VirtualBox

source: vbox/trunk/src/VBox/VMM/MM.cpp@ 13538

Last change on this file since 13538 was 13144, checked in by vboxsync, 16 years ago

#1865: Implmented the alternative R0 code for darwin (turned out to be all generic new-phys code). Started renaming the read/write functions: PGMPhysReadGCPtr -> PGMPhysSimpleReadGCPtr, PGMPhysWriteGCPtr -> PGMPhysSimpleWriteGCPtr, PGMPhysWriteGCPtrDirty -> PGMPhysSimpleDirtyWriteGCPtr.
  • Property svn:eol-style set to native
  • Property svn:keywords set to Id
File size: 30.4 KB
Line 
1/* $Id: MM.cpp 13144 2008-10-09 22:44:11Z vboxsync $ */
2/** @file
3 * MM - Memory Manager.
4 */
5
6/*
7 * Copyright (C) 2006-2007 Sun Microsystems, Inc.
8 *
9 * This file is part of VirtualBox Open Source Edition (OSE), as
10 * available from http://www.virtualbox.org. This file is free software;
11 * you can redistribute it and/or modify it under the terms of the GNU
12 * General Public License (GPL) as published by the Free Software
13 * Foundation, in version 2 as it comes in the "COPYING" file of the
14 * VirtualBox OSE distribution. VirtualBox OSE is distributed in the
15 * hope that it will be useful, but WITHOUT ANY WARRANTY of any kind.
16 *
17 * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa
18 * Clara, CA 95054 USA or visit http://www.sun.com if you need
19 * additional information or have any questions.
20 */
21
22
23/** @page pg_mm MM - The Memory Manager
24 *
25 * The memory manager is in charge of the following memory:
26 * - Hypervisor Memory Area (HMA) - Address space management.
27 * - Hypervisor Heap - A memory heap that lives in all contexts.
28 * - Tagged ring-3 heap.
29 * - Page pools - Primarily used by PGM for shadow page tables.
30 * - Locked process memory - Guest RAM and other. (reduce/obsolete this)
31 * - Physical guest memory (RAM & ROM) - Moving to PGM. (obsolete this)
32 *
33 * The global memory manager (GMM) is the global counter part / partner of MM.
34 * MM will provide therefore ring-3 callable interfaces for some of the GMM APIs
35 * related to resource tracking (PGM is the user).
36 *
37 * @see grp_mm
38 *
39 *
40 * @section sec_mm_hma Hypervisor Memory Area
41 *
42 * The HMA is used when executing in raw-mode. We borrow, with the help of
43 * PGMMap, some unused space (one or more page directory entries to be precise)
44 * in the guest's virtual memory context. PGM will monitor the guest's virtual
45 * address space for changes and relocate the HMA when required.
46 *
47 * To give some idea what's in the HMA, study the 'info hma' output:
48 * @verbatim
49VBoxDbg> info hma
50Hypervisor Memory Area (HMA) Layout: Base 00000000a0000000, 0x00800000 bytes
5100000000a05cc000-00000000a05cd000 DYNAMIC fence
5200000000a05c4000-00000000a05cc000 DYNAMIC Dynamic mapping
5300000000a05c3000-00000000a05c4000 DYNAMIC fence
5400000000a05b8000-00000000a05c3000 DYNAMIC Paging
5500000000a05b6000-00000000a05b8000 MMIO2 0000000000000000 PCNetShMem
5600000000a0536000-00000000a05b6000 MMIO2 0000000000000000 VGA VRam
5700000000a0523000-00000000a0536000 00002aaab3d0c000 LOCKED autofree alloc once (PDM_DEVICE)
5800000000a0522000-00000000a0523000 DYNAMIC fence
5900000000a051e000-00000000a0522000 00002aaab36f5000 LOCKED autofree VBoxDD2GC.gc
6000000000a051d000-00000000a051e000 DYNAMIC fence
6100000000a04eb000-00000000a051d000 00002aaab36c3000 LOCKED autofree VBoxDDGC.gc
6200000000a04ea000-00000000a04eb000 DYNAMIC fence
6300000000a04e9000-00000000a04ea000 00002aaab36c2000 LOCKED autofree ram range (High ROM Region)
6400000000a04e8000-00000000a04e9000 DYNAMIC fence
6500000000a040e000-00000000a04e8000 00002aaab2e6d000 LOCKED autofree VMMGC.gc
6600000000a0208000-00000000a040e000 00002aaab2c67000 LOCKED autofree alloc once (PATM)
6700000000a01f7000-00000000a0208000 00002aaaab92d000 LOCKED autofree alloc once (SELM)
6800000000a01e7000-00000000a01f7000 00002aaaab5e8000 LOCKED autofree alloc once (SELM)
6900000000a01e6000-00000000a01e7000 DYNAMIC fence
7000000000a01e5000-00000000a01e6000 00002aaaab5e7000 HCPHYS 00000000c363c000 Core Code
7100000000a01e4000-00000000a01e5000 DYNAMIC fence
7200000000a01e3000-00000000a01e4000 00002aaaaab26000 HCPHYS 00000000619cf000 GIP
7300000000a01a2000-00000000a01e3000 00002aaaabf32000 LOCKED autofree alloc once (PGM_PHYS)
7400000000a016b000-00000000a01a2000 00002aaab233f000 LOCKED autofree alloc once (PGM_POOL)
7500000000a016a000-00000000a016b000 DYNAMIC fence
7600000000a0165000-00000000a016a000 DYNAMIC CR3 mapping
7700000000a0164000-00000000a0165000 DYNAMIC fence
7800000000a0024000-00000000a0164000 00002aaab215f000 LOCKED autofree Heap
7900000000a0023000-00000000a0024000 DYNAMIC fence
8000000000a0001000-00000000a0023000 00002aaab1d24000 LOCKED pages VM
8100000000a0000000-00000000a0001000 DYNAMIC fence
82 @endverbatim
83 *
84 *
85 * @section sec_mm_hyperheap Hypervisor Heap
86 *
87 * The heap is accessible from ring-3, ring-0 and the raw-mode context. That
88 * said, it's not necessarily mapped into ring-0 on if that's possible since we
89 * don't wish to waste kernel address space without a good reason.
90 *
91 * Allocations within the heap are always in the same relative position in all
92 * contexts, so, it's possible to use offset based linking. In fact, the heap is
93 * internally using offset based linked lists tracking heap blocks. We use
94 * offset linked AVL trees and lists in a lot of places where share structures
95 * between RC, R3 and R0, so this is a strict requirement of the heap. However
96 * this means that we cannot easily extend the heap since the extension won't
97 * necessarily be in the continuation of the current heap memory in all (or any)
98 * context.
99 *
100 * All allocations are tagged. Per tag allocation statistics will be maintaing
101 * and exposed thru STAM when VBOX_WITH_STATISTICS is defined.
102 *
103 *
104 * @section sec_mm_r3heap Tagged Ring-3 Heap
105 *
106 * The ring-3 heap is a wrapper around the RTMem API adding allocation
107 * statistics and automatic cleanup on VM destruction.
108 *
109 * Per tag allocation statistics will be maintaing and exposed thru STAM when
110 * VBOX_WITH_STATISTICS is defined.
111 *
112 *
113 * @section sec_mm_page Page Pool
114 *
115 * The MM manages a page pool from which other components can allocate locked,
116 * page aligned and page sized memory objects. The pool provides facilities to
117 * convert back and forth between (host) physical and virtual addresses (within
118 * the pool of course). Several specialized interfaces are provided for the most
119 * common alloctions and convertions to save the caller from bothersome casting
120 * and extra parameter passing.
121 *
122 *
123 * @section sec_mm_locked Locked Process Memory
124 *
125 * MM manages the locked process memory. This is used for a bunch of things
126 * (count the LOCKED entries in the'info hma' output found in @ref sec_mm_hma),
127 * but the main consumer of memory is currently for guest RAM. There is an
128 * ongoing rewrite that will move all the guest RAM allocation to PGM and
129 * GMM.
130 *
131 * The locking of memory is something doing in cooperation with the VirtualBox
132 * support driver, SUPDrv (aka. VBoxDrv), thru the support library API,
133 * SUPR3 (aka. SUPLib).
134 *
135 *
136 * @section sec_mm_phys Physical Guest Memory
137 *
138 * MM is currently managing the physical memory for the guest. It relies heavily
139 * on PGM for this. There is an ongoing rewrite that will move this to PGM. (The
140 * rewrite is driven by the need for more flexible guest ram allocation, but
141 * also motivated by the fact that MMPhys is just adding stupid bureaucracy and
142 * that MMR3PhysReserve is a totally weird artifact that must go away.)
143 *
144 */
145
146
147/*******************************************************************************
148* Header Files *
149*******************************************************************************/
150#define LOG_GROUP LOG_GROUP_MM
151#include <VBox/mm.h>
152#include <VBox/pgm.h>
153#include <VBox/cfgm.h>
154#include <VBox/ssm.h>
155#include <VBox/gmm.h>
156#include "MMInternal.h"
157#include <VBox/vm.h>
158#include <VBox/uvm.h>
159#include <VBox/err.h>
160#include <VBox/param.h>
161
162#include <VBox/log.h>
163#include <iprt/alloc.h>
164#include <iprt/assert.h>
165#include <iprt/string.h>
166
167
168/*******************************************************************************
169* Defined Constants And Macros *
170*******************************************************************************/
171/** The current saved state versino of MM. */
172#define MM_SAVED_STATE_VERSION 2
173
174
175/*******************************************************************************
176* Internal Functions *
177*******************************************************************************/
178static DECLCALLBACK(int) mmR3Save(PVM pVM, PSSMHANDLE pSSM);
179static DECLCALLBACK(int) mmR3Load(PVM pVM, PSSMHANDLE pSSM, uint32_t u32Version);
180
181
182
183
184/**
185 * Initializes the MM members of the UVM.
186 *
187 * This is currently only the ring-3 heap.
188 *
189 * @returns VBox status code.
190 * @param pUVM Pointer to the user mode VM structure.
191 */
192VMMR3DECL(int) MMR3InitUVM(PUVM pUVM)
193{
194 /*
195 * Assert sizes and order.
196 */
197 AssertCompile(sizeof(pUVM->mm.s) <= sizeof(pUVM->mm.padding));
198 AssertRelease(sizeof(pUVM->mm.s) <= sizeof(pUVM->mm.padding));
199 Assert(!pUVM->mm.s.pHeap);
200
201 /*
202 * Init the heap.
203 */
204 return mmR3HeapCreateU(pUVM, &pUVM->mm.s.pHeap);
205}
206
207
208/**
209 * Initializes the MM.
210 *
211 * MM is managing the virtual address space (among other things) and
212 * setup the hypvervisor memory area mapping in the VM structure and
213 * the hypvervisor alloc-only-heap. Assuming the current init order
214 * and components the hypvervisor memory area looks like this:
215 * -# VM Structure.
216 * -# Hypervisor alloc only heap (also call Hypervisor memory region).
217 * -# Core code.
218 *
219 * MM determins the virtual address of the hypvervisor memory area by
220 * checking for location at previous run. If that property isn't available
221 * it will choose a default starting location, currently 0xa0000000.
222 *
223 * @returns VBox status code.
224 * @param pVM The VM to operate on.
225 */
226VMMR3DECL(int) MMR3Init(PVM pVM)
227{
228 LogFlow(("MMR3Init\n"));
229
230 /*
231 * Assert alignment, sizes and order.
232 */
233 AssertRelease(!(RT_OFFSETOF(VM, mm.s) & 31));
234 AssertRelease(sizeof(pVM->mm.s) <= sizeof(pVM->mm.padding));
235 AssertMsg(pVM->mm.s.offVM == 0, ("Already initialized!\n"));
236
237 /*
238 * Init the structure.
239 */
240 pVM->mm.s.offVM = RT_OFFSETOF(VM, mm);
241 pVM->mm.s.offLookupHyper = NIL_OFFSET;
242
243 /*
244 * Init the page pool.
245 */
246 int rc = mmR3PagePoolInit(pVM);
247 if (VBOX_SUCCESS(rc))
248 {
249 /*
250 * Init the hypervisor related stuff.
251 */
252 rc = mmR3HyperInit(pVM);
253 if (VBOX_SUCCESS(rc))
254 {
255 /*
256 * Register the saved state data unit.
257 */
258 rc = SSMR3RegisterInternal(pVM, "mm", 1, MM_SAVED_STATE_VERSION, sizeof(uint32_t) * 2,
259 NULL, mmR3Save, NULL,
260 NULL, mmR3Load, NULL);
261 if (VBOX_SUCCESS(rc))
262 return rc;
263
264 /* .... failure .... */
265 }
266 }
267 MMR3Term(pVM);
268 return rc;
269}
270
271
272/**
273 * Initializes the MM parts which depends on PGM being initialized.
274 *
275 * @returns VBox status code.
276 * @param pVM The VM to operate on.
277 * @remark No cleanup necessary since MMR3Term() will be called on failure.
278 */
279VMMR3DECL(int) MMR3InitPaging(PVM pVM)
280{
281 LogFlow(("MMR3InitPaging:\n"));
282
283 /*
284 * Query the CFGM values.
285 */
286 int rc;
287 PCFGMNODE pMMCfg = CFGMR3GetChild(CFGMR3GetRoot(pVM), "MM");
288 if (pMMCfg)
289 {
290 rc = CFGMR3InsertNode(CFGMR3GetRoot(pVM), "MM", &pMMCfg);
291 AssertRCReturn(rc, rc);
292 }
293
294 /** @cfgm{RamPreAlloc, boolean, false}
295 * Indicates whether the base RAM should all be allocated before starting
296 * the VM (default), or if it should be allocated when first written to.
297 */
298 bool fPreAlloc;
299 rc = CFGMR3QueryBool(CFGMR3GetRoot(pVM), "RamPreAlloc", &fPreAlloc);
300 if (rc == VERR_CFGM_VALUE_NOT_FOUND)
301 fPreAlloc = false;
302 else
303 AssertMsgRCReturn(rc, ("Configuration error: Failed to query integer \"RamPreAlloc\", rc=%Vrc.\n", rc), rc);
304
305 /** @cfgm{RamSize, uint64_t, 0, 0, UINT64_MAX}
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=%Vrc.\n", rc), rc);
315
316 cbRam &= X86_PTE_PAE_PG_MASK;
317 pVM->mm.s.cbRamBase = cbRam; /* Warning: don't move this code to MMR3Init without fixing REMR3Init. */
318 Log(("MM: %RU64 bytes of RAM%s\n", cbRam, fPreAlloc ? " (PreAlloc)" : ""));
319
320 /** @cfgm{MM/Policy, string, no overcommitment}
321 * Specifies the policy to use when reserving memory for this VM. The recognized
322 * value is 'no overcommitment' (default). See GMMPOLICY.
323 */
324 GMMOCPOLICY enmPolicy;
325 char sz[64];
326 rc = CFGMR3QueryString(CFGMR3GetRoot(pVM), "Policy", sz, sizeof(sz));
327 if (RT_SUCCESS(rc))
328 {
329 if ( !RTStrICmp(sz, "no_oc")
330 || !RTStrICmp(sz, "no overcommitment"))
331 enmPolicy = GMMOCPOLICY_NO_OC;
332 else
333 return VMSetError(pVM, VERR_INVALID_PARAMETER, RT_SRC_POS, "Unknown \"MM/Policy\" value \"%s\"", sz);
334 }
335 else if (rc == VERR_CFGM_VALUE_NOT_FOUND)
336 enmPolicy = GMMOCPOLICY_NO_OC;
337 else
338 AssertMsgRCReturn(rc, ("Configuration error: Failed to query string \"MM/Policy\", rc=%Vrc.\n", rc), rc);
339
340 /** @cfgm{MM/Priority, string, normal}
341 * Specifies the memory priority of this VM. The priority comes into play when the
342 * system is overcommitted and the VMs needs to be milked for memory. The recognized
343 * values are 'low', 'normal' (default) and 'high'. See GMMPRIORITY.
344 */
345 GMMPRIORITY enmPriority;
346 rc = CFGMR3QueryString(CFGMR3GetRoot(pVM), "Priority", sz, sizeof(sz));
347 if (RT_SUCCESS(rc))
348 {
349 if (!RTStrICmp(sz, "low"))
350 enmPriority = GMMPRIORITY_LOW;
351 else if (!RTStrICmp(sz, "normal"))
352 enmPriority = GMMPRIORITY_NORMAL;
353 else if (!RTStrICmp(sz, "high"))
354 enmPriority = GMMPRIORITY_HIGH;
355 else
356 return VMSetError(pVM, VERR_INVALID_PARAMETER, RT_SRC_POS, "Unknown \"MM/Priority\" value \"%s\"", sz);
357 }
358 else if (rc == VERR_CFGM_VALUE_NOT_FOUND)
359 enmPriority = GMMPRIORITY_NORMAL;
360 else
361 AssertMsgRCReturn(rc, ("Configuration error: Failed to query string \"MM/Priority\", rc=%Vrc.\n", rc), rc);
362
363 /*
364 * Make the initial memory reservation with GMM.
365 */
366 rc = GMMR3InitialReservation(pVM, cbRam >> PAGE_SHIFT, 1, 1, enmPolicy, enmPriority);
367 if (RT_FAILURE(rc))
368 {
369 if (rc == VERR_GMM_MEMORY_RESERVATION_DECLINED)
370 return VMSetError(pVM, rc, RT_SRC_POS,
371 N_("Insufficient free memory to start the VM (cbRam=%#RX64 enmPolicy=%d enmPriority=%d)"),
372 cbRam, enmPolicy, enmPriority);
373 return VMSetError(pVM, rc, RT_SRC_POS, "GMMR3InitialReservation(,%#RX64,0,0,%d,%d)",
374 cbRam >> PAGE_SHIFT, enmPolicy, enmPriority);
375 }
376
377 /*
378 * If RamSize is 0 we're done now.
379 */
380 if (cbRam < PAGE_SIZE)
381 {
382 Log(("MM: No RAM configured\n"));
383 return VINF_SUCCESS;
384 }
385
386 /*
387 * Setup the base ram (PGM).
388 */
389 rc = PGMR3PhysRegisterRam(pVM, 0, cbRam, "Base RAM");
390#ifdef VBOX_WITH_NEW_PHYS_CODE
391 if (RT_SUCCESS(rc) && fPreAlloc)
392 {
393 /** @todo RamPreAlloc should be handled at the very end of the VM creation. (lazy bird) */
394 return VM_SET_ERROR(pVM, VERR_NOT_IMPLEMENTED, "TODO: RamPreAlloc");
395 }
396#else
397 if (RT_SUCCESS(rc))
398 {
399 /*
400 * Allocate the first chunk, as we'll map ROM ranges there.
401 * If requested, allocated the rest too.
402 */
403 RTGCPHYS GCPhys = (RTGCPHYS)0;
404 rc = PGM3PhysGrowRange(pVM, &GCPhys);
405 if (RT_SUCCESS(rc) && fPreAlloc)
406 for (GCPhys = PGM_DYNAMIC_CHUNK_SIZE;
407 GCPhys < cbRam && RT_SUCCESS(rc);
408 GCPhys += PGM_DYNAMIC_CHUNK_SIZE)
409 rc = PGM3PhysGrowRange(pVM, &GCPhys);
410 }
411#endif
412
413 LogFlow(("MMR3InitPaging: returns %Vrc\n", rc));
414 return rc;
415}
416
417
418/**
419 * Terminates the MM.
420 *
421 * Termination means cleaning up and freeing all resources,
422 * the VM it self is at this point powered off or suspended.
423 *
424 * @returns VBox status code.
425 * @param pVM The VM to operate on.
426 */
427VMMR3DECL(int) MMR3Term(PVM pVM)
428{
429 /*
430 * Destroy the page pool. (first as it used the hyper heap)
431 */
432 mmR3PagePoolTerm(pVM);
433
434 /*
435 * Release locked memory.
436 * (Associated record are released by the heap.)
437 */
438 PMMLOCKEDMEM pLockedMem = pVM->mm.s.pLockedMem;
439 while (pLockedMem)
440 {
441 int rc = SUPPageUnlock(pLockedMem->pv);
442 AssertMsgRC(rc, ("SUPPageUnlock(%p) -> rc=%d\n", pLockedMem->pv, rc));
443 switch (pLockedMem->eType)
444 {
445 case MM_LOCKED_TYPE_HYPER:
446 rc = SUPPageFree(pLockedMem->pv, pLockedMem->cb >> PAGE_SHIFT);
447 AssertMsgRC(rc, ("SUPPageFree(%p) -> rc=%d\n", pLockedMem->pv, rc));
448 break;
449 case MM_LOCKED_TYPE_HYPER_NOFREE:
450 case MM_LOCKED_TYPE_HYPER_PAGES:
451 case MM_LOCKED_TYPE_PHYS:
452 /* nothing to do. */
453 break;
454 }
455 /* next */
456 pLockedMem = pLockedMem->pNext;
457 }
458
459 /*
460 * Zero stuff to detect after termination use of the MM interface
461 */
462 pVM->mm.s.offLookupHyper = NIL_OFFSET;
463 pVM->mm.s.pLockedMem = NULL;
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 return VINF_SUCCESS;
470}
471
472
473/**
474 * Terminates the UVM part of MM.
475 *
476 * Termination means cleaning up and freeing all resources,
477 * the VM it self is at this point powered off or suspended.
478 *
479 * @returns VBox status code.
480 * @param pUVM Pointer to the user mode VM structure.
481 */
482VMMR3DECL(void) MMR3TermUVM(PUVM pUVM)
483{
484 /*
485 * Destroy the heap.
486 */
487 mmR3HeapDestroy(pUVM->mm.s.pHeap);
488 pUVM->mm.s.pHeap = NULL;
489}
490
491
492/**
493 * Reset notification.
494 *
495 * MM will reload shadow ROMs into RAM at this point and make
496 * the ROM writable.
497 *
498 * @param pVM The VM handle.
499 */
500VMMR3DECL(void) MMR3Reset(PVM pVM)
501{
502 mmR3PhysRomReset(pVM);
503}
504
505
506/**
507 * Execute state save operation.
508 *
509 * @returns VBox status code.
510 * @param pVM VM Handle.
511 * @param pSSM SSM operation handle.
512 */
513static DECLCALLBACK(int) mmR3Save(PVM pVM, PSSMHANDLE pSSM)
514{
515 LogFlow(("mmR3Save:\n"));
516
517 /* (PGM saves the physical memory.) */
518 SSMR3PutU64(pSSM, pVM->mm.s.cBasePages);
519 return SSMR3PutU64(pSSM, pVM->mm.s.cbRamBase);
520}
521
522
523/**
524 * Execute state load operation.
525 *
526 * @returns VBox status code.
527 * @param pVM VM Handle.
528 * @param pSSM SSM operation handle.
529 * @param u32Version Data layout version.
530 */
531static DECLCALLBACK(int) mmR3Load(PVM pVM, PSSMHANDLE pSSM, uint32_t u32Version)
532{
533 LogFlow(("mmR3Load:\n"));
534
535 /*
536 * Validate version.
537 */
538 if ( SSM_VERSION_MAJOR_CHANGED(u32Version, MM_SAVED_STATE_VERSION)
539 || !u32Version)
540 {
541 AssertMsgFailed(("mmR3Load: Invalid version u32Version=%d!\n", u32Version));
542 return VERR_SSM_UNSUPPORTED_DATA_UNIT_VERSION;
543 }
544
545 /*
546 * Check the cBasePages and cbRamBase values.
547 */
548 int rc;
549 RTUINT cb1;
550
551 /* cBasePages */
552 uint64_t cPages;
553 if (u32Version != 1)
554 rc = SSMR3GetU64(pSSM, &cPages);
555 else
556 {
557 rc = SSMR3GetUInt(pSSM, &cb1);
558 cPages = cb1 >> PAGE_SHIFT;
559 }
560 if (VBOX_FAILURE(rc))
561 return rc;
562 if (cPages != pVM->mm.s.cBasePages)
563 {
564 LogRel(("mmR3Load: Memory configuration has changed. cPages=%#RX64 saved=%#RX64\n", pVM->mm.s.cBasePages, cPages));
565 return VERR_SSM_LOAD_MEMORY_SIZE_MISMATCH;
566 }
567
568 /* cbRamBase */
569 uint64_t cb;
570 if (u32Version != 1)
571 rc = SSMR3GetU64(pSSM, &cb);
572 else
573 {
574 rc = SSMR3GetUInt(pSSM, &cb1);
575 cb = cb1;
576 }
577 if (VBOX_FAILURE(rc))
578 return rc;
579 if (cb != pVM->mm.s.cbRamBase)
580 {
581 LogRel(("mmR3Load: Memory configuration has changed. cbRamBase=%#RX64 save=%#RX64\n", pVM->mm.s.cbRamBase, cb));
582 return VERR_SSM_LOAD_MEMORY_SIZE_MISMATCH;
583 }
584
585 /* (PGM restores the physical memory.) */
586 return rc;
587}
588
589
590/**
591 * Updates GMM with memory reservation changes.
592 *
593 * Called when MM::cbRamRegistered, MM::cShadowPages or MM::cFixedPages changes.
594 *
595 * @returns VBox status code - see GMMR0UpdateReservation.
596 * @param pVM The shared VM structure.
597 */
598int mmR3UpdateReservation(PVM pVM)
599{
600 VM_ASSERT_EMT(pVM);
601 if (pVM->mm.s.fDoneMMR3InitPaging)
602 return GMMR3UpdateReservation(pVM,
603 RT_MAX(pVM->mm.s.cBasePages, 1),
604 RT_MAX(pVM->mm.s.cShadowPages, 1),
605 RT_MAX(pVM->mm.s.cFixedPages, 1));
606 return VINF_SUCCESS;
607}
608
609
610/**
611 * Interface for PGM to increase the reservation of RAM and ROM pages.
612 *
613 * This can be called before MMR3InitPaging.
614 *
615 * @returns VBox status code. Will set VM error on failure.
616 * @param pVM The shared VM structure.
617 * @param cAddBasePages The number of pages to add.
618 */
619VMMR3DECL(int) MMR3IncreaseBaseReservation(PVM pVM, uint64_t cAddBasePages)
620{
621 uint64_t cOld = pVM->mm.s.cBasePages;
622 pVM->mm.s.cBasePages += cAddBasePages;
623 LogFlow(("MMR3IncreaseBaseReservation: +%RU64 (%RU64 -> %RU64\n", cAddBasePages, cOld, pVM->mm.s.cBasePages));
624 int rc = mmR3UpdateReservation(pVM);
625 if (RT_FAILURE(rc))
626 {
627 VMSetError(pVM, rc, RT_SRC_POS, N_("Failed to reserved physical memory for the RAM (%#RX64 -> %#RX64)"), cOld, pVM->mm.s.cBasePages);
628 pVM->mm.s.cBasePages = cOld;
629 }
630 return rc;
631}
632
633
634/**
635 * Interface for PGM to adjust the reservation of fixed pages.
636 *
637 * This can be called before MMR3InitPaging.
638 *
639 * @returns VBox status code. Will set VM error on failure.
640 * @param pVM The shared VM structure.
641 * @param cDeltaFixedPages The number of pages to add (positive) or subtract (negative).
642 * @param pszDesc Some description associated with the reservation.
643 */
644VMMR3DECL(int) MMR3AdjustFixedReservation(PVM pVM, int32_t cDeltaFixedPages, const char *pszDesc)
645{
646 const uint32_t cOld = pVM->mm.s.cFixedPages;
647 pVM->mm.s.cFixedPages += cDeltaFixedPages;
648 LogFlow(("MMR3AdjustFixedReservation: %d (%u -> %u)\n", cDeltaFixedPages, cOld, pVM->mm.s.cFixedPages));
649 int rc = mmR3UpdateReservation(pVM);
650 if (RT_FAILURE(rc))
651 {
652 VMSetError(pVM, rc, RT_SRC_POS, N_("Failed to reserve physical memory (%#x -> %#x; %s)"),
653 cOld, pVM->mm.s.cFixedPages, pszDesc);
654 pVM->mm.s.cFixedPages = cOld;
655 }
656 return rc;
657}
658
659
660/**
661 * Interface for PGM to update the reservation of shadow pages.
662 *
663 * This can be called before MMR3InitPaging.
664 *
665 * @returns VBox status code. Will set VM error on failure.
666 * @param pVM The shared VM structure.
667 * @param cShadowPages The new page count.
668 */
669VMMR3DECL(int) MMR3UpdateShadowReservation(PVM pVM, uint32_t cShadowPages)
670{
671 const uint32_t cOld = pVM->mm.s.cShadowPages;
672 pVM->mm.s.cShadowPages = cShadowPages;
673 LogFlow(("MMR3UpdateShadowReservation: %u -> %u\n", cOld, pVM->mm.s.cShadowPages));
674 int rc = mmR3UpdateReservation(pVM);
675 if (RT_FAILURE(rc))
676 {
677 VMSetError(pVM, rc, RT_SRC_POS, N_("Failed to reserve physical memory for shadow page tables (%#x -> %#x)"), cOld, pVM->mm.s.cShadowPages);
678 pVM->mm.s.cShadowPages = cOld;
679 }
680 return rc;
681}
682
683
684/**
685 * Locks physical memory which backs a virtual memory range (HC) adding
686 * the required records to the pLockedMem list.
687 *
688 * @returns VBox status code.
689 * @param pVM The VM handle.
690 * @param pv Pointer to memory range which shall be locked down.
691 * This pointer is page aligned.
692 * @param cb Size of memory range (in bytes). This size is page aligned.
693 * @param eType Memory type.
694 * @param ppLockedMem Where to store the pointer to the created locked memory record.
695 * This is optional, pass NULL if not used.
696 * @param fSilentFailure Don't raise an error when unsuccessful. Upper layer with deal with it.
697 */
698int mmR3LockMem(PVM pVM, void *pv, size_t cb, MMLOCKEDTYPE eType, PMMLOCKEDMEM *ppLockedMem, bool fSilentFailure)
699{
700 Assert(RT_ALIGN_P(pv, PAGE_SIZE) == pv);
701 Assert(RT_ALIGN_Z(cb, PAGE_SIZE) == cb);
702
703 if (ppLockedMem)
704 *ppLockedMem = NULL;
705
706 /*
707 * Allocate locked mem structure.
708 */
709 unsigned cPages = cb >> PAGE_SHIFT;
710 AssertReturn(cPages == (cb >> PAGE_SHIFT), VERR_OUT_OF_RANGE);
711 PMMLOCKEDMEM pLockedMem = (PMMLOCKEDMEM)MMR3HeapAlloc(pVM, MM_TAG_MM, RT_OFFSETOF(MMLOCKEDMEM, aPhysPages[cPages]));
712 if (!pLockedMem)
713 return VERR_NO_MEMORY;
714 pLockedMem->pv = pv;
715 pLockedMem->cb = cb;
716 pLockedMem->eType = eType;
717 memset(&pLockedMem->u, 0, sizeof(pLockedMem->u));
718
719 /*
720 * Lock the memory.
721 */
722 int rc = SUPPageLock(pv, cPages, &pLockedMem->aPhysPages[0]);
723 if (VBOX_SUCCESS(rc))
724 {
725 /*
726 * Setup the reserved field.
727 */
728 PSUPPAGE pPhysPage = &pLockedMem->aPhysPages[0];
729 for (unsigned c = cPages; c > 0; c--, pPhysPage++)
730 pPhysPage->uReserved = (RTHCUINTPTR)pLockedMem;
731
732 /*
733 * Insert into the list.
734 *
735 * ASSUME no protected needed here as only one thread in the system can possibly
736 * be doing this. No other threads will walk this list either we assume.
737 */
738 pLockedMem->pNext = pVM->mm.s.pLockedMem;
739 pVM->mm.s.pLockedMem = pLockedMem;
740 /* Set return value. */
741 if (ppLockedMem)
742 *ppLockedMem = pLockedMem;
743 }
744 else
745 {
746 AssertMsgFailed(("SUPPageLock failed with rc=%d\n", rc));
747 MMR3HeapFree(pLockedMem);
748 if (!fSilentFailure)
749 rc = VMSetError(pVM, rc, RT_SRC_POS, N_("Failed to lock %d bytes of host memory (out of memory)"), cb);
750 }
751
752 return rc;
753}
754
755
756/**
757 * Maps a part of or an entire locked memory region into the guest context.
758 *
759 * @returns VBox status.
760 * God knows what happens if we fail...
761 * @param pVM VM handle.
762 * @param pLockedMem Locked memory structure.
763 * @param Addr GC Address where to start the mapping.
764 * @param iPage Page number in the locked memory region.
765 * @param cPages Number of pages to map.
766 * @param fFlags See the fFlags argument of PGR3Map().
767 */
768int mmR3MapLocked(PVM pVM, PMMLOCKEDMEM pLockedMem, RTGCPTR Addr, unsigned iPage, size_t cPages, unsigned fFlags)
769{
770 /*
771 * Adjust ~0 argument
772 */
773 if (cPages == ~(size_t)0)
774 cPages = (pLockedMem->cb >> PAGE_SHIFT) - iPage;
775 Assert(cPages != ~0U);
776 /* no incorrect arguments are accepted */
777 Assert(RT_ALIGN_GCPT(Addr, PAGE_SIZE, RTGCPTR) == Addr);
778 AssertMsg(iPage < (pLockedMem->cb >> PAGE_SHIFT), ("never even think about giving me a bad iPage(=%d)\n", iPage));
779 AssertMsg(iPage + cPages <= (pLockedMem->cb >> PAGE_SHIFT), ("never even think about giving me a bad cPages(=%d)\n", cPages));
780
781 /*
782 * Map the the pages.
783 */
784 PSUPPAGE pPhysPage = &pLockedMem->aPhysPages[iPage];
785 while (cPages)
786 {
787 RTHCPHYS HCPhys = pPhysPage->Phys;
788 int rc = PGMMap(pVM, Addr, HCPhys, PAGE_SIZE, fFlags);
789 if (VBOX_FAILURE(rc))
790 {
791 /** @todo how the hell can we do a proper bailout here. */
792 return rc;
793 }
794
795 /* next */
796 cPages--;
797 iPage++;
798 pPhysPage++;
799 Addr += PAGE_SIZE;
800 }
801
802 return VINF_SUCCESS;
803}
804
805
806/**
807 * Convert HC Physical address to HC Virtual address.
808 *
809 * @returns VBox status.
810 * @param pVM VM handle.
811 * @param HCPhys The host context virtual address.
812 * @param ppv Where to store the resulting address.
813 * @thread The Emulation Thread.
814 *
815 * @remarks Avoid whenever possible.
816 * Intended for the debugger facility only.
817 * @todo Rename to indicate the special usage.
818 */
819VMMR3DECL(int) MMR3HCPhys2HCVirt(PVM pVM, RTHCPHYS HCPhys, void **ppv)
820{
821 /*
822 * Try page tables.
823 */
824 int rc = MMPagePhys2PageTry(pVM, HCPhys, ppv);
825 if (VBOX_SUCCESS(rc))
826 return rc;
827
828 /*
829 * Iterate the locked memory - very slow.
830 */
831 uint32_t off = HCPhys & PAGE_OFFSET_MASK;
832 HCPhys &= X86_PTE_PAE_PG_MASK;
833 for (PMMLOCKEDMEM pCur = pVM->mm.s.pLockedMem; pCur; pCur = pCur->pNext)
834 {
835 size_t iPage = pCur->cb >> PAGE_SHIFT;
836 while (iPage-- > 0)
837 if ((pCur->aPhysPages[iPage].Phys & X86_PTE_PAE_PG_MASK) == HCPhys)
838 {
839 *ppv = (char *)pCur->pv + (iPage << PAGE_SHIFT) + off;
840 return VINF_SUCCESS;
841 }
842 }
843 /* give up */
844 return VERR_INVALID_POINTER;
845}
846
847
848/**
849 * Read memory from GC virtual address using the current guest CR3.
850 *
851 * @returns VBox status.
852 * @param pVM VM handle.
853 * @param pvDst Destination address (HC of course).
854 * @param GCPtr GC virtual address.
855 * @param cb Number of bytes to read.
856 *
857 * @remarks Intended for the debugger facility only.
858 * @todo Move to DBGF, it's only selecting which functions to use!
859 */
860VMMR3DECL(int) MMR3ReadGCVirt(PVM pVM, void *pvDst, RTGCPTR GCPtr, size_t cb)
861{
862 if (GCPtr - pVM->mm.s.pvHyperAreaGC < pVM->mm.s.cbHyperArea)
863 return MMR3HyperReadGCVirt(pVM, pvDst, GCPtr, cb);
864 return PGMPhysSimpleReadGCPtr(pVM, pvDst, GCPtr, cb);
865}
866
867
868/**
869 * Write to memory at GC virtual address translated using the current guest CR3.
870 *
871 * @returns VBox status.
872 * @param pVM VM handle.
873 * @param GCPtrDst GC virtual address.
874 * @param pvSrc The source address (HC of course).
875 * @param cb Number of bytes to read.
876 *
877 * @remarks Intended for the debugger facility only.
878 * @todo Move to DBGF, it's only selecting which functions to use!
879 */
880VMMR3DECL(int) MMR3WriteGCVirt(PVM pVM, RTGCPTR GCPtrDst, const void *pvSrc, size_t cb)
881{
882 if (GCPtrDst - pVM->mm.s.pvHyperAreaGC < pVM->mm.s.cbHyperArea)
883 return VERR_ACCESS_DENIED;
884 return PGMPhysSimpleWriteGCPtr(pVM, GCPtrDst, pvSrc, cb);
885}
886
Note: See TracBrowser for help on using the repository browser.

© 2023 Oracle
Contact – Privacy policy – Terms of Use