MMHyper.cpp@ 23

Last change on this file since 23 was 23, checked in by vboxsync, 18 years ago
string.h & stdio.h + header cleanups.
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1	/* $Id: MMHyper.cpp 23 2007-01-15 14:08:28Z vboxsync $ */
2	/** @file
3	* MM - Memory Monitor(/Manager) - Hypervisor Memory Area.
4	*/
5
6	/*
7	* Copyright (C) 2006 InnoTek Systemberatung GmbH
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 as published by the Free Software Foundation,
13	* in version 2 as it comes in the "COPYING" file of the VirtualBox OSE
14	* distribution. VirtualBox OSE is distributed in the hope that it will
15	* be useful, but WITHOUT ANY WARRANTY of any kind.
16	*
17	* If you received this file as part of a commercial VirtualBox
18	* distribution, then only the terms of your commercial VirtualBox
19	* license agreement apply instead of the previous paragraph.
20	*/
21
22
23
24
25	/*******************************************************************************
26	* Header Files *
27	*******************************************************************************/
28	#define LOG_GROUP LOG_GROUP_MM_HYPER
29	#include <VBox/pgm.h>
30	#include <VBox/mm.h>
31	#include <VBox/dbgf.h>
32	#include "MMInternal.h"
33	#include <VBox/vm.h>
34	#include <VBox/err.h>
35	#include <VBox/param.h>
36	#include <VBox/log.h>
37	#include <iprt/alloc.h>
38	#include <iprt/assert.h>
39	#include <iprt/string.h>
40
41
42	/*******************************************************************************
43	* Internal Functions *
44	*******************************************************************************/
45	static DECLCALLBACK(bool) mmR3HyperRelocateCallback(PVM pVM, RTGCPTR GCPtrOld, RTGCPTR GCPtrNew, PGMRELOCATECALL enmMode, void *pvUser);
46	static int mmR3HyperMap(PVM pVM, const size_t cb, const char pszDesc, PRTGCPTR pGCPtr, PMMLOOKUPHYPER ppLookup);
47	static int mmR3HyperHeapCreate(PVM pVM, const size_t cb, PMMHYPERHEAP *ppHeap);
48	static int mmR3HyperHeapMap(PVM pVM, PMMHYPERHEAP pHeap, PRTGCPTR ppHeapGC);
49	static DECLCALLBACK(void) mmR3HyperInfoHma(PVM pVM, PCDBGFINFOHLP pHlp, const char *pszArgs);
50
51
52	/**
53	* Initializes the hypvervisor related MM stuff without
54	* calling down to PGM.
55	*
56	* PGM is not initialized at this point, PGM relies on
57	* the heap to initialize.
58	*
59	* @returns VBox status.
60	*/
61	int mmr3HyperInit(PVM pVM)
62	{
63	LogFlow(("mmr3HyperInit:\n"));
64
65	/*
66	* Decide Hypervisor mapping in the guest context
67	* And setup various hypervisor area and heap parameters.
68	*/
69	pVM->mm.s.pvHyperAreaGC = (RTGCPTR)MM_HYPER_AREA_ADDRESS;
70	pVM->mm.s.cbHyperArea = MM_HYPER_AREA_MAX_SIZE;
71	AssertRelease(RT_ALIGN_T(pVM->mm.s.pvHyperAreaGC, 1 << X86_PD_SHIFT, RTGCPTR) == pVM->mm.s.pvHyperAreaGC);
72	Assert(pVM->mm.s.pvHyperAreaGC < 0xff000000);
73
74	uint32_t cbHyperHeap;
75	int rc = CFGMR3QueryU32(CFGMR3GetChild(CFGMR3GetRoot(pVM), "MM"), "cbHyperHeap", &cbHyperHeap);
76	if (rc == VERR_CFGM_NO_PARENT \|\| rc == VERR_CFGM_VALUE_NOT_FOUND)
77	cbHyperHeap = 1280*_1K;
78	else if (VBOX_FAILURE(rc))
79	{
80	LogRel(("MM/cbHyperHeap query -> %Vrc\n", rc));
81	AssertRCReturn(rc, rc);
82	}
83	cbHyperHeap = RT_ALIGN_32(cbHyperHeap, PAGE_SIZE);
84
85	/*
86	* Allocate the hypervisor heap.
87	*
88	* (This must be done before we start adding memory to the
89	* hypervisor static area because lookup records are allocated from it.)
90	*/
91	rc = mmR3HyperHeapCreate(pVM, cbHyperHeap, &pVM->mm.s.pHyperHeapHC);
92	if (VBOX_SUCCESS(rc))
93	{
94	/*
95	* Make a small head fence to fend of accidental sequential access.
96	*/
97	MMR3HyperReserve(pVM, PAGE_SIZE, "fence", NULL);
98
99	/*
100	* Map the VM structure into the hypervisor space.
101	*/
102	rc = MMR3HyperMapHCPhys(pVM, pVM, pVM->HCPhysVM, sizeof(VM), "VM", &pVM->pVMGC);
103	if (VBOX_SUCCESS(rc))
104	{
105	/* Reserve a page for fencing. */
106	MMR3HyperReserve(pVM, PAGE_SIZE, "fence", NULL);
107
108	/*
109	* Map the heap into the hypervisor space.
110	*/
111	rc = mmR3HyperHeapMap(pVM, pVM->mm.s.pHyperHeapHC, &pVM->mm.s.pHyperHeapGC);
112	if (VBOX_SUCCESS(rc))
113	{
114	/*
115	* Register info handlers.
116	*/
117	DBGFR3InfoRegisterInternal(pVM, "hma", "Show the layout of the Hypervisor Memory Area.", mmR3HyperInfoHma);
118
119	LogFlow(("mmr3HyperInit: returns VINF_SUCCESS\n"));
120	return VINF_SUCCESS;
121	}
122	/* Caller will do proper cleanup. */
123	}
124	}
125
126	LogFlow(("mmr3HyperInit: returns %Vrc\n", rc));
127	return rc;
128	}
129
130
131	/**
132	* Finalizes the HMA mapping.
133	*
134	* This is called later during init, most (all) HMA allocations should be done
135	* by the time this function is called.
136	*
137	* @returns VBox status.
138	*/
139	MMR3DECL(int) MMR3HyperInitFinalize(PVM pVM)
140	{
141	LogFlow(("MMR3HyperInitFinalize:\n"));
142
143	/*
144	* Adjust and create the HMA mapping.
145	*/
146	while ((RTINT)pVM->mm.s.offHyperNextStatic + 64*_1K < (RTINT)pVM->mm.s.cbHyperArea - _4M)
147	pVM->mm.s.cbHyperArea -= _4M;
148	int rc = PGMR3MapPT(pVM, pVM->mm.s.pvHyperAreaGC, pVM->mm.s.cbHyperArea,
149	mmR3HyperRelocateCallback, NULL, "Hypervisor Memory Area");
150	if (VBOX_FAILURE(rc))
151	return rc;
152	pVM->mm.s.fPGMInitialized = true;
153
154	/*
155	* Do all the delayed mappings.
156	*/
157	PMMLOOKUPHYPER pLookup = (PMMLOOKUPHYPER)((uintptr_t)pVM->mm.s.pHyperHeapHC + pVM->mm.s.offLookupHyper);
158	for (;;)
159	{
160	RTGCPTR GCPtr = pVM->mm.s.pvHyperAreaGC + pLookup->off;
161	unsigned cPages = pLookup->cb >> PAGE_SHIFT;
162	switch (pLookup->enmType)
163	{
164	case MMLOOKUPHYPERTYPE_LOCKED:
165	rc = mmr3MapLocked(pVM, pLookup->u.Locked.pLockedMem, GCPtr, 0, cPages, 0);
166	break;
167
168	case MMLOOKUPHYPERTYPE_HCPHYS:
169	rc = PGMMap(pVM, GCPtr, pLookup->u.HCPhys.HCPhys, pLookup->cb, 0);
170	break;
171
172	case MMLOOKUPHYPERTYPE_GCPHYS:
173	{
174	const RTGCPHYS GCPhys = pLookup->u.GCPhys.GCPhys;
175	const size_t cb = pLookup->cb;
176	for (unsigned off = 0; off < cb; off += PAGE_SIZE)
177	{
178	RTHCPHYS HCPhys;
179	rc = PGMPhysGCPhys2HCPhys(pVM, GCPhys + off, &HCPhys);
180	if (VBOX_FAILURE(rc))
181	break;
182	rc = PGMMap(pVM, GCPtr + off, HCPhys, PAGE_SIZE, 0);
183	if (VBOX_FAILURE(rc))
184	break;
185	}
186	break;
187	}
188
189	case MMLOOKUPHYPERTYPE_DYNAMIC:
190	/* do nothing here since these are either fences or managed by someone else using PGM. */
191	break;
192
193	default:
194	AssertMsgFailed(("enmType=%d\n", pLookup->enmType));
195	break;
196	}
197
198	if (VBOX_FAILURE(rc))
199	{
200	AssertMsgFailed(("rc=%Vrc cb=%d GCPtr=%VGv enmType=%d pszDesc=%s\n",
201	rc, pLookup->cb, pLookup->enmType, pLookup->pszDesc));
202	return rc;
203	}
204
205	/* next */
206	if (pLookup->offNext == (int32_t)NIL_OFFSET)
207	break;
208	pLookup = (PMMLOOKUPHYPER)((uintptr_t)pLookup + pLookup->offNext);
209	}
210
211	LogFlow(("MMR3HyperInitFinalize: returns VINF_SUCCESS\n"));
212	return VINF_SUCCESS;
213	}
214
215
216	/**
217	* Callback function which will be called when PGM is trying to find
218	* a new location for the mapping.
219	*
220	* The callback is called in two modes, 1) the check mode and 2) the relocate mode.
221	* In 1) the callback should say if it objects to a suggested new location. If it
222	* accepts the new location, it is called again for doing it's relocation.
223	*
224	*
225	* @returns true if the location is ok.
226	* @returns false if another location should be found.
227	* @param pVM The VM handle.
228	* @param GCPtrOld The old virtual address.
229	* @param GCPtrNew The new virtual address.
230	* @param enmMode Used to indicate the callback mode.
231	* @param pvUser User argument. Ignored.
232	* @remark The return value is no a failure indicator, it's an acceptance
233	* indicator. Relocation can not fail!
234	*/
235	static DECLCALLBACK(bool) mmR3HyperRelocateCallback(PVM pVM, RTGCPTR GCPtrOld, RTGCPTR GCPtrNew, PGMRELOCATECALL enmMode, void *pvUser)
236	{
237	switch (enmMode)
238	{
239	/*
240	* Verify location - all locations are good for us.
241	*/
242	case PGMRELOCATECALL_SUGGEST:
243	return true;
244
245	/*
246	* Execute the relocation.
247	*/
248	case PGMRELOCATECALL_RELOCATE:
249	{
250	/*
251	* Accepted!
252	*/
253	AssertMsg(GCPtrOld == pVM->mm.s.pvHyperAreaGC, ("GCPtrOld=%#x pVM->mm.s.pvHyperAreaGC=%#x\n", GCPtrOld, pVM->mm.s.pvHyperAreaGC));
254	Log(("Relocating the hypervisor from %#x to %#x\n", GCPtrOld, GCPtrNew));
255
256	/* relocate our selves and the VM structure. */
257	RTGCINTPTR offDelta = GCPtrNew - GCPtrOld;
258	pVM->pVMGC += offDelta;
259	pVM->mm.s.pvHyperAreaGC += offDelta;
260	pVM->mm.s.pHyperHeapGC += offDelta;
261	pVM->mm.s.pHyperHeapHC->pbHeapGC += offDelta;
262	pVM->mm.s.pHyperHeapHC->pVMGC += pVM->pVMGC;
263
264	/* relocate the rest. */
265	VMR3Relocate(pVM, offDelta);
266	return true;
267	}
268
269	default:
270	AssertMsgFailed(("Invalid relocation mode %d\n", enmMode));
271	}
272
273	return false;
274	}
275
276
277	/**
278	* Maps contiguous HC physical memory into the hypervisor region in the GC.
279	*
280	* @return VBox status code.
281	*
282	* @param pVM VM handle.
283	* @param pvHC Host context address of the memory. Must be page aligned!
284	* @param HCPhys Host context physical address of the memory to be mapped. Must be page aligned!
285	* @param cb Size of the memory. Will be rounded up to nearest page.
286	* @param pszDesc Description.
287	* @param pGCPtr Where to store the GC address.
288	*/
289	MMR3DECL(int) MMR3HyperMapHCPhys(PVM pVM, void pvHC, RTHCPHYS HCPhys, size_t cb, const char pszDesc, PRTGCPTR pGCPtr)
290	{
291	LogFlow(("MMR3HyperMapHCPhys: pvHc=%p HCPhys=%VHp cb=%d pszDesc=%p:{%s} pGCPtr=%p\n", pvHC, HCPhys, (int)cb, pszDesc, pszDesc, pGCPtr));
292
293	/*
294	* Validate input.
295	*/
296	AssertReturn(RT_ALIGN_P(pvHC, PAGE_SIZE) == pvHC, VERR_INVALID_PARAMETER);
297	AssertReturn(RT_ALIGN_T(HCPhys, PAGE_SIZE, RTHCPHYS) == HCPhys, VERR_INVALID_PARAMETER);
298	AssertReturn(pszDesc && *pszDesc, VERR_INVALID_PARAMETER);
299
300	/*
301	* Add the memory to the hypervisor area.
302	*/
303	uint32_t cbAligned = RT_ALIGN_32(cb, PAGE_SIZE);
304	AssertReturn(cbAligned >= cb, VERR_INVALID_PARAMETER);
305	RTGCPTR GCPtr;
306	PMMLOOKUPHYPER pLookup;
307	int rc = mmR3HyperMap(pVM, cbAligned, pszDesc, &GCPtr, &pLookup);
308	if (VBOX_SUCCESS(rc))
309	{
310	pLookup->enmType = MMLOOKUPHYPERTYPE_HCPHYS;
311	pLookup->u.HCPhys.pvHC = pvHC;
312	pLookup->u.HCPhys.HCPhys = HCPhys;
313
314	/*
315	* Update the page table.
316	*/
317	if (pVM->mm.s.fPGMInitialized)
318	rc = PGMMap(pVM, GCPtr, HCPhys, cbAligned, 0);
319	if (VBOX_SUCCESS(rc))
320	*pGCPtr = GCPtr;
321	}
322	return rc;
323	}
324
325
326	/**
327	* Maps contiguous GC physical memory into the hypervisor region in the GC.
328	*
329	* @return VBox status code.
330	*
331	* @param pVM VM handle.
332	* @param GCPhys Guest context physical address of the memory to be mapped. Must be page aligned!
333	* @param cb Size of the memory. Will be rounded up to nearest page.
334	* @param pszDesc Mapping description.
335	* @param pGCPtr Where to store the GC address.
336	*/
337	MMR3DECL(int) MMR3HyperMapGCPhys(PVM pVM, RTGCPHYS GCPhys, size_t cb, const char *pszDesc, PRTGCPTR pGCPtr)
338	{
339	LogFlow(("MMR3HyperMapGCPhys: GCPhys=%VGp cb=%d pszDesc=%p:{%s} pGCPtr=%p\n", GCPhys, (int)cb, pszDesc, pszDesc, pGCPtr));
340
341	/*
342	* Validate input.
343	*/
344	AssertReturn(RT_ALIGN_T(GCPhys, PAGE_SIZE, RTGCPHYS) == GCPhys, VERR_INVALID_PARAMETER);
345	AssertReturn(pszDesc && *pszDesc, VERR_INVALID_PARAMETER);
346
347	/*
348	* Add the memory to the hypervisor area.
349	*/
350	cb = RT_ALIGN_Z(cb, PAGE_SIZE);
351	RTGCPTR GCPtr;
352	PMMLOOKUPHYPER pLookup;
353	int rc = mmR3HyperMap(pVM, cb, pszDesc, &GCPtr, &pLookup);
354	if (VBOX_SUCCESS(rc))
355	{
356	pLookup->enmType = MMLOOKUPHYPERTYPE_GCPHYS;
357	pLookup->u.GCPhys.GCPhys = GCPhys;
358
359	/*
360	* Update the page table.
361	*/
362	for (unsigned off = 0; off < cb; off += PAGE_SIZE)
363	{
364	RTHCPHYS HCPhys;
365	rc = PGMPhysGCPhys2HCPhys(pVM, GCPhys + off, &HCPhys);
366	AssertRC(rc);
367	if (VBOX_FAILURE(rc))
368	{
369	AssertMsgFailed(("rc=%Vrc GCPhys=%VGv off=%#x %s\n", rc, GCPhys, off, pszDesc));
370	break;
371	}
372	if (pVM->mm.s.fPGMInitialized)
373	{
374	rc = PGMMap(pVM, GCPtr + off, HCPhys, PAGE_SIZE, 0);
375	AssertRC(rc);
376	if (VBOX_FAILURE(rc))
377	{
378	AssertMsgFailed(("rc=%Vrc GCPhys=%VGv off=%#x %s\n", rc, GCPhys, off, pszDesc));
379	break;
380	}
381	}
382	}
383
384	if (VBOX_SUCCESS(rc) && pGCPtr)
385	*pGCPtr = GCPtr;
386	}
387	return rc;
388	}
389
390
391	/**
392	* Locks and Maps HC virtual memory into the hypervisor region in the GC.
393	*
394	* @return VBox status code.
395	*
396	* @param pVM VM handle.
397	* @param pvHC Host context address of the memory (may be not page aligned).
398	* @param cb Size of the memory. Will be rounded up to nearest page.
399	* @param fFree Set this if MM is responsible for freeing the memory using SUPPageFree.
400	* @param pszDesc Mapping description.
401	* @param pGCPtr Where to store the GC address corresponding to pvHC.
402	*/
403	MMR3DECL(int) MMR3HyperMapHCRam(PVM pVM, void pvHC, size_t cb, bool fFree, const char pszDesc, PRTGCPTR pGCPtr)
404	{
405	LogFlow(("MMR3HyperMapHCRam: pvHc=%p cb=%d fFree=%d pszDesc=%p:{%s} pGCPtr=%p\n", pvHC, (int)cb, fFree, pszDesc, pszDesc, pGCPtr));
406
407	/*
408	* Validate input.
409	*/
410	if ( !pvHC
411	\|\| cb <= 0
412	\|\| !pszDesc
413	\|\| !*pszDesc)
414	{
415	AssertMsgFailed(("Invalid parameter\n"));
416	return VERR_INVALID_PARAMETER;
417	}
418
419	/*
420	* Page align address and size.
421	*/
422	void pvHCPage = (void )((uintptr_t)pvHC & PAGE_BASE_HC_MASK);
423	cb += (uintptr_t)pvHC & PAGE_OFFSET_MASK;
424	cb = RT_ALIGN_Z(cb, PAGE_SIZE);
425
426	/*
427	* Add the memory to the hypervisor area.
428	*/
429	RTGCPTR GCPtr;
430	PMMLOOKUPHYPER pLookup;
431	int rc = mmR3HyperMap(pVM, cb, pszDesc, &GCPtr, &pLookup);
432	if (VBOX_SUCCESS(rc))
433	{
434	/*
435	* Lock the heap memory and tell PGM about the locked pages.
436	*/
437	PMMLOCKEDMEM pLockedMem;
438	rc = mmr3LockMem(pVM, pvHCPage, cb, fFree ? MM_LOCKED_TYPE_HYPER : MM_LOCKED_TYPE_HYPER_NOFREE, &pLockedMem);
439	if (VBOX_SUCCESS(rc))
440	{
441	/* map the stuff into guest address space. */
442	if (pVM->mm.s.fPGMInitialized)
443	rc = mmr3MapLocked(pVM, pLockedMem, GCPtr, 0, ~(size_t)0, 0);
444	if (VBOX_SUCCESS(rc))
445	{
446	pLookup->enmType = MMLOOKUPHYPERTYPE_LOCKED;
447	pLookup->u.Locked.pvHC = pvHC;
448	pLookup->u.Locked.pLockedMem = pLockedMem;
449
450	/* done. */
451	GCPtr \|= (uintptr_t)pvHC & PAGE_OFFSET_MASK;
452	*pGCPtr = GCPtr;
453	return rc;
454	}
455	/* Don't care about failure clean, we're screwed if this fails anyway. */
456	}
457	}
458
459	return rc;
460	}
461
462
463	/**
464	* Reserves a hypervisor memory area.
465	* Most frequent usage is fence pages and dynamically mappings like the guest PD and PDPTR.
466	*
467	* @return VBox status code.
468	*
469	* @param pVM VM handle.
470	* @param cb Size of the memory. Will be rounded up to nearest page.
471	* @param pszDesc Mapping description.
472	* @param pGCPtr Where to store the assigned GC address. Optional.
473	*/
474	MMR3DECL(int) MMR3HyperReserve(PVM pVM, unsigned cb, const char *pszDesc, PRTGCPTR pGCPtr)
475	{
476	LogFlow(("MMR3HyperMapHCRam: cb=%d pszDesc=%p:{%s} pGCPtr=%p\n", (int)cb, pszDesc, pszDesc, pGCPtr));
477
478	/*
479	* Validate input.
480	*/
481	if ( cb <= 0
482	\|\| !pszDesc
483	\|\| !*pszDesc)
484	{
485	AssertMsgFailed(("Invalid parameter\n"));
486	return VERR_INVALID_PARAMETER;
487	}
488
489	/*
490	* Add the memory to the hypervisor area.
491	*/
492	RTGCPTR GCPtr;
493	PMMLOOKUPHYPER pLookup;
494	int rc = mmR3HyperMap(pVM, cb, pszDesc, &GCPtr, &pLookup);
495	if (VBOX_SUCCESS(rc))
496	{
497	pLookup->enmType = MMLOOKUPHYPERTYPE_DYNAMIC;
498	if (pGCPtr)
499	*pGCPtr = GCPtr;
500	return VINF_SUCCESS;
501	}
502	return rc;
503	}
504
505
506	/**
507	* Adds memory to the hypervisor memory arena.
508	*
509	* @return VBox status code.
510	* @param pVM The VM handle.
511	* @param cb Size of the memory. Will be rounded up to neares page.
512	* @param pszDesc The description of the memory.
513	* @param pGCPtr Where to store the GC address.
514	* @param ppLookup Where to store the pointer to the lookup record.
515	* @remark We assume the threading structure of VBox imposes natural
516	* serialization of most functions, this one included.
517	*/
518	static int mmR3HyperMap(PVM pVM, const size_t cb, const char pszDesc, PRTGCPTR pGCPtr, PMMLOOKUPHYPER ppLookup)
519	{
520	/*
521	* Validate input.
522	*/
523	const uint32_t cbAligned = RT_ALIGN(cb, PAGE_SIZE);
524	AssertReturn(cbAligned >= cb, VERR_INVALID_PARAMETER);
525	if (pVM->mm.s.offHyperNextStatic + cbAligned >= pVM->mm.s.cbHyperArea) /* don't use the last page, it's a fence. */
526	{
527	AssertMsgFailed(("Out of static mapping space in the HMA! offHyperAreaGC=%x cbAligned=%x\n",
528	pVM->mm.s.offHyperNextStatic, cbAligned));
529	return VERR_NO_MEMORY;
530	}
531
532	/*
533	* Allocate lookup record.
534	*/
535	PMMLOOKUPHYPER pLookup;
536	int rc = MMHyperAlloc(pVM, sizeof(pLookup), 1, MM_TAG_MM, (void *)&pLookup);
537	if (VBOX_SUCCESS(rc))
538	{
539	/*
540	* Initialize it and insert it.
541	*/
542	pLookup->offNext = pVM->mm.s.offLookupHyper;
543	pLookup->cb = cbAligned;
544	pLookup->off = pVM->mm.s.offHyperNextStatic;
545	pVM->mm.s.offLookupHyper = (char )pLookup - (char )pVM->mm.s.pHyperHeapHC;
546	if (pLookup->offNext != (int32_t)NIL_OFFSET)
547	pLookup->offNext -= pVM->mm.s.offLookupHyper;
548	pLookup->enmType = MMLOOKUPHYPERTYPE_INVALID;
549	memset(&pLookup->u, 0xff, sizeof(pLookup->u));
550	pLookup->pszDesc = pszDesc;
551
552	/* Mapping. */
553	*pGCPtr = pVM->mm.s.pvHyperAreaGC + pVM->mm.s.offHyperNextStatic;
554	pVM->mm.s.offHyperNextStatic += cbAligned;
555
556	/* Return pointer. */
557	*ppLookup = pLookup;
558	}
559
560	AssertRC(rc);
561	LogFlow(("mmR3HyperMap: returns %Vrc pGCPtr=%VGv\n", rc, pGCPtr));
562	return rc;
563	}
564
565
566	/**
567	* Allocates a new heap.
568	*
569	* @returns VBox status code.
570	* @param pVM The VM handle.
571	* @param cb The size of the new heap.
572	* @param ppHeap Where to store the heap pointer on successful return.
573	*/
574	static int mmR3HyperHeapCreate(PVM pVM, const size_t cb, PMMHYPERHEAP *ppHeap)
575	{
576	/*
577	* Allocate the hypervisor heap.
578	*/
579	const uint32_t cbAligned = RT_ALIGN_Z(cb, PAGE_SIZE);
580	AssertReturn(cbAligned >= cb, VERR_INVALID_PARAMETER);
581	void *pv;
582	int rc = SUPPageAlloc(cbAligned >> PAGE_SHIFT, &pv);
583	if (VBOX_SUCCESS(rc))
584	{
585	/*
586	* Initialize the heap and first free chunk.
587	*/
588	PMMHYPERHEAP pHeap = (PMMHYPERHEAP)pv;
589	pHeap->u32Magic = MMHYPERHEAP_MAGIC;
590	pHeap->pVMHC = pVM;
591	pHeap->pVMGC = pVM->pVMGC;
592	pHeap->pbHeapHC = (uint8_t *)pHeap + MMYPERHEAP_HDR_SIZE;
593	//pHeap->pbHeapGC = 0; // set by mmR3HyperHeapMap()
594	pHeap->cbHeap = cbAligned - MMYPERHEAP_HDR_SIZE;
595	pHeap->cbFree = pHeap->cbHeap - sizeof(MMHYPERCHUNK);
596	//pHeap->offFreeHead = 0;
597	//pHeap->offFreeTail = 0;
598	pHeap->offPageAligned = pHeap->cbHeap;
599	//pHeap->HyperHeapStatTree = 0;
600
601	PMMHYPERCHUNKFREE pFree = (PMMHYPERCHUNKFREE)pHeap->pbHeapHC;
602	pFree->cb = pHeap->cbFree;
603	//pFree->core.offNext = 0;
604	MMHYPERCHUNK_SET_TYPE(&pFree->core, MMHYPERCHUNK_FLAGS_FREE);
605	pFree->core.offHeap = -(int32_t)MMYPERHEAP_HDR_SIZE;
606	//pFree->offNext = 0;
607	//pFree->offPrev = 0;
608
609	STAMR3Register(pVM, &pHeap->cbHeap, STAMTYPE_U32, STAMVISIBILITY_ALWAYS, "/MM/HyperHeap/cbHeap", STAMUNIT_BYTES, "The heap size.");
610	STAMR3Register(pVM, &pHeap->cbFree, STAMTYPE_U32, STAMVISIBILITY_ALWAYS, "/MM/HyperHeap/cbFree", STAMUNIT_BYTES, "The free space.");
611
612	*ppHeap = pHeap;
613	return VINF_SUCCESS;
614	}
615	AssertMsgFailed(("SUPPageAlloc(%d,) -> %Vrc\n", cbAligned >> PAGE_SHIFT, rc));
616
617	*ppHeap = NULL;
618	return rc;
619	}
620
621
622	/**
623	* Allocates a new heap.
624	*/
625	static int mmR3HyperHeapMap(PVM pVM, PMMHYPERHEAP pHeap, PRTGCPTR ppHeapGC)
626	{
627	int rc = MMR3HyperMapHCRam(pVM, pHeap, pHeap->cbHeap + MMYPERHEAP_HDR_SIZE, true, "Heap", ppHeapGC);
628	if (VBOX_SUCCESS(rc))
629	{
630	pHeap->pVMGC = pVM->pVMGC;
631	pHeap->pbHeapGC = *ppHeapGC + MMYPERHEAP_HDR_SIZE;
632	/* Reserve a page for fencing. */
633	MMR3HyperReserve(pVM, PAGE_SIZE, "fence", NULL);
634	}
635	return rc;
636	}
637
638
639	#if 0
640	/**
641	* Destroys a heap.
642	*/
643	static int mmR3HyperHeapDestroy(PVM pVM, PMMHYPERHEAP pHeap)
644	{
645	/* all this is dealt with when unlocking and freeing locked memory. */
646	}
647	#endif
648
649
650	/**
651	* Allocates memory in the Hypervisor (GC VMM) area which never will
652	* be freed and doesn't have any offset based relation to other heap blocks.
653	*
654	* The latter means that two blocks allocated by this API will not have the
655	* same relative position to each other in GC and HC. In short, never use
656	* this API for allocating nodes for an offset based AVL tree!
657	*
658	* The returned memory is of course zeroed.
659	*
660	* @returns VBox status code.
661	* @param pVM The VM to operate on.
662	* @param cb Number of bytes to allocate.
663	* @param uAlignment Required memory alignment in bytes.
664	* Values are 0,8,16,32 and PAGE_SIZE.
665	* 0 -> default alignment, i.e. 8 bytes.
666	* @param enmTag The statistics tag.
667	* @param ppv Where to store the address to the allocated
668	* memory.
669	* @remark This is assumed not to be used at times when serialization is required.
670	*/
671	MMDECL(int) MMR3HyperAllocOnceNoRel(PVM pVM, size_t cb, unsigned uAlignment, MMTAG enmTag, void **ppv)
672	{
673	AssertMsg(cb >= 8, ("Hey! Do you really mean to allocate less than 8 bytes?! cb=%d\n", cb));
674	AssertMsg(cb <= _4M, ("Allocating more than 4MB!? (cb=%#x) HMA limit might need adjusting if you allocate more.\n", cb));
675
676	/*
677	* Choose between allocating a new chunk of HMA memory
678	* and the heap. We will only do BIG allocations from HMA.
679	*/
680	if ( cb < _64K
681	&& ( uAlignment != PAGE_SIZE
682	\|\| cb < 48*_1K))
683	{
684	int rc = MMHyperAlloc(pVM, cb, uAlignment, enmTag, ppv);
685	if ( rc != VERR_MM_HYPER_NO_MEMORY
686	\|\| cb <= 8*_1K)
687	{
688	Log2(("MMR3HyperAllocOnceNoRel: cb=%#x uAlignment=%#x returns %Rrc and *ppv=%p\n",
689	cb, uAlignment, rc, *ppv));
690	return rc;
691	}
692	}
693
694	/*
695	* Validate alignment.
696	*/
697	switch (uAlignment)
698	{
699	case 0:
700	case 8:
701	case 16:
702	case 32:
703	case PAGE_SIZE:
704	break;
705	default:
706	AssertMsgFailed(("Invalid alignment %u\n", uAlignment));
707	return VERR_INVALID_PARAMETER;
708	}
709
710	/*
711	* Allocate the pages and the HMA space.
712	*/
713	cb = RT_ALIGN(cb, PAGE_SIZE);
714	void *pvPages;
715	int rc = SUPPageAlloc(cb >> PAGE_SHIFT, &pvPages);
716	if (VBOX_SUCCESS(rc))
717	{
718	RTGCPTR GCPtr;
719	rc = MMR3HyperMapHCRam(pVM, pvPages, cb, true, mmR3GetTagName(enmTag), &GCPtr);
720	if (VBOX_SUCCESS(rc))
721	{
722	*ppv = pvPages;
723	Log2(("MMR3HyperAllocOnceNoRel: cb=%#x uAlignment=%#x returns VINF_SUCCESS and *ppv=%p\n",
724	cb, uAlignment, *ppv));
725	return rc;
726	}
727	SUPPageFree(pvPages);
728	}
729	if (rc == VERR_NO_MEMORY)
730	rc = VERR_MM_HYPER_NO_MEMORY;
731	Log2(("MMR3HyperAllocOnceNoRel: cb=%#x uAlignment=%#x returns %Rrc\n", cb, uAlignment, rc));
732	AssertMsgFailed(("Failed to allocate %d bytes!\n", cb));
733	return rc;
734	}
735
736
737	/**
738	* Convert hypervisor HC virtual address to HC physical address.
739	*
740	* @returns HC physical address.
741	* @param pVM VM Handle
742	* @param pvHC Host context physical address.
743	*/
744	MMR3DECL(RTHCPHYS) MMR3HyperHCVirt2HCPhys(PVM pVM, void *pvHC)
745	{
746	PMMLOOKUPHYPER pLookup = (PMMLOOKUPHYPER)((char*)pVM->mm.s.pHyperHeapHC + pVM->mm.s.offLookupHyper);
747	for (;;)
748	{
749	switch (pLookup->enmType)
750	{
751	case MMLOOKUPHYPERTYPE_LOCKED:
752	{
753	unsigned off = (char )pvHC - (char )pLookup->u.Locked.pvHC;
754	if (off < pLookup->cb)
755	return (pLookup->u.Locked.pLockedMem->aPhysPages[off >> PAGE_SHIFT].Phys & X86_PTE_PAE_PG_MASK) \| (off & PAGE_OFFSET_MASK);
756	break;
757	}
758
759	case MMLOOKUPHYPERTYPE_HCPHYS:
760	{
761	unsigned off = (char )pvHC - (char )pLookup->u.HCPhys.pvHC;
762	if (off < pLookup->cb)
763	return pLookup->u.HCPhys.HCPhys + off;
764	break;
765	}
766
767	case MMLOOKUPHYPERTYPE_GCPHYS:
768	case MMLOOKUPHYPERTYPE_DYNAMIC:
769	/* can convert these kind of records. */
770	break;
771
772	default:
773	AssertMsgFailed(("enmType=%d\n", pLookup->enmType));
774	break;
775	}
776
777	/* next */
778	if ((unsigned)pLookup->offNext == NIL_OFFSET)
779	break;
780	pLookup = (PMMLOOKUPHYPER)((char *)pLookup + pLookup->offNext);
781	}
782
783	AssertMsgFailed(("pvHC=%p is not inside the hypervisor memory area!\n", pvHC));
784	return NIL_RTHCPHYS;
785	}
786
787
788	#if 0 /* unused, not implemented */
789	/**
790	* Convert hypervisor HC physical address to HC virtual address.
791	*
792	* @returns HC virtual address.
793	* @param pVM VM Handle
794	* @param HCPhys Host context physical address.
795	*/
796	MMR3DECL(void *) MMR3HyperHCPhys2HCVirt(PVM pVM, RTHCPHYS HCPhys)
797	{
798	void *pv;
799	int rc = MMR3HyperHCPhys2HCVirtEx(pVM, HCPhys, &pv);
800	if (VBOX_SUCCESS(rc))
801	return pv;
802	AssertMsgFailed(("Invalid address HCPhys=%x rc=%d\n", HCPhys, rc));
803	return NULL;
804	}
805
806
807	/**
808	* Convert hypervisor HC physical address to HC virtual address.
809	*
810	* @returns VBox status.
811	* @param pVM VM Handle
812	* @param HCPhys Host context physical address.
813	* @param ppv Where to store the HC virtual address.
814	*/
815	MMR3DECL(int) MMR3HyperHCPhys2HCVirtEx(PVM pVM, RTHCPHYS HCPhys, void **ppv)
816	{
817	/*
818	* Linear search.
819	*/
820	/** @todo implement when actually used. */
821	return VERR_INVALID_POINTER;
822	}
823	#endif /* unused, not implemented */
824
825
826	/**
827	* Read hypervisor memory from GC virtual address.
828	*
829	* @returns VBox status.
830	* @param pVM VM handle.
831	* @param pvDst Destination address (HC of course).
832	* @param GCPtr GC virtual address.
833	* @param cb Number of bytes to read.
834	*/
835	MMR3DECL(int) MMR3HyperReadGCVirt(PVM pVM, void *pvDst, RTGCPTR GCPtr, size_t cb)
836	{
837	if (GCPtr - pVM->mm.s.pvHyperAreaGC >= pVM->mm.s.cbHyperArea)
838	return VERR_INVALID_PARAMETER;
839	return PGMR3MapRead(pVM, pvDst, GCPtr, cb);
840	}
841
842
843	/**
844	* Info handler for 'hma', it dumps the list of lookup records for the hypervisor memory area.
845	*
846	* @param pVM The VM handle.
847	* @param pHlp Callback functions for doing output.
848	* @param pszArgs Argument string. Optional and specific to the handler.
849	*/
850	static DECLCALLBACK(void) mmR3HyperInfoHma(PVM pVM, PCDBGFINFOHLP pHlp, const char *pszArgs)
851	{
852	pHlp->pfnPrintf(pHlp, "Hypervisor Memory Area (HMA) Layout: Base %VGv, 0x%08x bytes\n",
853	pVM->mm.s.pvHyperAreaGC, pVM->mm.s.cbHyperArea);
854
855	PMMLOOKUPHYPER pLookup = (PMMLOOKUPHYPER)((char*)pVM->mm.s.pHyperHeapHC + pVM->mm.s.offLookupHyper);
856	for (;;)
857	{
858	switch (pLookup->enmType)
859	{
860	case MMLOOKUPHYPERTYPE_LOCKED:
861	pHlp->pfnPrintf(pHlp, "%VGv-%VGv %VHv LOCKED %-*s %s\n",
862	pLookup->off + pVM->mm.s.pvHyperAreaGC,
863	pLookup->off + pVM->mm.s.pvHyperAreaGC + pLookup->cb,
864	pLookup->u.Locked.pvHC,
865	sizeof(RTHCPTR) * 2,
866	pLookup->u.Locked.pLockedMem->eType == MM_LOCKED_TYPE_HYPER_NOFREE
867	? "nofree" : "autofree",
868	pLookup->pszDesc);
869	break;
870
871	case MMLOOKUPHYPERTYPE_HCPHYS:
872	pHlp->pfnPrintf(pHlp, "%VGv-%VGv %VHv HCPHYS %VHp %s\n",
873	pLookup->off + pVM->mm.s.pvHyperAreaGC,
874	pLookup->off + pVM->mm.s.pvHyperAreaGC + pLookup->cb,
875	pLookup->u.HCPhys.pvHC, pLookup->u.HCPhys.HCPhys,
876	pLookup->pszDesc);
877	break;
878
879	case MMLOOKUPHYPERTYPE_GCPHYS:
880	pHlp->pfnPrintf(pHlp, "%VGv-%VGv %s GCPHYS %VGp%s %s\n",
881	pLookup->off + pVM->mm.s.pvHyperAreaGC,
882	pLookup->off + pVM->mm.s.pvHyperAreaGC + pLookup->cb,
883	sizeof(RTHCPTR) * 2, "",
884	pLookup->u.GCPhys.GCPhys, RT_ABS(sizeof(RTHCPHYS) - sizeof(RTGCPHYS)) * 2, "",
885	pLookup->pszDesc);
886	break;
887
888	case MMLOOKUPHYPERTYPE_DYNAMIC:
889	pHlp->pfnPrintf(pHlp, "%VGv-%VGv %s DYNAMIC %s %s\n",
890	pLookup->off + pVM->mm.s.pvHyperAreaGC,
891	pLookup->off + pVM->mm.s.pvHyperAreaGC + pLookup->cb,
892	sizeof(RTHCPTR) * 2, "",
893	sizeof(RTHCPTR) * 2, "",
894	pLookup->pszDesc);
895	break;
896
897	default:
898	AssertMsgFailed(("enmType=%d\n", pLookup->enmType));
899	break;
900	}
901
902	/* next */
903	if ((unsigned)pLookup->offNext == NIL_OFFSET)
904	break;
905	pLookup = (PMMLOOKUPHYPER)((char *)pLookup + pLookup->offNext);
906	}
907	}
908

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source: vbox/trunk/src/VBox/VMM/MMHyper.cpp@ 23

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