MMHyper.cpp@ 39078

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1	/* $Id: MMHyper.cpp 39078 2011-10-21 14:18:22Z vboxsync $ */
2	/** @file
3	* MM - Memory Manager - Hypervisor Memory Area.
4	*/
5
6	/*
7	* Copyright (C) 2006-2007 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	/*******************************************************************************
20	* Header Files *
21	*******************************************************************************/
22	#define LOG_GROUP LOG_GROUP_MM_HYPER
23	#include <VBox/vmm/pgm.h>
24	#include <VBox/vmm/mm.h>
25	#include <VBox/vmm/dbgf.h>
26	#include "MMInternal.h"
27	#include <VBox/vmm/vm.h>
28	#include <VBox/err.h>
29	#include <VBox/param.h>
30	#include <VBox/log.h>
31	#include "internal/pgm.h"
32	#include <iprt/alloc.h>
33	#include <iprt/assert.h>
34	#include <iprt/string.h>
35
36
37	/*******************************************************************************
38	* Internal Functions *
39	*******************************************************************************/
40	static DECLCALLBACK(bool) mmR3HyperRelocateCallback(PVM pVM, RTGCPTR GCPtrOld, RTGCPTR GCPtrNew, PGMRELOCATECALL enmMode, void *pvUser);
41	static int mmR3HyperMap(PVM pVM, const size_t cb, const char pszDesc, PRTGCPTR pGCPtr, PMMLOOKUPHYPER ppLookup);
42	static int mmR3HyperHeapCreate(PVM pVM, const size_t cb, PMMHYPERHEAP *ppHeap, PRTR0PTR pR0PtrHeap);
43	static int mmR3HyperHeapMap(PVM pVM, PMMHYPERHEAP pHeap, PRTGCPTR ppHeapGC);
44	static DECLCALLBACK(void) mmR3HyperInfoHma(PVM pVM, PCDBGFINFOHLP pHlp, const char *pszArgs);
45
46
47	/**
48	* Determin the default heap size.
49	*
50	* @returns The heap size in bytes.
51	* @param pVM The VM handle.
52	*/
53	static uint32_t mmR3ComputeHyperHeapSize(PVM pVM)
54	{
55	/*
56	* Gather parameters.
57	*/
58	bool const fHwVirtExtForced = VMMIsHwVirtExtForced(pVM)
59	\|\| pVM->cCpus > 1;
60
61	bool fCanUseLargerHeap;
62	int rc = CFGMR3QueryBoolDef(CFGMR3GetChild(CFGMR3GetRoot(pVM), "MM"), "CanUseLargerHeap", &fCanUseLargerHeap, false);
63	AssertStmt(RT_SUCCESS(rc), fCanUseLargerHeap = false);
64
65	uint64_t cbRam;
66	rc = CFGMR3QueryU64(CFGMR3GetRoot(pVM), "RamSize", &cbRam);
67	AssertStmt(RT_SUCCESS(rc), cbRam = _1G);
68
69	/*
70	* We need to keep saved state compatibility if raw-mode is an option,
71	* so lets filter out that case first.
72	*/
73	if ( !fCanUseLargerHeap
74	&& !fHwVirtExtForced
75	&& cbRam < 16*_1G64)
76	return 1280 * _1K;
77
78	/*
79	* Calculate the heap size.
80	*/
81	uint32_t cbHeap = _1M;
82
83	/* The newer chipset may have more devices attached, putting additional
84	pressure on the heap. */
85	if (fCanUseLargerHeap)
86	cbHeap += _1M;
87
88	/* More CPUs means some extra memory usage. */
89	if (pVM->cCpus > 1)
90	cbHeap += pVM->cCpus * _64K;
91
92	/* Lots of memory means extra memory consumption as well (pool). */
93	if (cbRam > 16*_1G64)
94	cbHeap += _2M; /** @todo figure out extactly how much */
95
96	return RT_ALIGN(cbHeap, _256K);
97	}
98
99
100	/**
101	* Initializes the hypervisor related MM stuff without
102	* calling down to PGM.
103	*
104	* PGM is not initialized at this point, PGM relies on
105	* the heap to initialize.
106	*
107	* @returns VBox status.
108	*/
109	int mmR3HyperInit(PVM pVM)
110	{
111	LogFlow(("mmR3HyperInit:\n"));
112
113	/*
114	* Decide Hypervisor mapping in the guest context
115	* And setup various hypervisor area and heap parameters.
116	*/
117	pVM->mm.s.pvHyperAreaGC = (RTGCPTR)MM_HYPER_AREA_ADDRESS;
118	pVM->mm.s.cbHyperArea = MM_HYPER_AREA_MAX_SIZE;
119	AssertRelease(RT_ALIGN_T(pVM->mm.s.pvHyperAreaGC, 1 << X86_PD_SHIFT, RTGCPTR) == pVM->mm.s.pvHyperAreaGC);
120	Assert(pVM->mm.s.pvHyperAreaGC < 0xff000000);
121
122	/** @todo @bugref{1865}, @bugref{3202}: Change the cbHyperHeap default
123	* depending on whether VT-x/AMD-V is enabled or not! Don't waste
124	* precious kernel space on heap for the PATM.
125	*/
126	PCFGMNODE pMM = CFGMR3GetChild(CFGMR3GetRoot(pVM), "MM");
127	uint32_t cbHyperHeap;
128	int rc = CFGMR3QueryU32Def(pMM, "cbHyperHeap", &cbHyperHeap, mmR3ComputeHyperHeapSize(pVM));
129	AssertLogRelRCReturn(rc, rc);
130
131	cbHyperHeap = RT_ALIGN_32(cbHyperHeap, PAGE_SIZE);
132	LogRel(("MM: cbHyperHeap=%#x (%u)\n", cbHyperHeap, cbHyperHeap));
133
134	/*
135	* Allocate the hypervisor heap.
136	*
137	* (This must be done before we start adding memory to the
138	* hypervisor static area because lookup records are allocated from it.)
139	*/
140	rc = mmR3HyperHeapCreate(pVM, cbHyperHeap, &pVM->mm.s.pHyperHeapR3, &pVM->mm.s.pHyperHeapR0);
141	if (RT_SUCCESS(rc))
142	{
143	/*
144	* Make a small head fence to fend of accidental sequential access.
145	*/
146	MMR3HyperReserve(pVM, PAGE_SIZE, "fence", NULL);
147
148	/*
149	* Map the VM structure into the hypervisor space.
150	*/
151	AssertRelease(pVM->cbSelf == RT_UOFFSETOF(VM, aCpus[pVM->cCpus]));
152	RTGCPTR GCPtr;
153	rc = MMR3HyperMapPages(pVM, pVM, pVM->pVMR0, RT_ALIGN_Z(pVM->cbSelf, PAGE_SIZE) >> PAGE_SHIFT, pVM->paVMPagesR3, "VM", &GCPtr);
154	if (RT_SUCCESS(rc))
155	{
156	pVM->pVMRC = (RTRCPTR)GCPtr;
157	for (VMCPUID i = 0; i < pVM->cCpus; i++)
158	pVM->aCpus[i].pVMRC = pVM->pVMRC;
159
160	/* Reserve a page for fencing. */
161	MMR3HyperReserve(pVM, PAGE_SIZE, "fence", NULL);
162
163	/*
164	* Map the heap into the hypervisor space.
165	*/
166	rc = mmR3HyperHeapMap(pVM, pVM->mm.s.pHyperHeapR3, &GCPtr);
167	if (RT_SUCCESS(rc))
168	{
169	pVM->mm.s.pHyperHeapRC = (RTRCPTR)GCPtr;
170	Assert(pVM->mm.s.pHyperHeapRC == GCPtr);
171
172	/*
173	* Register info handlers.
174	*/
175	DBGFR3InfoRegisterInternal(pVM, "hma", "Show the layout of the Hypervisor Memory Area.", mmR3HyperInfoHma);
176
177	LogFlow(("mmR3HyperInit: returns VINF_SUCCESS\n"));
178	return VINF_SUCCESS;
179	}
180	/* Caller will do proper cleanup. */
181	}
182	}
183
184	LogFlow(("mmR3HyperInit: returns %Rrc\n", rc));
185	return rc;
186	}
187
188
189	/**
190	* Cleans up the hypervisor heap.
191	*
192	* @returns VBox status.
193	*/
194	int mmR3HyperTerm(PVM pVM)
195	{
196	if (pVM->mm.s.pHyperHeapR3)
197	PDMR3CritSectDelete(&pVM->mm.s.pHyperHeapR3->Lock);
198
199	return VINF_SUCCESS;
200	}
201
202
203	/**
204	* Finalizes the HMA mapping.
205	*
206	* This is called later during init, most (all) HMA allocations should be done
207	* by the time this function is called.
208	*
209	* @returns VBox status.
210	*/
211	VMMR3DECL(int) MMR3HyperInitFinalize(PVM pVM)
212	{
213	LogFlow(("MMR3HyperInitFinalize:\n"));
214
215	/*
216	* Initialize the hyper heap critical section.
217	*/
218	int rc = PDMR3CritSectInit(pVM, &pVM->mm.s.pHyperHeapR3->Lock, RT_SRC_POS, "MM-HYPER");
219	AssertRC(rc);
220
221	/*
222	* Adjust and create the HMA mapping.
223	*/
224	while ((RTINT)pVM->mm.s.offHyperNextStatic + 64*_1K < (RTINT)pVM->mm.s.cbHyperArea - _4M)
225	pVM->mm.s.cbHyperArea -= _4M;
226	rc = PGMR3MapPT(pVM, pVM->mm.s.pvHyperAreaGC, pVM->mm.s.cbHyperArea, 0 /fFlags/,
227	mmR3HyperRelocateCallback, NULL, "Hypervisor Memory Area");
228	if (RT_FAILURE(rc))
229	return rc;
230	pVM->mm.s.fPGMInitialized = true;
231
232	/*
233	* Do all the delayed mappings.
234	*/
235	PMMLOOKUPHYPER pLookup = (PMMLOOKUPHYPER)((uintptr_t)pVM->mm.s.pHyperHeapR3 + pVM->mm.s.offLookupHyper);
236	for (;;)
237	{
238	RTGCPTR GCPtr = pVM->mm.s.pvHyperAreaGC + pLookup->off;
239	uint32_t cPages = pLookup->cb >> PAGE_SHIFT;
240	switch (pLookup->enmType)
241	{
242	case MMLOOKUPHYPERTYPE_LOCKED:
243	{
244	PCRTHCPHYS paHCPhysPages = pLookup->u.Locked.paHCPhysPages;
245	for (uint32_t i = 0; i < cPages; i++)
246	{
247	rc = PGMMap(pVM, GCPtr + (i << PAGE_SHIFT), paHCPhysPages[i], PAGE_SIZE, 0);
248	AssertRCReturn(rc, rc);
249	}
250	break;
251	}
252
253	case MMLOOKUPHYPERTYPE_HCPHYS:
254	rc = PGMMap(pVM, GCPtr, pLookup->u.HCPhys.HCPhys, pLookup->cb, 0);
255	break;
256
257	case MMLOOKUPHYPERTYPE_GCPHYS:
258	{
259	const RTGCPHYS GCPhys = pLookup->u.GCPhys.GCPhys;
260	const uint32_t cb = pLookup->cb;
261	for (uint32_t off = 0; off < cb; off += PAGE_SIZE)
262	{
263	RTHCPHYS HCPhys;
264	rc = PGMPhysGCPhys2HCPhys(pVM, GCPhys + off, &HCPhys);
265	if (RT_FAILURE(rc))
266	break;
267	rc = PGMMap(pVM, GCPtr + off, HCPhys, PAGE_SIZE, 0);
268	if (RT_FAILURE(rc))
269	break;
270	}
271	break;
272	}
273
274	case MMLOOKUPHYPERTYPE_MMIO2:
275	{
276	const RTGCPHYS offEnd = pLookup->u.MMIO2.off + pLookup->cb;
277	for (RTGCPHYS offCur = pLookup->u.MMIO2.off; offCur < offEnd; offCur += PAGE_SIZE)
278	{
279	RTHCPHYS HCPhys;
280	rc = PGMR3PhysMMIO2GetHCPhys(pVM, pLookup->u.MMIO2.pDevIns, pLookup->u.MMIO2.iRegion, offCur, &HCPhys);
281	if (RT_FAILURE(rc))
282	break;
283	rc = PGMMap(pVM, GCPtr + (offCur - pLookup->u.MMIO2.off), HCPhys, PAGE_SIZE, 0);
284	if (RT_FAILURE(rc))
285	break;
286	}
287	break;
288	}
289
290	case MMLOOKUPHYPERTYPE_DYNAMIC:
291	/* do nothing here since these are either fences or managed by someone else using PGM. */
292	break;
293
294	default:
295	AssertMsgFailed(("enmType=%d\n", pLookup->enmType));
296	break;
297	}
298
299	if (RT_FAILURE(rc))
300	{
301	AssertMsgFailed(("rc=%Rrc cb=%d off=%#RX32 enmType=%d pszDesc=%s\n",
302	rc, pLookup->cb, pLookup->off, pLookup->enmType, pLookup->pszDesc));
303	return rc;
304	}
305
306	/* next */
307	if (pLookup->offNext == (int32_t)NIL_OFFSET)
308	break;
309	pLookup = (PMMLOOKUPHYPER)((uintptr_t)pLookup + pLookup->offNext);
310	}
311
312	LogFlow(("MMR3HyperInitFinalize: returns VINF_SUCCESS\n"));
313	return VINF_SUCCESS;
314	}
315
316
317	/**
318	* Callback function which will be called when PGM is trying to find a new
319	* location for the mapping.
320	*
321	* The callback is called in two modes, 1) the check mode and 2) the relocate mode.
322	* In 1) the callback should say if it objects to a suggested new location. If it
323	* accepts the new location, it is called again for doing it's relocation.
324	*
325	*
326	* @returns true if the location is ok.
327	* @returns false if another location should be found.
328	* @param pVM The VM handle.
329	* @param GCPtrOld The old virtual address.
330	* @param GCPtrNew The new virtual address.
331	* @param enmMode Used to indicate the callback mode.
332	* @param pvUser User argument. Ignored.
333	* @remark The return value is no a failure indicator, it's an acceptance
334	* indicator. Relocation can not fail!
335	*/
336	static DECLCALLBACK(bool) mmR3HyperRelocateCallback(PVM pVM, RTGCPTR GCPtrOld, RTGCPTR GCPtrNew,
337	PGMRELOCATECALL enmMode, void *pvUser)
338	{
339	NOREF(pvUser);
340	switch (enmMode)
341	{
342	/*
343	* Verify location - all locations are good for us.
344	*/
345	case PGMRELOCATECALL_SUGGEST:
346	return true;
347
348	/*
349	* Execute the relocation.
350	*/
351	case PGMRELOCATECALL_RELOCATE:
352	{
353	/*
354	* Accepted!
355	*/
356	AssertMsg(GCPtrOld == pVM->mm.s.pvHyperAreaGC, ("GCPtrOld=%RGv pVM->mm.s.pvHyperAreaGC=%RGv\n", GCPtrOld, pVM->mm.s.pvHyperAreaGC));
357	Log(("Relocating the hypervisor from %RGv to %RGv\n", GCPtrOld, GCPtrNew));
358
359	/*
360	* Relocate the VM structure and ourselves.
361	*/
362	RTGCINTPTR offDelta = GCPtrNew - GCPtrOld;
363	pVM->pVMRC += offDelta;
364	for (VMCPUID i = 0; i < pVM->cCpus; i++)
365	pVM->aCpus[i].pVMRC = pVM->pVMRC;
366
367	pVM->mm.s.pvHyperAreaGC += offDelta;
368	Assert(pVM->mm.s.pvHyperAreaGC < _4G);
369	pVM->mm.s.pHyperHeapRC += offDelta;
370	pVM->mm.s.pHyperHeapR3->pbHeapRC += offDelta;
371	pVM->mm.s.pHyperHeapR3->pVMRC = pVM->pVMRC;
372
373	/*
374	* Relocate the rest.
375	*/
376	VMR3Relocate(pVM, offDelta);
377	return true;
378	}
379
380	default:
381	AssertMsgFailed(("Invalid relocation mode %d\n", enmMode));
382	}
383
384	return false;
385	}
386
387	/**
388	* Service a VMMCALLRING3_MMHYPER_LOCK call.
389	*
390	* @returns VBox status code.
391	* @param pVM The VM handle.
392	*/
393	VMMR3DECL(int) MMR3LockCall(PVM pVM)
394	{
395	PMMHYPERHEAP pHeap = pVM->mm.s.CTX_SUFF(pHyperHeap);
396
397	int rc = PDMR3CritSectEnterEx(&pHeap->Lock, true /* fHostCall */);
398	AssertRC(rc);
399	return rc;
400	}
401
402	/**
403	* Maps contiguous HC physical memory into the hypervisor region in the GC.
404	*
405	* @return VBox status code.
406	*
407	* @param pVM VM handle.
408	* @param pvR3 Ring-3 address of the memory. Must be page aligned!
409	* @param pvR0 Optional ring-0 address of the memory.
410	* @param HCPhys Host context physical address of the memory to be
411	* mapped. Must be page aligned!
412	* @param cb Size of the memory. Will be rounded up to nearest page.
413	* @param pszDesc Description.
414	* @param pGCPtr Where to store the GC address.
415	*/
416	VMMR3DECL(int) MMR3HyperMapHCPhys(PVM pVM, void pvR3, RTR0PTR pvR0, RTHCPHYS HCPhys, size_t cb, const char pszDesc, PRTGCPTR pGCPtr)
417	{
418	LogFlow(("MMR3HyperMapHCPhys: pvR3=%p pvR0=%p HCPhys=%RHp cb=%d pszDesc=%p:{%s} pGCPtr=%p\n", pvR3, pvR0, HCPhys, (int)cb, pszDesc, pszDesc, pGCPtr));
419
420	/*
421	* Validate input.
422	*/
423	AssertReturn(RT_ALIGN_P(pvR3, PAGE_SIZE) == pvR3, VERR_INVALID_PARAMETER);
424	AssertReturn(RT_ALIGN_T(pvR0, PAGE_SIZE, RTR0PTR) == pvR0, VERR_INVALID_PARAMETER);
425	AssertReturn(RT_ALIGN_T(HCPhys, PAGE_SIZE, RTHCPHYS) == HCPhys, VERR_INVALID_PARAMETER);
426	AssertReturn(pszDesc && *pszDesc, VERR_INVALID_PARAMETER);
427
428	/*
429	* Add the memory to the hypervisor area.
430	*/
431	uint32_t cbAligned = RT_ALIGN_32(cb, PAGE_SIZE);
432	AssertReturn(cbAligned >= cb, VERR_INVALID_PARAMETER);
433	RTGCPTR GCPtr;
434	PMMLOOKUPHYPER pLookup;
435	int rc = mmR3HyperMap(pVM, cbAligned, pszDesc, &GCPtr, &pLookup);
436	if (RT_SUCCESS(rc))
437	{
438	pLookup->enmType = MMLOOKUPHYPERTYPE_HCPHYS;
439	pLookup->u.HCPhys.pvR3 = pvR3;
440	pLookup->u.HCPhys.pvR0 = pvR0;
441	pLookup->u.HCPhys.HCPhys = HCPhys;
442
443	/*
444	* Update the page table.
445	*/
446	if (pVM->mm.s.fPGMInitialized)
447	rc = PGMMap(pVM, GCPtr, HCPhys, cbAligned, 0);
448	if (RT_SUCCESS(rc))
449	*pGCPtr = GCPtr;
450	}
451	return rc;
452	}
453
454
455	/**
456	* Maps contiguous GC physical memory into the hypervisor region in the GC.
457	*
458	* @return VBox status code.
459	*
460	* @param pVM VM handle.
461	* @param GCPhys Guest context physical address of the memory to be mapped. Must be page aligned!
462	* @param cb Size of the memory. Will be rounded up to nearest page.
463	* @param pszDesc Mapping description.
464	* @param pGCPtr Where to store the GC address.
465	*/
466	VMMR3DECL(int) MMR3HyperMapGCPhys(PVM pVM, RTGCPHYS GCPhys, size_t cb, const char *pszDesc, PRTGCPTR pGCPtr)
467	{
468	LogFlow(("MMR3HyperMapGCPhys: GCPhys=%RGp cb=%d pszDesc=%p:{%s} pGCPtr=%p\n", GCPhys, (int)cb, pszDesc, pszDesc, pGCPtr));
469
470	/*
471	* Validate input.
472	*/
473	AssertReturn(RT_ALIGN_T(GCPhys, PAGE_SIZE, RTGCPHYS) == GCPhys, VERR_INVALID_PARAMETER);
474	AssertReturn(pszDesc && *pszDesc, VERR_INVALID_PARAMETER);
475
476	/*
477	* Add the memory to the hypervisor area.
478	*/
479	cb = RT_ALIGN_Z(cb, PAGE_SIZE);
480	RTGCPTR GCPtr;
481	PMMLOOKUPHYPER pLookup;
482	int rc = mmR3HyperMap(pVM, cb, pszDesc, &GCPtr, &pLookup);
483	if (RT_SUCCESS(rc))
484	{
485	pLookup->enmType = MMLOOKUPHYPERTYPE_GCPHYS;
486	pLookup->u.GCPhys.GCPhys = GCPhys;
487
488	/*
489	* Update the page table.
490	*/
491	for (unsigned off = 0; off < cb; off += PAGE_SIZE)
492	{
493	RTHCPHYS HCPhys;
494	rc = PGMPhysGCPhys2HCPhys(pVM, GCPhys + off, &HCPhys);
495	AssertRC(rc);
496	if (RT_FAILURE(rc))
497	{
498	AssertMsgFailed(("rc=%Rrc GCPhys=%RGp off=%#x %s\n", rc, GCPhys, off, pszDesc));
499	break;
500	}
501	if (pVM->mm.s.fPGMInitialized)
502	{
503	rc = PGMMap(pVM, GCPtr + off, HCPhys, PAGE_SIZE, 0);
504	AssertRC(rc);
505	if (RT_FAILURE(rc))
506	{
507	AssertMsgFailed(("rc=%Rrc GCPhys=%RGp off=%#x %s\n", rc, GCPhys, off, pszDesc));
508	break;
509	}
510	}
511	}
512
513	if (RT_SUCCESS(rc) && pGCPtr)
514	*pGCPtr = GCPtr;
515	}
516	return rc;
517	}
518
519
520	/**
521	* Maps a portion of an MMIO2 region into the hypervisor region.
522	*
523	* Callers of this API must never deregister the MMIO2 region before the
524	* VM is powered off. If this becomes a requirement MMR3HyperUnmapMMIO2
525	* API will be needed to perform cleanups.
526	*
527	* @return VBox status code.
528	*
529	* @param pVM Pointer to the shared VM structure.
530	* @param pDevIns The device owning the MMIO2 memory.
531	* @param iRegion The region.
532	* @param off The offset into the region. Will be rounded down to closest page boundary.
533	* @param cb The number of bytes to map. Will be rounded up to the closest page boundary.
534	* @param pszDesc Mapping description.
535	* @param pRCPtr Where to store the RC address.
536	*/
537	VMMR3DECL(int) MMR3HyperMapMMIO2(PVM pVM, PPDMDEVINS pDevIns, uint32_t iRegion, RTGCPHYS off, RTGCPHYS cb,
538	const char *pszDesc, PRTRCPTR pRCPtr)
539	{
540	LogFlow(("MMR3HyperMapMMIO2: pDevIns=%p iRegion=%#x off=%RGp cb=%RGp pszDesc=%p:{%s} pRCPtr=%p\n",
541	pDevIns, iRegion, off, cb, pszDesc, pszDesc, pRCPtr));
542	int rc;
543
544	/*
545	* Validate input.
546	*/
547	AssertReturn(pszDesc && *pszDesc, VERR_INVALID_PARAMETER);
548	AssertReturn(off + cb > off, VERR_INVALID_PARAMETER);
549	uint32_t const offPage = off & PAGE_OFFSET_MASK;
550	off &= ~(RTGCPHYS)PAGE_OFFSET_MASK;
551	cb += offPage;
552	cb = RT_ALIGN_Z(cb, PAGE_SIZE);
553	const RTGCPHYS offEnd = off + cb;
554	AssertReturn(offEnd > off, VERR_INVALID_PARAMETER);
555	for (RTGCPHYS offCur = off; offCur < offEnd; offCur += PAGE_SIZE)
556	{
557	RTHCPHYS HCPhys;
558	rc = PGMR3PhysMMIO2GetHCPhys(pVM, pDevIns, iRegion, offCur, &HCPhys);
559	AssertMsgRCReturn(rc, ("rc=%Rrc - iRegion=%d off=%RGp\n", rc, iRegion, off), rc);
560	}
561
562	/*
563	* Add the memory to the hypervisor area.
564	*/
565	RTGCPTR GCPtr;
566	PMMLOOKUPHYPER pLookup;
567	rc = mmR3HyperMap(pVM, cb, pszDesc, &GCPtr, &pLookup);
568	if (RT_SUCCESS(rc))
569	{
570	pLookup->enmType = MMLOOKUPHYPERTYPE_MMIO2;
571	pLookup->u.MMIO2.pDevIns = pDevIns;
572	pLookup->u.MMIO2.iRegion = iRegion;
573	pLookup->u.MMIO2.off = off;
574
575	/*
576	* Update the page table.
577	*/
578	if (pVM->mm.s.fPGMInitialized)
579	{
580	for (RTGCPHYS offCur = off; offCur < offEnd; offCur += PAGE_SIZE)
581	{
582	RTHCPHYS HCPhys;
583	rc = PGMR3PhysMMIO2GetHCPhys(pVM, pDevIns, iRegion, offCur, &HCPhys);
584	AssertRCReturn(rc, VERR_INTERNAL_ERROR);
585	rc = PGMMap(pVM, GCPtr + (offCur - off), HCPhys, PAGE_SIZE, 0);
586	if (RT_FAILURE(rc))
587	{
588	AssertMsgFailed(("rc=%Rrc offCur=%RGp %s\n", rc, offCur, pszDesc));
589	break;
590	}
591	}
592	}
593
594	if (RT_SUCCESS(rc))
595	{
596	GCPtr \|= offPage;
597	*pRCPtr = GCPtr;
598	AssertLogRelReturn(*pRCPtr == GCPtr, VERR_INTERNAL_ERROR);
599	}
600	}
601	return rc;
602	}
603
604
605	/**
606	* Maps locked R3 virtual memory into the hypervisor region in the GC.
607	*
608	* @return VBox status code.
609	*
610	* @param pVM VM handle.
611	* @param pvR3 The ring-3 address of the memory, must be page aligned.
612	* @param pvR0 The ring-0 address of the memory, must be page aligned. (optional)
613	* @param cPages The number of pages.
614	* @param paPages The page descriptors.
615	* @param pszDesc Mapping description.
616	* @param pGCPtr Where to store the GC address corresponding to pvR3.
617	*/
618	VMMR3DECL(int) MMR3HyperMapPages(PVM pVM, void pvR3, RTR0PTR pvR0, size_t cPages, PCSUPPAGE paPages, const char pszDesc, PRTGCPTR pGCPtr)
619	{
620	LogFlow(("MMR3HyperMapPages: pvR3=%p pvR0=%p cPages=%zu paPages=%p pszDesc=%p:{%s} pGCPtr=%p\n",
621	pvR3, pvR0, cPages, paPages, pszDesc, pszDesc, pGCPtr));
622
623	/*
624	* Validate input.
625	*/
626	AssertPtrReturn(pvR3, VERR_INVALID_POINTER);
627	AssertPtrReturn(paPages, VERR_INVALID_POINTER);
628	AssertReturn(cPages > 0, VERR_PAGE_COUNT_OUT_OF_RANGE);
629	AssertReturn(cPages <= VBOX_MAX_ALLOC_PAGE_COUNT, VERR_PAGE_COUNT_OUT_OF_RANGE);
630	AssertPtrReturn(pszDesc, VERR_INVALID_POINTER);
631	AssertReturn(*pszDesc, VERR_INVALID_PARAMETER);
632	AssertPtrReturn(pGCPtr, VERR_INVALID_PARAMETER);
633
634	/*
635	* Add the memory to the hypervisor area.
636	*/
637	RTGCPTR GCPtr;
638	PMMLOOKUPHYPER pLookup;
639	int rc = mmR3HyperMap(pVM, cPages << PAGE_SHIFT, pszDesc, &GCPtr, &pLookup);
640	if (RT_SUCCESS(rc))
641	{
642	/*
643	* Copy the physical page addresses and tell PGM about them.
644	*/
645	PRTHCPHYS paHCPhysPages = (PRTHCPHYS)MMR3HeapAlloc(pVM, MM_TAG_MM, sizeof(RTHCPHYS) * cPages);
646	if (paHCPhysPages)
647	{
648	for (size_t i = 0; i < cPages; i++)
649	{
650	AssertReleaseMsgReturn(paPages[i].Phys != 0 && paPages[i].Phys != NIL_RTHCPHYS && !(paPages[i].Phys & PAGE_OFFSET_MASK),
651	("i=%#zx Phys=%RHp %s\n", i, paPages[i].Phys, pszDesc),
652	VERR_INTERNAL_ERROR);
653	paHCPhysPages[i] = paPages[i].Phys;
654	}
655
656	if (pVM->mm.s.fPGMInitialized)
657	{
658	for (size_t i = 0; i < cPages; i++)
659	{
660	rc = PGMMap(pVM, GCPtr + (i << PAGE_SHIFT), paHCPhysPages[i], PAGE_SIZE, 0);
661	AssertRCBreak(rc);
662	}
663	}
664	if (RT_SUCCESS(rc))
665	{
666	pLookup->enmType = MMLOOKUPHYPERTYPE_LOCKED;
667	pLookup->u.Locked.pvR3 = pvR3;
668	pLookup->u.Locked.pvR0 = pvR0;
669	pLookup->u.Locked.paHCPhysPages = paHCPhysPages;
670
671	/* done. */
672	*pGCPtr = GCPtr;
673	return rc;
674	}
675	/* Don't care about failure clean, we're screwed if this fails anyway. */
676	}
677	}
678
679	return rc;
680	}
681
682
683	/**
684	* Reserves a hypervisor memory area.
685	* Most frequent usage is fence pages and dynamically mappings like the guest PD and PDPT.
686	*
687	* @return VBox status code.
688	*
689	* @param pVM VM handle.
690	* @param cb Size of the memory. Will be rounded up to nearest page.
691	* @param pszDesc Mapping description.
692	* @param pGCPtr Where to store the assigned GC address. Optional.
693	*/
694	VMMR3DECL(int) MMR3HyperReserve(PVM pVM, unsigned cb, const char *pszDesc, PRTGCPTR pGCPtr)
695	{
696	LogFlow(("MMR3HyperMapHCRam: cb=%d pszDesc=%p:{%s} pGCPtr=%p\n", (int)cb, pszDesc, pszDesc, pGCPtr));
697
698	/*
699	* Validate input.
700	*/
701	if ( cb <= 0
702	\|\| !pszDesc
703	\|\| !*pszDesc)
704	{
705	AssertMsgFailed(("Invalid parameter\n"));
706	return VERR_INVALID_PARAMETER;
707	}
708
709	/*
710	* Add the memory to the hypervisor area.
711	*/
712	RTGCPTR GCPtr;
713	PMMLOOKUPHYPER pLookup;
714	int rc = mmR3HyperMap(pVM, cb, pszDesc, &GCPtr, &pLookup);
715	if (RT_SUCCESS(rc))
716	{
717	pLookup->enmType = MMLOOKUPHYPERTYPE_DYNAMIC;
718	if (pGCPtr)
719	*pGCPtr = GCPtr;
720	return VINF_SUCCESS;
721	}
722	return rc;
723	}
724
725
726	/**
727	* Adds memory to the hypervisor memory arena.
728	*
729	* @return VBox status code.
730	* @param pVM The VM handle.
731	* @param cb Size of the memory. Will be rounded up to nearest page.
732	* @param pszDesc The description of the memory.
733	* @param pGCPtr Where to store the GC address.
734	* @param ppLookup Where to store the pointer to the lookup record.
735	* @remark We assume the threading structure of VBox imposes natural
736	* serialization of most functions, this one included.
737	*/
738	static int mmR3HyperMap(PVM pVM, const size_t cb, const char pszDesc, PRTGCPTR pGCPtr, PMMLOOKUPHYPER ppLookup)
739	{
740	/*
741	* Validate input.
742	*/
743	const uint32_t cbAligned = RT_ALIGN_32(cb, PAGE_SIZE);
744	AssertReturn(cbAligned >= cb, VERR_INVALID_PARAMETER);
745	if (pVM->mm.s.offHyperNextStatic + cbAligned >= pVM->mm.s.cbHyperArea) /* don't use the last page, it's a fence. */
746	{
747	AssertMsgFailed(("Out of static mapping space in the HMA! offHyperAreaGC=%x cbAligned=%x cbHyperArea=%x\n",
748	pVM->mm.s.offHyperNextStatic, cbAligned, pVM->mm.s.cbHyperArea));
749	return VERR_NO_MEMORY;
750	}
751
752	/*
753	* Allocate lookup record.
754	*/
755	PMMLOOKUPHYPER pLookup;
756	int rc = MMHyperAlloc(pVM, sizeof(pLookup), 1, MM_TAG_MM, (void *)&pLookup);
757	if (RT_SUCCESS(rc))
758	{
759	/*
760	* Initialize it and insert it.
761	*/
762	pLookup->offNext = pVM->mm.s.offLookupHyper;
763	pLookup->cb = cbAligned;
764	pLookup->off = pVM->mm.s.offHyperNextStatic;
765	pVM->mm.s.offLookupHyper = (uint8_t )pLookup - (uint8_t )pVM->mm.s.pHyperHeapR3;
766	if (pLookup->offNext != (int32_t)NIL_OFFSET)
767	pLookup->offNext -= pVM->mm.s.offLookupHyper;
768	pLookup->enmType = MMLOOKUPHYPERTYPE_INVALID;
769	memset(&pLookup->u, 0xff, sizeof(pLookup->u));
770	pLookup->pszDesc = pszDesc;
771
772	/* Mapping. */
773	*pGCPtr = pVM->mm.s.pvHyperAreaGC + pVM->mm.s.offHyperNextStatic;
774	pVM->mm.s.offHyperNextStatic += cbAligned;
775
776	/* Return pointer. */
777	*ppLookup = pLookup;
778	}
779
780	AssertRC(rc);
781	LogFlow(("mmR3HyperMap: returns %Rrc pGCPtr=%RGv\n", rc, pGCPtr));
782	return rc;
783	}
784
785
786	/**
787	* Allocates a new heap.
788	*
789	* @returns VBox status code.
790	* @param pVM The VM handle.
791	* @param cb The size of the new heap.
792	* @param ppHeap Where to store the heap pointer on successful return.
793	* @param pR0PtrHeap Where to store the ring-0 address of the heap on
794	* success.
795	*/
796	static int mmR3HyperHeapCreate(PVM pVM, const size_t cb, PMMHYPERHEAP *ppHeap, PRTR0PTR pR0PtrHeap)
797	{
798	/*
799	* Allocate the hypervisor heap.
800	*/
801	const uint32_t cbAligned = RT_ALIGN_32(cb, PAGE_SIZE);
802	AssertReturn(cbAligned >= cb, VERR_INVALID_PARAMETER);
803	uint32_t const cPages = cbAligned >> PAGE_SHIFT;
804	PSUPPAGE paPages = (PSUPPAGE)MMR3HeapAlloc(pVM, MM_TAG_MM, cPages * sizeof(paPages[0]));
805	if (!paPages)
806	return VERR_NO_MEMORY;
807	void *pv;
808	RTR0PTR pvR0 = NIL_RTR0PTR;
809	int rc = SUPR3PageAllocEx(cPages,
810	0 /fFlags/,
811	&pv,
812	#ifdef VBOX_WITH_2X_4GB_ADDR_SPACE
813	VMMIsHwVirtExtForced(pVM) ? &pvR0 : NULL,
814	#else
815	NULL,
816	#endif
817	paPages);
818	if (RT_SUCCESS(rc))
819	{
820	#ifdef VBOX_WITH_2X_4GB_ADDR_SPACE
821	if (!VMMIsHwVirtExtForced(pVM))
822	pvR0 = NIL_RTR0PTR;
823	#else
824	pvR0 = (uintptr_t)pv;
825	#endif
826	memset(pv, 0, cbAligned);
827
828	/*
829	* Initialize the heap and first free chunk.
830	*/
831	PMMHYPERHEAP pHeap = (PMMHYPERHEAP)pv;
832	pHeap->u32Magic = MMHYPERHEAP_MAGIC;
833	pHeap->pbHeapR3 = (uint8_t *)pHeap + MMYPERHEAP_HDR_SIZE;
834	pHeap->pbHeapR0 = pvR0 != NIL_RTR0PTR ? pvR0 + MMYPERHEAP_HDR_SIZE : NIL_RTR0PTR;
835	//pHeap->pbHeapRC = 0; // set by mmR3HyperHeapMap()
836	pHeap->pVMR3 = pVM;
837	pHeap->pVMR0 = pVM->pVMR0;
838	pHeap->pVMRC = pVM->pVMRC;
839	pHeap->cbHeap = cbAligned - MMYPERHEAP_HDR_SIZE;
840	pHeap->cbFree = pHeap->cbHeap - sizeof(MMHYPERCHUNK);
841	//pHeap->offFreeHead = 0;
842	//pHeap->offFreeTail = 0;
843	pHeap->offPageAligned = pHeap->cbHeap;
844	//pHeap->HyperHeapStatTree = 0;
845	pHeap->paPages = paPages;
846
847	PMMHYPERCHUNKFREE pFree = (PMMHYPERCHUNKFREE)pHeap->pbHeapR3;
848	pFree->cb = pHeap->cbFree;
849	//pFree->core.offNext = 0;
850	MMHYPERCHUNK_SET_TYPE(&pFree->core, MMHYPERCHUNK_FLAGS_FREE);
851	pFree->core.offHeap = -(int32_t)MMYPERHEAP_HDR_SIZE;
852	//pFree->offNext = 0;
853	//pFree->offPrev = 0;
854
855	STAMR3Register(pVM, &pHeap->cbHeap, STAMTYPE_U32, STAMVISIBILITY_ALWAYS, "/MM/HyperHeap/cbHeap", STAMUNIT_BYTES, "The heap size.");
856	STAMR3Register(pVM, &pHeap->cbFree, STAMTYPE_U32, STAMVISIBILITY_ALWAYS, "/MM/HyperHeap/cbFree", STAMUNIT_BYTES, "The free space.");
857
858	*ppHeap = pHeap;
859	*pR0PtrHeap = pvR0;
860	return VINF_SUCCESS;
861	}
862	AssertMsgFailed(("SUPR3PageAllocEx(%d,,,,) -> %Rrc\n", cbAligned >> PAGE_SHIFT, rc));
863
864	*ppHeap = NULL;
865	return rc;
866	}
867
868	/**
869	* Allocates a new heap.
870	*/
871	static int mmR3HyperHeapMap(PVM pVM, PMMHYPERHEAP pHeap, PRTGCPTR ppHeapGC)
872	{
873	Assert(RT_ALIGN_Z(pHeap->cbHeap + MMYPERHEAP_HDR_SIZE, PAGE_SIZE) == pHeap->cbHeap + MMYPERHEAP_HDR_SIZE);
874	Assert(pHeap->paPages);
875	int rc = MMR3HyperMapPages(pVM,
876	pHeap,
877	pHeap->pbHeapR0 != NIL_RTR0PTR ? pHeap->pbHeapR0 - MMYPERHEAP_HDR_SIZE : NIL_RTR0PTR,
878	(pHeap->cbHeap + MMYPERHEAP_HDR_SIZE) >> PAGE_SHIFT,
879	pHeap->paPages,
880	"Heap", ppHeapGC);
881	if (RT_SUCCESS(rc))
882	{
883	pHeap->pVMRC = pVM->pVMRC;
884	pHeap->pbHeapRC = *ppHeapGC + MMYPERHEAP_HDR_SIZE;
885	/* Reserve a page for fencing. */
886	MMR3HyperReserve(pVM, PAGE_SIZE, "fence", NULL);
887
888	/* We won't need these any more. */
889	MMR3HeapFree(pHeap->paPages);
890	pHeap->paPages = NULL;
891	}
892	return rc;
893	}
894
895
896	/**
897	* Allocates memory in the Hypervisor (GC VMM) area which never will
898	* be freed and doesn't have any offset based relation to other heap blocks.
899	*
900	* The latter means that two blocks allocated by this API will not have the
901	* same relative position to each other in GC and HC. In short, never use
902	* this API for allocating nodes for an offset based AVL tree!
903	*
904	* The returned memory is of course zeroed.
905	*
906	* @returns VBox status code.
907	* @param pVM The VM to operate on.
908	* @param cb Number of bytes to allocate.
909	* @param uAlignment Required memory alignment in bytes.
910	* Values are 0,8,16,32 and PAGE_SIZE.
911	* 0 -> default alignment, i.e. 8 bytes.
912	* @param enmTag The statistics tag.
913	* @param ppv Where to store the address to the allocated
914	* memory.
915	* @remark This is assumed not to be used at times when serialization is required.
916	*/
917	VMMR3DECL(int) MMR3HyperAllocOnceNoRel(PVM pVM, size_t cb, unsigned uAlignment, MMTAG enmTag, void **ppv)
918	{
919	return MMR3HyperAllocOnceNoRelEx(pVM, cb, uAlignment, enmTag, 0/fFlags/, ppv);
920	}
921
922
923	/**
924	* Allocates memory in the Hypervisor (GC VMM) area which never will
925	* be freed and doesn't have any offset based relation to other heap blocks.
926	*
927	* The latter means that two blocks allocated by this API will not have the
928	* same relative position to each other in GC and HC. In short, never use
929	* this API for allocating nodes for an offset based AVL tree!
930	*
931	* The returned memory is of course zeroed.
932	*
933	* @returns VBox status code.
934	* @param pVM The VM to operate on.
935	* @param cb Number of bytes to allocate.
936	* @param uAlignment Required memory alignment in bytes.
937	* Values are 0,8,16,32 and PAGE_SIZE.
938	* 0 -> default alignment, i.e. 8 bytes.
939	* @param enmTag The statistics tag.
940	* @param fFlags Flags, see MMHYPER_AONR_FLAGS_KERNEL_MAPPING.
941	* @param ppv Where to store the address to the allocated memory.
942	* @remark This is assumed not to be used at times when serialization is required.
943	*/
944	VMMR3DECL(int) MMR3HyperAllocOnceNoRelEx(PVM pVM, size_t cb, unsigned uAlignment, MMTAG enmTag, uint32_t fFlags, void **ppv)
945	{
946	AssertMsg(cb >= 8, ("Hey! Do you really mean to allocate less than 8 bytes?! cb=%d\n", cb));
947	Assert(!(fFlags & ~(MMHYPER_AONR_FLAGS_KERNEL_MAPPING)));
948
949	/*
950	* Choose between allocating a new chunk of HMA memory
951	* and the heap. We will only do BIG allocations from HMA and
952	* only at creation time.
953	*/
954	if ( ( cb < _64K
955	&& ( uAlignment != PAGE_SIZE
956	\|\| cb < 48*_1K)
957	&& !(fFlags & MMHYPER_AONR_FLAGS_KERNEL_MAPPING)
958	)
959	\|\| VMR3GetState(pVM) != VMSTATE_CREATING
960	)
961	{
962	Assert(!(fFlags & MMHYPER_AONR_FLAGS_KERNEL_MAPPING));
963	int rc = MMHyperAlloc(pVM, cb, uAlignment, enmTag, ppv);
964	if ( rc != VERR_MM_HYPER_NO_MEMORY
965	\|\| cb <= 8*_1K)
966	{
967	Log2(("MMR3HyperAllocOnceNoRel: cb=%#zx uAlignment=%#x returns %Rrc and *ppv=%p\n",
968	cb, uAlignment, rc, *ppv));
969	return rc;
970	}
971	}
972
973	#ifdef VBOX_WITH_2X_4GB_ADDR_SPACE
974	/*
975	* Set MMHYPER_AONR_FLAGS_KERNEL_MAPPING if we're in going to execute in ring-0.
976	*/
977	if (VMMIsHwVirtExtForced(pVM))
978	fFlags \|= MMHYPER_AONR_FLAGS_KERNEL_MAPPING;
979	#endif
980
981	/*
982	* Validate alignment.
983	*/
984	switch (uAlignment)
985	{
986	case 0:
987	case 8:
988	case 16:
989	case 32:
990	case PAGE_SIZE:
991	break;
992	default:
993	AssertMsgFailed(("Invalid alignment %u\n", uAlignment));
994	return VERR_INVALID_PARAMETER;
995	}
996
997	/*
998	* Allocate the pages and map them into HMA space.
999	*/
1000	uint32_t const cbAligned = RT_ALIGN_32(cb, PAGE_SIZE);
1001	AssertReturn(cbAligned >= cb, VERR_INVALID_PARAMETER);
1002	uint32_t const cPages = cbAligned >> PAGE_SHIFT;
1003	PSUPPAGE paPages = (PSUPPAGE)RTMemTmpAlloc(cPages * sizeof(paPages[0]));
1004	if (!paPages)
1005	return VERR_NO_TMP_MEMORY;
1006	void *pvPages;
1007	RTR0PTR pvR0 = NIL_RTR0PTR;
1008	int rc = SUPR3PageAllocEx(cPages,
1009	0 /fFlags/,
1010	&pvPages,
1011	fFlags & MMHYPER_AONR_FLAGS_KERNEL_MAPPING ? &pvR0 : NULL,
1012	paPages);
1013	if (RT_SUCCESS(rc))
1014	{
1015	if (!(fFlags & MMHYPER_AONR_FLAGS_KERNEL_MAPPING))
1016	#ifdef VBOX_WITH_2X_4GB_ADDR_SPACE
1017	pvR0 = NIL_RTR0PTR;
1018	#else
1019	pvR0 = (RTR0PTR)pvPages;
1020	#endif
1021
1022	memset(pvPages, 0, cbAligned);
1023
1024	RTGCPTR GCPtr;
1025	rc = MMR3HyperMapPages(pVM,
1026	pvPages,
1027	pvR0,
1028	cPages,
1029	paPages,
1030	MMR3HeapAPrintf(pVM, MM_TAG_MM, "alloc once (%s)", mmGetTagName(enmTag)),
1031	&GCPtr);
1032	if (RT_SUCCESS(rc))
1033	{
1034	*ppv = pvPages;
1035	Log2(("MMR3HyperAllocOnceNoRel: cbAligned=%#x uAlignment=%#x returns VINF_SUCCESS and *ppv=%p\n",
1036	cbAligned, uAlignment, *ppv));
1037	MMR3HyperReserve(pVM, PAGE_SIZE, "fence", NULL);
1038	return rc;
1039	}
1040	AssertMsgFailed(("Failed to allocate %zd bytes! %Rrc\n", cbAligned, rc));
1041	SUPR3PageFreeEx(pvPages, cPages);
1042
1043
1044	/*
1045	* HACK ALERT! Try allocate it off the heap so that we don't freak
1046	* out during vga/vmmdev mmio2 allocation with certain ram sizes.
1047	*/
1048	/** @todo make a proper fix for this so we will never end up in this kind of situation! */
1049	Log(("MMR3HyperAllocOnceNoRel: MMR3HyperMapHCRam failed with rc=%Rrc, try MMHyperAlloc(,%#x,,) instead\n", rc, cb));
1050	int rc2 = MMHyperAlloc(pVM, cb, uAlignment, enmTag, ppv);
1051	if (RT_SUCCESS(rc2))
1052	{
1053	Log2(("MMR3HyperAllocOnceNoRel: cb=%#x uAlignment=%#x returns %Rrc and *ppv=%p\n",
1054	cb, uAlignment, rc, *ppv));
1055	return rc;
1056	}
1057	}
1058	else
1059	AssertMsgFailed(("Failed to allocate %zd bytes! %Rrc\n", cbAligned, rc));
1060
1061	if (rc == VERR_NO_MEMORY)
1062	rc = VERR_MM_HYPER_NO_MEMORY;
1063	LogRel(("MMR3HyperAllocOnceNoRel: cb=%#zx uAlignment=%#x returns %Rrc\n", cb, uAlignment, rc));
1064	return rc;
1065	}
1066
1067
1068	/**
1069	* Lookus up a ring-3 pointer to HMA.
1070	*
1071	* @returns The lookup record on success, NULL on failure.
1072	* @param pVM The VM handle.
1073	* @param pvR3 The ring-3 address to look up.
1074	*/
1075	DECLINLINE(PMMLOOKUPHYPER) mmR3HyperLookupR3(PVM pVM, void *pvR3)
1076	{
1077	PMMLOOKUPHYPER pLookup = (PMMLOOKUPHYPER)((uint8_t *)pVM->mm.s.pHyperHeapR3 + pVM->mm.s.offLookupHyper);
1078	for (;;)
1079	{
1080	switch (pLookup->enmType)
1081	{
1082	case MMLOOKUPHYPERTYPE_LOCKED:
1083	{
1084	unsigned off = (uint8_t )pvR3 - (uint8_t )pLookup->u.Locked.pvR3;
1085	if (off < pLookup->cb)
1086	return pLookup;
1087	break;
1088	}
1089
1090	case MMLOOKUPHYPERTYPE_HCPHYS:
1091	{
1092	unsigned off = (uint8_t )pvR3 - (uint8_t )pLookup->u.HCPhys.pvR3;
1093	if (off < pLookup->cb)
1094	return pLookup;
1095	break;
1096	}
1097
1098	case MMLOOKUPHYPERTYPE_GCPHYS:
1099	case MMLOOKUPHYPERTYPE_MMIO2:
1100	case MMLOOKUPHYPERTYPE_DYNAMIC:
1101	/** @todo ? */
1102	break;
1103
1104	default:
1105	AssertMsgFailed(("enmType=%d\n", pLookup->enmType));
1106	return NULL;
1107	}
1108
1109	/* next */
1110	if ((unsigned)pLookup->offNext == NIL_OFFSET)
1111	return NULL;
1112	pLookup = (PMMLOOKUPHYPER)((uint8_t *)pLookup + pLookup->offNext);
1113	}
1114	}
1115
1116
1117	/**
1118	* Set / unset guard status on one or more hyper heap pages.
1119	*
1120	* @returns VBox status code (first failure).
1121	* @param pVM The VM handle.
1122	* @param pvStart The hyper heap page address. Must be page
1123	* aligned.
1124	* @param cb The number of bytes. Must be page aligned.
1125	* @param fSet Whether to set or unset guard page status.
1126	*/
1127	VMMR3DECL(int) MMR3HyperSetGuard(PVM pVM, void *pvStart, size_t cb, bool fSet)
1128	{
1129	/*
1130	* Validate input.
1131	*/
1132	AssertReturn(!((uintptr_t)pvStart & PAGE_OFFSET_MASK), VERR_INVALID_POINTER);
1133	AssertReturn(!(cb & PAGE_OFFSET_MASK), VERR_INVALID_PARAMETER);
1134	AssertReturn(cb <= UINT32_MAX, VERR_INVALID_PARAMETER);
1135	PMMLOOKUPHYPER pLookup = mmR3HyperLookupR3(pVM, pvStart);
1136	AssertReturn(pLookup, VERR_INVALID_PARAMETER);
1137	AssertReturn(pLookup->enmType == MMLOOKUPHYPERTYPE_LOCKED, VERR_INVALID_PARAMETER);
1138
1139	/*
1140	* Get down to business.
1141	* Note! We quietly ignore errors from the support library since the
1142	* protection stuff isn't possible to implement on all platforms.
1143	*/
1144	uint8_t pbR3 = (uint8_t )pLookup->u.Locked.pvR3;
1145	RTR0PTR R0Ptr = pLookup->u.Locked.pvR0 != (uintptr_t)pLookup->u.Locked.pvR3
1146	? pLookup->u.Locked.pvR0
1147	: NIL_RTR0PTR;
1148	uint32_t off = (uint32_t)((uint8_t *)pvStart - pbR3);
1149	int rc;
1150	if (fSet)
1151	{
1152	rc = PGMMapSetPage(pVM, MMHyperR3ToRC(pVM, pvStart), cb, 0);
1153	SUPR3PageProtect(pbR3, R0Ptr, off, (uint32_t)cb, RTMEM_PROT_NONE);
1154	}
1155	else
1156	{
1157	rc = PGMMapSetPage(pVM, MMHyperR3ToRC(pVM, pvStart), cb, X86_PTE_P \| X86_PTE_A \| X86_PTE_D \| X86_PTE_RW);
1158	SUPR3PageProtect(pbR3, R0Ptr, off, (uint32_t)cb, RTMEM_PROT_READ \| RTMEM_PROT_WRITE);
1159	}
1160	return rc;
1161	}
1162
1163
1164	/**
1165	* Convert hypervisor HC virtual address to HC physical address.
1166	*
1167	* @returns HC physical address.
1168	* @param pVM VM Handle
1169	* @param pvR3 Host context virtual address.
1170	*/
1171	VMMR3DECL(RTHCPHYS) MMR3HyperHCVirt2HCPhys(PVM pVM, void *pvR3)
1172	{
1173	PMMLOOKUPHYPER pLookup = (PMMLOOKUPHYPER)((uint8_t *)pVM->mm.s.pHyperHeapR3 + pVM->mm.s.offLookupHyper);
1174	for (;;)
1175	{
1176	switch (pLookup->enmType)
1177	{
1178	case MMLOOKUPHYPERTYPE_LOCKED:
1179	{
1180	unsigned off = (uint8_t )pvR3 - (uint8_t )pLookup->u.Locked.pvR3;
1181	if (off < pLookup->cb)
1182	return pLookup->u.Locked.paHCPhysPages[off >> PAGE_SHIFT] \| (off & PAGE_OFFSET_MASK);
1183	break;
1184	}
1185
1186	case MMLOOKUPHYPERTYPE_HCPHYS:
1187	{
1188	unsigned off = (uint8_t )pvR3 - (uint8_t )pLookup->u.HCPhys.pvR3;
1189	if (off < pLookup->cb)
1190	return pLookup->u.HCPhys.HCPhys + off;
1191	break;
1192	}
1193
1194	case MMLOOKUPHYPERTYPE_GCPHYS:
1195	case MMLOOKUPHYPERTYPE_MMIO2:
1196	case MMLOOKUPHYPERTYPE_DYNAMIC:
1197	/* can (or don't want to) convert these kind of records. */
1198	break;
1199
1200	default:
1201	AssertMsgFailed(("enmType=%d\n", pLookup->enmType));
1202	break;
1203	}
1204
1205	/* next */
1206	if ((unsigned)pLookup->offNext == NIL_OFFSET)
1207	break;
1208	pLookup = (PMMLOOKUPHYPER)((uint8_t *)pLookup + pLookup->offNext);
1209	}
1210
1211	AssertMsgFailed(("pvR3=%p is not inside the hypervisor memory area!\n", pvR3));
1212	return NIL_RTHCPHYS;
1213	}
1214
1215
1216	/**
1217	* Implements the hcphys-not-found return case of MMR3HyperQueryInfoFromHCPhys.
1218	*
1219	* @returns VINF_SUCCESS, VINF_BUFFER_OVERFLOW.
1220	* @param pVM The VM handle.
1221	* @param HCPhys The host physical address to look for.
1222	* @param pLookup The HMA lookup entry corresponding to HCPhys.
1223	* @param pszWhat Where to return the description.
1224	* @param cbWhat Size of the return buffer.
1225	* @param pcbAlloc Where to return the size of whatever it is.
1226	*/
1227	static int mmR3HyperQueryInfoFromHCPhysFound(PVM pVM, RTHCPHYS HCPhys, PMMLOOKUPHYPER pLookup,
1228	char pszWhat, size_t cbWhat, uint32_t pcbAlloc)
1229	{
1230	NOREF(pVM); NOREF(HCPhys);
1231	*pcbAlloc = pLookup->cb;
1232	int rc = RTStrCopy(pszWhat, cbWhat, pLookup->pszDesc);
1233	return rc == VERR_BUFFER_OVERFLOW ? VINF_BUFFER_OVERFLOW : rc;
1234	}
1235
1236
1237	/**
1238	* Scans the HMA for the physical page and reports back a description if found.
1239	*
1240	* @returns VINF_SUCCESS, VINF_BUFFER_OVERFLOW, VERR_NOT_FOUND.
1241	* @param pVM The VM handle.
1242	* @param HCPhys The host physical address to look for.
1243	* @param pszWhat Where to return the description.
1244	* @param cbWhat Size of the return buffer.
1245	* @param pcbAlloc Where to return the size of whatever it is.
1246	*/
1247	VMMR3_INT_DECL(int) MMR3HyperQueryInfoFromHCPhys(PVM pVM, RTHCPHYS HCPhys, char pszWhat, size_t cbWhat, uint32_t pcbAlloc)
1248	{
1249	RTHCPHYS HCPhysPage = HCPhys & ~(RTHCPHYS)PAGE_OFFSET_MASK;
1250	PMMLOOKUPHYPER pLookup = (PMMLOOKUPHYPER)((uint8_t *)pVM->mm.s.pHyperHeapR3 + pVM->mm.s.offLookupHyper);
1251	for (;;)
1252	{
1253	switch (pLookup->enmType)
1254	{
1255	case MMLOOKUPHYPERTYPE_LOCKED:
1256	{
1257	uint32_t i = pLookup->cb >> PAGE_SHIFT;
1258	while (i-- > 0)
1259	if (pLookup->u.Locked.paHCPhysPages[i] == HCPhysPage)
1260	return mmR3HyperQueryInfoFromHCPhysFound(pVM, HCPhys, pLookup, pszWhat, cbWhat, pcbAlloc);
1261	break;
1262	}
1263
1264	case MMLOOKUPHYPERTYPE_HCPHYS:
1265	{
1266	if (pLookup->u.HCPhys.HCPhys - HCPhysPage < pLookup->cb)
1267	return mmR3HyperQueryInfoFromHCPhysFound(pVM, HCPhys, pLookup, pszWhat, cbWhat, pcbAlloc);
1268	break;
1269	}
1270
1271	case MMLOOKUPHYPERTYPE_MMIO2:
1272	case MMLOOKUPHYPERTYPE_GCPHYS:
1273	case MMLOOKUPHYPERTYPE_DYNAMIC:
1274	{
1275	/* brute force. */
1276	uint32_t i = pLookup->cb >> PAGE_SHIFT;
1277	while (i-- > 0)
1278	{
1279	RTGCPTR GCPtr = pLookup->off + pVM->mm.s.pvHyperAreaGC;
1280	RTHCPHYS HCPhysCur;
1281	int rc = PGMMapGetPage(pVM, GCPtr, NULL, &HCPhysCur);
1282	if (RT_SUCCESS(rc) && HCPhysCur == HCPhysPage)
1283	return mmR3HyperQueryInfoFromHCPhysFound(pVM, HCPhys, pLookup, pszWhat, cbWhat, pcbAlloc);
1284	}
1285	break;
1286	}
1287	default:
1288	AssertMsgFailed(("enmType=%d\n", pLookup->enmType));
1289	break;
1290	}
1291
1292	/* next */
1293	if ((unsigned)pLookup->offNext == NIL_OFFSET)
1294	break;
1295	pLookup = (PMMLOOKUPHYPER)((uint8_t *)pLookup + pLookup->offNext);
1296	}
1297	return VERR_NOT_FOUND;
1298	}
1299
1300
1301	#if 0 /* unused, not implemented */
1302	/**
1303	* Convert hypervisor HC physical address to HC virtual address.
1304	*
1305	* @returns HC virtual address.
1306	* @param pVM VM Handle
1307	* @param HCPhys Host context physical address.
1308	*/
1309	VMMR3DECL(void *) MMR3HyperHCPhys2HCVirt(PVM pVM, RTHCPHYS HCPhys)
1310	{
1311	void *pv;
1312	int rc = MMR3HyperHCPhys2HCVirtEx(pVM, HCPhys, &pv);
1313	if (RT_SUCCESS(rc))
1314	return pv;
1315	AssertMsgFailed(("Invalid address HCPhys=%x rc=%d\n", HCPhys, rc));
1316	return NULL;
1317	}
1318
1319
1320	/**
1321	* Convert hypervisor HC physical address to HC virtual address.
1322	*
1323	* @returns VBox status.
1324	* @param pVM VM Handle
1325	* @param HCPhys Host context physical address.
1326	* @param ppv Where to store the HC virtual address.
1327	*/
1328	VMMR3DECL(int) MMR3HyperHCPhys2HCVirtEx(PVM pVM, RTHCPHYS HCPhys, void **ppv)
1329	{
1330	/*
1331	* Linear search.
1332	*/
1333	/** @todo implement when actually used. */
1334	return VERR_INVALID_POINTER;
1335	}
1336	#endif /* unused, not implemented */
1337
1338
1339	/**
1340	* Read hypervisor memory from GC virtual address.
1341	*
1342	* @returns VBox status.
1343	* @param pVM VM handle.
1344	* @param pvDst Destination address (HC of course).
1345	* @param GCPtr GC virtual address.
1346	* @param cb Number of bytes to read.
1347	*
1348	* @remarks For DBGF only.
1349	*/
1350	VMMR3DECL(int) MMR3HyperReadGCVirt(PVM pVM, void *pvDst, RTGCPTR GCPtr, size_t cb)
1351	{
1352	if (GCPtr - pVM->mm.s.pvHyperAreaGC >= pVM->mm.s.cbHyperArea)
1353	return VERR_INVALID_POINTER;
1354	return PGMR3MapRead(pVM, pvDst, GCPtr, cb);
1355	}
1356
1357
1358	/**
1359	* Info handler for 'hma', it dumps the list of lookup records for the hypervisor memory area.
1360	*
1361	* @param pVM The VM handle.
1362	* @param pHlp Callback functions for doing output.
1363	* @param pszArgs Argument string. Optional and specific to the handler.
1364	*/
1365	static DECLCALLBACK(void) mmR3HyperInfoHma(PVM pVM, PCDBGFINFOHLP pHlp, const char *pszArgs)
1366	{
1367	NOREF(pszArgs);
1368
1369	pHlp->pfnPrintf(pHlp, "Hypervisor Memory Area (HMA) Layout: Base %RGv, 0x%08x bytes\n",
1370	pVM->mm.s.pvHyperAreaGC, pVM->mm.s.cbHyperArea);
1371
1372	PMMLOOKUPHYPER pLookup = (PMMLOOKUPHYPER)((uint8_t *)pVM->mm.s.pHyperHeapR3 + pVM->mm.s.offLookupHyper);
1373	for (;;)
1374	{
1375	switch (pLookup->enmType)
1376	{
1377	case MMLOOKUPHYPERTYPE_LOCKED:
1378	pHlp->pfnPrintf(pHlp, "%RGv-%RGv %RHv %RHv LOCKED %-*s %s\n",
1379	pLookup->off + pVM->mm.s.pvHyperAreaGC,
1380	pLookup->off + pVM->mm.s.pvHyperAreaGC + pLookup->cb,
1381	pLookup->u.Locked.pvR3,
1382	pLookup->u.Locked.pvR0,
1383	sizeof(RTHCPTR) * 2, "",
1384	pLookup->pszDesc);
1385	break;
1386
1387	case MMLOOKUPHYPERTYPE_HCPHYS:
1388	pHlp->pfnPrintf(pHlp, "%RGv-%RGv %RHv %RHv HCPHYS %RHp %s\n",
1389	pLookup->off + pVM->mm.s.pvHyperAreaGC,
1390	pLookup->off + pVM->mm.s.pvHyperAreaGC + pLookup->cb,
1391	pLookup->u.HCPhys.pvR3,
1392	pLookup->u.HCPhys.pvR0,
1393	pLookup->u.HCPhys.HCPhys,
1394	pLookup->pszDesc);
1395	break;
1396
1397	case MMLOOKUPHYPERTYPE_GCPHYS:
1398	pHlp->pfnPrintf(pHlp, "%RGv-%RGv %s GCPHYS %RGp%s %s\n",
1399	pLookup->off + pVM->mm.s.pvHyperAreaGC,
1400	pLookup->off + pVM->mm.s.pvHyperAreaGC + pLookup->cb,
1401	sizeof(RTHCPTR) * 2 * 2 + 1, "",
1402	pLookup->u.GCPhys.GCPhys, RT_ABS((int)(sizeof(RTHCPHYS) - sizeof(RTGCPHYS))) * 2, "",
1403	pLookup->pszDesc);
1404	break;
1405
1406	case MMLOOKUPHYPERTYPE_MMIO2:
1407	pHlp->pfnPrintf(pHlp, "%RGv-%RGv %s MMIO2 %RGp%s %s\n",
1408	pLookup->off + pVM->mm.s.pvHyperAreaGC,
1409	pLookup->off + pVM->mm.s.pvHyperAreaGC + pLookup->cb,
1410	sizeof(RTHCPTR) * 2 * 2 + 1, "",
1411	pLookup->u.MMIO2.off, RT_ABS((int)(sizeof(RTHCPHYS) - sizeof(RTGCPHYS))) * 2, "",
1412	pLookup->pszDesc);
1413	break;
1414
1415	case MMLOOKUPHYPERTYPE_DYNAMIC:
1416	pHlp->pfnPrintf(pHlp, "%RGv-%RGv %s DYNAMIC %s %s\n",
1417	pLookup->off + pVM->mm.s.pvHyperAreaGC,
1418	pLookup->off + pVM->mm.s.pvHyperAreaGC + pLookup->cb,
1419	sizeof(RTHCPTR) * 2 * 2 + 1, "",
1420	sizeof(RTHCPTR) * 2, "",
1421	pLookup->pszDesc);
1422	break;
1423
1424	default:
1425	AssertMsgFailed(("enmType=%d\n", pLookup->enmType));
1426	break;
1427	}
1428
1429	/* next */
1430	if ((unsigned)pLookup->offNext == NIL_OFFSET)
1431	break;
1432	pLookup = (PMMLOOKUPHYPER)((uint8_t *)pLookup + pLookup->offNext);
1433	}
1434	}

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source: vbox/trunk/src/VBox/VMM/VMMR3/MMHyper.cpp@ 39078

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