GIM.cpp@ 53404

Last change on this file since 53404 was 52767, checked in by vboxsync, 10 years ago
VMM/GIM: Get rid of separate fEnabled field, just use the provider to figure out whether it's enabled or not.
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1	/* $Id: GIM.cpp 52767 2014-09-16 16:51:51Z vboxsync $ */
2	/** @file
3	* GIM - Guest Interface Manager.
4	*/
5
6	/*
7	* Copyright (C) 2014 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	* If the GIM provider configured for the VM needs to be recognized by the guest
33	* OS inorder to make use of features supported by the interface. Since it
34	* requires co-operation from the guest OS, a GIM provider is also referred to
35	* as a paravirtualization interface.
36	*
37	* One of the ideas behind this, is primarily for making guests more accurate
38	* and efficient when operating in a virtualized environment. For instance, a
39	* guest OS which interfaces to VirtualBox through a GIM provider may rely on
40	* the provider (and VirtualBox ultimately) for providing the correct TSC
41	* frequency of the host processor and may therefore not have to caliberate the
42	* TSC itself, resulting in higher accuracy and saving several CPU cycles.
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	* Header Files *
50	*******************************************************************************/
51	#define LOG_GROUP LOG_GROUP_GIM
52	#include <VBox/log.h>
53	#include "GIMInternal.h"
54	#include <VBox/vmm/vm.h>
55	#include <VBox/vmm/hm.h>
56	#include <VBox/vmm/ssm.h>
57	#include <VBox/vmm/pdmdev.h>
58
59	#include <iprt/err.h>
60	#include <iprt/string.h>
61
62	/* Include all GIM providers. */
63	#include "GIMMinimalInternal.h"
64	#include "GIMHvInternal.h"
65
66	/*******************************************************************************
67	* Internal Functions *
68	*******************************************************************************/
69	static DECLCALLBACK(int) gimR3Save(PVM pVM, PSSMHANDLE pSSM);
70	static DECLCALLBACK(int) gimR3Load(PVM pVM, PSSMHANDLE pSSM, uint32_t uVersion, uint32_t uPass);
71
72
73	/**
74	* Initializes the GIM.
75	*
76	* @returns VBox status code.
77	* @param pVM Pointer to the VM.
78	*/
79	VMMR3_INT_DECL(int) GIMR3Init(PVM pVM)
80	{
81	LogFlow(("GIMR3Init\n"));
82
83	/*
84	* Assert alignment and sizes.
85	*/
86	AssertCompile(sizeof(pVM->gim.s) <= sizeof(pVM->gim.padding));
87
88	/*
89	* Register the saved state data unit.
90	*/
91	int rc = SSMR3RegisterInternal(pVM, "GIM", 0 /* uInstance */, GIM_SAVED_STATE_VERSION, sizeof(GIM),
92	NULL /* pfnLivePrep /, NULL / pfnLiveExec /, NULL / pfnLiveVote*/,
93	NULL /* pfnSavePrep /, gimR3Save, NULL / pfnSaveDone */,
94	NULL /* pfnLoadPrep /, gimR3Load, NULL / pfnLoadDone */);
95	if (RT_FAILURE(rc))
96	return rc;
97
98	/*
99	* Read configuration.
100	*/
101	PCFGMNODE pCfgNode = CFGMR3GetChild(CFGMR3GetRoot(pVM), "GIM/");
102
103	/** @cfgm{/GIM/Provider, string}
104	* The name of the GIM provider. The default is "none". */
105	char szProvider[64];
106	rc = CFGMR3QueryStringDef(pCfgNode, "Provider", szProvider, sizeof(szProvider), "None");
107	AssertLogRelRCReturn(rc, rc);
108
109	/** @cfgm{/GIM/Version, uint32_t}
110	* The interface version. The default is 0, which means "provide the most
111	* up-to-date implementation". */
112	uint32_t uVersion;
113	rc = CFGMR3QueryU32Def(pCfgNode, "Version", &uVersion, 0 /* default */);
114	AssertLogRelRCReturn(rc, rc);
115
116	/*
117	* Setup the GIM provider for this VM.
118	*/
119	LogRel(("GIM: Using provider \"%s\" (Implementation version: %u)\n", szProvider, uVersion));
120	if (!RTStrCmp(szProvider, "None"))
121	pVM->gim.s.enmProviderId = GIMPROVIDERID_NONE;
122	else
123	{
124	pVM->gim.s.u32Version = uVersion;
125	/** @todo r=bird: Because u32Version is saved, it should be translated to the
126	* 'most up-to-date implementation' version number when 0. Otherwise,
127	* we'll have abiguities when loading the state of older VMs. */
128	if (!RTStrCmp(szProvider, "Minimal"))
129	{
130	pVM->gim.s.enmProviderId = GIMPROVIDERID_MINIMAL;
131	rc = GIMR3MinimalInit(pVM);
132	}
133	else if (!RTStrCmp(szProvider, "HyperV"))
134	{
135	pVM->gim.s.enmProviderId = GIMPROVIDERID_HYPERV;
136	rc = GIMR3HvInit(pVM);
137	}
138	/** @todo KVM and others. */
139	else
140	rc = VMR3SetError(pVM->pUVM, VERR_GIM_INVALID_PROVIDER, RT_SRC_POS, "Provider \"%s\" unknown.", szProvider);
141	}
142	return rc;
143	}
144
145
146	/**
147	* Initializes the remaining bits of the GIM provider.
148	*
149	* This is called after initializing HM and most other VMM components.
150	*
151	* @returns VBox status code.
152	* @param pVM Pointer to the VM.
153	* @param enmWhat What has been completed.
154	* @thread EMT(0)
155	*/
156	VMMR3_INT_DECL(int) GIMR3InitCompleted(PVM pVM)
157	{
158	switch (pVM->gim.s.enmProviderId)
159	{
160	case GIMPROVIDERID_MINIMAL:
161	return GIMR3MinimalInitCompleted(pVM);
162
163	case GIMPROVIDERID_HYPERV:
164	return GIMR3HvInitCompleted(pVM);
165
166	default:
167	break;
168	}
169	return VINF_SUCCESS;
170	}
171
172
173	/**
174	* Applies relocations to data and code managed by this component.
175	*
176	* This function will be called at init and whenever the VMM need to relocate
177	* itself inside the GC.
178	*
179	* @param pVM Pointer to the VM.
180	* @param offDelta Relocation delta relative to old location.
181	*/
182	VMM_INT_DECL(void) GIMR3Relocate(PVM pVM, RTGCINTPTR offDelta)
183	{
184	LogFlow(("GIMR3Relocate\n"));
185
186	if ( pVM->gim.s.enmProviderId == GIMPROVIDERID_NONE
187	\|\| HMIsEnabled(pVM))
188	{
189	return;
190	}
191
192	switch (pVM->gim.s.enmProviderId)
193	{
194	case GIMPROVIDERID_MINIMAL:
195	{
196	GIMR3MinimalRelocate(pVM, offDelta);
197	break;
198	}
199
200	case GIMPROVIDERID_HYPERV:
201	{
202	GIMR3HvRelocate(pVM, offDelta);
203	break;
204	}
205
206	case GIMPROVIDERID_KVM: /** @todo KVM. */
207	default:
208	{
209	AssertMsgFailed(("Invalid provider Id %#x\n", pVM->gim.s.enmProviderId));
210	break;
211	}
212	}
213	}
214
215
216	/**
217	* Executes state-save operation.
218	*
219	* @returns VBox status code.
220	* @param pVM Pointer to the VM.
221	* @param pSSM SSM operation handle.
222	*/
223	DECLCALLBACK(int) gimR3Save(PVM pVM, PSSMHANDLE pSSM)
224	{
225	AssertReturn(pVM, VERR_INVALID_PARAMETER);
226	AssertReturn(pSSM, VERR_SSM_INVALID_STATE);
227
228	/** @todo Save per-CPU data. */
229	int rc = VINF_SUCCESS;
230	#if 0
231	SSMR3PutU32(pSSM, pVM->cCpus);
232	for (VMCPUID i = 0; i < pVM->cCpus; i++)
233	{
234	rc = SSMR3PutXYZ(pSSM, pVM->aCpus[i].gim.s.XYZ);
235	}
236	#endif
237
238	/*
239	* Save per-VM data.
240	*/
241	SSMR3PutU32(pSSM, pVM->gim.s.enmProviderId);
242	SSMR3PutU32(pSSM, pVM->gim.s.u32Version);
243
244	/*
245	* Save provider-specific data.
246	*/
247	switch (pVM->gim.s.enmProviderId)
248	{
249	case GIMPROVIDERID_HYPERV:
250	rc = GIMR3HvSave(pVM, pSSM);
251	AssertRCReturn(rc, rc);
252	break;
253
254	default:
255	break;
256	}
257
258	return rc;
259	}
260
261
262	/**
263	* Execute state load operation.
264	*
265	* @returns VBox status code.
266	* @param pVM Pointer to the VM.
267	* @param pSSM SSM operation handle.
268	* @param uVersion Data layout version.
269	* @param uPass The data pass.
270	*/
271	DECLCALLBACK(int) gimR3Load(PVM pVM, PSSMHANDLE pSSM, uint32_t uVersion, uint32_t uPass)
272	{
273	if (uPass != SSM_PASS_FINAL)
274	return VINF_SUCCESS;
275	if (uVersion != GIM_SAVED_STATE_VERSION)
276	return VERR_SSM_UNSUPPORTED_DATA_UNIT_VERSION;
277
278
279	/** @todo Load per-CPU data. */
280	int rc;
281	#if 0
282	for (VMCPUID i = 0; i < pVM->cCpus; i++)
283	{
284	rc = SSMR3PutXYZ(pSSM, pVM->aCpus[i].gim.s.XYZ);
285	}
286	#endif
287
288	/*
289	* Load per-VM data.
290	*/
291	uint32_t uProviderId;
292	uint32_t uProviderVersion;
293
294	rc = SSMR3GetU32(pSSM, &uProviderId); AssertRCReturn(rc, rc);
295	rc = SSMR3GetU32(pSSM, &uProviderVersion); AssertRCReturn(rc, rc);
296
297	if ((GIMPROVIDERID)uProviderId != pVM->gim.s.enmProviderId)
298	return SSMR3SetCfgError(pSSM, RT_SRC_POS, N_("Saved GIM provider %u differs from the configured one (%u)."),
299	uProviderId, pVM->gim.s.enmProviderId);
300	#if 0 /** @todo r=bird: Figure out what you mean to do here with the version. */
301	if (uProviderVersion != pVM->gim.s.u32Version)
302	return SSMR3SetCfgError(pSSM, RT_SRC_POS, N_("Saved GIM provider version %u differs from the configured one (%u)."),
303	uProviderVersion, pVM->gim.s.u32Version);
304	#else
305	pVM->gim.s.u32Version = uProviderVersion;
306	#endif
307
308	/*
309	* Load provider-specific data.
310	*/
311	switch (pVM->gim.s.enmProviderId)
312	{
313	case GIMPROVIDERID_HYPERV:
314	rc = GIMR3HvLoad(pVM, pSSM, uVersion);
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 Pointer to the VM.
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	default:
343	break;
344	}
345	return VINF_SUCCESS;
346	}
347
348
349	/**
350	* The VM is being reset.
351	*
352	* For the GIM component this means unmapping and unregistering MMIO2 regions
353	* and other provider-specific resets.
354	*
355	* @returns VBox status code.
356	* @param pVM Pointer to the VM.
357	*/
358	VMMR3_INT_DECL(void) GIMR3Reset(PVM pVM)
359	{
360	switch (pVM->gim.s.enmProviderId)
361	{
362	case GIMPROVIDERID_HYPERV:
363	return GIMR3HvReset(pVM);
364
365	default:
366	break;
367	}
368	}
369
370
371	/**
372	* Registers the GIM device with VMM.
373	*
374	* @param pVM Pointer to the VM.
375	* @param pDevIns Pointer to the GIM device instance.
376	*/
377	VMMR3DECL(void) GIMR3GimDeviceRegister(PVM pVM, PPDMDEVINS pDevIns)
378	{
379	pVM->gim.s.pDevInsR3 = pDevIns;
380	}
381
382
383	/**
384	* Returns the array of MMIO2 regions that are expected to be registered and
385	* later mapped into the guest-physical address space for the GIM provider
386	* configured for the VM.
387	*
388	* @returns Pointer to an array of GIM MMIO2 regions, may return NULL.
389	* @param pVM Pointer to the VM.
390	* @param pcRegions Where to store the number of items in the array.
391	*
392	* @remarks The caller does not own and therefore must -NOT- try to free the
393	* returned pointer.
394	*/
395	VMMR3DECL(PGIMMMIO2REGION) GIMR3GetMmio2Regions(PVM pVM, uint32_t *pcRegions)
396	{
397	Assert(pVM);
398	Assert(pcRegions);
399
400	*pcRegions = 0;
401	switch (pVM->gim.s.enmProviderId)
402	{
403	case GIMPROVIDERID_HYPERV:
404	return GIMR3HvGetMmio2Regions(pVM, pcRegions);
405
406	case GIMPROVIDERID_KVM: /** @todo KVM. */
407	default:
408	break;
409	}
410
411	return NULL;
412	}
413
414
415	/**
416	* Unmaps a registered MMIO2 region in the guest address space and removes any
417	* access handlers for it.
418	*
419	* @returns VBox status code.
420	* @param pVM Pointer to the VM.
421	* @param pRegion Pointer to the GIM MMIO2 region.
422	*/
423	VMMR3_INT_DECL(int) GIMR3Mmio2Unmap(PVM pVM, PGIMMMIO2REGION pRegion)
424	{
425	AssertPtr(pVM);
426	AssertPtr(pRegion);
427
428	PPDMDEVINS pDevIns = pVM->gim.s.pDevInsR3;
429	AssertPtr(pDevIns);
430	if (pRegion->fMapped)
431	{
432	int rc = PGMHandlerPhysicalDeregister(pVM, pRegion->GCPhysPage);
433	AssertRC(rc);
434
435	rc = PDMDevHlpMMIO2Unmap(pDevIns, pRegion->iRegion, pRegion->GCPhysPage);
436	if (RT_SUCCESS(rc))
437	{
438	pRegion->fMapped = false;
439	pRegion->GCPhysPage = NIL_RTGCPHYS;
440	}
441	}
442	return VINF_SUCCESS;
443	}
444
445
446	/**
447	* Write access handler for a mapped MMIO2 region. At present, this handler
448	* simply ignores writes.
449	*
450	* In the future we might want to let the GIM provider decide what the handler
451	* should do (like throwing #GP faults).
452	*
453	* @returns VBox status code.
454	* @param pVM Pointer to the VM.
455	* @param GCPhys The guest-physical address of the region.
456	* @param pvPhys Pointer to the region in the guest address space.
457	* @param pvBuf Pointer to the data being read/written.
458	* @param cbBuf The size of the buffer in @a pvBuf.
459	* @param enmAccessType The type of access.
460	* @param pvUser User argument (NULL, not used).
461	*/
462	static DECLCALLBACK(int) gimR3Mmio2WriteHandler(PVM pVM, RTGCPHYS GCPhys, void pvPhys, void pvBuf, size_t cbBuf,
463	PGMACCESSTYPE enmAccessType, void *pvUser)
464	{
465	/*
466	* Ignore writes to the mapped MMIO2 page.
467	*/
468	Assert(enmAccessType == PGMACCESSTYPE_WRITE);
469	return VINF_SUCCESS; /** @todo Hyper-V says we should #GP(0) fault for writes to the Hypercall and TSC page. */
470	}
471
472
473	/**
474	* Maps a registered MMIO2 region in the guest address space. The region will be
475	* made read-only and writes from the guest will be ignored.
476	*
477	* @returns VBox status code.
478	* @param pVM Pointer to the VM.
479	* @param pRegion Pointer to the GIM MMIO2 region.
480	* @param GCPhysRegion Where in the guest address space to map the region.
481	*/
482	VMMR3_INT_DECL(int) GIMR3Mmio2Map(PVM pVM, PGIMMMIO2REGION pRegion, RTGCPHYS GCPhysRegion)
483	{
484	PPDMDEVINS pDevIns = pVM->gim.s.pDevInsR3;
485	AssertPtr(pDevIns);
486
487	/* The guest-physical address must be page-aligned. */
488	if (GCPhysRegion & PAGE_OFFSET_MASK)
489	{
490	LogFunc(("%s: %#RGp not paging aligned\n", pRegion->szDescription, GCPhysRegion));
491	return VERR_PGM_INVALID_GC_PHYSICAL_ADDRESS;
492	}
493
494	/* Allow only normal pages to be overlaid using our MMIO2 pages (disallow MMIO, ROM, reserved pages). */
495	/** @todo Hyper-V doesn't seem to be very strict about this, may be relax
496	* later if some guest really requires it. */
497	if (!PGMPhysIsGCPhysNormal(pVM, GCPhysRegion))
498	{
499	LogFunc(("%s: %#RGp is not normal memory\n", pRegion->szDescription, GCPhysRegion));
500	return VERR_PGM_INVALID_GC_PHYSICAL_ADDRESS;
501	}
502
503	if (!pRegion->fRegistered)
504	{
505	LogFunc(("%s: Region has not been registered.\n"));
506	return VERR_GIM_IPE_1;
507	}
508
509	/*
510	* Map the MMIO2 region over the specified guest-physical address.
511	*/
512	int rc = PDMDevHlpMMIO2Map(pDevIns, pRegion->iRegion, GCPhysRegion);
513	if (RT_SUCCESS(rc))
514	{
515	/*
516	* Install access-handlers for the mapped page to prevent (ignore) writes to it from the guest.
517	*/
518	rc = PGMR3HandlerPhysicalRegister(pVM,
519	PGMPHYSHANDLERTYPE_PHYSICAL_WRITE,
520	GCPhysRegion, GCPhysRegion + (pRegion->cbRegion - 1),
521	gimR3Mmio2WriteHandler, NULL /* pvUserR3 */,
522	NULL /* pszModR0 /, NULL / pszHandlerR0 /, NIL_RTR0PTR / pvUserR0 */,
523	NULL /* pszModRC /, NULL / pszHandlerRC /, NIL_RTRCPTR / pvUserRC */,
524	pRegion->szDescription);
525	if (RT_SUCCESS(rc))
526	{
527	pRegion->fMapped = true;
528	pRegion->GCPhysPage = GCPhysRegion;
529	return rc;
530	}
531
532	PDMDevHlpMMIO2Unmap(pDevIns, pRegion->iRegion, GCPhysRegion);
533	}
534
535	return rc;
536	}
537
538	#if 0
539	/**
540	* Registers the physical handler for the registered and mapped MMIO2 region.
541	*
542	* @returns VBox status code.
543	* @param pVM Pointer to the VM.
544	* @param pRegion Pointer to the GIM MMIO2 region.
545	*/
546	VMMR3_INT_DECL(int) GIMR3Mmio2HandlerPhysicalRegister(PVM pVM, PGIMMMIO2REGION pRegion)
547	{
548	AssertPtr(pRegion);
549	AssertReturn(pRegion->fRegistered, VERR_GIM_IPE_2);
550	AssertReturn(pRegion->fMapped, VERR_GIM_IPE_3);
551
552	return PGMR3HandlerPhysicalRegister(pVM,
553	PGMPHYSHANDLERTYPE_PHYSICAL_WRITE,
554	pRegion->GCPhysPage, pRegion->GCPhysPage + (pRegion->cbRegion - 1),
555	gimR3Mmio2WriteHandler, NULL /* pvUserR3 */,
556	NULL /* pszModR0 /, NULL / pszHandlerR0 /, NIL_RTR0PTR / pvUserR0 */,
557	NULL /* pszModRC /, NULL / pszHandlerRC /, NIL_RTRCPTR / pvUserRC */,
558	pRegion->szDescription);
559	}
560
561
562	/**
563	* Deregisters the physical handler for the MMIO2 region.
564	*
565	* @returns VBox status code.
566	* @param pVM Pointer to the VM.
567	* @param pRegion Pointer to the GIM MMIO2 region.
568	*/
569	VMMR3_INT_DECL(int) GIMR3Mmio2HandlerPhysicalDeregister(PVM pVM, PGIMMMIO2REGION pRegion)
570	{
571	return PGMHandlerPhysicalDeregister(pVM, pRegion->GCPhysPage);
572	}
573	#endif
574

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source: vbox/trunk/src/VBox/VMM/VMMR3/GIM.cpp@ 53404

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