GIM.cpp@ 62478

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(C) 2016
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1	/* $Id: GIM.cpp 62478 2016-07-22 18:29:06Z 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	static FNPGMPHYSHANDLER gimR3Mmio2WriteHandler;
78
79
80	/**
81	* Initializes the GIM.
82	*
83	* @returns VBox status code.
84	* @param pVM The cross context VM structure.
85	*/
86	VMMR3_INT_DECL(int) GIMR3Init(PVM pVM)
87	{
88	LogFlow(("GIMR3Init\n"));
89
90	/*
91	* Assert alignment and sizes.
92	*/
93	AssertCompile(sizeof(pVM->gim.s) <= sizeof(pVM->gim.padding));
94	AssertCompile(sizeof(pVM->aCpus[0].gim.s) <= sizeof(pVM->aCpus[0].gim.padding));
95
96	/*
97	* Initialize members.
98	*/
99	pVM->gim.s.hSemiReadOnlyMmio2Handler = NIL_PGMPHYSHANDLERTYPE;
100
101	/*
102	* Register the saved state data unit.
103	*/
104	int rc = SSMR3RegisterInternal(pVM, "GIM", 0 /* uInstance */, GIM_SAVED_STATE_VERSION, sizeof(GIM),
105	NULL /* pfnLivePrep /, NULL / pfnLiveExec /, NULL / pfnLiveVote*/,
106	NULL /* pfnSavePrep /, gimR3Save, NULL / pfnSaveDone */,
107	NULL /* pfnLoadPrep /, gimR3Load, NULL / pfnLoadDone */);
108	if (RT_FAILURE(rc))
109	return rc;
110
111	/*
112	* Read configuration.
113	*/
114	PCFGMNODE pCfgNode = CFGMR3GetChild(CFGMR3GetRoot(pVM), "GIM/");
115
116	/*
117	* Validate the GIM settings.
118	*/
119	rc = CFGMR3ValidateConfig(pCfgNode, "/GIM/", /* pszNode */
120	"Provider" /* pszValidValues */
121	"\|Version",
122	"HyperV", /* pszValidNodes */
123	"GIM", /* pszWho */
124	0); /* uInstance */
125	if (RT_FAILURE(rc))
126	return rc;
127
128	/** @cfgm{/GIM/Provider, string}
129	* The name of the GIM provider. The default is "none". */
130	char szProvider[64];
131	rc = CFGMR3QueryStringDef(pCfgNode, "Provider", szProvider, sizeof(szProvider), "None");
132	AssertLogRelRCReturn(rc, rc);
133
134	/** @cfgm{/GIM/Version, uint32_t}
135	* The interface version. The default is 0, which means "provide the most
136	* up-to-date implementation". */
137	uint32_t uVersion;
138	rc = CFGMR3QueryU32Def(pCfgNode, "Version", &uVersion, 0 /* default */);
139	AssertLogRelRCReturn(rc, rc);
140
141	/*
142	* Setup the GIM provider for this VM.
143	*/
144	LogRel(("GIM: Using provider '%s' (Implementation version: %u)\n", szProvider, uVersion));
145	if (!RTStrCmp(szProvider, "None"))
146	pVM->gim.s.enmProviderId = GIMPROVIDERID_NONE;
147	else
148	{
149	pVM->gim.s.u32Version = uVersion;
150	/** @todo r=bird: Because u32Version is saved, it should be translated to the
151	* 'most up-to-date implementation' version number when 0. Otherwise,
152	* we'll have abiguities when loading the state of older VMs. */
153	if (!RTStrCmp(szProvider, "Minimal"))
154	{
155	pVM->gim.s.enmProviderId = GIMPROVIDERID_MINIMAL;
156	rc = gimR3MinimalInit(pVM);
157	}
158	else if (!RTStrCmp(szProvider, "HyperV"))
159	{
160	pVM->gim.s.enmProviderId = GIMPROVIDERID_HYPERV;
161	rc = gimR3HvInit(pVM, pCfgNode);
162	}
163	else if (!RTStrCmp(szProvider, "KVM"))
164	{
165	pVM->gim.s.enmProviderId = GIMPROVIDERID_KVM;
166	rc = gimR3KvmInit(pVM);
167	}
168	else
169	rc = VMR3SetError(pVM->pUVM, VERR_GIM_INVALID_PROVIDER, RT_SRC_POS, "Provider '%s' unknown.", szProvider);
170	}
171
172	/*
173	* Statistics.
174	*/
175	STAM_REL_REG_USED(pVM, &pVM->gim.s.StatDbgXmit, STAMTYPE_COUNTER, "/GIM/Debug/Transmit", STAMUNIT_OCCURENCES, "Debug packets sent.");
176	STAM_REL_REG_USED(pVM, &pVM->gim.s.StatDbgXmitBytes, STAMTYPE_COUNTER, "/GIM/Debug/TransmitBytes", STAMUNIT_OCCURENCES, "Debug bytes sent.");
177	STAM_REL_REG_USED(pVM, &pVM->gim.s.StatDbgRecv, STAMTYPE_COUNTER, "/GIM/Debug/Receive", STAMUNIT_OCCURENCES, "Debug packets received.");
178	STAM_REL_REG_USED(pVM, &pVM->gim.s.StatDbgRecvBytes, STAMTYPE_COUNTER, "/GIM/Debug/ReceiveBytes", STAMUNIT_OCCURENCES, "Debug bytes received.");
179
180	STAM_REL_REG_USED(pVM, &pVM->gim.s.StatHypercalls, STAMTYPE_COUNTER, "/GIM/Hypercalls", STAMUNIT_OCCURENCES, "Number of hypercalls initiated.");
181	return rc;
182	}
183
184
185	/**
186	* Initializes the remaining bits of the GIM provider.
187	*
188	* This is called after initializing HM and most other VMM components.
189	*
190	* @returns VBox status code.
191	* @param pVM The cross context VM structure.
192	* @thread EMT(0)
193	*/
194	VMMR3_INT_DECL(int) GIMR3InitCompleted(PVM pVM)
195	{
196	switch (pVM->gim.s.enmProviderId)
197	{
198	case GIMPROVIDERID_MINIMAL:
199	return gimR3MinimalInitCompleted(pVM);
200
201	case GIMPROVIDERID_HYPERV:
202	return gimR3HvInitCompleted(pVM);
203
204	case GIMPROVIDERID_KVM:
205	return gimR3KvmInitCompleted(pVM);
206
207	default:
208	break;
209	}
210
211	if (!TMR3CpuTickIsFixedRateMonotonic(pVM, true /* fWithParavirtEnabled */))
212	LogRel(("GIM: Warning!!! Host TSC is unstable. The guest may behave unpredictably with a paravirtualized clock.\n"));
213
214	return VINF_SUCCESS;
215	}
216
217
218	/**
219	* @callback_method_impl{FNSSMINTSAVEEXEC}
220	*/
221	static DECLCALLBACK(int) gimR3Save(PVM pVM, PSSMHANDLE pSSM)
222	{
223	AssertReturn(pVM, VERR_INVALID_PARAMETER);
224	AssertReturn(pSSM, VERR_SSM_INVALID_STATE);
225
226	/** @todo Save per-CPU data. */
227	int rc = VINF_SUCCESS;
228	#if 0
229	SSMR3PutU32(pSSM, pVM->cCpus);
230	for (VMCPUID i = 0; i < pVM->cCpus; i++)
231	{
232	rc = SSMR3PutXYZ(pSSM, pVM->aCpus[i].gim.s.XYZ);
233	}
234	#endif
235
236	/*
237	* Save per-VM data.
238	*/
239	SSMR3PutU32(pSSM, pVM->gim.s.enmProviderId);
240	SSMR3PutU32(pSSM, pVM->gim.s.u32Version);
241
242	/*
243	* Save provider-specific data.
244	*/
245	switch (pVM->gim.s.enmProviderId)
246	{
247	case GIMPROVIDERID_HYPERV:
248	rc = gimR3HvSave(pVM, pSSM);
249	AssertRCReturn(rc, rc);
250	break;
251
252	case GIMPROVIDERID_KVM:
253	rc = gimR3KvmSave(pVM, pSSM);
254	AssertRCReturn(rc, rc);
255	break;
256
257	default:
258	break;
259	}
260
261	return rc;
262	}
263
264
265	/**
266	* @callback_method_impl{FNSSMINTLOADEXEC}
267	*/
268	static DECLCALLBACK(int) gimR3Load(PVM pVM, PSSMHANDLE pSSM, uint32_t uVersion, uint32_t uPass)
269	{
270	if (uPass != SSM_PASS_FINAL)
271	return VINF_SUCCESS;
272	if (uVersion != GIM_SAVED_STATE_VERSION)
273	return VERR_SSM_UNSUPPORTED_DATA_UNIT_VERSION;
274
275	/** @todo Load per-CPU data. */
276	int rc;
277	#if 0
278	for (VMCPUID i = 0; i < pVM->cCpus; i++)
279	{
280	rc = SSMR3PutXYZ(pSSM, pVM->aCpus[i].gim.s.XYZ);
281	}
282	#endif
283
284	/*
285	* Load per-VM data.
286	*/
287	uint32_t uProviderId;
288	uint32_t uProviderVersion;
289
290	rc = SSMR3GetU32(pSSM, &uProviderId); AssertRCReturn(rc, rc);
291	rc = SSMR3GetU32(pSSM, &uProviderVersion); AssertRCReturn(rc, rc);
292
293	if ((GIMPROVIDERID)uProviderId != pVM->gim.s.enmProviderId)
294	return SSMR3SetCfgError(pSSM, RT_SRC_POS, N_("Saved GIM provider %u differs from the configured one (%u)."),
295	uProviderId, pVM->gim.s.enmProviderId);
296	#if 0 /** @todo r=bird: Figure out what you mean to do here with the version. */
297	if (uProviderVersion != pVM->gim.s.u32Version)
298	return SSMR3SetCfgError(pSSM, RT_SRC_POS, N_("Saved GIM provider version %u differs from the configured one (%u)."),
299	uProviderVersion, pVM->gim.s.u32Version);
300	#else
301	pVM->gim.s.u32Version = uProviderVersion;
302	#endif
303
304	/*
305	* Load provider-specific data.
306	*/
307	switch (pVM->gim.s.enmProviderId)
308	{
309	case GIMPROVIDERID_HYPERV:
310	rc = gimR3HvLoad(pVM, pSSM, uVersion);
311	AssertRCReturn(rc, rc);
312	break;
313
314	case GIMPROVIDERID_KVM:
315	rc = gimR3KvmLoad(pVM, pSSM, uVersion);
316	AssertRCReturn(rc, rc);
317	break;
318
319	default:
320	break;
321	}
322
323	return VINF_SUCCESS;
324	}
325
326
327	/**
328	* Terminates the GIM.
329	*
330	* Termination means cleaning up and freeing all resources,
331	* the VM itself is, at this point, powered off or suspended.
332	*
333	* @returns VBox status code.
334	* @param pVM The cross context VM structure.
335	*/
336	VMMR3_INT_DECL(int) GIMR3Term(PVM pVM)
337	{
338	switch (pVM->gim.s.enmProviderId)
339	{
340	case GIMPROVIDERID_HYPERV:
341	return gimR3HvTerm(pVM);
342
343	case GIMPROVIDERID_KVM:
344	return gimR3KvmTerm(pVM);
345
346	default:
347	break;
348	}
349	return VINF_SUCCESS;
350	}
351
352
353	/**
354	* The VM is being reset.
355	*
356	* For the GIM component this means unmapping and unregistering MMIO2 regions
357	* and other provider-specific resets.
358	*
359	* @returns VBox status code.
360	* @param pVM The cross context VM structure.
361	*/
362	VMMR3_INT_DECL(void) GIMR3Reset(PVM pVM)
363	{
364	switch (pVM->gim.s.enmProviderId)
365	{
366	case GIMPROVIDERID_HYPERV:
367	return gimR3HvReset(pVM);
368
369	case GIMPROVIDERID_KVM:
370	return gimR3KvmReset(pVM);
371
372	default:
373	break;
374	}
375	}
376
377
378	/**
379	* Registers the GIM device with VMM.
380	*
381	* @param pVM The cross context VM structure.
382	* @param pDevIns Pointer to the GIM device instance.
383	* @param pDbg Pointer to the GIM device debug structure, can be
384	* NULL.
385	*/
386	VMMR3DECL(void) GIMR3GimDeviceRegister(PVM pVM, PPDMDEVINS pDevIns, PGIMDEBUG pDbg)
387	{
388	pVM->gim.s.pDevInsR3 = pDevIns;
389	pVM->gim.s.pDbgR3 = pDbg;
390	}
391
392
393	/**
394	* Gets debug setup specified by the provider.
395	*
396	* @returns VBox status code.
397	* @param pVM The cross context VM structure.
398	* @param pDbgSetup Where to store the debug setup details.
399	*/
400	VMMR3DECL(int) GIMR3GetDebugSetup(PVM pVM, PGIMDEBUGSETUP pDbgSetup)
401	{
402	AssertReturn(pVM, VERR_INVALID_PARAMETER);
403	AssertReturn(pDbgSetup, VERR_INVALID_PARAMETER);
404
405	switch (pVM->gim.s.enmProviderId)
406	{
407	case GIMPROVIDERID_HYPERV:
408	return gimR3HvGetDebugSetup(pVM, pDbgSetup);
409	default:
410	break;
411	}
412	return VERR_GIM_NO_DEBUG_CONNECTION;
413	}
414
415
416	/**
417	* Read data from a host debug session.
418	*
419	* @returns VBox status code.
420	*
421	* @param pVM The cross context VM structure.
422	* @param pvRead The read buffer.
423	* @param pcbRead The size of the read buffer as well as where to store
424	* the number of bytes read.
425	* @param pfnReadComplete Callback when the buffer has been read and
426	* before signaling reading of the next buffer.
427	* Optional, can be NULL.
428	* @thread EMT.
429	*/
430	VMMR3_INT_DECL(int) gimR3DebugRead(PVM pVM, void pvRead, size_t pcbRead, PFNGIMDEBUGBUFREADCOMPLETED pfnReadComplete)
431	{
432	PGIMDEBUG pDbg = pVM->gim.s.pDbgR3;
433	if (pDbg)
434	{
435	if (ASMAtomicReadBool(&pDbg->fDbgRecvBufRead) == true)
436	{
437	STAM_REL_COUNTER_INC(&pVM->gim.s.StatDbgRecv);
438	STAM_REL_COUNTER_ADD(&pVM->gim.s.StatDbgRecvBytes, pDbg->cbDbgRecvBufRead);
439
440	memcpy(pvRead, pDbg->pvDbgRecvBuf, pDbg->cbDbgRecvBufRead);
441	*pcbRead = pDbg->cbDbgRecvBufRead;
442	if (pfnReadComplete)
443	pfnReadComplete(pVM);
444	RTSemEventMultiSignal(pDbg->hDbgRecvThreadSem);
445	ASMAtomicWriteBool(&pDbg->fDbgRecvBufRead, false);
446	return VINF_SUCCESS;
447	}
448	else
449	*pcbRead = 0;
450	return VERR_NO_DATA;
451	}
452	return VERR_GIM_NO_DEBUG_CONNECTION;
453	}
454
455
456	/**
457	* Write data to a host debug session.
458	*
459	* @returns VBox status code.
460	*
461	* @param pVM The cross context VM structure.
462	* @param pvWrite The write buffer.
463	* @param pcbWrite The size of the write buffer as well as where to store
464	* the number of bytes written.
465	* @thread EMT.
466	*/
467	VMMR3_INT_DECL(int) gimR3DebugWrite(PVM pVM, void pvWrite, size_t pcbWrite)
468	{
469	PGIMDEBUG pDbg = pVM->gim.s.pDbgR3;
470	if (pDbg)
471	{
472	PPDMISTREAM pDbgStream = pDbg->pDbgDrvStream;
473	if (pDbgStream)
474	{
475	size_t cbWrite = *pcbWrite;
476	int rc = pDbgStream->pfnWrite(pDbgStream, pvWrite, pcbWrite);
477	if ( RT_SUCCESS(rc)
478	&& *pcbWrite == cbWrite)
479	{
480	STAM_REL_COUNTER_INC(&pVM->gim.s.StatDbgXmit);
481	STAM_REL_COUNTER_ADD(&pVM->gim.s.StatDbgXmitBytes, *pcbWrite);
482	}
483	return rc;
484	}
485	}
486	return VERR_GIM_NO_DEBUG_CONNECTION;
487	}
488
489
490	/**
491	* Returns the array of MMIO2 regions that are expected to be registered and
492	* later mapped into the guest-physical address space for the GIM provider
493	* configured for the VM.
494	*
495	* @returns Pointer to an array of GIM MMIO2 regions, may return NULL.
496	* @param pVM The cross context VM structure.
497	* @param pcRegions Where to store the number of items in the array.
498	*
499	* @remarks The caller does not own and therefore must -NOT- try to free the
500	* returned pointer.
501	*/
502	VMMR3DECL(PGIMMMIO2REGION) GIMR3GetMmio2Regions(PVM pVM, uint32_t *pcRegions)
503	{
504	Assert(pVM);
505	Assert(pcRegions);
506
507	*pcRegions = 0;
508	switch (pVM->gim.s.enmProviderId)
509	{
510	case GIMPROVIDERID_HYPERV:
511	return gimR3HvGetMmio2Regions(pVM, pcRegions);
512
513	default:
514	break;
515	}
516
517	return NULL;
518	}
519
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	/*
533	* Ignore writes to the mapped MMIO2 page.
534	*/
535	Assert(enmAccessType == PGMACCESSTYPE_WRITE);
536	return VINF_SUCCESS; /** @todo Hyper-V says we should \#GP(0) fault for writes to the Hypercall and TSC page. */
537	}
538
539
540	#if 0
541	/**
542	* Unmaps a registered MMIO2 region in the guest address space and removes any
543	* access handlers for it.
544	*
545	* @returns VBox status code.
546	* @param pVM The cross context VM structure.
547	* @param pRegion Pointer to the GIM MMIO2 region.
548	*/
549	VMMR3_INT_DECL(int) gimR3Mmio2Unmap(PVM pVM, PGIMMMIO2REGION pRegion)
550	{
551	AssertPtr(pVM);
552	AssertPtr(pRegion);
553
554	PPDMDEVINS pDevIns = pVM->gim.s.pDevInsR3;
555	AssertPtr(pDevIns);
556	if (pRegion->fMapped)
557	{
558	int rc = PGMHandlerPhysicalDeregister(pVM, pRegion->GCPhysPage);
559	AssertRC(rc);
560
561	rc = PDMDevHlpMMIO2Unmap(pDevIns, pRegion->iRegion, pRegion->GCPhysPage);
562	if (RT_SUCCESS(rc))
563	{
564	pRegion->fMapped = false;
565	pRegion->GCPhysPage = NIL_RTGCPHYS;
566	}
567	}
568	return VINF_SUCCESS;
569	}
570
571
572	/**
573	* Maps a registered MMIO2 region in the guest address space.
574	*
575	* The region will be made read-only and writes from the guest will be ignored.
576	*
577	* @returns VBox status code.
578	* @param pVM The cross context VM structure.
579	* @param pRegion Pointer to the GIM MMIO2 region.
580	* @param GCPhysRegion Where in the guest address space to map the region.
581	*/
582	VMMR3_INT_DECL(int) GIMR3Mmio2Map(PVM pVM, PGIMMMIO2REGION pRegion, RTGCPHYS GCPhysRegion)
583	{
584	PPDMDEVINS pDevIns = pVM->gim.s.pDevInsR3;
585	AssertPtr(pDevIns);
586
587	/* The guest-physical address must be page-aligned. */
588	if (GCPhysRegion & PAGE_OFFSET_MASK)
589	{
590	LogFunc(("%s: %#RGp not paging aligned\n", pRegion->szDescription, GCPhysRegion));
591	return VERR_PGM_INVALID_GC_PHYSICAL_ADDRESS;
592	}
593
594	/* Allow only normal pages to be overlaid using our MMIO2 pages (disallow MMIO, ROM, reserved pages). */
595	/** @todo Hyper-V doesn't seem to be very strict about this, may be relax
596	* later if some guest really requires it. */
597	if (!PGMPhysIsGCPhysNormal(pVM, GCPhysRegion))
598	{
599	LogFunc(("%s: %#RGp is not normal memory\n", pRegion->szDescription, GCPhysRegion));
600	return VERR_PGM_INVALID_GC_PHYSICAL_ADDRESS;
601	}
602
603	if (!pRegion->fRegistered)
604	{
605	LogFunc(("%s: Region has not been registered.\n", pRegion->szDescription));
606	return VERR_GIM_IPE_1;
607	}
608
609	/*
610	* Map the MMIO2 region over the specified guest-physical address.
611	*/
612	int rc = PDMDevHlpMMIO2Map(pDevIns, pRegion->iRegion, GCPhysRegion);
613	if (RT_SUCCESS(rc))
614	{
615	/*
616	* Install access-handlers for the mapped page to prevent (ignore) writes to it
617	* from the guest.
618	*/
619	if (pVM->gim.s.hSemiReadOnlyMmio2Handler == NIL_PGMPHYSHANDLERTYPE)
620	rc = PGMR3HandlerPhysicalTypeRegister(pVM, PGMPHYSHANDLERKIND_WRITE,
621	gimR3Mmio2WriteHandler,
622	NULL /* pszModR0 /, NULL / pszHandlerR0 /, NULL / pszPfHandlerR0 */,
623	NULL /* pszModRC /, NULL / pszHandlerRC /, NULL / pszPfHandlerRC */,
624	"GIM read-only MMIO2 handler",
625	&pVM->gim.s.hSemiReadOnlyMmio2Handler);
626	if (RT_SUCCESS(rc))
627	{
628	rc = PGMHandlerPhysicalRegister(pVM, GCPhysRegion, GCPhysRegion + (pRegion->cbRegion - 1),
629	pVM->gim.s.hSemiReadOnlyMmio2Handler,
630	NULL /* pvUserR3 /, NIL_RTR0PTR / pvUserR0 /, NIL_RTRCPTR / pvUserRC */,
631	pRegion->szDescription);
632	if (RT_SUCCESS(rc))
633	{
634	pRegion->fMapped = true;
635	pRegion->GCPhysPage = GCPhysRegion;
636	return rc;
637	}
638	}
639
640	PDMDevHlpMMIO2Unmap(pDevIns, pRegion->iRegion, GCPhysRegion);
641	}
642
643	return rc;
644	}
645
646
647	/**
648	* Registers the physical handler for the registered and mapped MMIO2 region.
649	*
650	* @returns VBox status code.
651	* @param pVM The cross context VM structure.
652	* @param pRegion Pointer to the GIM MMIO2 region.
653	*/
654	VMMR3_INT_DECL(int) gimR3Mmio2HandlerPhysicalRegister(PVM pVM, PGIMMMIO2REGION pRegion)
655	{
656	AssertPtr(pRegion);
657	AssertReturn(pRegion->fRegistered, VERR_GIM_IPE_2);
658	AssertReturn(pRegion->fMapped, VERR_GIM_IPE_3);
659
660	return PGMR3HandlerPhysicalRegister(pVM,
661	PGMPHYSHANDLERKIND_WRITE,
662	pRegion->GCPhysPage, pRegion->GCPhysPage + (pRegion->cbRegion - 1),
663	gimR3Mmio2WriteHandler, NULL /* pvUserR3 */,
664	NULL /* pszModR0 /, NULL / pszHandlerR0 /, NIL_RTR0PTR / pvUserR0 */,
665	NULL /* pszModRC /, NULL / pszHandlerRC /, NIL_RTRCPTR / pvUserRC */,
666	pRegion->szDescription);
667	}
668
669
670	/**
671	* Deregisters the physical handler for the MMIO2 region.
672	*
673	* @returns VBox status code.
674	* @param pVM The cross context VM structure.
675	* @param pRegion Pointer to the GIM MMIO2 region.
676	*/
677	VMMR3_INT_DECL(int) gimR3Mmio2HandlerPhysicalDeregister(PVM pVM, PGIMMMIO2REGION pRegion)
678	{
679	return PGMHandlerPhysicalDeregister(pVM, pRegion->GCPhysPage);
680	}
681	#endif
682

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source: vbox/trunk/src/VBox/VMM/VMMR3/GIM.cpp@ 62478

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