MMHyper.cpp@ 57009

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1	/* $Id: MMHyper.cpp 56287 2015-06-09 11:15:22Z vboxsync $ */
2	/** @file
3	* MM - Memory Manager - Hypervisor Memory Area.
4	*/
5
6	/*
7	* Copyright (C) 2006-2015 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/hm.h>
26	#include <VBox/vmm/dbgf.h>
27	#include "MMInternal.h"
28	#include <VBox/vmm/vm.h>
29	#include <VBox/err.h>
30	#include <VBox/param.h>
31	#include <VBox/log.h>
32	#include "internal/pgm.h"
33	#include <iprt/alloc.h>
34	#include <iprt/assert.h>
35	#include <iprt/string.h>
36
37
38	/*******************************************************************************
39	* Internal Functions *
40	*******************************************************************************/
41	static DECLCALLBACK(bool) mmR3HyperRelocateCallback(PVM pVM, RTGCPTR GCPtrOld, RTGCPTR GCPtrNew, PGMRELOCATECALL enmMode,
42	void *pvUser);
43	static int mmR3HyperMap(PVM pVM, const size_t cb, const char pszDesc, PRTGCPTR pGCPtr, PMMLOOKUPHYPER ppLookup);
44	static int mmR3HyperHeapCreate(PVM pVM, const size_t cb, PMMHYPERHEAP *ppHeap, PRTR0PTR pR0PtrHeap);
45	static int mmR3HyperHeapMap(PVM pVM, PMMHYPERHEAP pHeap, PRTGCPTR ppHeapGC);
46	static DECLCALLBACK(void) mmR3HyperInfoHma(PVM pVM, PCDBGFINFOHLP pHlp, const char *pszArgs);
47
48
49	/**
50	* Determin the default heap size.
51	*
52	* @returns The heap size in bytes.
53	* @param pVM Pointer to the VM.
54	*/
55	static uint32_t mmR3HyperComputeHeapSize(PVM pVM)
56	{
57	/*
58	* Gather parameters.
59	*/
60	bool fCanUseLargerHeap;
61	int rc = CFGMR3QueryBoolDef(CFGMR3GetChild(CFGMR3GetRoot(pVM), "MM"), "CanUseLargerHeap", &fCanUseLargerHeap, false);
62	AssertStmt(RT_SUCCESS(rc), fCanUseLargerHeap = false);
63
64	uint64_t cbRam;
65	rc = CFGMR3QueryU64(CFGMR3GetRoot(pVM), "RamSize", &cbRam);
66	AssertStmt(RT_SUCCESS(rc), cbRam = _1G);
67
68	/*
69	* We need to keep saved state compatibility if raw-mode is an option,
70	* so lets filter out that case first.
71	*/
72	if ( !fCanUseLargerHeap
73	&& !HMIsEnabled(pVM)
74	&& cbRam < 16*_1G64)
75	return 1280 * _1K;
76
77	/*
78	* Calculate the heap size.
79	*/
80	uint32_t cbHeap = _1M;
81
82	/* The newer chipset may have more devices attached, putting additional
83	pressure on the heap. */
84	if (fCanUseLargerHeap)
85	cbHeap += _1M;
86
87	/* More CPUs means some extra memory usage. */
88	if (pVM->cCpus > 1)
89	cbHeap += pVM->cCpus * _64K;
90
91	/* Lots of memory means extra memory consumption as well (pool). */
92	if (cbRam > 16*_1G64)
93	cbHeap += _2M; /** @todo figure out extactly how much */
94
95	return RT_ALIGN(cbHeap, _256K);
96	}
97
98
99	/**
100	* Initializes the hypervisor related MM stuff without
101	* calling down to PGM.
102	*
103	* PGM is not initialized at this point, PGM relies on
104	* the heap to initialize.
105	*
106	* @returns VBox status.
107	*/
108	int mmR3HyperInit(PVM pVM)
109	{
110	LogFlow(("mmR3HyperInit:\n"));
111
112	/*
113	* Decide Hypervisor mapping in the guest context
114	* And setup various hypervisor area and heap parameters.
115	*/
116	pVM->mm.s.pvHyperAreaGC = (RTGCPTR)MM_HYPER_AREA_ADDRESS;
117	pVM->mm.s.cbHyperArea = MM_HYPER_AREA_MAX_SIZE;
118	AssertRelease(RT_ALIGN_T(pVM->mm.s.pvHyperAreaGC, 1 << X86_PD_SHIFT, RTGCPTR) == pVM->mm.s.pvHyperAreaGC);
119	Assert(pVM->mm.s.pvHyperAreaGC < 0xff000000);
120
121	/** @todo @bugref{1865}, @bugref{3202}: Change the cbHyperHeap default
122	* depending on whether VT-x/AMD-V is enabled or not! Don't waste
123	* precious kernel space on heap for the PATM.
124	*/
125	PCFGMNODE pMM = CFGMR3GetChild(CFGMR3GetRoot(pVM), "MM");
126	uint32_t cbHyperHeap;
127	int rc = CFGMR3QueryU32Def(pMM, "cbHyperHeap", &cbHyperHeap, mmR3HyperComputeHeapSize(pVM));
128	AssertLogRelRCReturn(rc, rc);
129
130	cbHyperHeap = RT_ALIGN_32(cbHyperHeap, PAGE_SIZE);
131	LogRel(("MM: cbHyperHeap=%#x (%u)\n", cbHyperHeap, cbHyperHeap));
132
133	/*
134	* Allocate the hypervisor heap.
135	*
136	* (This must be done before we start adding memory to the
137	* hypervisor static area because lookup records are allocated from it.)
138	*/
139	rc = mmR3HyperHeapCreate(pVM, cbHyperHeap, &pVM->mm.s.pHyperHeapR3, &pVM->mm.s.pHyperHeapR0);
140	if (RT_SUCCESS(rc))
141	{
142	/*
143	* Make a small head fence to fend of accidental sequential access.
144	*/
145	MMR3HyperReserve(pVM, PAGE_SIZE, "fence", NULL);
146
147	/*
148	* Map the VM structure into the hypervisor space.
149	*/
150	AssertRelease(pVM->cbSelf == RT_UOFFSETOF(VM, aCpus[pVM->cCpus]));
151	RTGCPTR GCPtr;
152	rc = MMR3HyperMapPages(pVM, pVM, pVM->pVMR0, RT_ALIGN_Z(pVM->cbSelf, PAGE_SIZE) >> PAGE_SHIFT, pVM->paVMPagesR3, "VM",
153	&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 Pointer to the VM.
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,
357	("GCPtrOld=%RGv pVM->mm.s.pvHyperAreaGC=%RGv\n", GCPtrOld, pVM->mm.s.pvHyperAreaGC));
358	Log(("Relocating the hypervisor from %RGv to %RGv\n", GCPtrOld, GCPtrNew));
359
360	/*
361	* Relocate the VM structure and ourselves.
362	*/
363	RTGCINTPTR offDelta = GCPtrNew - GCPtrOld;
364	pVM->pVMRC += offDelta;
365	for (VMCPUID i = 0; i < pVM->cCpus; i++)
366	pVM->aCpus[i].pVMRC = pVM->pVMRC;
367
368	pVM->mm.s.pvHyperAreaGC += offDelta;
369	Assert(pVM->mm.s.pvHyperAreaGC < _4G);
370	pVM->mm.s.pHyperHeapRC += offDelta;
371	pVM->mm.s.pHyperHeapR3->pbHeapRC += offDelta;
372	pVM->mm.s.pHyperHeapR3->pVMRC = pVM->pVMRC;
373
374	/*
375	* Relocate the rest.
376	*/
377	VMR3Relocate(pVM, offDelta);
378	return true;
379	}
380
381	default:
382	AssertMsgFailed(("Invalid relocation mode %d\n", enmMode));
383	}
384
385	return false;
386	}
387
388	/**
389	* Service a VMMCALLRING3_MMHYPER_LOCK call.
390	*
391	* @returns VBox status code.
392	* @param pVM Pointer to the VM.
393	*/
394	VMMR3DECL(int) MMR3LockCall(PVM pVM)
395	{
396	PMMHYPERHEAP pHeap = pVM->mm.s.CTX_SUFF(pHyperHeap);
397
398	int rc = PDMR3CritSectEnterEx(&pHeap->Lock, true /* fHostCall */);
399	AssertRC(rc);
400	return rc;
401	}
402
403	/**
404	* Maps contiguous HC physical memory into the hypervisor region in the GC.
405	*
406	* @return VBox status code.
407	*
408	* @param pVM Pointer to the VM.
409	* @param pvR3 Ring-3 address of the memory. Must be page aligned!
410	* @param pvR0 Optional ring-0 address of the memory.
411	* @param HCPhys Host context physical address of the memory to be
412	* mapped. Must be page aligned!
413	* @param cb Size of the memory. Will be rounded up to nearest page.
414	* @param pszDesc Description.
415	* @param pGCPtr Where to store the GC address.
416	*/
417	VMMR3DECL(int) MMR3HyperMapHCPhys(PVM pVM, void *pvR3, RTR0PTR pvR0, RTHCPHYS HCPhys, size_t cb,
418	const char *pszDesc, PRTGCPTR pGCPtr)
419	{
420	LogFlow(("MMR3HyperMapHCPhys: pvR3=%p pvR0=%p HCPhys=%RHp cb=%d pszDesc=%p:{%s} pGCPtr=%p\n",
421	pvR3, pvR0, HCPhys, (int)cb, pszDesc, pszDesc, pGCPtr));
422
423	/*
424	* Validate input.
425	*/
426	AssertReturn(RT_ALIGN_P(pvR3, PAGE_SIZE) == pvR3, VERR_INVALID_PARAMETER);
427	AssertReturn(RT_ALIGN_T(pvR0, PAGE_SIZE, RTR0PTR) == pvR0, VERR_INVALID_PARAMETER);
428	AssertReturn(RT_ALIGN_T(HCPhys, PAGE_SIZE, RTHCPHYS) == HCPhys, VERR_INVALID_PARAMETER);
429	AssertReturn(pszDesc && *pszDesc, VERR_INVALID_PARAMETER);
430
431	/*
432	* Add the memory to the hypervisor area.
433	*/
434	uint32_t cbAligned = RT_ALIGN_32(cb, PAGE_SIZE);
435	AssertReturn(cbAligned >= cb, VERR_INVALID_PARAMETER);
436	RTGCPTR GCPtr;
437	PMMLOOKUPHYPER pLookup;
438	int rc = mmR3HyperMap(pVM, cbAligned, pszDesc, &GCPtr, &pLookup);
439	if (RT_SUCCESS(rc))
440	{
441	pLookup->enmType = MMLOOKUPHYPERTYPE_HCPHYS;
442	pLookup->u.HCPhys.pvR3 = pvR3;
443	pLookup->u.HCPhys.pvR0 = pvR0;
444	pLookup->u.HCPhys.HCPhys = HCPhys;
445
446	/*
447	* Update the page table.
448	*/
449	if (pVM->mm.s.fPGMInitialized)
450	rc = PGMMap(pVM, GCPtr, HCPhys, cbAligned, 0);
451	if (RT_SUCCESS(rc))
452	*pGCPtr = GCPtr;
453	}
454	return rc;
455	}
456
457
458	/**
459	* Maps contiguous GC physical memory into the hypervisor region in the GC.
460	*
461	* @return VBox status code.
462	*
463	* @param pVM Pointer to the VM.
464	* @param GCPhys Guest context physical address of the memory to be mapped. Must be page aligned!
465	* @param cb Size of the memory. Will be rounded up to nearest page.
466	* @param pszDesc Mapping description.
467	* @param pGCPtr Where to store the GC address.
468	*/
469	VMMR3DECL(int) MMR3HyperMapGCPhys(PVM pVM, RTGCPHYS GCPhys, size_t cb, const char *pszDesc, PRTGCPTR pGCPtr)
470	{
471	LogFlow(("MMR3HyperMapGCPhys: GCPhys=%RGp cb=%d pszDesc=%p:{%s} pGCPtr=%p\n", GCPhys, (int)cb, pszDesc, pszDesc, pGCPtr));
472
473	/*
474	* Validate input.
475	*/
476	AssertReturn(RT_ALIGN_T(GCPhys, PAGE_SIZE, RTGCPHYS) == GCPhys, VERR_INVALID_PARAMETER);
477	AssertReturn(pszDesc && *pszDesc, VERR_INVALID_PARAMETER);
478
479	/*
480	* Add the memory to the hypervisor area.
481	*/
482	cb = RT_ALIGN_Z(cb, PAGE_SIZE);
483	RTGCPTR GCPtr;
484	PMMLOOKUPHYPER pLookup;
485	int rc = mmR3HyperMap(pVM, cb, pszDesc, &GCPtr, &pLookup);
486	if (RT_SUCCESS(rc))
487	{
488	pLookup->enmType = MMLOOKUPHYPERTYPE_GCPHYS;
489	pLookup->u.GCPhys.GCPhys = GCPhys;
490
491	/*
492	* Update the page table.
493	*/
494	for (unsigned off = 0; off < cb; off += PAGE_SIZE)
495	{
496	RTHCPHYS HCPhys;
497	rc = PGMPhysGCPhys2HCPhys(pVM, GCPhys + off, &HCPhys);
498	AssertRC(rc);
499	if (RT_FAILURE(rc))
500	{
501	AssertMsgFailed(("rc=%Rrc GCPhys=%RGp off=%#x %s\n", rc, GCPhys, off, pszDesc));
502	break;
503	}
504	if (pVM->mm.s.fPGMInitialized)
505	{
506	rc = PGMMap(pVM, GCPtr + off, HCPhys, PAGE_SIZE, 0);
507	AssertRC(rc);
508	if (RT_FAILURE(rc))
509	{
510	AssertMsgFailed(("rc=%Rrc GCPhys=%RGp off=%#x %s\n", rc, GCPhys, off, pszDesc));
511	break;
512	}
513	}
514	}
515
516	if (RT_SUCCESS(rc) && pGCPtr)
517	*pGCPtr = GCPtr;
518	}
519	return rc;
520	}
521
522
523	/**
524	* Maps a portion of an MMIO2 region into the hypervisor region.
525	*
526	* Callers of this API must never deregister the MMIO2 region before the
527	* VM is powered off. If this becomes a requirement MMR3HyperUnmapMMIO2
528	* API will be needed to perform cleanups.
529	*
530	* @return VBox status code.
531	*
532	* @param pVM Pointer to the VM.
533	* @param pDevIns The device owning the MMIO2 memory.
534	* @param iRegion The region.
535	* @param off The offset into the region. Will be rounded down to closest page boundary.
536	* @param cb The number of bytes to map. Will be rounded up to the closest page boundary.
537	* @param pszDesc Mapping description.
538	* @param pRCPtr Where to store the RC address.
539	*/
540	VMMR3DECL(int) MMR3HyperMapMMIO2(PVM pVM, PPDMDEVINS pDevIns, uint32_t iRegion, RTGCPHYS off, RTGCPHYS cb,
541	const char *pszDesc, PRTRCPTR pRCPtr)
542	{
543	LogFlow(("MMR3HyperMapMMIO2: pDevIns=%p iRegion=%#x off=%RGp cb=%RGp pszDesc=%p:{%s} pRCPtr=%p\n",
544	pDevIns, iRegion, off, cb, pszDesc, pszDesc, pRCPtr));
545	int rc;
546
547	/*
548	* Validate input.
549	*/
550	AssertReturn(pszDesc && *pszDesc, VERR_INVALID_PARAMETER);
551	AssertReturn(off + cb > off, VERR_INVALID_PARAMETER);
552	uint32_t const offPage = off & PAGE_OFFSET_MASK;
553	off &= ~(RTGCPHYS)PAGE_OFFSET_MASK;
554	cb += offPage;
555	cb = RT_ALIGN_Z(cb, PAGE_SIZE);
556	const RTGCPHYS offEnd = off + cb;
557	AssertReturn(offEnd > off, VERR_INVALID_PARAMETER);
558	for (RTGCPHYS offCur = off; offCur < offEnd; offCur += PAGE_SIZE)
559	{
560	RTHCPHYS HCPhys;
561	rc = PGMR3PhysMMIO2GetHCPhys(pVM, pDevIns, iRegion, offCur, &HCPhys);
562	AssertMsgRCReturn(rc, ("rc=%Rrc - iRegion=%d off=%RGp\n", rc, iRegion, off), rc);
563	}
564
565	/*
566	* Add the memory to the hypervisor area.
567	*/
568	RTGCPTR GCPtr;
569	PMMLOOKUPHYPER pLookup;
570	rc = mmR3HyperMap(pVM, cb, pszDesc, &GCPtr, &pLookup);
571	if (RT_SUCCESS(rc))
572	{
573	pLookup->enmType = MMLOOKUPHYPERTYPE_MMIO2;
574	pLookup->u.MMIO2.pDevIns = pDevIns;
575	pLookup->u.MMIO2.iRegion = iRegion;
576	pLookup->u.MMIO2.off = off;
577
578	/*
579	* Update the page table.
580	*/
581	if (pVM->mm.s.fPGMInitialized)
582	{
583	for (RTGCPHYS offCur = off; offCur < offEnd; offCur += PAGE_SIZE)
584	{
585	RTHCPHYS HCPhys;
586	rc = PGMR3PhysMMIO2GetHCPhys(pVM, pDevIns, iRegion, offCur, &HCPhys);
587	AssertRCReturn(rc, rc);
588	rc = PGMMap(pVM, GCPtr + (offCur - off), HCPhys, PAGE_SIZE, 0);
589	if (RT_FAILURE(rc))
590	{
591	AssertMsgFailed(("rc=%Rrc offCur=%RGp %s\n", rc, offCur, pszDesc));
592	break;
593	}
594	}
595	}
596
597	if (RT_SUCCESS(rc))
598	{
599	GCPtr \|= offPage;
600	*pRCPtr = GCPtr;
601	AssertLogRelReturn(*pRCPtr == GCPtr, VERR_INTERNAL_ERROR);
602	}
603	}
604	return rc;
605	}
606
607
608	/**
609	* Maps locked R3 virtual memory into the hypervisor region in the GC.
610	*
611	* @return VBox status code.
612	*
613	* @param pVM Pointer to the VM.
614	* @param pvR3 The ring-3 address of the memory, must be page aligned.
615	* @param pvR0 The ring-0 address of the memory, must be page aligned. (optional)
616	* @param cPages The number of pages.
617	* @param paPages The page descriptors.
618	* @param pszDesc Mapping description.
619	* @param pGCPtr Where to store the GC address corresponding to pvR3.
620	*/
621	VMMR3DECL(int) MMR3HyperMapPages(PVM pVM, void *pvR3, RTR0PTR pvR0, size_t cPages, PCSUPPAGE paPages,
622	const char *pszDesc, PRTGCPTR pGCPtr)
623	{
624	LogFlow(("MMR3HyperMapPages: pvR3=%p pvR0=%p cPages=%zu paPages=%p pszDesc=%p:{%s} pGCPtr=%p\n",
625	pvR3, pvR0, cPages, paPages, pszDesc, pszDesc, pGCPtr));
626
627	/*
628	* Validate input.
629	*/
630	AssertPtrReturn(pvR3, VERR_INVALID_POINTER);
631	AssertPtrReturn(paPages, VERR_INVALID_POINTER);
632	AssertReturn(cPages > 0, VERR_PAGE_COUNT_OUT_OF_RANGE);
633	AssertReturn(cPages <= VBOX_MAX_ALLOC_PAGE_COUNT, VERR_PAGE_COUNT_OUT_OF_RANGE);
634	AssertPtrReturn(pszDesc, VERR_INVALID_POINTER);
635	AssertReturn(*pszDesc, VERR_INVALID_PARAMETER);
636	AssertPtrReturn(pGCPtr, VERR_INVALID_PARAMETER);
637
638	/*
639	* Add the memory to the hypervisor area.
640	*/
641	RTGCPTR GCPtr;
642	PMMLOOKUPHYPER pLookup;
643	int rc = mmR3HyperMap(pVM, cPages << PAGE_SHIFT, pszDesc, &GCPtr, &pLookup);
644	if (RT_SUCCESS(rc))
645	{
646	/*
647	* Copy the physical page addresses and tell PGM about them.
648	*/
649	PRTHCPHYS paHCPhysPages = (PRTHCPHYS)MMR3HeapAlloc(pVM, MM_TAG_MM, sizeof(RTHCPHYS) * cPages);
650	if (paHCPhysPages)
651	{
652	for (size_t i = 0; i < cPages; i++)
653	{
654	AssertReleaseMsgReturn( paPages[i].Phys != 0
655	&& paPages[i].Phys != NIL_RTHCPHYS
656	&& !(paPages[i].Phys & PAGE_OFFSET_MASK),
657	("i=%#zx Phys=%RHp %s\n", i, paPages[i].Phys, pszDesc),
658	VERR_INTERNAL_ERROR);
659	paHCPhysPages[i] = paPages[i].Phys;
660	}
661
662	if (pVM->mm.s.fPGMInitialized)
663	{
664	for (size_t i = 0; i < cPages; i++)
665	{
666	rc = PGMMap(pVM, GCPtr + (i << PAGE_SHIFT), paHCPhysPages[i], PAGE_SIZE, 0);
667	AssertRCBreak(rc);
668	}
669	}
670	if (RT_SUCCESS(rc))
671	{
672	pLookup->enmType = MMLOOKUPHYPERTYPE_LOCKED;
673	pLookup->u.Locked.pvR3 = pvR3;
674	pLookup->u.Locked.pvR0 = pvR0;
675	pLookup->u.Locked.paHCPhysPages = paHCPhysPages;
676
677	/* done. */
678	*pGCPtr = GCPtr;
679	return rc;
680	}
681	/* Don't care about failure clean, we're screwed if this fails anyway. */
682	}
683	}
684
685	return rc;
686	}
687
688
689	/**
690	* Reserves a hypervisor memory area.
691	* Most frequent usage is fence pages and dynamically mappings like the guest PD and PDPT.
692	*
693	* @return VBox status code.
694	*
695	* @param pVM Pointer to the VM.
696	* @param cb Size of the memory. Will be rounded up to nearest page.
697	* @param pszDesc Mapping description.
698	* @param pGCPtr Where to store the assigned GC address. Optional.
699	*/
700	VMMR3DECL(int) MMR3HyperReserve(PVM pVM, unsigned cb, const char *pszDesc, PRTGCPTR pGCPtr)
701	{
702	LogFlow(("MMR3HyperMapHCRam: cb=%d pszDesc=%p:{%s} pGCPtr=%p\n", (int)cb, pszDesc, pszDesc, pGCPtr));
703
704	/*
705	* Validate input.
706	*/
707	if ( cb <= 0
708	\|\| !pszDesc
709	\|\| !*pszDesc)
710	{
711	AssertMsgFailed(("Invalid parameter\n"));
712	return VERR_INVALID_PARAMETER;
713	}
714
715	/*
716	* Add the memory to the hypervisor area.
717	*/
718	RTGCPTR GCPtr;
719	PMMLOOKUPHYPER pLookup;
720	int rc = mmR3HyperMap(pVM, cb, pszDesc, &GCPtr, &pLookup);
721	if (RT_SUCCESS(rc))
722	{
723	pLookup->enmType = MMLOOKUPHYPERTYPE_DYNAMIC;
724	if (pGCPtr)
725	*pGCPtr = GCPtr;
726	return VINF_SUCCESS;
727	}
728	return rc;
729	}
730
731
732	/**
733	* Adds memory to the hypervisor memory arena.
734	*
735	* @return VBox status code.
736	* @param pVM Pointer to the VM.
737	* @param cb Size of the memory. Will be rounded up to nearest page.
738	* @param pszDesc The description of the memory.
739	* @param pGCPtr Where to store the GC address.
740	* @param ppLookup Where to store the pointer to the lookup record.
741	* @remark We assume the threading structure of VBox imposes natural
742	* serialization of most functions, this one included.
743	*/
744	static int mmR3HyperMap(PVM pVM, const size_t cb, const char pszDesc, PRTGCPTR pGCPtr, PMMLOOKUPHYPER ppLookup)
745	{
746	/*
747	* Validate input.
748	*/
749	const uint32_t cbAligned = RT_ALIGN_32(cb, PAGE_SIZE);
750	AssertReturn(cbAligned >= cb, VERR_INVALID_PARAMETER);
751	if (pVM->mm.s.offHyperNextStatic + cbAligned >= pVM->mm.s.cbHyperArea) /* don't use the last page, it's a fence. */
752	{
753	AssertMsgFailed(("Out of static mapping space in the HMA! offHyperAreaGC=%x cbAligned=%x cbHyperArea=%x\n",
754	pVM->mm.s.offHyperNextStatic, cbAligned, pVM->mm.s.cbHyperArea));
755	return VERR_NO_MEMORY;
756	}
757
758	/*
759	* Allocate lookup record.
760	*/
761	PMMLOOKUPHYPER pLookup;
762	int rc = MMHyperAlloc(pVM, sizeof(pLookup), 1, MM_TAG_MM, (void *)&pLookup);
763	if (RT_SUCCESS(rc))
764	{
765	/*
766	* Initialize it and insert it.
767	*/
768	pLookup->offNext = pVM->mm.s.offLookupHyper;
769	pLookup->cb = cbAligned;
770	pLookup->off = pVM->mm.s.offHyperNextStatic;
771	pVM->mm.s.offLookupHyper = (uint8_t )pLookup - (uint8_t )pVM->mm.s.pHyperHeapR3;
772	if (pLookup->offNext != (int32_t)NIL_OFFSET)
773	pLookup->offNext -= pVM->mm.s.offLookupHyper;
774	pLookup->enmType = MMLOOKUPHYPERTYPE_INVALID;
775	memset(&pLookup->u, 0xff, sizeof(pLookup->u));
776	pLookup->pszDesc = pszDesc;
777
778	/* Mapping. */
779	*pGCPtr = pVM->mm.s.pvHyperAreaGC + pVM->mm.s.offHyperNextStatic;
780	pVM->mm.s.offHyperNextStatic += cbAligned;
781
782	/* Return pointer. */
783	*ppLookup = pLookup;
784	}
785
786	AssertRC(rc);
787	LogFlow(("mmR3HyperMap: returns %Rrc pGCPtr=%RGv\n", rc, pGCPtr));
788	return rc;
789	}
790
791
792	/**
793	* Allocates a new heap.
794	*
795	* @returns VBox status code.
796	* @param pVM Pointer to the VM.
797	* @param cb The size of the new heap.
798	* @param ppHeap Where to store the heap pointer on successful return.
799	* @param pR0PtrHeap Where to store the ring-0 address of the heap on
800	* success.
801	*/
802	static int mmR3HyperHeapCreate(PVM pVM, const size_t cb, PMMHYPERHEAP *ppHeap, PRTR0PTR pR0PtrHeap)
803	{
804	/*
805	* Allocate the hypervisor heap.
806	*/
807	const uint32_t cbAligned = RT_ALIGN_32(cb, PAGE_SIZE);
808	AssertReturn(cbAligned >= cb, VERR_INVALID_PARAMETER);
809	uint32_t const cPages = cbAligned >> PAGE_SHIFT;
810	PSUPPAGE paPages = (PSUPPAGE)MMR3HeapAlloc(pVM, MM_TAG_MM, cPages * sizeof(paPages[0]));
811	if (!paPages)
812	return VERR_NO_MEMORY;
813	void *pv;
814	RTR0PTR pvR0 = NIL_RTR0PTR;
815	int rc = SUPR3PageAllocEx(cPages,
816	0 /fFlags/,
817	&pv,
818	#if defined(VBOX_WITH_2X_4GB_ADDR_SPACE) \|\| defined(VBOX_WITH_MORE_RING0_MEM_MAPPINGS)
819	&pvR0,
820	#else
821	NULL,
822	#endif
823	paPages);
824	if (RT_SUCCESS(rc))
825	{
826	#if !defined(VBOX_WITH_2X_4GB_ADDR_SPACE) && !defined(VBOX_WITH_MORE_RING0_MEM_MAPPINGS)
827	pvR0 = (uintptr_t)pv;
828	#endif
829	memset(pv, 0, cbAligned);
830
831	/*
832	* Initialize the heap and first free chunk.
833	*/
834	PMMHYPERHEAP pHeap = (PMMHYPERHEAP)pv;
835	pHeap->u32Magic = MMHYPERHEAP_MAGIC;
836	pHeap->pbHeapR3 = (uint8_t *)pHeap + MMYPERHEAP_HDR_SIZE;
837	pHeap->pbHeapR0 = pvR0 != NIL_RTR0PTR ? pvR0 + MMYPERHEAP_HDR_SIZE : NIL_RTR0PTR;
838	//pHeap->pbHeapRC = 0; // set by mmR3HyperHeapMap()
839	pHeap->pVMR3 = pVM;
840	pHeap->pVMR0 = pVM->pVMR0;
841	pHeap->pVMRC = pVM->pVMRC;
842	pHeap->cbHeap = cbAligned - MMYPERHEAP_HDR_SIZE;
843	pHeap->cbFree = pHeap->cbHeap - sizeof(MMHYPERCHUNK);
844	//pHeap->offFreeHead = 0;
845	//pHeap->offFreeTail = 0;
846	pHeap->offPageAligned = pHeap->cbHeap;
847	//pHeap->HyperHeapStatTree = 0;
848	pHeap->paPages = paPages;
849
850	PMMHYPERCHUNKFREE pFree = (PMMHYPERCHUNKFREE)pHeap->pbHeapR3;
851	pFree->cb = pHeap->cbFree;
852	//pFree->core.offNext = 0;
853	MMHYPERCHUNK_SET_TYPE(&pFree->core, MMHYPERCHUNK_FLAGS_FREE);
854	pFree->core.offHeap = -(int32_t)MMYPERHEAP_HDR_SIZE;
855	//pFree->offNext = 0;
856	//pFree->offPrev = 0;
857
858	STAMR3Register(pVM, &pHeap->cbHeap, STAMTYPE_U32, STAMVISIBILITY_ALWAYS, "/MM/HyperHeap/cbHeap", STAMUNIT_BYTES, "The heap size.");
859	STAMR3Register(pVM, &pHeap->cbFree, STAMTYPE_U32, STAMVISIBILITY_ALWAYS, "/MM/HyperHeap/cbFree", STAMUNIT_BYTES, "The free space.");
860
861	*ppHeap = pHeap;
862	*pR0PtrHeap = pvR0;
863	return VINF_SUCCESS;
864	}
865	AssertMsgFailed(("SUPR3PageAllocEx(%d,,,,) -> %Rrc\n", cbAligned >> PAGE_SHIFT, rc));
866
867	*ppHeap = NULL;
868	return rc;
869	}
870
871	/**
872	* Allocates a new heap.
873	*/
874	static int mmR3HyperHeapMap(PVM pVM, PMMHYPERHEAP pHeap, PRTGCPTR ppHeapGC)
875	{
876	Assert(RT_ALIGN_Z(pHeap->cbHeap + MMYPERHEAP_HDR_SIZE, PAGE_SIZE) == pHeap->cbHeap + MMYPERHEAP_HDR_SIZE);
877	Assert(pHeap->paPages);
878	int rc = MMR3HyperMapPages(pVM,
879	pHeap,
880	pHeap->pbHeapR0 != NIL_RTR0PTR ? pHeap->pbHeapR0 - MMYPERHEAP_HDR_SIZE : NIL_RTR0PTR,
881	(pHeap->cbHeap + MMYPERHEAP_HDR_SIZE) >> PAGE_SHIFT,
882	pHeap->paPages,
883	"Heap", ppHeapGC);
884	if (RT_SUCCESS(rc))
885	{
886	pHeap->pVMRC = pVM->pVMRC;
887	pHeap->pbHeapRC = *ppHeapGC + MMYPERHEAP_HDR_SIZE;
888	/* Reserve a page for fencing. */
889	MMR3HyperReserve(pVM, PAGE_SIZE, "fence", NULL);
890
891	/* We won't need these any more. */
892	MMR3HeapFree(pHeap->paPages);
893	pHeap->paPages = NULL;
894	}
895	return rc;
896	}
897
898
899	/**
900	* Allocates memory in the Hypervisor (GC VMM) area which never will
901	* be freed and doesn't have any offset based relation to other heap blocks.
902	*
903	* The latter means that two blocks allocated by this API will not have the
904	* same relative position to each other in GC and HC. In short, never use
905	* this API for allocating nodes for an offset based AVL tree!
906	*
907	* The returned memory is of course zeroed.
908	*
909	* @returns VBox status code.
910	* @param pVM Pointer to the VM.
911	* @param cb Number of bytes to allocate.
912	* @param uAlignment Required memory alignment in bytes.
913	* Values are 0,8,16,32 and PAGE_SIZE.
914	* 0 -> default alignment, i.e. 8 bytes.
915	* @param enmTag The statistics tag.
916	* @param ppv Where to store the address to the allocated
917	* memory.
918	* @remark This is assumed not to be used at times when serialization is required.
919	*/
920	VMMR3DECL(int) MMR3HyperAllocOnceNoRel(PVM pVM, size_t cb, unsigned uAlignment, MMTAG enmTag, void **ppv)
921	{
922	return MMR3HyperAllocOnceNoRelEx(pVM, cb, uAlignment, enmTag, 0/fFlags/, ppv);
923	}
924
925
926	/**
927	* Allocates memory in the Hypervisor (GC VMM) area which never will
928	* be freed and doesn't have any offset based relation to other heap blocks.
929	*
930	* The latter means that two blocks allocated by this API will not have the
931	* same relative position to each other in GC and HC. In short, never use
932	* this API for allocating nodes for an offset based AVL tree!
933	*
934	* The returned memory is of course zeroed.
935	*
936	* @returns VBox status code.
937	* @param pVM Pointer to the VM.
938	* @param cb Number of bytes to allocate.
939	* @param uAlignment Required memory alignment in bytes.
940	* Values are 0,8,16,32 and PAGE_SIZE.
941	* 0 -> default alignment, i.e. 8 bytes.
942	* @param enmTag The statistics tag.
943	* @param fFlags Flags, see MMHYPER_AONR_FLAGS_KERNEL_MAPPING.
944	* @param ppv Where to store the address to the allocated memory.
945	* @remark This is assumed not to be used at times when serialization is required.
946	*/
947	VMMR3DECL(int) MMR3HyperAllocOnceNoRelEx(PVM pVM, size_t cb, unsigned uAlignment, MMTAG enmTag, uint32_t fFlags, void **ppv)
948	{
949	AssertMsg(cb >= 8, ("Hey! Do you really mean to allocate less than 8 bytes?! cb=%d\n", cb));
950	Assert(!(fFlags & ~(MMHYPER_AONR_FLAGS_KERNEL_MAPPING)));
951
952	/*
953	* Choose between allocating a new chunk of HMA memory
954	* and the heap. We will only do BIG allocations from HMA and
955	* only at creation time.
956	*/
957	if ( ( cb < _64K
958	&& ( uAlignment != PAGE_SIZE
959	\|\| cb < 48*_1K)
960	&& !(fFlags & MMHYPER_AONR_FLAGS_KERNEL_MAPPING)
961	)
962	\|\| VMR3GetState(pVM) != VMSTATE_CREATING
963	)
964	{
965	Assert(!(fFlags & MMHYPER_AONR_FLAGS_KERNEL_MAPPING));
966	int rc = MMHyperAlloc(pVM, cb, uAlignment, enmTag, ppv);
967	if ( rc != VERR_MM_HYPER_NO_MEMORY
968	\|\| cb <= 8*_1K)
969	{
970	Log2(("MMR3HyperAllocOnceNoRel: cb=%#zx uAlignment=%#x returns %Rrc and *ppv=%p\n",
971	cb, uAlignment, rc, *ppv));
972	return rc;
973	}
974	}
975
976	#ifdef VBOX_WITH_2X_4GB_ADDR_SPACE
977	/*
978	* Set MMHYPER_AONR_FLAGS_KERNEL_MAPPING if we're in going to execute in ring-0.
979	*/
980	if (HMIsEnabled(pVM))
981	fFlags \|= MMHYPER_AONR_FLAGS_KERNEL_MAPPING;
982	#endif
983
984	/*
985	* Validate alignment.
986	*/
987	switch (uAlignment)
988	{
989	case 0:
990	case 8:
991	case 16:
992	case 32:
993	case PAGE_SIZE:
994	break;
995	default:
996	AssertMsgFailed(("Invalid alignment %u\n", uAlignment));
997	return VERR_INVALID_PARAMETER;
998	}
999
1000	/*
1001	* Allocate the pages and map them into HMA space.
1002	*/
1003	uint32_t const cbAligned = RT_ALIGN_32(cb, PAGE_SIZE);
1004	AssertReturn(cbAligned >= cb, VERR_INVALID_PARAMETER);
1005	uint32_t const cPages = cbAligned >> PAGE_SHIFT;
1006	PSUPPAGE paPages = (PSUPPAGE)RTMemTmpAlloc(cPages * sizeof(paPages[0]));
1007	if (!paPages)
1008	return VERR_NO_TMP_MEMORY;
1009	void *pvPages;
1010	RTR0PTR pvR0 = NIL_RTR0PTR;
1011	int rc = SUPR3PageAllocEx(cPages,
1012	0 /fFlags/,
1013	&pvPages,
1014	#ifdef VBOX_WITH_MORE_RING0_MEM_MAPPINGS
1015	&pvR0,
1016	#else
1017	fFlags & MMHYPER_AONR_FLAGS_KERNEL_MAPPING ? &pvR0 : NULL,
1018	#endif
1019	paPages);
1020	if (RT_SUCCESS(rc))
1021	{
1022	#ifdef VBOX_WITH_MORE_RING0_MEM_MAPPINGS
1023	Assert(pvR0 != NIL_RTR0PTR);
1024	#else
1025	if (!(fFlags & MMHYPER_AONR_FLAGS_KERNEL_MAPPING))
1026	# ifdef VBOX_WITH_2X_4GB_ADDR_SPACE
1027	pvR0 = NIL_RTR0PTR;
1028	# else
1029	pvR0 = (RTR0PTR)pvPages;
1030	# endif
1031	#endif
1032
1033	memset(pvPages, 0, cbAligned);
1034
1035	RTGCPTR GCPtr;
1036	rc = MMR3HyperMapPages(pVM,
1037	pvPages,
1038	pvR0,
1039	cPages,
1040	paPages,
1041	MMR3HeapAPrintf(pVM, MM_TAG_MM, "alloc once (%s)", mmGetTagName(enmTag)),
1042	&GCPtr);
1043	if (RT_SUCCESS(rc))
1044	{
1045	*ppv = pvPages;
1046	Log2(("MMR3HyperAllocOnceNoRel: cbAligned=%#x uAlignment=%#x returns VINF_SUCCESS and *ppv=%p\n",
1047	cbAligned, uAlignment, *ppv));
1048	MMR3HyperReserve(pVM, PAGE_SIZE, "fence", NULL);
1049	return rc;
1050	}
1051	AssertMsgFailed(("Failed to allocate %zd bytes! %Rrc\n", cbAligned, rc));
1052	SUPR3PageFreeEx(pvPages, cPages);
1053
1054
1055	/*
1056	* HACK ALERT! Try allocate it off the heap so that we don't freak
1057	* out during vga/vmmdev mmio2 allocation with certain ram sizes.
1058	*/
1059	/** @todo make a proper fix for this so we will never end up in this kind of situation! */
1060	Log(("MMR3HyperAllocOnceNoRel: MMR3HyperMapHCRam failed with rc=%Rrc, try MMHyperAlloc(,%#x,,) instead\n", rc, cb));
1061	int rc2 = MMHyperAlloc(pVM, cb, uAlignment, enmTag, ppv);
1062	if (RT_SUCCESS(rc2))
1063	{
1064	Log2(("MMR3HyperAllocOnceNoRel: cb=%#x uAlignment=%#x returns %Rrc and *ppv=%p\n",
1065	cb, uAlignment, rc, *ppv));
1066	return rc;
1067	}
1068	}
1069	else
1070	AssertMsgFailed(("Failed to allocate %zd bytes! %Rrc\n", cbAligned, rc));
1071
1072	if (rc == VERR_NO_MEMORY)
1073	rc = VERR_MM_HYPER_NO_MEMORY;
1074	LogRel(("MMR3HyperAllocOnceNoRel: cb=%#zx uAlignment=%#x returns %Rrc\n", cb, uAlignment, rc));
1075	return rc;
1076	}
1077
1078
1079	/**
1080	* Lookus up a ring-3 pointer to HMA.
1081	*
1082	* @returns The lookup record on success, NULL on failure.
1083	* @param pVM Pointer to the VM.
1084	* @param pvR3 The ring-3 address to look up.
1085	*/
1086	DECLINLINE(PMMLOOKUPHYPER) mmR3HyperLookupR3(PVM pVM, void *pvR3)
1087	{
1088	PMMLOOKUPHYPER pLookup = (PMMLOOKUPHYPER)((uint8_t *)pVM->mm.s.pHyperHeapR3 + pVM->mm.s.offLookupHyper);
1089	for (;;)
1090	{
1091	switch (pLookup->enmType)
1092	{
1093	case MMLOOKUPHYPERTYPE_LOCKED:
1094	{
1095	unsigned off = (uint8_t )pvR3 - (uint8_t )pLookup->u.Locked.pvR3;
1096	if (off < pLookup->cb)
1097	return pLookup;
1098	break;
1099	}
1100
1101	case MMLOOKUPHYPERTYPE_HCPHYS:
1102	{
1103	unsigned off = (uint8_t )pvR3 - (uint8_t )pLookup->u.HCPhys.pvR3;
1104	if (off < pLookup->cb)
1105	return pLookup;
1106	break;
1107	}
1108
1109	case MMLOOKUPHYPERTYPE_GCPHYS:
1110	case MMLOOKUPHYPERTYPE_MMIO2:
1111	case MMLOOKUPHYPERTYPE_DYNAMIC:
1112	/** @todo ? */
1113	break;
1114
1115	default:
1116	AssertMsgFailed(("enmType=%d\n", pLookup->enmType));
1117	return NULL;
1118	}
1119
1120	/* next */
1121	if ((unsigned)pLookup->offNext == NIL_OFFSET)
1122	return NULL;
1123	pLookup = (PMMLOOKUPHYPER)((uint8_t *)pLookup + pLookup->offNext);
1124	}
1125	}
1126
1127
1128	/**
1129	* Set / unset guard status on one or more hyper heap pages.
1130	*
1131	* @returns VBox status code (first failure).
1132	* @param pVM Pointer to the VM.
1133	* @param pvStart The hyper heap page address. Must be page
1134	* aligned.
1135	* @param cb The number of bytes. Must be page aligned.
1136	* @param fSet Whether to set or unset guard page status.
1137	*/
1138	VMMR3DECL(int) MMR3HyperSetGuard(PVM pVM, void *pvStart, size_t cb, bool fSet)
1139	{
1140	/*
1141	* Validate input.
1142	*/
1143	AssertReturn(!((uintptr_t)pvStart & PAGE_OFFSET_MASK), VERR_INVALID_POINTER);
1144	AssertReturn(!(cb & PAGE_OFFSET_MASK), VERR_INVALID_PARAMETER);
1145	AssertReturn(cb <= UINT32_MAX, VERR_INVALID_PARAMETER);
1146	PMMLOOKUPHYPER pLookup = mmR3HyperLookupR3(pVM, pvStart);
1147	AssertReturn(pLookup, VERR_INVALID_PARAMETER);
1148	AssertReturn(pLookup->enmType == MMLOOKUPHYPERTYPE_LOCKED, VERR_INVALID_PARAMETER);
1149
1150	/*
1151	* Get down to business.
1152	* Note! We quietly ignore errors from the support library since the
1153	* protection stuff isn't possible to implement on all platforms.
1154	*/
1155	uint8_t pbR3 = (uint8_t )pLookup->u.Locked.pvR3;
1156	RTR0PTR R0Ptr = pLookup->u.Locked.pvR0 != (uintptr_t)pLookup->u.Locked.pvR3
1157	? pLookup->u.Locked.pvR0
1158	: NIL_RTR0PTR;
1159	uint32_t off = (uint32_t)((uint8_t *)pvStart - pbR3);
1160	int rc;
1161	if (fSet)
1162	{
1163	rc = PGMMapSetPage(pVM, MMHyperR3ToRC(pVM, pvStart), cb, 0);
1164	SUPR3PageProtect(pbR3, R0Ptr, off, (uint32_t)cb, RTMEM_PROT_NONE);
1165	}
1166	else
1167	{
1168	rc = PGMMapSetPage(pVM, MMHyperR3ToRC(pVM, pvStart), cb, X86_PTE_P \| X86_PTE_A \| X86_PTE_D \| X86_PTE_RW);
1169	SUPR3PageProtect(pbR3, R0Ptr, off, (uint32_t)cb, RTMEM_PROT_READ \| RTMEM_PROT_WRITE);
1170	}
1171	return rc;
1172	}
1173
1174
1175	/**
1176	* Convert hypervisor HC virtual address to HC physical address.
1177	*
1178	* @returns HC physical address.
1179	* @param pVM Pointer to the VM
1180	* @param pvR3 Host context virtual address.
1181	*/
1182	VMMR3DECL(RTHCPHYS) MMR3HyperHCVirt2HCPhys(PVM pVM, void *pvR3)
1183	{
1184	PMMLOOKUPHYPER pLookup = (PMMLOOKUPHYPER)((uint8_t *)pVM->mm.s.pHyperHeapR3 + pVM->mm.s.offLookupHyper);
1185	for (;;)
1186	{
1187	switch (pLookup->enmType)
1188	{
1189	case MMLOOKUPHYPERTYPE_LOCKED:
1190	{
1191	unsigned off = (uint8_t )pvR3 - (uint8_t )pLookup->u.Locked.pvR3;
1192	if (off < pLookup->cb)
1193	return pLookup->u.Locked.paHCPhysPages[off >> PAGE_SHIFT] \| (off & PAGE_OFFSET_MASK);
1194	break;
1195	}
1196
1197	case MMLOOKUPHYPERTYPE_HCPHYS:
1198	{
1199	unsigned off = (uint8_t )pvR3 - (uint8_t )pLookup->u.HCPhys.pvR3;
1200	if (off < pLookup->cb)
1201	return pLookup->u.HCPhys.HCPhys + off;
1202	break;
1203	}
1204
1205	case MMLOOKUPHYPERTYPE_GCPHYS:
1206	case MMLOOKUPHYPERTYPE_MMIO2:
1207	case MMLOOKUPHYPERTYPE_DYNAMIC:
1208	/* can (or don't want to) convert these kind of records. */
1209	break;
1210
1211	default:
1212	AssertMsgFailed(("enmType=%d\n", pLookup->enmType));
1213	break;
1214	}
1215
1216	/* next */
1217	if ((unsigned)pLookup->offNext == NIL_OFFSET)
1218	break;
1219	pLookup = (PMMLOOKUPHYPER)((uint8_t *)pLookup + pLookup->offNext);
1220	}
1221
1222	AssertMsgFailed(("pvR3=%p is not inside the hypervisor memory area!\n", pvR3));
1223	return NIL_RTHCPHYS;
1224	}
1225
1226
1227	/**
1228	* Implements the hcphys-not-found return case of MMR3HyperQueryInfoFromHCPhys.
1229	*
1230	* @returns VINF_SUCCESS, VINF_BUFFER_OVERFLOW.
1231	* @param pVM Pointer to the VM.
1232	* @param HCPhys The host physical address to look for.
1233	* @param pLookup The HMA lookup entry corresponding to HCPhys.
1234	* @param pszWhat Where to return the description.
1235	* @param cbWhat Size of the return buffer.
1236	* @param pcbAlloc Where to return the size of whatever it is.
1237	*/
1238	static int mmR3HyperQueryInfoFromHCPhysFound(PVM pVM, RTHCPHYS HCPhys, PMMLOOKUPHYPER pLookup,
1239	char pszWhat, size_t cbWhat, uint32_t pcbAlloc)
1240	{
1241	NOREF(pVM); NOREF(HCPhys);
1242	*pcbAlloc = pLookup->cb;
1243	int rc = RTStrCopy(pszWhat, cbWhat, pLookup->pszDesc);
1244	return rc == VERR_BUFFER_OVERFLOW ? VINF_BUFFER_OVERFLOW : rc;
1245	}
1246
1247
1248	/**
1249	* Scans the HMA for the physical page and reports back a description if found.
1250	*
1251	* @returns VINF_SUCCESS, VINF_BUFFER_OVERFLOW, VERR_NOT_FOUND.
1252	* @param pVM Pointer to the VM.
1253	* @param HCPhys The host physical address to look for.
1254	* @param pszWhat Where to return the description.
1255	* @param cbWhat Size of the return buffer.
1256	* @param pcbAlloc Where to return the size of whatever it is.
1257	*/
1258	VMMR3_INT_DECL(int) MMR3HyperQueryInfoFromHCPhys(PVM pVM, RTHCPHYS HCPhys, char pszWhat, size_t cbWhat, uint32_t pcbAlloc)
1259	{
1260	RTHCPHYS HCPhysPage = HCPhys & ~(RTHCPHYS)PAGE_OFFSET_MASK;
1261	PMMLOOKUPHYPER pLookup = (PMMLOOKUPHYPER)((uint8_t *)pVM->mm.s.pHyperHeapR3 + pVM->mm.s.offLookupHyper);
1262	for (;;)
1263	{
1264	switch (pLookup->enmType)
1265	{
1266	case MMLOOKUPHYPERTYPE_LOCKED:
1267	{
1268	uint32_t i = pLookup->cb >> PAGE_SHIFT;
1269	while (i-- > 0)
1270	if (pLookup->u.Locked.paHCPhysPages[i] == HCPhysPage)
1271	return mmR3HyperQueryInfoFromHCPhysFound(pVM, HCPhys, pLookup, pszWhat, cbWhat, pcbAlloc);
1272	break;
1273	}
1274
1275	case MMLOOKUPHYPERTYPE_HCPHYS:
1276	{
1277	if (pLookup->u.HCPhys.HCPhys - HCPhysPage < pLookup->cb)
1278	return mmR3HyperQueryInfoFromHCPhysFound(pVM, HCPhys, pLookup, pszWhat, cbWhat, pcbAlloc);
1279	break;
1280	}
1281
1282	case MMLOOKUPHYPERTYPE_MMIO2:
1283	case MMLOOKUPHYPERTYPE_GCPHYS:
1284	case MMLOOKUPHYPERTYPE_DYNAMIC:
1285	{
1286	/* brute force. */
1287	uint32_t i = pLookup->cb >> PAGE_SHIFT;
1288	while (i-- > 0)
1289	{
1290	RTGCPTR GCPtr = pLookup->off + pVM->mm.s.pvHyperAreaGC;
1291	RTHCPHYS HCPhysCur;
1292	int rc = PGMMapGetPage(pVM, GCPtr, NULL, &HCPhysCur);
1293	if (RT_SUCCESS(rc) && HCPhysCur == HCPhysPage)
1294	return mmR3HyperQueryInfoFromHCPhysFound(pVM, HCPhys, pLookup, pszWhat, cbWhat, pcbAlloc);
1295	}
1296	break;
1297	}
1298	default:
1299	AssertMsgFailed(("enmType=%d\n", pLookup->enmType));
1300	break;
1301	}
1302
1303	/* next */
1304	if ((unsigned)pLookup->offNext == NIL_OFFSET)
1305	break;
1306	pLookup = (PMMLOOKUPHYPER)((uint8_t *)pLookup + pLookup->offNext);
1307	}
1308	return VERR_NOT_FOUND;
1309	}
1310
1311
1312	#if 0 /* unused, not implemented */
1313	/**
1314	* Convert hypervisor HC physical address to HC virtual address.
1315	*
1316	* @returns HC virtual address.
1317	* @param pVM Pointer to the VM
1318	* @param HCPhys Host context physical address.
1319	*/
1320	VMMR3DECL(void *) MMR3HyperHCPhys2HCVirt(PVM pVM, RTHCPHYS HCPhys)
1321	{
1322	void *pv;
1323	int rc = MMR3HyperHCPhys2HCVirtEx(pVM, HCPhys, &pv);
1324	if (RT_SUCCESS(rc))
1325	return pv;
1326	AssertMsgFailed(("Invalid address HCPhys=%x rc=%d\n", HCPhys, rc));
1327	return NULL;
1328	}
1329
1330
1331	/**
1332	* Convert hypervisor HC physical address to HC virtual address.
1333	*
1334	* @returns VBox status.
1335	* @param pVM Pointer to the VM
1336	* @param HCPhys Host context physical address.
1337	* @param ppv Where to store the HC virtual address.
1338	*/
1339	VMMR3DECL(int) MMR3HyperHCPhys2HCVirtEx(PVM pVM, RTHCPHYS HCPhys, void **ppv)
1340	{
1341	/*
1342	* Linear search.
1343	*/
1344	/** @todo implement when actually used. */
1345	return VERR_INVALID_POINTER;
1346	}
1347	#endif /* unused, not implemented */
1348
1349
1350	/**
1351	* Read hypervisor memory from GC virtual address.
1352	*
1353	* @returns VBox status.
1354	* @param pVM Pointer to the VM.
1355	* @param pvDst Destination address (HC of course).
1356	* @param GCPtr GC virtual address.
1357	* @param cb Number of bytes to read.
1358	*
1359	* @remarks For DBGF only.
1360	*/
1361	VMMR3DECL(int) MMR3HyperReadGCVirt(PVM pVM, void *pvDst, RTGCPTR GCPtr, size_t cb)
1362	{
1363	if (GCPtr - pVM->mm.s.pvHyperAreaGC >= pVM->mm.s.cbHyperArea)
1364	return VERR_INVALID_POINTER;
1365	return PGMR3MapRead(pVM, pvDst, GCPtr, cb);
1366	}
1367
1368
1369	/**
1370	* Info handler for 'hma', it dumps the list of lookup records for the hypervisor memory area.
1371	*
1372	* @param pVM Pointer to the VM.
1373	* @param pHlp Callback functions for doing output.
1374	* @param pszArgs Argument string. Optional and specific to the handler.
1375	*/
1376	static DECLCALLBACK(void) mmR3HyperInfoHma(PVM pVM, PCDBGFINFOHLP pHlp, const char *pszArgs)
1377	{
1378	NOREF(pszArgs);
1379
1380	pHlp->pfnPrintf(pHlp, "Hypervisor Memory Area (HMA) Layout: Base %RGv, 0x%08x bytes\n",
1381	pVM->mm.s.pvHyperAreaGC, pVM->mm.s.cbHyperArea);
1382
1383	PMMLOOKUPHYPER pLookup = (PMMLOOKUPHYPER)((uint8_t *)pVM->mm.s.pHyperHeapR3 + pVM->mm.s.offLookupHyper);
1384	for (;;)
1385	{
1386	switch (pLookup->enmType)
1387	{
1388	case MMLOOKUPHYPERTYPE_LOCKED:
1389	pHlp->pfnPrintf(pHlp, "%RGv-%RGv %RHv %RHv LOCKED %-*s %s\n",
1390	pLookup->off + pVM->mm.s.pvHyperAreaGC,
1391	pLookup->off + pVM->mm.s.pvHyperAreaGC + pLookup->cb,
1392	pLookup->u.Locked.pvR3,
1393	pLookup->u.Locked.pvR0,
1394	sizeof(RTHCPTR) * 2, "",
1395	pLookup->pszDesc);
1396	break;
1397
1398	case MMLOOKUPHYPERTYPE_HCPHYS:
1399	pHlp->pfnPrintf(pHlp, "%RGv-%RGv %RHv %RHv HCPHYS %RHp %s\n",
1400	pLookup->off + pVM->mm.s.pvHyperAreaGC,
1401	pLookup->off + pVM->mm.s.pvHyperAreaGC + pLookup->cb,
1402	pLookup->u.HCPhys.pvR3,
1403	pLookup->u.HCPhys.pvR0,
1404	pLookup->u.HCPhys.HCPhys,
1405	pLookup->pszDesc);
1406	break;
1407
1408	case MMLOOKUPHYPERTYPE_GCPHYS:
1409	pHlp->pfnPrintf(pHlp, "%RGv-%RGv %s GCPHYS %RGp%s %s\n",
1410	pLookup->off + pVM->mm.s.pvHyperAreaGC,
1411	pLookup->off + pVM->mm.s.pvHyperAreaGC + pLookup->cb,
1412	sizeof(RTHCPTR) * 2 * 2 + 1, "",
1413	pLookup->u.GCPhys.GCPhys, RT_ABS((int)(sizeof(RTHCPHYS) - sizeof(RTGCPHYS))) * 2, "",
1414	pLookup->pszDesc);
1415	break;
1416
1417	case MMLOOKUPHYPERTYPE_MMIO2:
1418	pHlp->pfnPrintf(pHlp, "%RGv-%RGv %s MMIO2 %RGp%s %s\n",
1419	pLookup->off + pVM->mm.s.pvHyperAreaGC,
1420	pLookup->off + pVM->mm.s.pvHyperAreaGC + pLookup->cb,
1421	sizeof(RTHCPTR) * 2 * 2 + 1, "",
1422	pLookup->u.MMIO2.off, RT_ABS((int)(sizeof(RTHCPHYS) - sizeof(RTGCPHYS))) * 2, "",
1423	pLookup->pszDesc);
1424	break;
1425
1426	case MMLOOKUPHYPERTYPE_DYNAMIC:
1427	pHlp->pfnPrintf(pHlp, "%RGv-%RGv %s DYNAMIC %s %s\n",
1428	pLookup->off + pVM->mm.s.pvHyperAreaGC,
1429	pLookup->off + pVM->mm.s.pvHyperAreaGC + pLookup->cb,
1430	sizeof(RTHCPTR) * 2 * 2 + 1, "",
1431	sizeof(RTHCPTR) * 2, "",
1432	pLookup->pszDesc);
1433	break;
1434
1435	default:
1436	AssertMsgFailed(("enmType=%d\n", pLookup->enmType));
1437	break;
1438	}
1439
1440	/* next */
1441	if ((unsigned)pLookup->offNext == NIL_OFFSET)
1442	break;
1443	pLookup = (PMMLOOKUPHYPER)((uint8_t *)pLookup + pLookup->offNext);
1444	}
1445	}
1446
1447
1448	/**
1449	* Re-allocates memory from the hyper heap.
1450	*
1451	* @returns VBox status code.
1452	* @param pVM Pointer to the VM.
1453	* @param pvOld The existing block of memory in the hyper heap to
1454	* re-allocate (can be NULL).
1455	* @param cbOld Size of the existing block.
1456	* @param uAlignmentNew Required memory alignment in bytes. Values are
1457	* 0,8,16,32 and PAGE_SIZE. 0 -> default alignment,
1458	* i.e. 8 bytes.
1459	* @param enmTagNew The statistics tag.
1460	* @param cbNew The required size of the new block.
1461	* @param ppv Where to store the address to the re-allocated
1462	* block.
1463	*
1464	* @remarks This does not work like normal realloc() on failure, the memory
1465	* pointed to by @a pvOld is lost if there isn't sufficient space on
1466	* the hyper heap for the re-allocation to succeed.
1467	*/
1468	VMMR3DECL(int) MMR3HyperRealloc(PVM pVM, void *pvOld, size_t cbOld, unsigned uAlignmentNew, MMTAG enmTagNew, size_t cbNew,
1469	void **ppv)
1470	{
1471	if (!pvOld)
1472	return MMHyperAlloc(pVM, cbNew, uAlignmentNew, enmTagNew, ppv);
1473
1474	if (!cbNew && pvOld)
1475	return MMHyperFree(pVM, pvOld);
1476
1477	if (cbOld == cbNew)
1478	return VINF_SUCCESS;
1479
1480	size_t cbData = RT_MIN(cbNew, cbOld);
1481	void *pvTmp = RTMemTmpAlloc(cbData);
1482	if (RT_UNLIKELY(!pvTmp))
1483	{
1484	MMHyperFree(pVM, pvOld);
1485	return VERR_NO_TMP_MEMORY;
1486	}
1487	memcpy(pvTmp, pvOld, cbData);
1488
1489	int rc = MMHyperFree(pVM, pvOld);
1490	if (RT_SUCCESS(rc))
1491	{
1492	rc = MMHyperAlloc(pVM, cbNew, uAlignmentNew, enmTagNew, ppv);
1493	if (RT_SUCCESS(rc))
1494	{
1495	Assert(cbData <= cbNew);
1496	memcpy(*ppv, pvTmp, cbData);
1497	}
1498	}
1499	else
1500	AssertMsgFailed(("Failed to free hyper heap block pvOld=%p cbOld=%u\n", pvOld, cbOld));
1501
1502	RTMemTmpFree(pvTmp);
1503	return rc;
1504	}
1505

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source: vbox/trunk/src/VBox/VMM/VMMR3/MMHyper.cpp@ 57009

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