYS_LAST, ("cbRam=%RGp GMM_GCPHYS_LAST=%RX64\n", cbRam, GMM_GCPHYS_LAST), VERR_OUT_OF_RANGE);
445	cbRam &= X86_PTE_PAE_PG_MASK;
446	pVM->mm.s.cbRamBase = cbRam;
447
448	/** @cfgm{/RamHoleSize, uint32_t, 0, 4032MB, 512MB}
449	* Specifies the size of the memory hole. The memory hole is used
450	* to avoid mapping RAM to the range normally used for PCI memory regions.
451	* Must be aligned on a 4MB boundary. */
452	uint32_t cbRamHole;
453	rc = CFGMR3QueryU32Def(CFGMR3GetRoot(pVM), "RamHoleSize", &cbRamHole, MM_RAM_HOLE_SIZE_DEFAULT);
454	AssertLogRelMsgRCReturn(rc, ("Configuration error: Failed to query integer \"RamHoleSize\", rc=%Rrc.\n", rc), rc);
455	AssertLogRelMsgReturn(cbRamHole <= 4032U * _1M,
456	("Configuration error: \"RamHoleSize\"=%#RX32 is too large.\n", cbRamHole), VERR_OUT_OF_RANGE);
457	AssertLogRelMsgReturn(cbRamHole > 16 * _1M,
458	("Configuration error: \"RamHoleSize\"=%#RX32 is too small.\n", cbRamHole), VERR_OUT_OF_RANGE);
459	AssertLogRelMsgReturn(!(cbRamHole & (_4M - 1)),
460	("Configuration error: \"RamHoleSize\"=%#RX32 is misaligned.\n", cbRamHole), VERR_OUT_OF_RANGE);
461	uint64_t const offRamHole = _4G - cbRamHole;
462	if (cbRam < offRamHole)
463	Log(("MM: %RU64 bytes of RAM\n", cbRam));
464	else
465	Log(("MM: %RU64 bytes of RAM with a hole at %RU64 up to 4GB.\n", cbRam, offRamHole));
466
467	/** @cfgm{/MM/Policy, string, no overcommitment}
468	* Specifies the policy to use when reserving memory for this VM. The recognized
469	* value is 'no overcommitment' (default). See GMMPOLICY.
470	*/
471	GMMOCPOLICY enmOcPolicy;
472	char sz[64];
473	rc = CFGMR3QueryString(CFGMR3GetRoot(pVM), "Policy", sz, sizeof(sz));
474	if (RT_SUCCESS(rc))
475	{
476	if ( !RTStrICmp(sz, "no_oc")
477	\|\| !RTStrICmp(sz, "no overcommitment"))
478	enmOcPolicy = GMMOCPOLICY_NO_OC;
479	else
480	return VMSetError(pVM, VERR_INVALID_PARAMETER, RT_SRC_POS, "Unknown \"MM/Policy\" value \"%s\"", sz);
481	}
482	else if (rc == VERR_CFGM_VALUE_NOT_FOUND)
483	enmOcPolicy = GMMOCPOLICY_NO_OC;
484	else
485	AssertMsgFailedReturn(("Configuration error: Failed to query string \"MM/Policy\", rc=%Rrc.\n", rc), rc);
486
487	/** @cfgm{/MM/Priority, string, normal}
488	* Specifies the memory priority of this VM. The priority comes into play when the
489	* system is overcommitted and the VMs needs to be milked for memory. The recognized
490	* values are 'low', 'normal' (default) and 'high'. See GMMPRIORITY.
491	*/
492	GMMPRIORITY enmPriority;
493	rc = CFGMR3QueryString(CFGMR3GetRoot(pVM), "Priority", sz, sizeof(sz));
494	if (RT_SUCCESS(rc))
495	{
496	if (!RTStrICmp(sz, "low"))
497	enmPriority = GMMPRIORITY_LOW;
498	else if (!RTStrICmp(sz, "normal"))
499	enmPriority = GMMPRIORITY_NORMAL;
500	else if (!RTStrICmp(sz, "high"))
501	enmPriority = GMMPRIORITY_HIGH;
502	else
503	return VMSetError(pVM, VERR_INVALID_PARAMETER, RT_SRC_POS, "Unknown \"MM/Priority\" value \"%s\"", sz);
504	}
505	else if (rc == VERR_CFGM_VALUE_NOT_FOUND)
506	enmPriority = GMMPRIORITY_NORMAL;
507	else
508	AssertMsgFailedReturn(("Configuration error: Failed to query string \"MM/Priority\", rc=%Rrc.\n", rc), rc);
509
510	/*
511	* Make the initial memory reservation with GMM.
512	*/
513	uint32_t const cbUma = _1M - 640*_1K;
514	uint64_t cBasePages = ((cbRam - cbUma) >> GUEST_PAGE_SHIFT) + pVM->mm.s.cBasePages;
515	rc = GMMR3InitialReservation(pVM,
516	RT_MAX(cBasePages + pVM->mm.s.cHandyPages, 1),
517	RT_MAX(pVM->mm.s.cShadowPages, 1),
518	RT_MAX(pVM->mm.s.cFixedPages, 1),
519	enmOcPolicy,
520	enmPriority);
521	if (RT_FAILURE(rc))
522	{
523	if (rc == VERR_GMM_MEMORY_RESERVATION_DECLINED)
524	return VMSetError(pVM, rc, RT_SRC_POS,
525	N_("Insufficient free memory to start the VM (cbRam=%#RX64 enmOcPolicy=%d enmPriority=%d)"),
526	cbRam, enmOcPolicy, enmPriority);
527	return VMSetError(pVM, rc, RT_SRC_POS, "GMMR3InitialReservation(,%#RX64,0,0,%d,%d)",
528	cbRam >> GUEST_PAGE_SHIFT, enmOcPolicy, enmPriority);
529	}
530
531	/*
532	* If RamSize is 0 we're done now.
533	*/
534	if (cbRam < GUEST_PAGE_SIZE)
535	{
536	Log(("MM: No RAM configured\n"));
537	return VINF_SUCCESS;
538	}
539
540	/*
541	* Setup the base ram (PGM).
542	*/
543	pVM->mm.s.cbRamHole = cbRamHole;
544	pVM->mm.s.cbRamBelow4GB = cbRam > offRamHole ? offRamHole : cbRam;
545	pVM->mm.s.cbRamAbove4GB = cbRam > offRamHole ? cbRam - offRamHole : 0;
546
547	/* First the conventional memory: */
548	rc = PGMR3PhysRegisterRam(pVM, 0, RT_MIN(cbRam, 640*_1K), "Conventional RAM");
549	if (RT_SUCCESS(rc) && cbRam >= _1M)
550	{
551	/* The extended memory from 1MiB to 2MiB to align better with large pages in NEM mode: */
552	rc = PGMR3PhysRegisterRam(pVM, _1M, RT_MIN(_1M, cbRam - _1M), "Extended RAM, 1-2MB");
553	if (cbRam > _2M)
554	{
555	/* The extended memory from 2MiB up to 4GiB: */
556	rc = PGMR3PhysRegisterRam(pVM, _2M, pVM->mm.s.cbRamBelow4GB - _2M, "Extended RAM, >2MB");
557
558	/* Then all the memory above 4GiB: */
559	if (RT_SUCCESS(rc) && pVM->mm.s.cbRamAbove4GB > 0)
560	rc = PGMR3PhysRegisterRam(pVM, _4G, cbRam - offRamHole, "Above 4GB Base RAM");
561	}
562	}
563	#endif /* !VBOX_VMM_TARGET_ARMV8 */
564
565	/*
566	* Enabled mmR3UpdateReservation here since we don't want the
567	* PGMR3PhysRegisterRam calls above mess things up.
568	*/
569	pVM->mm.s.fDoneMMR3InitPaging = true;
570	#if !defined(VBOX_VMM_TARGET_ARMV8)
571	AssertMsg(pVM->mm.s.cBasePages == cBasePages \|\| RT_FAILURE(rc), ("%RX64 != %RX64\n", pVM->mm.s.cBasePages, cBasePages));
572	#endif
573
574	LogFlow(("MMR3InitPaging: returns %Rrc\n", rc));
575	return rc;
576	}
577
578
579	/**
580	* Terminates the MM.
581	*
582	* Termination means cleaning up and freeing all resources,
583	* the VM it self is at this point powered off or suspended.
584	*
585	* @returns VBox status code.
586	* @param pVM The cross context VM structure.
587	*/
588	VMMR3DECL(int) MMR3Term(PVM pVM)
589	{
590	RT_NOREF(pVM);
591	return VINF_SUCCESS;
592	}
593
594
595	/**
596	* Terminates the UVM part of MM.
597	*
598	* Termination means cleaning up and freeing all resources,
599	* the VM it self is at this point powered off or suspended.
600	*
601	* @param pUVM Pointer to the user mode VM structure.
602	*/
603	VMMR3DECL(void) MMR3TermUVM(PUVM pUVM)
604	{
605	/*
606	* Destroy the heap.
607	*/
608	mmR3HeapDestroy(pUVM->mm.s.pHeap);
609	pUVM->mm.s.pHeap = NULL;
610	}
611
612
613	/**
614	* Execute state save operation.
615	*
616	* @returns VBox status code.
617	* @param pVM The cross context VM structure.
618	* @param pSSM SSM operation handle.
619	*/
620	static DECLCALLBACK(int) mmR3Save(PVM pVM, PSSMHANDLE pSSM)
621	{
622	LogFlow(("mmR3Save:\n"));
623
624	/* (PGM saves the physical memory.) */
625	SSMR3PutU64(pSSM, pVM->mm.s.cBasePages);
626	return SSMR3PutU64(pSSM, pVM->mm.s.cbRamBase);
627	}
628
629
630	/**
631	* Execute state load operation.
632	*
633	* @returns VBox status code.
634	* @param pVM The cross context VM structure.
635	* @param pSSM SSM operation handle.
636	* @param uVersion Data layout version.
637	* @param uPass The data pass.
638	*/
639	static DECLCALLBACK(int) mmR3Load(PVM pVM, PSSMHANDLE pSSM, uint32_t uVersion, uint32_t uPass)
640	{
641	LogFlow(("mmR3Load:\n"));
642	Assert(uPass == SSM_PASS_FINAL); NOREF(uPass);
643
644	/*
645	* Validate version.
646	*/
647	if ( SSM_VERSION_MAJOR_CHANGED(uVersion, MM_SAVED_STATE_VERSION)
648	\|\| !uVersion)
649	{
650	AssertMsgFailed(("mmR3Load: Invalid version uVersion=%d!\n", uVersion));
651	return VERR_SSM_UNSUPPORTED_DATA_UNIT_VERSION;
652	}
653
654	/*
655	* Check the cBasePages and cbRamBase values.
656	*/
657	int rc;
658	RTUINT cb1;
659
660	/* cBasePages (ignored) */
661	uint64_t cGuestPages;
662	if (uVersion >= 2)
663	rc = SSMR3GetU64(pSSM, &cGuestPages);
664	else
665	{
666	rc = SSMR3GetUInt(pSSM, &cb1);
667	cGuestPages = cb1 >> GUEST_PAGE_SHIFT;
668	}
669	if (RT_FAILURE(rc))
670	return rc;
671
672	/* cbRamBase */
673	uint64_t cb;
674	if (uVersion != 1)
675	rc = SSMR3GetU64(pSSM, &cb);
676	else
677	{
678	rc = SSMR3GetUInt(pSSM, &cb1);
679	cb = cb1;
680	}
681	if (RT_FAILURE(rc))
682	return rc;
683	AssertLogRelMsgReturn(cb == pVM->mm.s.cbRamBase,
684	("Memory configuration has changed. cbRamBase=%#RX64 save=%#RX64\n", pVM->mm.s.cbRamBase, cb),
685	VERR_SSM_LOAD_MEMORY_SIZE_MISMATCH);
686
687	/* (PGM restores the physical memory.) */
688	return rc;
689	}
690
691
692	/**
693	* Updates GMM with memory reservation changes.
694	*
695	* Called when MM::cbRamRegistered, MM::cShadowPages or MM::cFixedPages changes.
696	*
697	* @returns VBox status code - see GMMR0UpdateReservation.
698	* @param pVM The cross context VM structure.
699	*/
700	int mmR3UpdateReservation(PVM pVM)
701	{
702	VM_ASSERT_EMT(pVM);
703	if (pVM->mm.s.fDoneMMR3InitPaging)
704	return GMMR3UpdateReservation(pVM,
705	RT_MAX(pVM->mm.s.cBasePages + pVM->mm.s.cHandyPages, 1),
706	RT_MAX(pVM->mm.s.cShadowPages, 1),
707	RT_MAX(pVM->mm.s.cFixedPages, 1));
708	return VINF_SUCCESS;
709	}
710
711
712	/**
713	* Interface for PGM to increase the reservation of RAM and ROM pages.
714	*
715	* This can be called before MMR3InitPaging.
716	*
717	* @returns VBox status code. Will set VM error on failure.
718	* @param pVM The cross context VM structure.
719	* @param cAddBasePages The number of pages to add.
720	*/
721	VMMR3DECL(int) MMR3IncreaseBaseReservation(PVM pVM, uint64_t cAddBasePages)
722	{
723	uint64_t cOld = pVM->mm.s.cBasePages;
724	pVM->mm.s.cBasePages += cAddBasePages;
725	LogFlow(("MMR3IncreaseBaseReservation: +%RU64 (%RU64 -> %RU64)\n", cAddBasePages, cOld, pVM->mm.s.cBasePages));
726	int rc = mmR3UpdateReservation(pVM);
727	if (RT_FAILURE(rc))
728	{
729	VMSetError(pVM, rc, RT_SRC_POS, N_("Failed to reserved physical memory for the RAM (%#RX64 -> %#RX64 + %#RX32)"),
730	cOld, pVM->mm.s.cBasePages, pVM->mm.s.cHandyPages);
731	pVM->mm.s.cBasePages = cOld;
732	}
733	return rc;
734	}
735
736
737	/**
738	* Interface for PGM to make reservations for handy pages in addition to the
739	* base memory.
740	*
741	* This can be called before MMR3InitPaging.
742	*
743	* @returns VBox status code. Will set VM error on failure.
744	* @param pVM The cross context VM structure.
745	* @param cHandyPages The number of handy pages.
746	*/
747	VMMR3DECL(int) MMR3ReserveHandyPages(PVM pVM, uint32_t cHandyPages)
748	{
749	AssertReturn(!pVM->mm.s.cHandyPages, VERR_WRONG_ORDER);
750
751	pVM->mm.s.cHandyPages = cHandyPages;
752	LogFlow(("MMR3ReserveHandyPages: %RU32 (base %RU64)\n", pVM->mm.s.cHandyPages, pVM->mm.s.cBasePages));
753	int rc = mmR3UpdateReservation(pVM);
754	if (RT_FAILURE(rc))
755	{
756	VMSetError(pVM, rc, RT_SRC_POS, N_("Failed to reserved physical memory for the RAM (%#RX64 + %#RX32)"),
757	pVM->mm.s.cBasePages, pVM->mm.s.cHandyPages);
758	pVM->mm.s.cHandyPages = 0;
759	}
760	return rc;
761	}
762
763
764	/**
765	* Interface for PGM to adjust the reservation of fixed pages.
766	*
767	* This can be called before MMR3InitPaging.
768	*
769	* @returns VBox status code. Will set VM error on failure.
770	* @param pVM The cross context VM structure.
771	* @param cDeltaFixedPages The number of guest pages to add (positive) or
772	* subtract (negative).
773	* @param pszDesc Some description associated with the reservation.
774	*/
775	VMMR3DECL(int) MMR3AdjustFixedReservation(PVM pVM, int32_t cDeltaFixedPages, const char *pszDesc)
776	{
777	const uint32_t cOld = pVM->mm.s.cFixedPages;
778	pVM->mm.s.cFixedPages += cDeltaFixedPages;
779	LogFlow(("MMR3AdjustFixedReservation: %d (%u -> %u)\n", cDeltaFixedPages, cOld, pVM->mm.s.cFixedPages));
780	int rc = mmR3UpdateReservation(pVM);
781	if (RT_FAILURE(rc))
782	{
783	VMSetError(pVM, rc, RT_SRC_POS, N_("Failed to reserve physical memory (%#x -> %#x; %s)"),
784	cOld, pVM->mm.s.cFixedPages, pszDesc);
785	pVM->mm.s.cFixedPages = cOld;
786	}
787	return rc;
788	}
789
790
791	/**
792	* Interface for PGM to update the reservation of shadow pages.
793	*
794	* This can be called before MMR3InitPaging.
795	*
796	* @returns VBox status code. Will set VM error on failure.
797	* @param pVM The cross context VM structure.
798	* @param cShadowPages The new page count.
799	*/
800	VMMR3DECL(int) MMR3UpdateShadowReservation(PVM pVM, uint32_t cShadowPages)
801	{
802	const uint32_t cOld = pVM->mm.s.cShadowPages;
803	pVM->mm.s.cShadowPages = cShadowPages;
804	LogFlow(("MMR3UpdateShadowReservation: %u -> %u\n", cOld, pVM->mm.s.cShadowPages));
805	int rc = mmR3UpdateReservation(pVM);
806	if (RT_FAILURE(rc))
807	{
808	VMSetError(pVM, rc, RT_SRC_POS, N_("Failed to reserve physical memory for shadow page tables (%#x -> %#x)"), cOld, pVM->mm.s.cShadowPages);
809	pVM->mm.s.cShadowPages = cOld;
810	}
811	return rc;
812	}
813
814
815	/**
816	* Get the size of the base RAM.
817	* This usually means the size of the first contiguous block of physical memory.
818	*
819	* @returns The guest base RAM size.
820	* @param pVM The cross context VM structure.
821	* @thread Any.
822	*
823	* @deprecated
824	*/
825	VMMR3DECL(uint64_t) MMR3PhysGetRamSize(PVM pVM)
826	{
827	return pVM->mm.s.cbRamBase;
828	}
829
830
831	/**
832	* Get the size of RAM below 4GB (starts at address 0x00000000).
833	*
834	* @returns The amount of RAM below 4GB in bytes.
835	* @param pVM The cross context VM structure.
836	* @thread Any.
837	*/
838	VMMR3DECL(uint32_t) MMR3PhysGetRamSizeBelow4GB(PVM pVM)
839	{
840	VM_ASSERT_VALID_EXT_RETURN(pVM, UINT32_MAX);
841	return pVM->mm.s.cbRamBelow4GB;
842	}
843
844
845	/**
846	* Get the size of RAM above 4GB (starts at address 0x000100000000).
847	*
848	* @returns The amount of RAM above 4GB in bytes.
849	* @param pVM The cross context VM structure.
850	* @thread Any.
851	*/
852	VMMR3DECL(uint64_t) MMR3PhysGetRamSizeAbove4GB(PVM pVM)
853	{
854	VM_ASSERT_VALID_EXT_RETURN(pVM, UINT64_MAX);
855	return pVM->mm.s.cbRamAbove4GB;
856	}
857
858
859	/**
860	* Get the size of the RAM hole below 4GB.
861	*
862	* @returns Size in bytes.
863	* @param pVM The cross context VM structure.
864	* @thread Any.
865	*/
866	VMMR3DECL(uint32_t) MMR3PhysGet4GBRamHoleSize(PVM pVM)
867	{
868	VM_ASSERT_VALID_EXT_RETURN(pVM, UINT32_MAX);
869	return pVM->mm.s.cbRamHole;
870	}
871

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source: vbox/trunk/src/VBox/VMM/VMMR3/MM.cpp@ 106476

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