PDMDevice.cpp@ 71800

Last change on this file since 71800 was 70948, checked in by vboxsync, 7 years ago
VMM: Added a bMainExecutionEngine member to the VM structure for use instead of fHMEnabled and fNEMEnabled. Changed a lot of HMIsEnabled invocations to use the new macros VM_IS_RAW_MODE_ENABLED and VM_IS_HM_OR_NEM_ENABLED. Eliminated fHMEnabledFixed. Fixed inverted test for raw-mode debug register sanity checking. Some other minor cleanups.
Property svn:eol-style set to `native` Property svn:keywords set to `Id Revision`
File size: 40.4 KB

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1	/* $Id: PDMDevice.cpp 70948 2018-02-10 15:38:12Z vboxsync $ */
2	/** @file
3	* PDM - Pluggable Device and Driver Manager, Device parts.
4	*/
5
6	/*
7	* Copyright (C) 2006-2017 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_PDM_DEVICE
23	#include "PDMInternal.h"
24	#include <VBox/vmm/pdm.h>
25	#include <VBox/vmm/mm.h>
26	#include <VBox/vmm/pgm.h>
27	#include <VBox/vmm/iom.h>
28	#include <VBox/vmm/hm.h>
29	#include <VBox/vmm/cfgm.h>
30	#include <VBox/vmm/apic.h>
31	#ifdef VBOX_WITH_REM
32	# include <VBox/vmm/rem.h>
33	#endif
34	#include <VBox/vmm/dbgf.h>
35	#include <VBox/vmm/vm.h>
36	#include <VBox/vmm/uvm.h>
37	#include <VBox/vmm/vmm.h>
38
39	#include <VBox/version.h>
40	#include <VBox/log.h>
41	#include <VBox/err.h>
42	#include <iprt/alloc.h>
43	#include <iprt/alloca.h>
44	#include <iprt/asm.h>
45	#include <iprt/assert.h>
46	#include <iprt/path.h>
47	#include <iprt/semaphore.h>
48	#include <iprt/string.h>
49	#include <iprt/thread.h>
50
51
52	/*********************************************************************************************************************************
53	* Structures and Typedefs *
54	*********************************************************************************************************************************/
55	/**
56	* Internal callback structure pointer.
57	* The main purpose is to define the extra data we associate
58	* with PDMDEVREGCB so we can find the VM instance and so on.
59	*/
60	typedef struct PDMDEVREGCBINT
61	{
62	/** The callback structure. */
63	PDMDEVREGCB Core;
64	/** A bit of padding. */
65	uint32_t u32[4];
66	/** VM Handle. */
67	PVM pVM;
68	/** Pointer to the configuration node the registrations should be
69	* associated with. Can be NULL. */
70	PCFGMNODE pCfgNode;
71	} PDMDEVREGCBINT;
72	/** Pointer to a PDMDEVREGCBINT structure. */
73	typedef PDMDEVREGCBINT *PPDMDEVREGCBINT;
74	/** Pointer to a const PDMDEVREGCBINT structure. */
75	typedef const PDMDEVREGCBINT *PCPDMDEVREGCBINT;
76
77
78	/*********************************************************************************************************************************
79	* Internal Functions *
80	*********************************************************************************************************************************/
81	static DECLCALLBACK(int) pdmR3DevReg_Register(PPDMDEVREGCB pCallbacks, PCPDMDEVREG pReg);
82	static int pdmR3DevLoadModules(PVM pVM);
83	static int pdmR3DevLoad(PVM pVM, PPDMDEVREGCBINT pRegCB, const char pszFilename, const char pszName);
84
85
86
87
88	/**
89	* This function will initialize the devices for this VM instance.
90	*
91	*
92	* First of all this mean loading the builtin device and letting them
93	* register themselves. Beyond that any additional device modules are
94	* loaded and called for registration.
95	*
96	* Then the device configuration is enumerated, the instantiation order
97	* is determined, and finally they are instantiated.
98	*
99	* After all devices have been successfully instantiated the primary
100	* PCI Bus device is called to emulate the PCI BIOS, i.e. making the
101	* resource assignments. If there is no PCI device, this step is of course
102	* skipped.
103	*
104	* Finally the init completion routines of the instantiated devices
105	* are called.
106	*
107	* @returns VBox status code.
108	* @param pVM The cross context VM structure.
109	*/
110	int pdmR3DevInit(PVM pVM)
111	{
112	LogFlow(("pdmR3DevInit:\n"));
113
114	AssertRelease(!(RT_OFFSETOF(PDMDEVINS, achInstanceData) & 15));
115	AssertRelease(sizeof(pVM->pdm.s.pDevInstances->Internal.s) <= sizeof(pVM->pdm.s.pDevInstances->Internal.padding));
116
117	/*
118	* Load device modules.
119	*/
120	int rc = pdmR3DevLoadModules(pVM);
121	if (RT_FAILURE(rc))
122	return rc;
123
124	#ifdef VBOX_WITH_USB
125	/* ditto for USB Devices. */
126	rc = pdmR3UsbLoadModules(pVM);
127	if (RT_FAILURE(rc))
128	return rc;
129	#endif
130
131	/*
132	* Get the RC & R0 devhlps and create the devhlp R3 task queue.
133	*/
134	PCPDMDEVHLPRC pHlpRC = NIL_RTRCPTR;
135	if (VM_IS_RAW_MODE_ENABLED(pVM))
136	{
137	rc = PDMR3LdrGetSymbolRC(pVM, NULL, "g_pdmRCDevHlp", &pHlpRC);
138	AssertReleaseRCReturn(rc, rc);
139	}
140
141	PCPDMDEVHLPR0 pHlpR0;
142	rc = PDMR3LdrGetSymbolR0(pVM, NULL, "g_pdmR0DevHlp", &pHlpR0);
143	AssertReleaseRCReturn(rc, rc);
144
145	rc = PDMR3QueueCreateInternal(pVM, sizeof(PDMDEVHLPTASK), 8, 0, pdmR3DevHlpQueueConsumer, true, "DevHlp",
146	&pVM->pdm.s.pDevHlpQueueR3);
147	AssertRCReturn(rc, rc);
148	pVM->pdm.s.pDevHlpQueueR0 = PDMQueueR0Ptr(pVM->pdm.s.pDevHlpQueueR3);
149	pVM->pdm.s.pDevHlpQueueRC = PDMQueueRCPtr(pVM->pdm.s.pDevHlpQueueR3);
150
151
152	/*
153	*
154	* Enumerate the device instance configurations
155	* and come up with a instantiation order.
156	*
157	*/
158	/* Switch to /Devices, which contains the device instantiations. */
159	PCFGMNODE pDevicesNode = CFGMR3GetChild(CFGMR3GetRoot(pVM), "Devices");
160
161	/*
162	* Count the device instances.
163	*/
164	PCFGMNODE pCur;
165	PCFGMNODE pInstanceNode;
166	unsigned cDevs = 0;
167	for (pCur = CFGMR3GetFirstChild(pDevicesNode); pCur; pCur = CFGMR3GetNextChild(pCur))
168	for (pInstanceNode = CFGMR3GetFirstChild(pCur); pInstanceNode; pInstanceNode = CFGMR3GetNextChild(pInstanceNode))
169	cDevs++;
170	if (!cDevs)
171	{
172	Log(("PDM: No devices were configured!\n"));
173	return VINF_SUCCESS;
174	}
175	Log2(("PDM: cDevs=%u\n", cDevs));
176
177	/*
178	* Collect info on each device instance.
179	*/
180	struct DEVORDER
181	{
182	/** Configuration node. */
183	PCFGMNODE pNode;
184	/** Pointer to device. */
185	PPDMDEV pDev;
186	/** Init order. */
187	uint32_t u32Order;
188	/** VBox instance number. */
189	uint32_t iInstance;
190	} paDevs = (struct DEVORDER )alloca(sizeof(paDevs[0]) * (cDevs + 1)); /* (One extra for swapping) */
191	Assert(paDevs);
192	unsigned i = 0;
193	for (pCur = CFGMR3GetFirstChild(pDevicesNode); pCur; pCur = CFGMR3GetNextChild(pCur))
194	{
195	/* Get the device name. */
196	char szName[sizeof(paDevs[0].pDev->pReg->szName)];
197	rc = CFGMR3GetName(pCur, szName, sizeof(szName));
198	AssertMsgRCReturn(rc, ("Configuration error: device name is too long (or something)! rc=%Rrc\n", rc), rc);
199
200	/* Find the device. */
201	PPDMDEV pDev = pdmR3DevLookup(pVM, szName);
202	AssertLogRelMsgReturn(pDev, ("Configuration error: device '%s' not found!\n", szName), VERR_PDM_DEVICE_NOT_FOUND);
203
204	/* Configured priority or use default based on device class? */
205	uint32_t u32Order;
206	rc = CFGMR3QueryU32(pCur, "Priority", &u32Order);
207	if (rc == VERR_CFGM_VALUE_NOT_FOUND)
208	{
209	uint32_t u32 = pDev->pReg->fClass;
210	for (u32Order = 1; !(u32 & u32Order); u32Order <<= 1)
211	/* nop */;
212	}
213	else
214	AssertMsgRCReturn(rc, ("Configuration error: reading \"Priority\" for the '%s' device failed rc=%Rrc!\n", szName, rc), rc);
215
216	/* Enumerate the device instances. */
217	uint32_t const iStart = i;
218	for (pInstanceNode = CFGMR3GetFirstChild(pCur); pInstanceNode; pInstanceNode = CFGMR3GetNextChild(pInstanceNode))
219	{
220	paDevs[i].pNode = pInstanceNode;
221	paDevs[i].pDev = pDev;
222	paDevs[i].u32Order = u32Order;
223
224	/* Get the instance number. */
225	char szInstance[32];
226	rc = CFGMR3GetName(pInstanceNode, szInstance, sizeof(szInstance));
227	AssertMsgRCReturn(rc, ("Configuration error: instance name is too long (or something)! rc=%Rrc\n", rc), rc);
228	char *pszNext = NULL;
229	rc = RTStrToUInt32Ex(szInstance, &pszNext, 0, &paDevs[i].iInstance);
230	AssertMsgRCReturn(rc, ("Configuration error: RTStrToInt32Ex failed on the instance name '%s'! rc=%Rrc\n", szInstance, rc), rc);
231	AssertMsgReturn(!*pszNext, ("Configuration error: the instance name '%s' isn't all digits. (%s)\n", szInstance, pszNext), VERR_INVALID_PARAMETER);
232
233	/* next instance */
234	i++;
235	}
236
237	/* check the number of instances */
238	if (i - iStart > pDev->pReg->cMaxInstances)
239	AssertLogRelMsgFailedReturn(("Configuration error: Too many instances of %s was configured: %u, max %u\n",
240	szName, i - iStart, pDev->pReg->cMaxInstances),
241	VERR_PDM_TOO_MANY_DEVICE_INSTANCES);
242	} /* devices */
243	Assert(i == cDevs);
244
245	/*
246	* Sort (bubble) the device array ascending on u32Order and instance number
247	* for a device.
248	*/
249	unsigned c = cDevs - 1;
250	while (c)
251	{
252	unsigned j = 0;
253	for (i = 0; i < c; i++)
254	if ( paDevs[i].u32Order > paDevs[i + 1].u32Order
255	\|\| ( paDevs[i].u32Order == paDevs[i + 1].u32Order
256	&& paDevs[i].iInstance > paDevs[i + 1].iInstance
257	&& paDevs[i].pDev == paDevs[i + 1].pDev) )
258	{
259	paDevs[cDevs] = paDevs[i + 1];
260	paDevs[i + 1] = paDevs[i];
261	paDevs[i] = paDevs[cDevs];
262	j = i;
263	}
264	c = j;
265	}
266
267
268	/*
269	*
270	* Instantiate the devices.
271	*
272	*/
273	for (i = 0; i < cDevs; i++)
274	{
275	/*
276	* Gather a bit of config.
277	*/
278	/* trusted */
279	bool fTrusted;
280	rc = CFGMR3QueryBool(paDevs[i].pNode, "Trusted", &fTrusted);
281	if (rc == VERR_CFGM_VALUE_NOT_FOUND)
282	fTrusted = false;
283	else if (RT_FAILURE(rc))
284	{
285	AssertMsgFailed(("configuration error: failed to query boolean \"Trusted\", rc=%Rrc\n", rc));
286	return rc;
287	}
288	/* config node */
289	PCFGMNODE pConfigNode = CFGMR3GetChild(paDevs[i].pNode, "Config");
290	if (!pConfigNode)
291	{
292	rc = CFGMR3InsertNode(paDevs[i].pNode, "Config", &pConfigNode);
293	if (RT_FAILURE(rc))
294	{
295	AssertMsgFailed(("Failed to create Config node! rc=%Rrc\n", rc));
296	return rc;
297	}
298	}
299	CFGMR3SetRestrictedRoot(pConfigNode);
300
301	/*
302	* Allocate the device instance and critical section.
303	*/
304	AssertReturn(paDevs[i].pDev->cInstances < paDevs[i].pDev->pReg->cMaxInstances, VERR_PDM_TOO_MANY_DEVICE_INSTANCES);
305	size_t cb = RT_OFFSETOF(PDMDEVINS, achInstanceData[paDevs[i].pDev->pReg->cbInstance]);
306	cb = RT_ALIGN_Z(cb, 16);
307	PPDMDEVINS pDevIns;
308	if (paDevs[i].pDev->pReg->fFlags & (PDM_DEVREG_FLAGS_RC \| PDM_DEVREG_FLAGS_R0))
309	rc = MMR3HyperAllocOnceNoRel(pVM, cb, 0, MM_TAG_PDM_DEVICE, (void **)&pDevIns);
310	else
311	rc = MMR3HeapAllocZEx(pVM, MM_TAG_PDM_DEVICE, cb, (void **)&pDevIns);
312	AssertLogRelMsgRCReturn(rc,
313	("Failed to allocate %d bytes of instance data for device '%s'. rc=%Rrc\n",
314	cb, paDevs[i].pDev->pReg->szName, rc),
315	rc);
316	PPDMCRITSECT pCritSect;
317	if (paDevs[i].pDev->pReg->fFlags & (PDM_DEVREG_FLAGS_RC \| PDM_DEVREG_FLAGS_R0))
318	rc = MMHyperAlloc(pVM, sizeof(pCritSect), 0, MM_TAG_PDM_DEVICE, (void *)&pCritSect);
319	else
320	rc = MMR3HeapAllocZEx(pVM, MM_TAG_PDM_DEVICE, sizeof(pCritSect), (void *)&pCritSect);
321	AssertLogRelMsgRCReturn(rc, ("Failed to allocate a critical section for the device (%Rrc)\n", rc), rc);
322
323	/*
324	* Initialize it.
325	*/
326	pDevIns->u32Version = PDM_DEVINS_VERSION;
327	pDevIns->iInstance = paDevs[i].iInstance;
328	//pDevIns->Internal.s.pNextR3 = NULL;
329	//pDevIns->Internal.s.pPerDeviceNextR3 = NULL;
330	pDevIns->Internal.s.pDevR3 = paDevs[i].pDev;
331	pDevIns->Internal.s.pVMR3 = pVM;
332	pDevIns->Internal.s.pVMR0 = pVM->pVMR0;
333	pDevIns->Internal.s.pVMRC = pVM->pVMRC;
334	//pDevIns->Internal.s.pLunsR3 = NULL;
335	pDevIns->Internal.s.pCfgHandle = paDevs[i].pNode;
336	//pDevIns->Internal.s.pHeadPciDevR3 = NULL;
337	//pDevIns->Internal.s.pHeadPciDevR0 = 0;
338	//pDevIns->Internal.s.pHeadPciDevRC = 0;
339	pDevIns->Internal.s.fIntFlags = PDMDEVINSINT_FLAGS_SUSPENDED;
340	//pDevIns->Internal.s.uLastIrqTag = 0;
341	pDevIns->pHlpR3 = fTrusted ? &g_pdmR3DevHlpTrusted : &g_pdmR3DevHlpUnTrusted;
342	pDevIns->pHlpRC = pHlpRC;
343	pDevIns->pHlpR0 = pHlpR0;
344	pDevIns->pReg = paDevs[i].pDev->pReg;
345	pDevIns->pCfg = pConfigNode;
346	//pDevIns->IBase.pfnQueryInterface = NULL;
347	//pDevIns->fTracing = 0;
348	pDevIns->idTracing = ++pVM->pdm.s.idTracingDev;
349	pDevIns->pvInstanceDataR3 = &pDevIns->achInstanceData[0];
350	pDevIns->pvInstanceDataRC = pDevIns->pReg->fFlags & PDM_DEVREG_FLAGS_RC
351	? MMHyperR3ToRC(pVM, pDevIns->pvInstanceDataR3) : NIL_RTRCPTR;
352	pDevIns->pvInstanceDataR0 = pDevIns->pReg->fFlags & PDM_DEVREG_FLAGS_R0
353	? MMHyperR3ToR0(pVM, pDevIns->pvInstanceDataR3) : NIL_RTR0PTR;
354
355	pDevIns->pCritSectRoR3 = pCritSect;
356	pDevIns->pCritSectRoRC = pDevIns->pReg->fFlags & PDM_DEVREG_FLAGS_RC
357	? MMHyperR3ToRC(pVM, pCritSect) : NIL_RTRCPTR;
358	pDevIns->pCritSectRoR0 = pDevIns->pReg->fFlags & PDM_DEVREG_FLAGS_R0
359	? MMHyperR3ToR0(pVM, pCritSect) : NIL_RTR0PTR;
360
361	rc = pdmR3CritSectInitDeviceAuto(pVM, pDevIns, pCritSect, RT_SRC_POS,
362	"%s#%uAuto", pDevIns->pReg->szName, pDevIns->iInstance);
363	AssertLogRelRCReturn(rc, rc);
364
365	/*
366	* Link it into all the lists.
367	*/
368	/* The global instance FIFO. */
369	PPDMDEVINS pPrev1 = pVM->pdm.s.pDevInstances;
370	if (!pPrev1)
371	pVM->pdm.s.pDevInstances = pDevIns;
372	else
373	{
374	while (pPrev1->Internal.s.pNextR3)
375	pPrev1 = pPrev1->Internal.s.pNextR3;
376	pPrev1->Internal.s.pNextR3 = pDevIns;
377	}
378
379	/* The per device instance FIFO. */
380	PPDMDEVINS pPrev2 = paDevs[i].pDev->pInstances;
381	if (!pPrev2)
382	paDevs[i].pDev->pInstances = pDevIns;
383	else
384	{
385	while (pPrev2->Internal.s.pPerDeviceNextR3)
386	pPrev2 = pPrev2->Internal.s.pPerDeviceNextR3;
387	pPrev2->Internal.s.pPerDeviceNextR3 = pDevIns;
388	}
389
390	/*
391	* Call the constructor.
392	*/
393	paDevs[i].pDev->cInstances++;
394	Log(("PDM: Constructing device '%s' instance %d...\n", pDevIns->pReg->szName, pDevIns->iInstance));
395	rc = pDevIns->pReg->pfnConstruct(pDevIns, pDevIns->iInstance, pDevIns->pCfg);
396	if (RT_FAILURE(rc))
397	{
398	LogRel(("PDM: Failed to construct '%s'/%d! %Rra\n", pDevIns->pReg->szName, pDevIns->iInstance, rc));
399	paDevs[i].pDev->cInstances--;
400	/* Because we're damn lazy, the destructor will be called even if
401	the constructor fails. So, no unlinking. */
402	return rc == VERR_VERSION_MISMATCH ? VERR_PDM_DEVICE_VERSION_MISMATCH : rc;
403	}
404	} /* for device instances */
405
406	#ifdef VBOX_WITH_USB
407	/* ditto for USB Devices. */
408	rc = pdmR3UsbInstantiateDevices(pVM);
409	if (RT_FAILURE(rc))
410	return rc;
411	#endif
412
413	LogFlow(("pdmR3DevInit: returns %Rrc\n", VINF_SUCCESS));
414	return VINF_SUCCESS;
415	}
416
417
418	/**
419	* Performs the init complete callback after ring-0 and raw-mode has been
420	* initialized.
421	*
422	* @returns VBox status code.
423	* @param pVM The cross context VM structure.
424	*/
425	int pdmR3DevInitComplete(PVM pVM)
426	{
427	int rc;
428
429	/*
430	* Iterate thru the device instances and work the callback.
431	*/
432	for (PPDMDEVINS pDevIns = pVM->pdm.s.pDevInstances; pDevIns; pDevIns = pDevIns->Internal.s.pNextR3)
433	{
434	if (pDevIns->pReg->pfnInitComplete)
435	{
436	PDMCritSectEnter(pDevIns->pCritSectRoR3, VERR_IGNORED);
437	rc = pDevIns->pReg->pfnInitComplete(pDevIns);
438	PDMCritSectLeave(pDevIns->pCritSectRoR3);
439	if (RT_FAILURE(rc))
440	{
441	AssertMsgFailed(("InitComplete on device '%s'/%d failed with rc=%Rrc\n",
442	pDevIns->pReg->szName, pDevIns->iInstance, rc));
443	return rc;
444	}
445	}
446	}
447
448	#ifdef VBOX_WITH_USB
449	rc = pdmR3UsbVMInitComplete(pVM);
450	if (RT_FAILURE(rc))
451	{
452	Log(("pdmR3DevInit: returns %Rrc\n", rc));
453	return rc;
454	}
455	#endif
456
457	LogFlow(("pdmR3DevInit: returns %Rrc\n", VINF_SUCCESS));
458	return VINF_SUCCESS;
459	}
460
461
462	/**
463	* Lookups a device structure by name.
464	* @internal
465	*/
466	PPDMDEV pdmR3DevLookup(PVM pVM, const char *pszName)
467	{
468	size_t cchName = strlen(pszName);
469	for (PPDMDEV pDev = pVM->pdm.s.pDevs; pDev; pDev = pDev->pNext)
470	if ( pDev->cchName == cchName
471	&& !strcmp(pDev->pReg->szName, pszName))
472	return pDev;
473	return NULL;
474	}
475
476
477	/**
478	* Loads the device modules.
479	*
480	* @returns VBox status code.
481	* @param pVM The cross context VM structure.
482	*/
483	static int pdmR3DevLoadModules(PVM pVM)
484	{
485	/*
486	* Initialize the callback structure.
487	*/
488	PDMDEVREGCBINT RegCB;
489	RegCB.Core.u32Version = PDM_DEVREG_CB_VERSION;
490	RegCB.Core.pfnRegister = pdmR3DevReg_Register;
491	RegCB.pVM = pVM;
492	RegCB.pCfgNode = NULL;
493
494	/*
495	* Load the internal VMM APIC device.
496	*/
497	int rc2 = pdmR3DevReg_Register(&RegCB.Core, &g_DeviceAPIC);
498	AssertRCReturn(rc2, rc2);
499
500	/*
501	* Load the builtin module.
502	*/
503	PCFGMNODE pDevicesNode = CFGMR3GetChild(CFGMR3GetRoot(pVM), "PDM/Devices");
504	bool fLoadBuiltin;
505	int rc = CFGMR3QueryBool(pDevicesNode, "LoadBuiltin", &fLoadBuiltin);
506	if (rc == VERR_CFGM_VALUE_NOT_FOUND \|\| rc == VERR_CFGM_NO_PARENT)
507	fLoadBuiltin = true;
508	else if (RT_FAILURE(rc))
509	{
510	AssertMsgFailed(("Configuration error: Querying boolean \"LoadBuiltin\" failed with %Rrc\n", rc));
511	return rc;
512	}
513	if (fLoadBuiltin)
514	{
515	/* make filename */
516	char pszFilename = pdmR3FileR3("VBoxDD", true /fShared*/);
517	if (!pszFilename)
518	return VERR_NO_TMP_MEMORY;
519	rc = pdmR3DevLoad(pVM, &RegCB, pszFilename, "VBoxDD");
520	RTMemTmpFree(pszFilename);
521	if (RT_FAILURE(rc))
522	return rc;
523
524	/* make filename */
525	pszFilename = pdmR3FileR3("VBoxDD2", true /fShared/);
526	if (!pszFilename)
527	return VERR_NO_TMP_MEMORY;
528	rc = pdmR3DevLoad(pVM, &RegCB, pszFilename, "VBoxDD2");
529	RTMemTmpFree(pszFilename);
530	if (RT_FAILURE(rc))
531	return rc;
532	}
533
534	/*
535	* Load additional device modules.
536	*/
537	PCFGMNODE pCur;
538	for (pCur = CFGMR3GetFirstChild(pDevicesNode); pCur; pCur = CFGMR3GetNextChild(pCur))
539	{
540	/*
541	* Get the name and path.
542	*/
543	char szName[PDMMOD_NAME_LEN];
544	rc = CFGMR3GetName(pCur, &szName[0], sizeof(szName));
545	if (rc == VERR_CFGM_NOT_ENOUGH_SPACE)
546	{
547	AssertMsgFailed(("configuration error: The module name is too long, cchName=%zu.\n", CFGMR3GetNameLen(pCur)));
548	return VERR_PDM_MODULE_NAME_TOO_LONG;
549	}
550	else if (RT_FAILURE(rc))
551	{
552	AssertMsgFailed(("CFGMR3GetName -> %Rrc.\n", rc));
553	return rc;
554	}
555
556	/* the path is optional, if no path the module name + path is used. */
557	char szFilename[RTPATH_MAX];
558	rc = CFGMR3QueryString(pCur, "Path", &szFilename[0], sizeof(szFilename));
559	if (rc == VERR_CFGM_VALUE_NOT_FOUND)
560	strcpy(szFilename, szName);
561	else if (RT_FAILURE(rc))
562	{
563	AssertMsgFailed(("configuration error: Failure to query the module path, rc=%Rrc.\n", rc));
564	return rc;
565	}
566
567	/* prepend path? */
568	if (!RTPathHavePath(szFilename))
569	{
570	char psz = pdmR3FileR3(szFilename, false /fShared*/);
571	if (!psz)
572	return VERR_NO_TMP_MEMORY;
573	size_t cch = strlen(psz) + 1;
574	if (cch > sizeof(szFilename))
575	{
576	RTMemTmpFree(psz);
577	AssertMsgFailed(("Filename too long! cch=%d '%s'\n", cch, psz));
578	return VERR_FILENAME_TOO_LONG;
579	}
580	memcpy(szFilename, psz, cch);
581	RTMemTmpFree(psz);
582	}
583
584	/*
585	* Load the module and register it's devices.
586	*/
587	RegCB.pCfgNode = pCur;
588	rc = pdmR3DevLoad(pVM, &RegCB, szFilename, szName);
589	if (RT_FAILURE(rc))
590	return rc;
591	}
592
593	return VINF_SUCCESS;
594	}
595
596
597	/**
598	* Loads one device module and call the registration entry point.
599	*
600	* @returns VBox status code.
601	* @param pVM The cross context VM structure.
602	* @param pRegCB The registration callback stuff.
603	* @param pszFilename Module filename.
604	* @param pszName Module name.
605	*/
606	static int pdmR3DevLoad(PVM pVM, PPDMDEVREGCBINT pRegCB, const char pszFilename, const char pszName)
607	{
608	/*
609	* Load it.
610	*/
611	int rc = pdmR3LoadR3U(pVM->pUVM, pszFilename, pszName);
612	if (RT_SUCCESS(rc))
613	{
614	/*
615	* Get the registration export and call it.
616	*/
617	FNPDMVBOXDEVICESREGISTER *pfnVBoxDevicesRegister;
618	rc = PDMR3LdrGetSymbolR3(pVM, pszName, "VBoxDevicesRegister", (void **)&pfnVBoxDevicesRegister);
619	if (RT_SUCCESS(rc))
620	{
621	Log(("PDM: Calling VBoxDevicesRegister (%p) of %s (%s)\n", pfnVBoxDevicesRegister, pszName, pszFilename));
622	rc = pfnVBoxDevicesRegister(&pRegCB->Core, VBOX_VERSION);
623	if (RT_SUCCESS(rc))
624	Log(("PDM: Successfully loaded device module %s (%s).\n", pszName, pszFilename));
625	else
626	AssertMsgFailed(("VBoxDevicesRegister failed with rc=%Rrc for module %s (%s)\n", rc, pszName, pszFilename));
627	}
628	else
629	{
630	AssertMsgFailed(("Failed to locate 'VBoxDevicesRegister' in %s (%s) rc=%Rrc\n", pszName, pszFilename, rc));
631	if (rc == VERR_SYMBOL_NOT_FOUND)
632	rc = VERR_PDM_NO_REGISTRATION_EXPORT;
633	}
634	}
635	else
636	AssertMsgFailed(("Failed to load %s %s!\n", pszFilename, pszName));
637	return rc;
638	}
639
640
641	/**
642	* @interface_method_impl{PDMDEVREGCB,pfnRegister}
643	*/
644	static DECLCALLBACK(int) pdmR3DevReg_Register(PPDMDEVREGCB pCallbacks, PCPDMDEVREG pReg)
645	{
646	/*
647	* Validate the registration structure.
648	*/
649	Assert(pReg);
650	AssertMsgReturn(pReg->u32Version == PDM_DEVREG_VERSION,
651	("Unknown struct version %#x!\n", pReg->u32Version),
652	VERR_PDM_UNKNOWN_DEVREG_VERSION);
653
654	AssertMsgReturn( pReg->szName[0]
655	&& strlen(pReg->szName) < sizeof(pReg->szName)
656	&& pdmR3IsValidName(pReg->szName),
657	("Invalid name '%.*s'\n", sizeof(pReg->szName), pReg->szName),
658	VERR_PDM_INVALID_DEVICE_REGISTRATION);
659	AssertMsgReturn( !(pReg->fFlags & PDM_DEVREG_FLAGS_RC)
660	\|\| ( pReg->szRCMod[0]
661	&& strlen(pReg->szRCMod) < sizeof(pReg->szRCMod)),
662	("Invalid GC module name '%s' - (Device %s)\n", pReg->szRCMod, pReg->szName),
663	VERR_PDM_INVALID_DEVICE_REGISTRATION);
664	AssertMsgReturn( !(pReg->fFlags & PDM_DEVREG_FLAGS_R0)
665	\|\| ( pReg->szR0Mod[0]
666	&& strlen(pReg->szR0Mod) < sizeof(pReg->szR0Mod)),
667	("Invalid R0 module name '%s' - (Device %s)\n", pReg->szR0Mod, pReg->szName),
668	VERR_PDM_INVALID_DEVICE_REGISTRATION);
669	AssertMsgReturn((pReg->fFlags & PDM_DEVREG_FLAGS_HOST_BITS_MASK) == PDM_DEVREG_FLAGS_HOST_BITS_DEFAULT,
670	("Invalid host bits flags! fFlags=%#x (Device %s)\n", pReg->fFlags, pReg->szName),
671	VERR_PDM_INVALID_DEVICE_HOST_BITS);
672	AssertMsgReturn((pReg->fFlags & PDM_DEVREG_FLAGS_GUEST_BITS_MASK),
673	("Invalid guest bits flags! fFlags=%#x (Device %s)\n", pReg->fFlags, pReg->szName),
674	VERR_PDM_INVALID_DEVICE_REGISTRATION);
675	AssertMsgReturn(pReg->fClass,
676	("No class! (Device %s)\n", pReg->szName),
677	VERR_PDM_INVALID_DEVICE_REGISTRATION);
678	AssertMsgReturn(pReg->cMaxInstances > 0,
679	("Max instances %u! (Device %s)\n", pReg->cMaxInstances, pReg->szName),
680	VERR_PDM_INVALID_DEVICE_REGISTRATION);
681	AssertMsgReturn(pReg->cbInstance <= (uint32_t)(pReg->fFlags & (PDM_DEVREG_FLAGS_RC \| PDM_DEVREG_FLAGS_R0) ? 96 * _1K : _1M),
682	("Instance size %d bytes! (Device %s)\n", pReg->cbInstance, pReg->szName),
683	VERR_PDM_INVALID_DEVICE_REGISTRATION);
684	AssertMsgReturn(pReg->pfnConstruct,
685	("No constructor! (Device %s)\n", pReg->szName),
686	VERR_PDM_INVALID_DEVICE_REGISTRATION);
687	AssertLogRelMsgReturn((pReg->fFlags & PDM_DEVREG_FLAGS_GUEST_BITS_MASK) == PDM_DEVREG_FLAGS_GUEST_BITS_DEFAULT,
688	("PDM: Rejected device '%s' because it didn't match the guest bits.\n", pReg->szName),
689	VERR_PDM_INVALID_DEVICE_GUEST_BITS);
690	AssertLogRelMsg(pReg->u32VersionEnd == PDM_DEVREG_VERSION,
691	("u32VersionEnd=%#x, expected %#x. (szName=%s)\n",
692	pReg->u32VersionEnd, PDM_DEVREG_VERSION, pReg->szName));
693
694	/*
695	* Check for duplicate and find FIFO entry at the same time.
696	*/
697	PCPDMDEVREGCBINT pRegCB = (PCPDMDEVREGCBINT)pCallbacks;
698	PPDMDEV pDevPrev = NULL;
699	PPDMDEV pDev = pRegCB->pVM->pdm.s.pDevs;
700	for (; pDev; pDevPrev = pDev, pDev = pDev->pNext)
701	AssertMsgReturn(strcmp(pDev->pReg->szName, pReg->szName),
702	("Device '%s' already exists\n", pReg->szName),
703	VERR_PDM_DEVICE_NAME_CLASH);
704
705	/*
706	* Allocate new device structure, initialize and insert it into the list.
707	*/
708	int rc;
709	pDev = (PPDMDEV)MMR3HeapAlloc(pRegCB->pVM, MM_TAG_PDM_DEVICE, sizeof(*pDev));
710	if (pDev)
711	{
712	pDev->pNext = NULL;
713	pDev->cInstances = 0;
714	pDev->pInstances = NULL;
715	pDev->pReg = pReg;
716	pDev->cchName = (uint32_t)strlen(pReg->szName);
717	rc = CFGMR3QueryStringAllocDef( pRegCB->pCfgNode, "RCSearchPath", &pDev->pszRCSearchPath, NULL);
718	if (RT_SUCCESS(rc))
719	rc = CFGMR3QueryStringAllocDef(pRegCB->pCfgNode, "R0SearchPath", &pDev->pszR0SearchPath, NULL);
720	if (RT_SUCCESS(rc))
721	{
722	if (pDevPrev)
723	pDevPrev->pNext = pDev;
724	else
725	pRegCB->pVM->pdm.s.pDevs = pDev;
726	Log(("PDM: Registered device '%s'\n", pReg->szName));
727	return VINF_SUCCESS;
728	}
729
730	MMR3HeapFree(pDev);
731	}
732	else
733	rc = VERR_NO_MEMORY;
734	return rc;
735	}
736
737
738	/**
739	* Locates a LUN.
740	*
741	* @returns VBox status code.
742	* @param pVM The cross context VM structure.
743	* @param pszDevice Device name.
744	* @param iInstance Device instance.
745	* @param iLun The Logical Unit to obtain the interface of.
746	* @param ppLun Where to store the pointer to the LUN if found.
747	* @thread Try only do this in EMT...
748	*/
749	int pdmR3DevFindLun(PVM pVM, const char *pszDevice, unsigned iInstance, unsigned iLun, PPPDMLUN ppLun)
750	{
751	/*
752	* Iterate registered devices looking for the device.
753	*/
754	size_t cchDevice = strlen(pszDevice);
755	for (PPDMDEV pDev = pVM->pdm.s.pDevs; pDev; pDev = pDev->pNext)
756	{
757	if ( pDev->cchName == cchDevice
758	&& !memcmp(pDev->pReg->szName, pszDevice, cchDevice))
759	{
760	/*
761	* Iterate device instances.
762	*/
763	for (PPDMDEVINS pDevIns = pDev->pInstances; pDevIns; pDevIns = pDevIns->Internal.s.pPerDeviceNextR3)
764	{
765	if (pDevIns->iInstance == iInstance)
766	{
767	/*
768	* Iterate luns.
769	*/
770	for (PPDMLUN pLun = pDevIns->Internal.s.pLunsR3; pLun; pLun = pLun->pNext)
771	{
772	if (pLun->iLun == iLun)
773	{
774	*ppLun = pLun;
775	return VINF_SUCCESS;
776	}
777	}
778	return VERR_PDM_LUN_NOT_FOUND;
779	}
780	}
781	return VERR_PDM_DEVICE_INSTANCE_NOT_FOUND;
782	}
783	}
784	return VERR_PDM_DEVICE_NOT_FOUND;
785	}
786
787
788	/**
789	* Attaches a preconfigured driver to an existing device instance.
790	*
791	* This is used to change drivers and suchlike at runtime.
792	*
793	* @returns VBox status code.
794	* @param pUVM The user mode VM handle.
795	* @param pszDevice Device name.
796	* @param iInstance Device instance.
797	* @param iLun The Logical Unit to obtain the interface of.
798	* @param fFlags Flags, combination of the PDMDEVATT_FLAGS_* \#defines.
799	* @param ppBase Where to store the base interface pointer. Optional.
800	* @thread EMT
801	*/
802	VMMR3DECL(int) PDMR3DeviceAttach(PUVM pUVM, const char *pszDevice, unsigned iInstance, unsigned iLun, uint32_t fFlags, PPPDMIBASE ppBase)
803	{
804	UVM_ASSERT_VALID_EXT_RETURN(pUVM, VERR_INVALID_VM_HANDLE);
805	PVM pVM = pUVM->pVM;
806	VM_ASSERT_VALID_EXT_RETURN(pVM, VERR_INVALID_VM_HANDLE);
807	VM_ASSERT_EMT(pVM);
808	LogFlow(("PDMR3DeviceAttach: pszDevice=%p:{%s} iInstance=%d iLun=%d fFlags=%#x ppBase=%p\n",
809	pszDevice, pszDevice, iInstance, iLun, fFlags, ppBase));
810
811	/*
812	* Find the LUN in question.
813	*/
814	PPDMLUN pLun;
815	int rc = pdmR3DevFindLun(pVM, pszDevice, iInstance, iLun, &pLun);
816	if (RT_SUCCESS(rc))
817	{
818	/*
819	* Can we attach anything at runtime?
820	*/
821	PPDMDEVINS pDevIns = pLun->pDevIns;
822	if (pDevIns->pReg->pfnAttach)
823	{
824	if (!pLun->pTop)
825	{
826	PDMCritSectEnter(pDevIns->pCritSectRoR3, VERR_IGNORED);
827	rc = pDevIns->pReg->pfnAttach(pDevIns, iLun, fFlags);
828	PDMCritSectLeave(pDevIns->pCritSectRoR3);
829	}
830	else
831	rc = VERR_PDM_DRIVER_ALREADY_ATTACHED;
832	}
833	else
834	rc = VERR_PDM_DEVICE_NO_RT_ATTACH;
835
836	if (ppBase)
837	*ppBase = pLun->pTop ? &pLun->pTop->IBase : NULL;
838	}
839	else if (ppBase)
840	*ppBase = NULL;
841
842	if (ppBase)
843	LogFlow(("PDMR3DeviceAttach: returns %Rrc ppBase=%p\n", rc, ppBase));
844	else
845	LogFlow(("PDMR3DeviceAttach: returns %Rrc\n", rc));
846	return rc;
847	}
848
849
850	/**
851	* Detaches a driver chain from an existing device instance.
852	*
853	* This is used to change drivers and suchlike at runtime.
854	*
855	* @returns VBox status code.
856	* @param pUVM The user mode VM handle.
857	* @param pszDevice Device name.
858	* @param iInstance Device instance.
859	* @param iLun The Logical Unit to obtain the interface of.
860	* @param fFlags Flags, combination of the PDMDEVATT_FLAGS_* \#defines.
861	* @thread EMT
862	*/
863	VMMR3DECL(int) PDMR3DeviceDetach(PUVM pUVM, const char *pszDevice, unsigned iInstance, unsigned iLun, uint32_t fFlags)
864	{
865	return PDMR3DriverDetach(pUVM, pszDevice, iInstance, iLun, NULL, 0, fFlags);
866	}
867
868
869	/**
870	* References the critical section associated with a device for the use by a
871	* timer or similar created by the device.
872	*
873	* @returns Pointer to the critical section.
874	* @param pVM The cross context VM structure.
875	* @param pDevIns The device instance in question.
876	*
877	* @internal
878	*/
879	VMMR3_INT_DECL(PPDMCRITSECT) PDMR3DevGetCritSect(PVM pVM, PPDMDEVINS pDevIns)
880	{
881	VM_ASSERT_EMT(pVM); RT_NOREF_PV(pVM);
882	VM_ASSERT_STATE(pVM, VMSTATE_CREATING);
883	AssertPtr(pDevIns);
884
885	PPDMCRITSECT pCritSect = pDevIns->pCritSectRoR3;
886	AssertPtr(pCritSect);
887	pCritSect->s.fUsedByTimerOrSimilar = true;
888
889	return pCritSect;
890	}
891
892
893	/**
894	* Attaches a preconfigured driver to an existing device or driver instance.
895	*
896	* This is used to change drivers and suchlike at runtime. The driver or device
897	* at the end of the chain will be told to attach to whatever is configured
898	* below it.
899	*
900	* @returns VBox status code.
901	* @param pUVM The user mode VM handle.
902	* @param pszDevice Device name.
903	* @param iInstance Device instance.
904	* @param iLun The Logical Unit to obtain the interface of.
905	* @param fFlags Flags, combination of the PDMDEVATT_FLAGS_* \#defines.
906	* @param ppBase Where to store the base interface pointer. Optional.
907	*
908	* @thread EMT
909	*/
910	VMMR3DECL(int) PDMR3DriverAttach(PUVM pUVM, const char *pszDevice, unsigned iInstance, unsigned iLun, uint32_t fFlags, PPPDMIBASE ppBase)
911	{
912	LogFlow(("PDMR3DriverAttach: pszDevice=%p:{%s} iInstance=%d iLun=%d fFlags=%#x ppBase=%p\n",
913	pszDevice, pszDevice, iInstance, iLun, fFlags, ppBase));
914	UVM_ASSERT_VALID_EXT_RETURN(pUVM, VERR_INVALID_VM_HANDLE);
915	PVM pVM = pUVM->pVM;
916	VM_ASSERT_VALID_EXT_RETURN(pVM, VERR_INVALID_VM_HANDLE);
917	VM_ASSERT_EMT(pVM);
918
919	if (ppBase)
920	*ppBase = NULL;
921
922	/*
923	* Find the LUN in question.
924	*/
925	PPDMLUN pLun;
926	int rc = pdmR3DevFindLun(pVM, pszDevice, iInstance, iLun, &pLun);
927	if (RT_SUCCESS(rc))
928	{
929	/*
930	* Anything attached to the LUN?
931	*/
932	PPDMDRVINS pDrvIns = pLun->pTop;
933	if (!pDrvIns)
934	{
935	/* No, ask the device to attach to the new stuff. */
936	PPDMDEVINS pDevIns = pLun->pDevIns;
937	if (pDevIns->pReg->pfnAttach)
938	{
939	PDMCritSectEnter(pDevIns->pCritSectRoR3, VERR_IGNORED);
940	rc = pDevIns->pReg->pfnAttach(pDevIns, iLun, fFlags);
941	if (RT_SUCCESS(rc) && ppBase)
942	*ppBase = pLun->pTop ? &pLun->pTop->IBase : NULL;
943	PDMCritSectLeave(pDevIns->pCritSectRoR3);
944	}
945	else
946	rc = VERR_PDM_DEVICE_NO_RT_ATTACH;
947	}
948	else
949	{
950	/* Yes, find the bottom most driver and ask it to attach to the new stuff. */
951	while (pDrvIns->Internal.s.pDown)
952	pDrvIns = pDrvIns->Internal.s.pDown;
953	if (pDrvIns->pReg->pfnAttach)
954	{
955	rc = pDrvIns->pReg->pfnAttach(pDrvIns, fFlags);
956	if (RT_SUCCESS(rc) && ppBase)
957	*ppBase = pDrvIns->Internal.s.pDown
958	? &pDrvIns->Internal.s.pDown->IBase
959	: NULL;
960	}
961	else
962	rc = VERR_PDM_DRIVER_NO_RT_ATTACH;
963	}
964	}
965
966	if (ppBase)
967	LogFlow(("PDMR3DriverAttach: returns %Rrc ppBase=%p\n", rc, ppBase));
968	else
969	LogFlow(("PDMR3DriverAttach: returns %Rrc\n", rc));
970	return rc;
971	}
972
973
974	/**
975	* Detaches the specified driver instance.
976	*
977	* This is used to replumb drivers at runtime for simulating hot plugging and
978	* media changes.
979	*
980	* This is a superset of PDMR3DeviceDetach. It allows detaching drivers from
981	* any driver or device by specifying the driver to start detaching at. The
982	* only prerequisite is that the driver or device above implements the
983	* pfnDetach callback (PDMDRVREG / PDMDEVREG).
984	*
985	* @returns VBox status code.
986	* @param pUVM The user mode VM handle.
987	* @param pszDevice Device name.
988	* @param iDevIns Device instance.
989	* @param iLun The Logical Unit in which to look for the driver.
990	* @param pszDriver The name of the driver which to detach. If NULL
991	* then the entire driver chain is detatched.
992	* @param iOccurrence The occurrence of that driver in the chain. This is
993	* usually 0.
994	* @param fFlags Flags, combination of the PDMDEVATT_FLAGS_* \#defines.
995	* @thread EMT
996	*/
997	VMMR3DECL(int) PDMR3DriverDetach(PUVM pUVM, const char *pszDevice, unsigned iDevIns, unsigned iLun,
998	const char *pszDriver, unsigned iOccurrence, uint32_t fFlags)
999	{
1000	LogFlow(("PDMR3DriverDetach: pszDevice=%p:{%s} iDevIns=%u iLun=%u pszDriver=%p:{%s} iOccurrence=%u fFlags=%#x\n",
1001	pszDevice, pszDevice, iDevIns, iLun, pszDriver, pszDriver, iOccurrence, fFlags));
1002	UVM_ASSERT_VALID_EXT_RETURN(pUVM, VERR_INVALID_VM_HANDLE);
1003	PVM pVM = pUVM->pVM;
1004	VM_ASSERT_VALID_EXT_RETURN(pVM, VERR_INVALID_VM_HANDLE);
1005	VM_ASSERT_EMT(pVM);
1006	AssertPtr(pszDevice);
1007	AssertPtrNull(pszDriver);
1008	Assert(iOccurrence == 0 \|\| pszDriver);
1009	Assert(!(fFlags & ~(PDM_TACH_FLAGS_NOT_HOT_PLUG)));
1010
1011	/*
1012	* Find the LUN in question.
1013	*/
1014	PPDMLUN pLun;
1015	int rc = pdmR3DevFindLun(pVM, pszDevice, iDevIns, iLun, &pLun);
1016	if (RT_SUCCESS(rc))
1017	{
1018	/*
1019	* Locate the driver.
1020	*/
1021	PPDMDRVINS pDrvIns = pLun->pTop;
1022	if (pDrvIns)
1023	{
1024	if (pszDriver)
1025	{
1026	while (pDrvIns)
1027	{
1028	if (!strcmp(pDrvIns->pReg->szName, pszDriver))
1029	{
1030	if (iOccurrence == 0)
1031	break;
1032	iOccurrence--;
1033	}
1034	pDrvIns = pDrvIns->Internal.s.pDown;
1035	}
1036	}
1037	if (pDrvIns)
1038	rc = pdmR3DrvDetach(pDrvIns, fFlags);
1039	else
1040	rc = VERR_PDM_DRIVER_INSTANCE_NOT_FOUND;
1041	}
1042	else
1043	rc = VINF_PDM_NO_DRIVER_ATTACHED_TO_LUN;
1044	}
1045
1046	LogFlow(("PDMR3DriverDetach: returns %Rrc\n", rc));
1047	return rc;
1048	}
1049
1050
1051	/**
1052	* Runtime detach and reattach of a new driver chain or sub chain.
1053	*
1054	* This is intended to be called on a non-EMT thread, this will instantiate the
1055	* new driver (sub-)chain, and then the EMTs will do the actual replumbing. The
1056	* destruction of the old driver chain will be taken care of on the calling
1057	* thread.
1058	*
1059	* @returns VBox status code.
1060	* @param pUVM The user mode VM handle.
1061	* @param pszDevice Device name.
1062	* @param iDevIns Device instance.
1063	* @param iLun The Logical Unit in which to look for the driver.
1064	* @param pszDriver The name of the driver which to detach and replace.
1065	* If NULL then the entire driver chain is to be
1066	* reattached.
1067	* @param iOccurrence The occurrence of that driver in the chain. This is
1068	* usually 0.
1069	* @param fFlags Flags, combination of the PDMDEVATT_FLAGS_* \#defines.
1070	* @param pCfg The configuration of the new driver chain that is
1071	* going to be attached. The subtree starts with the
1072	* node containing a Driver key, a Config subtree and
1073	* optionally an AttachedDriver subtree.
1074	* If this parameter is NULL, then this call will work
1075	* like at a non-pause version of PDMR3DriverDetach.
1076	* @param ppBase Where to store the base interface pointer to the new
1077	* driver. Optional.
1078	*
1079	* @thread Any thread. The EMTs will be involved at some point though.
1080	*/
1081	VMMR3DECL(int) PDMR3DriverReattach(PUVM pUVM, const char *pszDevice, unsigned iDevIns, unsigned iLun,
1082	const char *pszDriver, unsigned iOccurrence, uint32_t fFlags,
1083	PCFGMNODE pCfg, PPPDMIBASE ppBase)
1084	{
1085	NOREF(pUVM); NOREF(pszDevice); NOREF(iDevIns); NOREF(iLun); NOREF(pszDriver); NOREF(iOccurrence);
1086	NOREF(fFlags); NOREF(pCfg); NOREF(ppBase);
1087	return VERR_NOT_IMPLEMENTED;
1088	}
1089

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source: vbox/trunk/src/VBox/VMM/VMMR3/PDMDevice.cpp@ 71800

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