GIM.cpp@ 63465

Last change on this file since 63465 was 62641, checked in by vboxsync, 8 years ago
GIM: Please refrain from using 'c' as 'const', 'c' always means 'count of' and make variables like 'pcRegion' very very confusing. The compiler will tell you if you try access a const variable, don't worry. Fixed unused variable warnings/
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File size: 22.2 KB

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1	/* $Id: GIM.cpp 62641 2016-07-28 21:11:13Z vboxsync $ */
2	/** @file
3	* GIM - Guest Interface Manager.
4	*/
5
6	/*
7	* Copyright (C) 2014-2016 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	/** @page pg_gim GIM - The Guest Interface Manager
19	*
20	* The Guest Interface Manager abstracts an interface provider through which
21	* guests may interact with the hypervisor.
22	*
23	* @see grp_gim
24	*
25	*
26	* @section sec_gim_provider Providers
27	*
28	* A GIM provider implements a particular hypervisor interface such as Microsoft
29	* Hyper-V, Linux KVM and so on. It hooks into various components in the VMM to
30	* ease the guest in running under a recognized, virtualized environment.
31	*
32	* The GIM provider configured for the VM needs to be recognized by the guest OS
33	* in order to make use of features supported by the interface. Since it
34	* requires co-operation from the guest OS, a GIM provider may also referred to
35	* as a paravirtualization interface.
36	*
37	* One of the goals of having a paravirtualized interface is for enabling guests
38	* to be more accurate and efficient when operating in a virtualized
39	* environment. For instance, a guest OS which interfaces to VirtualBox through
40	* a GIM provider may rely on the provider for supplying the correct TSC
41	* frequency of the host processor. The guest can then avoid caliberating the
42	* TSC itself, resulting in higher accuracy and better performance.
43	*
44	* At most, only one GIM provider can be active for a running VM and cannot be
45	* changed during the lifetime of the VM.
46	*/
47
48
49	/*********************************************************************************************************************************
50	* Header Files *
51	*********************************************************************************************************************************/
52	#define LOG_GROUP LOG_GROUP_GIM
53	#include <VBox/vmm/gim.h>
54	#include <VBox/vmm/hm.h>
55	#include <VBox/vmm/ssm.h>
56	#include <VBox/vmm/pdmdev.h>
57	#include "GIMInternal.h"
58	#include <VBox/vmm/vm.h>
59
60	#include <VBox/log.h>
61
62	#include <iprt/err.h>
63	#include <iprt/semaphore.h>
64	#include <iprt/string.h>
65
66	/* Include all GIM providers. */
67	#include "GIMMinimalInternal.h"
68	#include "GIMHvInternal.h"
69	#include "GIMKvmInternal.h"
70
71
72	/*********************************************************************************************************************************
73	* Internal Functions *
74	*********************************************************************************************************************************/
75	static FNSSMINTSAVEEXEC gimR3Save;
76	static FNSSMINTLOADEXEC gimR3Load;
77
78
79	/**
80	* Initializes the GIM.
81	*
82	* @returns VBox status code.
83	* @param pVM The cross context VM structure.
84	*/
85	VMMR3_INT_DECL(int) GIMR3Init(PVM pVM)
86	{
87	LogFlow(("GIMR3Init\n"));
88
89	/*
90	* Assert alignment and sizes.
91	*/
92	AssertCompile(sizeof(pVM->gim.s) <= sizeof(pVM->gim.padding));
93	AssertCompile(sizeof(pVM->aCpus[0].gim.s) <= sizeof(pVM->aCpus[0].gim.padding));
94
95	/*
96	* Initialize members.
97	*/
98	pVM->gim.s.hSemiReadOnlyMmio2Handler = NIL_PGMPHYSHANDLERTYPE;
99
100	/*
101	* Register the saved state data unit.
102	*/
103	int rc = SSMR3RegisterInternal(pVM, "GIM", 0 /* uInstance */, GIM_SAVED_STATE_VERSION, sizeof(GIM),
104	NULL /* pfnLivePrep /, NULL / pfnLiveExec /, NULL / pfnLiveVote*/,
105	NULL /* pfnSavePrep /, gimR3Save, NULL / pfnSaveDone */,
106	NULL /* pfnLoadPrep /, gimR3Load, NULL / pfnLoadDone */);
107	if (RT_FAILURE(rc))
108	return rc;
109
110	/*
111	* Read configuration.
112	*/
113	PCFGMNODE pCfgNode = CFGMR3GetChild(CFGMR3GetRoot(pVM), "GIM/");
114
115	/*
116	* Validate the GIM settings.
117	*/
118	rc = CFGMR3ValidateConfig(pCfgNode, "/GIM/", /* pszNode */
119	"Provider" /* pszValidValues */
120	"\|Version",
121	"HyperV", /* pszValidNodes */
122	"GIM", /* pszWho */
123	0); /* uInstance */
124	if (RT_FAILURE(rc))
125	return rc;
126
127	/** @cfgm{/GIM/Provider, string}
128	* The name of the GIM provider. The default is "none". */
129	char szProvider[64];
130	rc = CFGMR3QueryStringDef(pCfgNode, "Provider", szProvider, sizeof(szProvider), "None");
131	AssertLogRelRCReturn(rc, rc);
132
133	/** @cfgm{/GIM/Version, uint32_t}
134	* The interface version. The default is 0, which means "provide the most
135	* up-to-date implementation". */
136	uint32_t uVersion;
137	rc = CFGMR3QueryU32Def(pCfgNode, "Version", &uVersion, 0 /* default */);
138	AssertLogRelRCReturn(rc, rc);
139
140	/*
141	* Setup the GIM provider for this VM.
142	*/
143	LogRel(("GIM: Using provider '%s' (Implementation version: %u)\n", szProvider, uVersion));
144	if (!RTStrCmp(szProvider, "None"))
145	pVM->gim.s.enmProviderId = GIMPROVIDERID_NONE;
146	else
147	{
148	pVM->gim.s.u32Version = uVersion;
149	/** @todo r=bird: Because u32Version is saved, it should be translated to the
150	* 'most up-to-date implementation' version number when 0. Otherwise,
151	* we'll have abiguities when loading the state of older VMs. */
152	if (!RTStrCmp(szProvider, "Minimal"))
153	{
154	pVM->gim.s.enmProviderId = GIMPROVIDERID_MINIMAL;
155	rc = gimR3MinimalInit(pVM);
156	}
157	else if (!RTStrCmp(szProvider, "HyperV"))
158	{
159	pVM->gim.s.enmProviderId = GIMPROVIDERID_HYPERV;
160	rc = gimR3HvInit(pVM, pCfgNode);
161	}
162	else if (!RTStrCmp(szProvider, "KVM"))
163	{
164	pVM->gim.s.enmProviderId = GIMPROVIDERID_KVM;
165	rc = gimR3KvmInit(pVM);
166	}
167	else
168	rc = VMR3SetError(pVM->pUVM, VERR_GIM_INVALID_PROVIDER, RT_SRC_POS, "Provider '%s' unknown.", szProvider);
169	}
170
171	/*
172	* Statistics.
173	*/
174	STAM_REL_REG_USED(pVM, &pVM->gim.s.StatDbgXmit, STAMTYPE_COUNTER, "/GIM/Debug/Transmit", STAMUNIT_OCCURENCES, "Debug packets sent.");
175	STAM_REL_REG_USED(pVM, &pVM->gim.s.StatDbgXmitBytes, STAMTYPE_COUNTER, "/GIM/Debug/TransmitBytes", STAMUNIT_OCCURENCES, "Debug bytes sent.");
176	STAM_REL_REG_USED(pVM, &pVM->gim.s.StatDbgRecv, STAMTYPE_COUNTER, "/GIM/Debug/Receive", STAMUNIT_OCCURENCES, "Debug packets received.");
177	STAM_REL_REG_USED(pVM, &pVM->gim.s.StatDbgRecvBytes, STAMTYPE_COUNTER, "/GIM/Debug/ReceiveBytes", STAMUNIT_OCCURENCES, "Debug bytes received.");
178
179	STAM_REL_REG_USED(pVM, &pVM->gim.s.StatHypercalls, STAMTYPE_COUNTER, "/GIM/Hypercalls", STAMUNIT_OCCURENCES, "Number of hypercalls initiated.");
180	return rc;
181	}
182
183
184	/**
185	* Initializes the remaining bits of the GIM provider.
186	*
187	* This is called after initializing HM and most other VMM components.
188	*
189	* @returns VBox status code.
190	* @param pVM The cross context VM structure.
191	* @thread EMT(0)
192	*/
193	VMMR3_INT_DECL(int) GIMR3InitCompleted(PVM pVM)
194	{
195	switch (pVM->gim.s.enmProviderId)
196	{
197	case GIMPROVIDERID_MINIMAL:
198	return gimR3MinimalInitCompleted(pVM);
199
200	case GIMPROVIDERID_HYPERV:
201	return gimR3HvInitCompleted(pVM);
202
203	case GIMPROVIDERID_KVM:
204	return gimR3KvmInitCompleted(pVM);
205
206	default:
207	break;
208	}
209
210	if (!TMR3CpuTickIsFixedRateMonotonic(pVM, true /* fWithParavirtEnabled */))
211	LogRel(("GIM: Warning!!! Host TSC is unstable. The guest may behave unpredictably with a paravirtualized clock.\n"));
212
213	return VINF_SUCCESS;
214	}
215
216
217	/**
218	* @callback_method_impl{FNSSMINTSAVEEXEC}
219	*/
220	static DECLCALLBACK(int) gimR3Save(PVM pVM, PSSMHANDLE pSSM)
221	{
222	AssertReturn(pVM, VERR_INVALID_PARAMETER);
223	AssertReturn(pSSM, VERR_SSM_INVALID_STATE);
224
225	/** @todo Save per-CPU data. */
226	int rc = VINF_SUCCESS;
227	#if 0
228	SSMR3PutU32(pSSM, pVM->cCpus);
229	for (VMCPUID i = 0; i < pVM->cCpus; i++)
230	{
231	rc = SSMR3PutXYZ(pSSM, pVM->aCpus[i].gim.s.XYZ);
232	}
233	#endif
234
235	/*
236	* Save per-VM data.
237	*/
238	SSMR3PutU32(pSSM, pVM->gim.s.enmProviderId);
239	SSMR3PutU32(pSSM, pVM->gim.s.u32Version);
240
241	/*
242	* Save provider-specific data.
243	*/
244	switch (pVM->gim.s.enmProviderId)
245	{
246	case GIMPROVIDERID_HYPERV:
247	rc = gimR3HvSave(pVM, pSSM);
248	AssertRCReturn(rc, rc);
249	break;
250
251	case GIMPROVIDERID_KVM:
252	rc = gimR3KvmSave(pVM, pSSM);
253	AssertRCReturn(rc, rc);
254	break;
255
256	default:
257	break;
258	}
259
260	return rc;
261	}
262
263
264	/**
265	* @callback_method_impl{FNSSMINTLOADEXEC}
266	*/
267	static DECLCALLBACK(int) gimR3Load(PVM pVM, PSSMHANDLE pSSM, uint32_t uVersion, uint32_t uPass)
268	{
269	if (uPass != SSM_PASS_FINAL)
270	return VINF_SUCCESS;
271	if (uVersion != GIM_SAVED_STATE_VERSION)
272	return VERR_SSM_UNSUPPORTED_DATA_UNIT_VERSION;
273
274	/** @todo Load per-CPU data. */
275	int rc;
276	#if 0
277	for (VMCPUID i = 0; i < pVM->cCpus; i++)
278	{
279	rc = SSMR3PutXYZ(pSSM, pVM->aCpus[i].gim.s.XYZ);
280	}
281	#endif
282
283	/*
284	* Load per-VM data.
285	*/
286	uint32_t uProviderId;
287	uint32_t uProviderVersion;
288
289	rc = SSMR3GetU32(pSSM, &uProviderId); AssertRCReturn(rc, rc);
290	rc = SSMR3GetU32(pSSM, &uProviderVersion); AssertRCReturn(rc, rc);
291
292	if ((GIMPROVIDERID)uProviderId != pVM->gim.s.enmProviderId)
293	return SSMR3SetCfgError(pSSM, RT_SRC_POS, N_("Saved GIM provider %u differs from the configured one (%u)."),
294	uProviderId, pVM->gim.s.enmProviderId);
295	#if 0 /** @todo r=bird: Figure out what you mean to do here with the version. */
296	if (uProviderVersion != pVM->gim.s.u32Version)
297	return SSMR3SetCfgError(pSSM, RT_SRC_POS, N_("Saved GIM provider version %u differs from the configured one (%u)."),
298	uProviderVersion, pVM->gim.s.u32Version);
299	#else
300	pVM->gim.s.u32Version = uProviderVersion;
301	#endif
302
303	/*
304	* Load provider-specific data.
305	*/
306	switch (pVM->gim.s.enmProviderId)
307	{
308	case GIMPROVIDERID_HYPERV:
309	rc = gimR3HvLoad(pVM, pSSM);
310	AssertRCReturn(rc, rc);
311	break;
312
313	case GIMPROVIDERID_KVM:
314	rc = gimR3KvmLoad(pVM, pSSM);
315	AssertRCReturn(rc, rc);
316	break;
317
318	default:
319	break;
320	}
321
322	return VINF_SUCCESS;
323	}
324
325
326	/**
327	* Terminates the GIM.
328	*
329	* Termination means cleaning up and freeing all resources,
330	* the VM itself is, at this point, powered off or suspended.
331	*
332	* @returns VBox status code.
333	* @param pVM The cross context VM structure.
334	*/
335	VMMR3_INT_DECL(int) GIMR3Term(PVM pVM)
336	{
337	switch (pVM->gim.s.enmProviderId)
338	{
339	case GIMPROVIDERID_HYPERV:
340	return gimR3HvTerm(pVM);
341
342	case GIMPROVIDERID_KVM:
343	return gimR3KvmTerm(pVM);
344
345	default:
346	break;
347	}
348	return VINF_SUCCESS;
349	}
350
351
352	/**
353	* The VM is being reset.
354	*
355	* For the GIM component this means unmapping and unregistering MMIO2 regions
356	* and other provider-specific resets.
357	*
358	* @returns VBox status code.
359	* @param pVM The cross context VM structure.
360	*/
361	VMMR3_INT_DECL(void) GIMR3Reset(PVM pVM)
362	{
363	switch (pVM->gim.s.enmProviderId)
364	{
365	case GIMPROVIDERID_HYPERV:
366	return gimR3HvReset(pVM);
367
368	case GIMPROVIDERID_KVM:
369	return gimR3KvmReset(pVM);
370
371	default:
372	break;
373	}
374	}
375
376
377	/**
378	* Registers the GIM device with VMM.
379	*
380	* @param pVM The cross context VM structure.
381	* @param pDevIns Pointer to the GIM device instance.
382	* @param pDbg Pointer to the GIM device debug structure, can be
383	* NULL.
384	*/
385	VMMR3DECL(void) GIMR3GimDeviceRegister(PVM pVM, PPDMDEVINS pDevIns, PGIMDEBUG pDbg)
386	{
387	pVM->gim.s.pDevInsR3 = pDevIns;
388	pVM->gim.s.pDbgR3 = pDbg;
389	}
390
391
392	/**
393	* Gets debug setup specified by the provider.
394	*
395	* @returns VBox status code.
396	* @param pVM The cross context VM structure.
397	* @param pDbgSetup Where to store the debug setup details.
398	*/
399	VMMR3DECL(int) GIMR3GetDebugSetup(PVM pVM, PGIMDEBUGSETUP pDbgSetup)
400	{
401	AssertReturn(pVM, VERR_INVALID_PARAMETER);
402	AssertReturn(pDbgSetup, VERR_INVALID_PARAMETER);
403
404	switch (pVM->gim.s.enmProviderId)
405	{
406	case GIMPROVIDERID_HYPERV:
407	return gimR3HvGetDebugSetup(pVM, pDbgSetup);
408	default:
409	break;
410	}
411	return VERR_GIM_NO_DEBUG_CONNECTION;
412	}
413
414
415	/**
416	* Read data from a host debug session.
417	*
418	* @returns VBox status code.
419	*
420	* @param pVM The cross context VM structure.
421	* @param pvRead The read buffer.
422	* @param pcbRead The size of the read buffer as well as where to store
423	* the number of bytes read.
424	* @param pfnReadComplete Callback when the buffer has been read and
425	* before signaling reading of the next buffer.
426	* Optional, can be NULL.
427	* @thread EMT.
428	*/
429	VMMR3_INT_DECL(int) gimR3DebugRead(PVM pVM, void pvRead, size_t pcbRead, PFNGIMDEBUGBUFREADCOMPLETED pfnReadComplete)
430	{
431	PGIMDEBUG pDbg = pVM->gim.s.pDbgR3;
432	if (pDbg)
433	{
434	if (ASMAtomicReadBool(&pDbg->fDbgRecvBufRead) == true)
435	{
436	STAM_REL_COUNTER_INC(&pVM->gim.s.StatDbgRecv);
437	STAM_REL_COUNTER_ADD(&pVM->gim.s.StatDbgRecvBytes, pDbg->cbDbgRecvBufRead);
438
439	memcpy(pvRead, pDbg->pvDbgRecvBuf, pDbg->cbDbgRecvBufRead);
440	*pcbRead = pDbg->cbDbgRecvBufRead;
441	if (pfnReadComplete)
442	pfnReadComplete(pVM);
443	RTSemEventMultiSignal(pDbg->hDbgRecvThreadSem);
444	ASMAtomicWriteBool(&pDbg->fDbgRecvBufRead, false);
445	return VINF_SUCCESS;
446	}
447	else
448	*pcbRead = 0;
449	return VERR_NO_DATA;
450	}
451	return VERR_GIM_NO_DEBUG_CONNECTION;
452	}
453
454
455	/**
456	* Write data to a host debug session.
457	*
458	* @returns VBox status code.
459	*
460	* @param pVM The cross context VM structure.
461	* @param pvWrite The write buffer.
462	* @param pcbWrite The size of the write buffer as well as where to store
463	* the number of bytes written.
464	* @thread EMT.
465	*/
466	VMMR3_INT_DECL(int) gimR3DebugWrite(PVM pVM, void pvWrite, size_t pcbWrite)
467	{
468	PGIMDEBUG pDbg = pVM->gim.s.pDbgR3;
469	if (pDbg)
470	{
471	PPDMISTREAM pDbgStream = pDbg->pDbgDrvStream;
472	if (pDbgStream)
473	{
474	size_t cbWrite = *pcbWrite;
475	int rc = pDbgStream->pfnWrite(pDbgStream, pvWrite, pcbWrite);
476	if ( RT_SUCCESS(rc)
477	&& *pcbWrite == cbWrite)
478	{
479	STAM_REL_COUNTER_INC(&pVM->gim.s.StatDbgXmit);
480	STAM_REL_COUNTER_ADD(&pVM->gim.s.StatDbgXmitBytes, *pcbWrite);
481	}
482	return rc;
483	}
484	}
485	return VERR_GIM_NO_DEBUG_CONNECTION;
486	}
487
488
489	/**
490	* Returns the array of MMIO2 regions that are expected to be registered and
491	* later mapped into the guest-physical address space for the GIM provider
492	* configured for the VM.
493	*
494	* @returns Pointer to an array of GIM MMIO2 regions, may return NULL.
495	* @param pVM The cross context VM structure.
496	* @param pcRegions Where to store the number of items in the array.
497	*
498	* @remarks The caller does not own and therefore must -NOT- try to free the
499	* returned pointer.
500	*/
501	VMMR3DECL(PGIMMMIO2REGION) GIMR3GetMmio2Regions(PVM pVM, uint32_t *pcRegions)
502	{
503	Assert(pVM);
504	Assert(pcRegions);
505
506	*pcRegions = 0;
507	switch (pVM->gim.s.enmProviderId)
508	{
509	case GIMPROVIDERID_HYPERV:
510	return gimR3HvGetMmio2Regions(pVM, pcRegions);
511
512	default:
513	break;
514	}
515
516	return NULL;
517	}
518
519	#if 0 /* ??? */
520
521	/**
522	* @callback_method_impl{FNPGMPHYSHANDLER,
523	* Write access handler for mapped MMIO2 pages. Currently ignores writes.}
524	*
525	* @todo In the future we might want to let the GIM provider decide what the
526	* handler should do (like throwing \#GP faults).
527	*/
528	static DECLCALLBACK(VBOXSTRICTRC) gimR3Mmio2WriteHandler(PVM pVM, PVMCPU pVCpu, RTGCPHYS GCPhys, void pvPhys, void pvBuf,
529	size_t cbBuf, PGMACCESSTYPE enmAccessType, PGMACCESSORIGIN enmOrigin,
530	void *pvUser)
531	{
532	RT_NOREF6(pVM, pVCpu, GCPhys, pvPhys, pvBuf, cbBuf);
533	RT_NOREF3(enmAccessType, enmOrigin, pvUser);
534
535	/*
536	* Ignore writes to the mapped MMIO2 page.
537	*/
538	Assert(enmAccessType == PGMACCESSTYPE_WRITE);
539	return VINF_SUCCESS; /** @todo Hyper-V says we should \#GP(0) fault for writes to the Hypercall and TSC page. */
540	}
541
542
543	/**
544	* Unmaps a registered MMIO2 region in the guest address space and removes any
545	* access handlers for it.
546	*
547	* @returns VBox status code.
548	* @param pVM The cross context VM structure.
549	* @param pRegion Pointer to the GIM MMIO2 region.
550	*/
551	VMMR3_INT_DECL(int) gimR3Mmio2Unmap(PVM pVM, PGIMMMIO2REGION pRegion)
552	{
553	AssertPtr(pVM);
554	AssertPtr(pRegion);
555
556	PPDMDEVINS pDevIns = pVM->gim.s.pDevInsR3;
557	AssertPtr(pDevIns);
558	if (pRegion->fMapped)
559	{
560	int rc = PGMHandlerPhysicalDeregister(pVM, pRegion->GCPhysPage);
561	AssertRC(rc);
562
563	rc = PDMDevHlpMMIO2Unmap(pDevIns, pRegion->iRegion, pRegion->GCPhysPage);
564	if (RT_SUCCESS(rc))
565	{
566	pRegion->fMapped = false;
567	pRegion->GCPhysPage = NIL_RTGCPHYS;
568	}
569	}
570	return VINF_SUCCESS;
571	}
572
573
574	/**
575	* Maps a registered MMIO2 region in the guest address space.
576	*
577	* The region will be made read-only and writes from the guest will be ignored.
578	*
579	* @returns VBox status code.
580	* @param pVM The cross context VM structure.
581	* @param pRegion Pointer to the GIM MMIO2 region.
582	* @param GCPhysRegion Where in the guest address space to map the region.
583	*/
584	VMMR3_INT_DECL(int) GIMR3Mmio2Map(PVM pVM, PGIMMMIO2REGION pRegion, RTGCPHYS GCPhysRegion)
585	{
586	PPDMDEVINS pDevIns = pVM->gim.s.pDevInsR3;
587	AssertPtr(pDevIns);
588
589	/* The guest-physical address must be page-aligned. */
590	if (GCPhysRegion & PAGE_OFFSET_MASK)
591	{
592	LogFunc(("%s: %#RGp not paging aligned\n", pRegion->szDescription, GCPhysRegion));
593	return VERR_PGM_INVALID_GC_PHYSICAL_ADDRESS;
594	}
595
596	/* Allow only normal pages to be overlaid using our MMIO2 pages (disallow MMIO, ROM, reserved pages). */
597	/** @todo Hyper-V doesn't seem to be very strict about this, may be relax
598	* later if some guest really requires it. */
599	if (!PGMPhysIsGCPhysNormal(pVM, GCPhysRegion))
600	{
601	LogFunc(("%s: %#RGp is not normal memory\n", pRegion->szDescription, GCPhysRegion));
602	return VERR_PGM_INVALID_GC_PHYSICAL_ADDRESS;
603	}
604
605	if (!pRegion->fRegistered)
606	{
607	LogFunc(("%s: Region has not been registered.\n", pRegion->szDescription));
608	return VERR_GIM_IPE_1;
609	}
610
611	/*
612	* Map the MMIO2 region over the specified guest-physical address.
613	*/
614	int rc = PDMDevHlpMMIO2Map(pDevIns, pRegion->iRegion, GCPhysRegion);
615	if (RT_SUCCESS(rc))
616	{
617	/*
618	* Install access-handlers for the mapped page to prevent (ignore) writes to it
619	* from the guest.
620	*/
621	if (pVM->gim.s.hSemiReadOnlyMmio2Handler == NIL_PGMPHYSHANDLERTYPE)
622	rc = PGMR3HandlerPhysicalTypeRegister(pVM, PGMPHYSHANDLERKIND_WRITE,
623	gimR3Mmio2WriteHandler,
624	NULL /* pszModR0 /, NULL / pszHandlerR0 /, NULL / pszPfHandlerR0 */,
625	NULL /* pszModRC /, NULL / pszHandlerRC /, NULL / pszPfHandlerRC */,
626	"GIM read-only MMIO2 handler",
627	&pVM->gim.s.hSemiReadOnlyMmio2Handler);
628	if (RT_SUCCESS(rc))
629	{
630	rc = PGMHandlerPhysicalRegister(pVM, GCPhysRegion, GCPhysRegion + (pRegion->cbRegion - 1),
631	pVM->gim.s.hSemiReadOnlyMmio2Handler,
632	NULL /* pvUserR3 /, NIL_RTR0PTR / pvUserR0 /, NIL_RTRCPTR / pvUserRC */,
633	pRegion->szDescription);
634	if (RT_SUCCESS(rc))
635	{
636	pRegion->fMapped = true;
637	pRegion->GCPhysPage = GCPhysRegion;
638	return rc;
639	}
640	}
641
642	PDMDevHlpMMIO2Unmap(pDevIns, pRegion->iRegion, GCPhysRegion);
643	}
644
645	return rc;
646	}
647
648
649	/**
650	* Registers the physical handler for the registered and mapped MMIO2 region.
651	*
652	* @returns VBox status code.
653	* @param pVM The cross context VM structure.
654	* @param pRegion Pointer to the GIM MMIO2 region.
655	*/
656	VMMR3_INT_DECL(int) gimR3Mmio2HandlerPhysicalRegister(PVM pVM, PGIMMMIO2REGION pRegion)
657	{
658	AssertPtr(pRegion);
659	AssertReturn(pRegion->fRegistered, VERR_GIM_IPE_2);
660	AssertReturn(pRegion->fMapped, VERR_GIM_IPE_3);
661
662	return PGMR3HandlerPhysicalRegister(pVM,
663	PGMPHYSHANDLERKIND_WRITE,
664	pRegion->GCPhysPage, pRegion->GCPhysPage + (pRegion->cbRegion - 1),
665	gimR3Mmio2WriteHandler, NULL /* pvUserR3 */,
666	NULL /* pszModR0 /, NULL / pszHandlerR0 /, NIL_RTR0PTR / pvUserR0 */,
667	NULL /* pszModRC /, NULL / pszHandlerRC /, NIL_RTRCPTR / pvUserRC */,
668	pRegion->szDescription);
669	}
670
671
672	/**
673	* Deregisters the physical handler for the MMIO2 region.
674	*
675	* @returns VBox status code.
676	* @param pVM The cross context VM structure.
677	* @param pRegion Pointer to the GIM MMIO2 region.
678	*/
679	VMMR3_INT_DECL(int) gimR3Mmio2HandlerPhysicalDeregister(PVM pVM, PGIMMMIO2REGION pRegion)
680	{
681	return PGMHandlerPhysicalDeregister(pVM, pRegion->GCPhysPage);
682	}
683
684	#endif
685

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source: vbox/trunk/src/VBox/VMM/VMMR3/GIM.cpp@ 63465

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