PDMR0Device.cpp@ 87758

Last change on this file since 87758 was 84459, checked in by vboxsync, 5 years ago

VMM/PDM: DBGF even tracing integration, bugref:9210

Integrates the new DBGF event tracing framework into PDM
devices. The new CFGM key "TracingEnabled" for a device
instance enables tracing using DBGF. A special tracing variant
of the PDM device helper is provided.

Disabled by default for now, enable with VBOX_WITH_DBGF_TRACING

Property svn:eol-style set to native
Property svn:keywords set to Id Revision

File size: 35.7 KB

Line
1	/* $Id: PDMR0Device.cpp 84459 2020-05-22 12:55:07Z vboxsync $ */
2	/** @file
3	* PDM - Pluggable Device and Driver Manager, R0 Device parts.
4	*/
5
6	/*
7	* Copyright (C) 2006-2020 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	#define PDMPCIDEV_INCLUDE_PRIVATE /* Hack to get pdmpcidevint.h included at the right point. */
24	#include "PDMInternal.h"
25	#include <VBox/vmm/pdm.h>
26	#include <VBox/vmm/apic.h>
27	#include <VBox/vmm/mm.h>
28	#include <VBox/vmm/pgm.h>
29	#include <VBox/vmm/gvm.h>
30	#include <VBox/vmm/vmm.h>
31	#include <VBox/vmm/hm.h>
32	#include <VBox/vmm/vmcc.h>
33	#include <VBox/vmm/gvmm.h>
34
35	#include <VBox/log.h>
36	#include <VBox/err.h>
37	#include <VBox/msi.h>
38	#include <VBox/sup.h>
39	#include <iprt/asm.h>
40	#include <iprt/assert.h>
41	#include <iprt/ctype.h>
42	#include <iprt/mem.h>
43	#include <iprt/memobj.h>
44	#include <iprt/process.h>
45	#include <iprt/string.h>
46
47	#include "dtrace/VBoxVMM.h"
48	#include "PDMInline.h"
49
50
51	/*********************************************************************************************************************************
52	* Global Variables *
53	*********************************************************************************************************************************/
54	RT_C_DECLS_BEGIN
55	extern DECLEXPORT(const PDMDEVHLPR0) g_pdmR0DevHlp;
56	#ifdef VBOX_WITH_DBGF_TRACING
57	extern DECLEXPORT(const PDMDEVHLPR0) g_pdmR0DevHlpTracing;
58	#endif
59	extern DECLEXPORT(const PDMPICHLP) g_pdmR0PicHlp;
60	extern DECLEXPORT(const PDMIOAPICHLP) g_pdmR0IoApicHlp;
61	extern DECLEXPORT(const PDMPCIHLPR0) g_pdmR0PciHlp;
62	extern DECLEXPORT(const PDMIOMMUHLPR0) g_pdmR0IommuHlp;
63	extern DECLEXPORT(const PDMHPETHLPR0) g_pdmR0HpetHlp;
64	extern DECLEXPORT(const PDMPCIRAWHLPR0) g_pdmR0PciRawHlp;
65	RT_C_DECLS_END
66
67	/** List of PDMDEVMODREGR0 structures protected by the loader lock. */
68	static RTLISTANCHOR g_PDMDevModList;
69
70
71	/**
72	* Pointer to the ring-0 device registrations for VMMR0.
73	*/
74	static const PDMDEVREGR0 *g_apVMM0DevRegs[] =
75	{
76	&g_DeviceAPIC,
77	};
78
79	/**
80	* Module device registration record for VMMR0.
81	*/
82	static PDMDEVMODREGR0 g_VBoxDDR0ModDevReg =
83	{
84	/* .u32Version = */ PDM_DEVMODREGR0_VERSION,
85	/* .cDevRegs = */ RT_ELEMENTS(g_apVMM0DevRegs),
86	/* .papDevRegs = */ &g_apVMM0DevRegs[0],
87	/* .hMod = */ NULL,
88	/* .ListEntry = */ { NULL, NULL },
89	};
90
91
92	/*********************************************************************************************************************************
93	* Internal Functions *
94	*********************************************************************************************************************************/
95
96
97	/**
98	* Initializes the global ring-0 PDM data.
99	*/
100	VMMR0_INT_DECL(void) PDMR0Init(void *hMod)
101	{
102	RTListInit(&g_PDMDevModList);
103	g_VBoxDDR0ModDevReg.hMod = hMod;
104	RTListAppend(&g_PDMDevModList, &g_VBoxDDR0ModDevReg.ListEntry);
105	}
106
107
108	/**
109	* Used by PDMR0CleanupVM to destroy a device instance.
110	*
111	* This is done during VM cleanup so that we're sure there are no active threads
112	* inside the device code.
113	*
114	* @param pGVM The global (ring-0) VM structure.
115	* @param pDevIns The device instance.
116	* @param idxR0Device The device instance handle.
117	*/
118	static int pdmR0DeviceDestroy(PGVM pGVM, PPDMDEVINSR0 pDevIns, uint32_t idxR0Device)
119	{
120	/*
121	* Assert sanity.
122	*/
123	Assert(idxR0Device < pGVM->pdmr0.s.cDevInstances);
124	AssertPtrReturn(pDevIns, VERR_INVALID_HANDLE);
125	Assert(pDevIns->u32Version == PDM_DEVINSR0_VERSION);
126	Assert(pDevIns->Internal.s.idxR0Device == idxR0Device);
127
128	/*
129	* Call the final destructor if there is one.
130	*/
131	if (pDevIns->pReg->pfnFinalDestruct)
132	pDevIns->pReg->pfnFinalDestruct(pDevIns);
133	pDevIns->u32Version = ~PDM_DEVINSR0_VERSION;
134
135	/*
136	* Remove the device from the instance table.
137	*/
138	Assert(pGVM->pdmr0.s.apDevInstances[idxR0Device] == pDevIns);
139	pGVM->pdmr0.s.apDevInstances[idxR0Device] = NULL;
140	if (idxR0Device + 1 == pGVM->pdmr0.s.cDevInstances)
141	pGVM->pdmr0.s.cDevInstances = idxR0Device;
142
143	/*
144	* Free the DBGF tracing tracking structures if necessary.
145	*/
146	if (pDevIns->Internal.s.hDbgfTraceEvtSrc != NIL_DBGFTRACEREVTSRC)
147	{
148	RTR0MemObjFree(pDevIns->Internal.s.hDbgfTraceObj, true);
149	pDevIns->Internal.s.hDbgfTraceObj = NIL_RTR0MEMOBJ;
150	}
151
152	/*
153	* Free the ring-3 mapping and instance memory.
154	*/
155	RTR0MEMOBJ hMemObj = pDevIns->Internal.s.hMapObj;
156	pDevIns->Internal.s.hMapObj = NIL_RTR0MEMOBJ;
157	RTR0MemObjFree(hMemObj, true);
158
159	hMemObj = pDevIns->Internal.s.hMemObj;
160	pDevIns->Internal.s.hMemObj = NIL_RTR0MEMOBJ;
161	RTR0MemObjFree(hMemObj, true);
162
163	return VINF_SUCCESS;
164	}
165
166
167	/**
168	* Initializes the per-VM data for the PDM.
169	*
170	* This is called from under the GVMM lock, so it only need to initialize the
171	* data so PDMR0CleanupVM and others will work smoothly.
172	*
173	* @param pGVM Pointer to the global VM structure.
174	*/
175	VMMR0_INT_DECL(void) PDMR0InitPerVMData(PGVM pGVM)
176	{
177	AssertCompile(sizeof(pGVM->pdm.s) <= sizeof(pGVM->pdm.padding));
178	AssertCompile(sizeof(pGVM->pdmr0.s) <= sizeof(pGVM->pdmr0.padding));
179
180	pGVM->pdmr0.s.cDevInstances = 0;
181	}
182
183
184	/**
185	* Cleans up any loose ends before the GVM structure is destroyed.
186	*/
187	VMMR0_INT_DECL(void) PDMR0CleanupVM(PGVM pGVM)
188	{
189	uint32_t i = pGVM->pdmr0.s.cDevInstances;
190	while (i-- > 0)
191	{
192	PPDMDEVINSR0 pDevIns = pGVM->pdmr0.s.apDevInstances[i];
193	if (pDevIns)
194	pdmR0DeviceDestroy(pGVM, pDevIns, i);
195	}
196	}
197
198
199	/**
200	* Worker for PDMR0DeviceCreate that does the actual instantiation.
201	*
202	* Allocates a memory object and divides it up as follows:
203	* @verbatim
204	--------------------------------------
205	ring-0 devins
206	--------------------------------------
207	ring-0 instance data
208	--------------------------------------
209	ring-0 PCI device data (optional) ??
210	--------------------------------------
211	page alignment padding
212	--------------------------------------
213	ring-3 devins
214	--------------------------------------
215	ring-3 instance data
216	--------------------------------------
217	ring-3 PCI device data (optional) ??
218	--------------------------------------
219	[page alignment padding ] -
220	[--------------------------------------] \
221	[raw-mode devins ] \
222	[--------------------------------------] - Optional, only when raw-mode is enabled.
223	[raw-mode instance data ] /
224	[--------------------------------------] /
225	[raw-mode PCI device data (optional)?? ] -
226	--------------------------------------
227	shared instance data
228	--------------------------------------
229	default crit section
230	--------------------------------------
231	shared PCI device data (optional)
232	--------------------------------------
233	@endverbatim
234	*
235	* @returns VBox status code.
236	* @param pGVM The global (ring-0) VM structure.
237	* @param pDevReg The device registration structure.
238	* @param iInstance The device instance number.
239	* @param cbInstanceR3 The size of the ring-3 instance data.
240	* @param cbInstanceRC The size of the raw-mode instance data.
241	* @param hMod The module implementing the device.
242	* @param hDbgfTraceEvtSrc The DBGF tarcer event source handle.
243	* @param RCPtrMapping The raw-mode context mapping address, NIL_RTGCPTR if
244	* not to include raw-mode.
245	* @param ppDevInsR3 Where to return the ring-3 device instance address.
246	* @thread EMT(0)
247	*/
248	static int pdmR0DeviceCreateWorker(PGVM pGVM, PCPDMDEVREGR0 pDevReg, uint32_t iInstance, uint32_t cbInstanceR3,
249	uint32_t cbInstanceRC, RTRGPTR RCPtrMapping, DBGFTRACEREVTSRC hDbgfTraceEvtSrc,
250	void hMod, PPDMDEVINSR3 ppDevInsR3)
251	{
252	/*
253	* Check that the instance number isn't a duplicate.
254	*/
255	for (size_t i = 0; i < pGVM->pdmr0.s.cDevInstances; i++)
256	{
257	PPDMDEVINS pCur = pGVM->pdmr0.s.apDevInstances[i];
258	AssertLogRelReturn(!pCur \|\| pCur->pReg != pDevReg \|\| pCur->iInstance != iInstance, VERR_DUPLICATE);
259	}
260
261	/*
262	* Figure out how much memory we need and allocate it.
263	*/
264	uint32_t const cbRing0 = RT_ALIGN_32(RT_UOFFSETOF(PDMDEVINSR0, achInstanceData) + pDevReg->cbInstanceCC, PAGE_SIZE);
265	uint32_t const cbRing3 = RT_ALIGN_32(RT_UOFFSETOF(PDMDEVINSR3, achInstanceData) + cbInstanceR3,
266	RCPtrMapping != NIL_RTRGPTR ? PAGE_SIZE : 64);
267	uint32_t const cbRC = RCPtrMapping != NIL_RTRGPTR ? 0
268	: RT_ALIGN_32(RT_UOFFSETOF(PDMDEVINSRC, achInstanceData) + cbInstanceRC, 64);
269	uint32_t const cbShared = RT_ALIGN_32(pDevReg->cbInstanceShared, 64);
270	uint32_t const cbCritSect = RT_ALIGN_32(sizeof(PDMCRITSECT), 64);
271	uint32_t const cbMsixState = RT_ALIGN_32(pDevReg->cMaxMsixVectors * 16 + (pDevReg->cMaxMsixVectors + 7) / 8, _4K);
272	uint32_t const cbPciDev = RT_ALIGN_32(RT_UOFFSETOF_DYN(PDMPCIDEV, abMsixState[cbMsixState]), 64);
273	uint32_t const cPciDevs = RT_MIN(pDevReg->cMaxPciDevices, 8);
274	uint32_t const cbPciDevs = cbPciDev * cPciDevs;
275	uint32_t const cbTotal = RT_ALIGN_32(cbRing0 + cbRing3 + cbRC + cbShared + cbCritSect + cbPciDevs, PAGE_SIZE);
276	AssertLogRelMsgReturn(cbTotal <= PDM_MAX_DEVICE_INSTANCE_SIZE,
277	("Instance of '%s' is too big: cbTotal=%u, max %u\n",
278	pDevReg->szName, cbTotal, PDM_MAX_DEVICE_INSTANCE_SIZE),
279	VERR_OUT_OF_RANGE);
280
281	RTR0MEMOBJ hMemObj;
282	int rc = RTR0MemObjAllocPage(&hMemObj, cbTotal, false /fExecutable/);
283	if (RT_FAILURE(rc))
284	return rc;
285	RT_BZERO(RTR0MemObjAddress(hMemObj), cbTotal);
286
287	/* Map it. */
288	RTR0MEMOBJ hMapObj;
289	rc = RTR0MemObjMapUserEx(&hMapObj, hMemObj, (RTR3PTR)-1, 0, RTMEM_PROT_READ \| RTMEM_PROT_WRITE, RTR0ProcHandleSelf(),
290	cbRing0, cbTotal - cbRing0);
291	if (RT_SUCCESS(rc))
292	{
293	PPDMDEVINSR0 pDevIns = (PPDMDEVINSR0)RTR0MemObjAddress(hMemObj);
294	struct PDMDEVINSR3 pDevInsR3 = (struct PDMDEVINSR3 )((uint8_t *)pDevIns + cbRing0);
295
296	/*
297	* Initialize the ring-0 instance.
298	*/
299	pDevIns->u32Version = PDM_DEVINSR0_VERSION;
300	pDevIns->iInstance = iInstance;
301	#ifdef VBOX_WITH_DBGF_TRACING
302	pDevIns->pHlpR0 = hDbgfTraceEvtSrc == NIL_DBGFTRACEREVTSRC ? &g_pdmR0DevHlp : &g_pdmR0DevHlpTracing;
303	#else
304	pDevIns->pHlpR0 = &g_pdmR0DevHlp;
305	#endif
306	pDevIns->pvInstanceDataR0 = (uint8_t *)pDevIns + cbRing0 + cbRing3 + cbRC;
307	pDevIns->pvInstanceDataForR0 = &pDevIns->achInstanceData[0];
308	pDevIns->pCritSectRoR0 = (PPDMCRITSECT)((uint8_t *)pDevIns->pvInstanceDataR0 + cbShared);
309	pDevIns->pReg = pDevReg;
310	pDevIns->pDevInsForR3 = RTR0MemObjAddressR3(hMapObj);
311	pDevIns->pDevInsForR3R0 = pDevInsR3;
312	pDevIns->pvInstanceDataForR3R0 = &pDevInsR3->achInstanceData[0];
313	pDevIns->cbPciDev = cbPciDev;
314	pDevIns->cPciDevs = cPciDevs;
315	for (uint32_t iPciDev = 0; iPciDev < cPciDevs; iPciDev++)
316	{
317	/* Note! PDMDevice.cpp has a copy of this code. Keep in sync. */
318	PPDMPCIDEV pPciDev = (PPDMPCIDEV)((uint8_t )pDevIns->pCritSectRoR0 + cbCritSect + cbPciDev iPciDev);
319	if (iPciDev < RT_ELEMENTS(pDevIns->apPciDevs))
320	pDevIns->apPciDevs[iPciDev] = pPciDev;
321	pPciDev->cbConfig = _4K;
322	pPciDev->cbMsixState = cbMsixState;
323	pPciDev->idxSubDev = (uint16_t)iPciDev;
324	pPciDev->Int.s.idxSubDev = (uint16_t)iPciDev;
325	pPciDev->u32Magic = PDMPCIDEV_MAGIC;
326	}
327	pDevIns->Internal.s.pGVM = pGVM;
328	pDevIns->Internal.s.pRegR0 = pDevReg;
329	pDevIns->Internal.s.hMod = hMod;
330	pDevIns->Internal.s.hMemObj = hMemObj;
331	pDevIns->Internal.s.hMapObj = hMapObj;
332	pDevIns->Internal.s.pInsR3R0 = pDevInsR3;
333	pDevIns->Internal.s.pIntR3R0 = &pDevInsR3->Internal.s;
334	pDevIns->Internal.s.hDbgfTraceEvtSrc = hDbgfTraceEvtSrc;
335
336	/*
337	* Initialize the ring-3 instance data as much as we can.
338	* Note! PDMDevice.cpp does this job for ring-3 only devices. Keep in sync.
339	*/
340	pDevInsR3->u32Version = PDM_DEVINSR3_VERSION;
341	pDevInsR3->iInstance = iInstance;
342	pDevInsR3->cbRing3 = cbTotal - cbRing0;
343	pDevInsR3->fR0Enabled = true;
344	pDevInsR3->fRCEnabled = RCPtrMapping != NIL_RTRGPTR;
345	pDevInsR3->pvInstanceDataR3 = pDevIns->pDevInsForR3 + cbRing3 + cbRC;
346	pDevInsR3->pvInstanceDataForR3 = pDevIns->pDevInsForR3 + RT_UOFFSETOF(PDMDEVINSR3, achInstanceData);
347	pDevInsR3->pCritSectRoR3 = pDevIns->pDevInsForR3 + cbRing3 + cbRC + cbShared;
348	pDevInsR3->pDevInsR0RemoveMe = pDevIns;
349	pDevInsR3->pvInstanceDataR0 = pDevIns->pvInstanceDataR0;
350	pDevInsR3->pvInstanceDataRC = RCPtrMapping == NIL_RTRGPTR
351	? NIL_RTRGPTR : pDevIns->pDevInsForRC + RT_UOFFSETOF(PDMDEVINSRC, achInstanceData);
352	pDevInsR3->pDevInsForRC = pDevIns->pDevInsForRC;
353	pDevInsR3->pDevInsForRCR3 = pDevIns->pDevInsForR3 + cbRing3;
354	pDevInsR3->pDevInsForRCR3 = pDevInsR3->pDevInsForRCR3 + RT_UOFFSETOF(PDMDEVINSRC, achInstanceData);
355	pDevInsR3->cbPciDev = cbPciDev;
356	pDevInsR3->cPciDevs = cPciDevs;
357	for (uint32_t i = 0; i < RT_MIN(cPciDevs, RT_ELEMENTS(pDevIns->apPciDevs)); i++)
358	pDevInsR3->apPciDevs[i] = pDevInsR3->pCritSectRoR3 + cbCritSect + cbPciDev * i;
359
360	pDevInsR3->Internal.s.pVMR3 = pGVM->pVMR3;
361	pDevInsR3->Internal.s.fIntFlags = RCPtrMapping == NIL_RTRGPTR ? PDMDEVINSINT_FLAGS_R0_ENABLED
362	: PDMDEVINSINT_FLAGS_R0_ENABLED \| PDMDEVINSINT_FLAGS_RC_ENABLED;
363	pDevInsR3->Internal.s.hDbgfTraceEvtSrc = hDbgfTraceEvtSrc;
364
365	/*
366	* Initialize the raw-mode instance data as much as possible.
367	*/
368	if (RCPtrMapping != NIL_RTRGPTR)
369	{
370	struct PDMDEVINSRC *pDevInsRC = RCPtrMapping == NIL_RTRGPTR ? NULL
371	: (struct PDMDEVINSRC )((uint8_t )pDevIns + cbRing0 + cbRing3);
372
373	pDevIns->pDevInsForRC = RCPtrMapping;
374	pDevIns->pDevInsForRCR0 = pDevInsRC;
375	pDevIns->pvInstanceDataForRCR0 = &pDevInsRC->achInstanceData[0];
376
377	pDevInsRC->u32Version = PDM_DEVINSRC_VERSION;
378	pDevInsRC->iInstance = iInstance;
379	pDevInsRC->pvInstanceDataRC = pDevIns->pDevInsForRC + cbRC;
380	pDevInsRC->pvInstanceDataForRC = pDevIns->pDevInsForRC + RT_UOFFSETOF(PDMDEVINSRC, achInstanceData);
381	pDevInsRC->pCritSectRoRC = pDevIns->pDevInsForRC + cbRC + cbShared;
382	pDevInsRC->cbPciDev = cbPciDev;
383	pDevInsRC->cPciDevs = cPciDevs;
384	for (uint32_t i = 0; i < RT_MIN(cPciDevs, RT_ELEMENTS(pDevIns->apPciDevs)); i++)
385	pDevInsRC->apPciDevs[i] = pDevInsRC->pCritSectRoRC + cbCritSect + cbPciDev * i;
386
387	pDevInsRC->Internal.s.pVMRC = pGVM->pVMRC;
388	}
389
390	/*
391	* If the device is being traced we have to set up a single page for tracking
392	* I/O and MMIO region registrations so we can inject our own handlers.
393	*/
394	if (hDbgfTraceEvtSrc != NIL_DBGFTRACEREVTSRC)
395	{
396	pDevIns->Internal.s.hDbgfTraceObj = NIL_RTR0MEMOBJ;
397	rc = RTR0MemObjAllocPage(&pDevIns->Internal.s.hDbgfTraceObj, PDM_MAX_DEVICE_DBGF_TRACING_TRACK, false /fExecutable/);
398	if (RT_SUCCESS(rc))
399	{
400	pDevIns->Internal.s.paDbgfTraceTrack = (PPDMDEVINSDBGFTRACK)RTR0MemObjAddress(pDevIns->Internal.s.hDbgfTraceObj);
401	pDevIns->Internal.s.idxDbgfTraceTrackNext = 0;
402	pDevIns->Internal.s.cDbgfTraceTrackMax = PDM_MAX_DEVICE_DBGF_TRACING_TRACK / sizeof(PDMDEVINSDBGFTRACK);
403	RT_BZERO(pDevIns->Internal.s.paDbgfTraceTrack, PDM_MAX_DEVICE_DBGF_TRACING_TRACK);
404	}
405	}
406
407	if (RT_SUCCESS(rc))
408	{
409	/*
410	* Add to the device instance array and set its handle value.
411	*/
412	AssertCompile(sizeof(pGVM->pdmr0.padding) == sizeof(pGVM->pdmr0));
413	uint32_t idxR0Device = pGVM->pdmr0.s.cDevInstances;
414	if (idxR0Device < RT_ELEMENTS(pGVM->pdmr0.s.apDevInstances))
415	{
416	pGVM->pdmr0.s.apDevInstances[idxR0Device] = pDevIns;
417	pGVM->pdmr0.s.cDevInstances = idxR0Device + 1;
418	pDevIns->Internal.s.idxR0Device = idxR0Device;
419	pDevInsR3->Internal.s.idxR0Device = idxR0Device;
420
421	/*
422	* Call the early constructor if present.
423	*/
424	if (pDevReg->pfnEarlyConstruct)
425	rc = pDevReg->pfnEarlyConstruct(pDevIns);
426	if (RT_SUCCESS(rc))
427	{
428	/*
429	* We're done.
430	*/
431	*ppDevInsR3 = RTR0MemObjAddressR3(hMapObj);
432	return rc;
433	}
434
435	/*
436	* Bail out.
437	*/
438	if (pDevIns->pReg->pfnFinalDestruct)
439	pDevIns->pReg->pfnFinalDestruct(pDevIns);
440
441	pGVM->pdmr0.s.apDevInstances[idxR0Device] = NULL;
442	Assert(pGVM->pdmr0.s.cDevInstances == idxR0Device + 1);
443	pGVM->pdmr0.s.cDevInstances = idxR0Device;
444	}
445	}
446
447	if ( hDbgfTraceEvtSrc != NIL_DBGFTRACEREVTSRC
448	&& pDevIns->Internal.s.hDbgfTraceObj != NIL_RTR0MEMOBJ)
449	RTR0MemObjFree(pDevIns->Internal.s.hDbgfTraceObj, true);
450
451	RTR0MemObjFree(hMapObj, true);
452	}
453	RTR0MemObjFree(hMemObj, true);
454	return rc;
455	}
456
457
458	/**
459	* Used by ring-3 PDM to create a device instance that operates both in ring-3
460	* and ring-0.
461	*
462	* Creates an instance of a device (for both ring-3 and ring-0, and optionally
463	* raw-mode context).
464	*
465	* @returns VBox status code.
466	* @param pGVM The global (ring-0) VM structure.
467	* @param pReq Pointer to the request buffer.
468	* @thread EMT(0)
469	*/
470	VMMR0_INT_DECL(int) PDMR0DeviceCreateReqHandler(PGVM pGVM, PPDMDEVICECREATEREQ pReq)
471	{
472	LogFlow(("PDMR0DeviceCreateReqHandler: %s in %s\n", pReq->szDevName, pReq->szModName));
473
474	/*
475	* Validate the request.
476	*/
477	AssertReturn(pReq->Hdr.cbReq == sizeof(*pReq), VERR_INVALID_PARAMETER);
478	pReq->pDevInsR3 = NIL_RTR3PTR;
479
480	int rc = GVMMR0ValidateGVMandEMT(pGVM, 0);
481	AssertRCReturn(rc, rc);
482
483	AssertReturn(pReq->fFlags != 0, VERR_INVALID_FLAGS);
484	AssertReturn(pReq->fClass != 0, VERR_WRONG_TYPE);
485	AssertReturn(pReq->uSharedVersion != 0, VERR_INVALID_PARAMETER);
486	AssertReturn(pReq->cbInstanceShared != 0, VERR_INVALID_PARAMETER);
487	size_t const cchDevName = RTStrNLen(pReq->szDevName, sizeof(pReq->szDevName));
488	AssertReturn(cchDevName < sizeof(pReq->szDevName), VERR_NO_STRING_TERMINATOR);
489	AssertReturn(cchDevName > 0, VERR_EMPTY_STRING);
490	AssertReturn(cchDevName < RT_SIZEOFMEMB(PDMDEVREG, szName), VERR_NOT_FOUND);
491
492	size_t const cchModName = RTStrNLen(pReq->szModName, sizeof(pReq->szModName));
493	AssertReturn(cchModName < sizeof(pReq->szModName), VERR_NO_STRING_TERMINATOR);
494	AssertReturn(cchModName > 0, VERR_EMPTY_STRING);
495	AssertReturn(pReq->cbInstanceShared <= PDM_MAX_DEVICE_INSTANCE_SIZE, VERR_OUT_OF_RANGE);
496	AssertReturn(pReq->cbInstanceR3 <= PDM_MAX_DEVICE_INSTANCE_SIZE, VERR_OUT_OF_RANGE);
497	AssertReturn(pReq->cbInstanceRC <= PDM_MAX_DEVICE_INSTANCE_SIZE, VERR_OUT_OF_RANGE);
498	AssertReturn(pReq->iInstance < 1024, VERR_OUT_OF_RANGE);
499	AssertReturn(pReq->iInstance < pReq->cMaxInstances, VERR_OUT_OF_RANGE);
500	AssertReturn(pReq->cMaxPciDevices <= 8, VERR_OUT_OF_RANGE);
501	AssertReturn(pReq->cMaxMsixVectors <= VBOX_MSIX_MAX_ENTRIES, VERR_OUT_OF_RANGE);
502
503	/*
504	* Reference the module.
505	*/
506	void *hMod = NULL;
507	rc = SUPR0LdrModByName(pGVM->pSession, pReq->szModName, &hMod);
508	if (RT_FAILURE(rc))
509	{
510	LogRel(("PDMR0DeviceCreateReqHandler: SUPR0LdrModByName(,%s,) failed: %Rrc\n", pReq->szModName, rc));
511	return rc;
512	}
513
514	/*
515	* Look for the the module and the device registration structure.
516	*/
517	int rcLock = SUPR0LdrLock(pGVM->pSession);
518	AssertRC(rc);
519
520	rc = VERR_NOT_FOUND;
521	PPDMDEVMODREGR0 pMod;
522	RTListForEach(&g_PDMDevModList, pMod, PDMDEVMODREGR0, ListEntry)
523	{
524	if (pMod->hMod == hMod)
525	{
526	/*
527	* Found the module. We can drop the loader lock now before we
528	* search the devices it registers.
529	*/
530	if (RT_SUCCESS(rcLock))
531	{
532	rcLock = SUPR0LdrUnlock(pGVM->pSession);
533	AssertRC(rcLock);
534	}
535	rcLock = VERR_ALREADY_RESET;
536
537	PCPDMDEVREGR0 *papDevRegs = pMod->papDevRegs;
538	size_t i = pMod->cDevRegs;
539	while (i-- > 0)
540	{
541	PCPDMDEVREGR0 pDevReg = papDevRegs[i];
542	LogFlow(("PDMR0DeviceCreateReqHandler: candidate #%u: %s %#x\n", i, pReq->szDevName, pDevReg->u32Version));
543	if ( PDM_VERSION_ARE_COMPATIBLE(pDevReg->u32Version, PDM_DEVREGR0_VERSION)
544	&& pDevReg->szName[cchDevName] == '\0'
545	&& memcmp(pDevReg->szName, pReq->szDevName, cchDevName) == 0)
546	{
547
548	/*
549	* Found the device, now check whether it matches the ring-3 registration.
550	*/
551	if ( pReq->uSharedVersion == pDevReg->uSharedVersion
552	&& pReq->cbInstanceShared == pDevReg->cbInstanceShared
553	&& pReq->cbInstanceRC == pDevReg->cbInstanceRC
554	&& pReq->fFlags == pDevReg->fFlags
555	&& pReq->fClass == pDevReg->fClass
556	&& pReq->cMaxInstances == pDevReg->cMaxInstances
557	&& pReq->cMaxPciDevices == pDevReg->cMaxPciDevices
558	&& pReq->cMaxMsixVectors == pDevReg->cMaxMsixVectors)
559	{
560	rc = pdmR0DeviceCreateWorker(pGVM, pDevReg, pReq->iInstance, pReq->cbInstanceR3, pReq->cbInstanceRC,
561	NIL_RTRCPTR /** @todo new raw-mode */, pReq->hDbgfTracerEvtSrc,
562	hMod, &pReq->pDevInsR3);
563	if (RT_SUCCESS(rc))
564	hMod = NULL; /* keep the module reference */
565	}
566	else
567	{
568	LogRel(("PDMR0DeviceCreate: Ring-3 does not match ring-0 device registration (%s):\n"
569	" uSharedVersion: %#x vs %#x\n"
570	" cbInstanceShared: %#x vs %#x\n"
571	" cbInstanceRC: %#x vs %#x\n"
572	" fFlags: %#x vs %#x\n"
573	" fClass: %#x vs %#x\n"
574	" cMaxInstances: %#x vs %#x\n"
575	" cMaxPciDevices: %#x vs %#x\n"
576	" cMaxMsixVectors: %#x vs %#x\n"
577	,
578	pReq->szDevName,
579	pReq->uSharedVersion, pDevReg->uSharedVersion,
580	pReq->cbInstanceShared, pDevReg->cbInstanceShared,
581	pReq->cbInstanceRC, pDevReg->cbInstanceRC,
582	pReq->fFlags, pDevReg->fFlags,
583	pReq->fClass, pDevReg->fClass,
584	pReq->cMaxInstances, pDevReg->cMaxInstances,
585	pReq->cMaxPciDevices, pDevReg->cMaxPciDevices,
586	pReq->cMaxMsixVectors, pDevReg->cMaxMsixVectors));
587	rc = VERR_INCOMPATIBLE_CONFIG;
588	}
589	}
590	}
591	break;
592	}
593	}
594
595	if (RT_SUCCESS_NP(rcLock))
596	{
597	rcLock = SUPR0LdrUnlock(pGVM->pSession);
598	AssertRC(rcLock);
599	}
600	SUPR0LdrModRelease(pGVM->pSession, hMod);
601	return rc;
602	}
603
604
605	/**
606	* Used by ring-3 PDM to call standard ring-0 device methods.
607	*
608	* @returns VBox status code.
609	* @param pGVM The global (ring-0) VM structure.
610	* @param pReq Pointer to the request buffer.
611	* @param idCpu The ID of the calling EMT.
612	* @thread EMT(0), except for PDMDEVICEGENCALL_REQUEST which can be any EMT.
613	*/
614	VMMR0_INT_DECL(int) PDMR0DeviceGenCallReqHandler(PGVM pGVM, PPDMDEVICEGENCALLREQ pReq, VMCPUID idCpu)
615	{
616	/*
617	* Validate the request.
618	*/
619	AssertReturn(pReq->Hdr.cbReq == sizeof(*pReq), VERR_INVALID_PARAMETER);
620
621	int rc = GVMMR0ValidateGVMandEMT(pGVM, idCpu);
622	AssertRCReturn(rc, rc);
623
624	AssertReturn(pReq->idxR0Device < pGVM->pdmr0.s.cDevInstances, VERR_INVALID_HANDLE);
625	PPDMDEVINSR0 pDevIns = pGVM->pdmr0.s.apDevInstances[pReq->idxR0Device];
626	AssertPtrReturn(pDevIns, VERR_INVALID_HANDLE);
627	AssertReturn(pDevIns->pDevInsForR3 == pReq->pDevInsR3, VERR_INVALID_HANDLE);
628
629	/*
630	* Make the call.
631	*/
632	rc = VINF_SUCCESS /VINF_NOT_IMPLEMENTED/;
633	switch (pReq->enmCall)
634	{
635	case PDMDEVICEGENCALL_CONSTRUCT:
636	AssertMsgBreakStmt(pGVM->enmVMState < VMSTATE_CREATED, ("enmVMState=%d\n", pGVM->enmVMState), rc = VERR_INVALID_STATE);
637	AssertReturn(idCpu == 0, VERR_VM_THREAD_NOT_EMT);
638	if (pDevIns->pReg->pfnConstruct)
639	rc = pDevIns->pReg->pfnConstruct(pDevIns);
640	break;
641
642	case PDMDEVICEGENCALL_DESTRUCT:
643	AssertMsgBreakStmt(pGVM->enmVMState < VMSTATE_CREATED \|\| pGVM->enmVMState >= VMSTATE_DESTROYING,
644	("enmVMState=%d\n", pGVM->enmVMState), rc = VERR_INVALID_STATE);
645	AssertReturn(idCpu == 0, VERR_VM_THREAD_NOT_EMT);
646	if (pDevIns->pReg->pfnDestruct)
647	{
648	pDevIns->pReg->pfnDestruct(pDevIns);
649	rc = VINF_SUCCESS;
650	}
651	break;
652
653	case PDMDEVICEGENCALL_REQUEST:
654	if (pDevIns->pReg->pfnRequest)
655	rc = pDevIns->pReg->pfnRequest(pDevIns, pReq->Params.Req.uReq, pReq->Params.Req.uArg);
656	else
657	rc = VERR_INVALID_FUNCTION;
658	break;
659
660	default:
661	AssertMsgFailed(("enmCall=%d\n", pReq->enmCall));
662	rc = VERR_INVALID_FUNCTION;
663	break;
664	}
665
666	return rc;
667	}
668
669
670	/**
671	* Legacy device mode compatiblity.
672	*
673	* @returns VBox status code.
674	* @param pGVM The global (ring-0) VM structure.
675	* @param pReq Pointer to the request buffer.
676	* @thread EMT(0)
677	*/
678	VMMR0_INT_DECL(int) PDMR0DeviceCompatSetCritSectReqHandler(PGVM pGVM, PPDMDEVICECOMPATSETCRITSECTREQ pReq)
679	{
680	/*
681	* Validate the request.
682	*/
683	AssertReturn(pReq->Hdr.cbReq == sizeof(*pReq), VERR_INVALID_PARAMETER);
684
685	int rc = GVMMR0ValidateGVMandEMT(pGVM, 0);
686	AssertRCReturn(rc, rc);
687
688	AssertReturn(pReq->idxR0Device < pGVM->pdmr0.s.cDevInstances, VERR_INVALID_HANDLE);
689	PPDMDEVINSR0 pDevIns = pGVM->pdmr0.s.apDevInstances[pReq->idxR0Device];
690	AssertPtrReturn(pDevIns, VERR_INVALID_HANDLE);
691	AssertReturn(pDevIns->pDevInsForR3 == pReq->pDevInsR3, VERR_INVALID_HANDLE);
692
693	AssertReturn(pGVM->enmVMState == VMSTATE_CREATING, VERR_INVALID_STATE);
694
695	/*
696	* The critical section address can be in a few different places:
697	* 1. shared data.
698	* 2. nop section.
699	* 3. pdm critsect.
700	*/
701	PPDMCRITSECT pCritSect;
702	if (pReq->pCritSectR3 == pGVM->pVMR3 + RT_UOFFSETOF(VM, pdm.s.NopCritSect))
703	{
704	pCritSect = &pGVM->pdm.s.NopCritSect;
705	Log(("PDMR0DeviceCompatSetCritSectReqHandler: Nop - %p %#x\n", pCritSect, pCritSect->s.Core.u32Magic));
706	}
707	else if (pReq->pCritSectR3 == pGVM->pVMR3 + RT_UOFFSETOF(VM, pdm.s.CritSect))
708	{
709	pCritSect = &pGVM->pdm.s.CritSect;
710	Log(("PDMR0DeviceCompatSetCritSectReqHandler: PDM - %p %#x\n", pCritSect, pCritSect->s.Core.u32Magic));
711	}
712	else
713	{
714	size_t offCritSect = pReq->pCritSectR3 - pDevIns->pDevInsForR3R0->pvInstanceDataR3;
715	AssertLogRelMsgReturn( offCritSect < pDevIns->pReg->cbInstanceShared
716	&& offCritSect + sizeof(PDMCRITSECT) <= pDevIns->pReg->cbInstanceShared,
717	("offCritSect=%p pCritSectR3=%p cbInstanceShared=%#x (%s)\n",
718	offCritSect, pReq->pCritSectR3, pDevIns->pReg->cbInstanceShared, pDevIns->pReg->szName),
719	VERR_INVALID_POINTER);
720	pCritSect = (PPDMCRITSECT)((uint8_t *)pDevIns->pvInstanceDataR0 + offCritSect);
721	Log(("PDMR0DeviceCompatSetCritSectReqHandler: custom - %#x/%p %#x\n", offCritSect, pCritSect, pCritSect->s.Core.u32Magic));
722	}
723	AssertLogRelMsgReturn(pCritSect->s.Core.u32Magic == RTCRITSECT_MAGIC,
724	("cs=%p magic=%#x dev=%s\n", pCritSect, pCritSect->s.Core.u32Magic, pDevIns->pReg->szName),
725	VERR_INVALID_MAGIC);
726
727	/*
728	* Make the update.
729	*/
730	pDevIns->pCritSectRoR0 = pCritSect;
731
732	return VINF_SUCCESS;
733	}
734
735
736	/**
737	* Registers the device implementations living in a module.
738	*
739	* This should normally only be called during ModuleInit(). The should be a
740	* call to PDMR0DeviceDeregisterModule from the ModuleTerm() function to undo
741	* the effects of this call.
742	*
743	* @returns VBox status code.
744	* @param hMod The module handle of the module being registered.
745	* @param pModReg The module registration structure. This will be
746	* used directly so it must live as long as the module
747	* and be writable.
748	*
749	* @note Caller must own the loader lock!
750	*/
751	VMMR0DECL(int) PDMR0DeviceRegisterModule(void *hMod, PPDMDEVMODREGR0 pModReg)
752	{
753	/*
754	* Validate the input.
755	*/
756	AssertPtrReturn(hMod, VERR_INVALID_HANDLE);
757	Assert(SUPR0LdrIsLockOwnerByMod(hMod, true));
758
759	AssertPtrReturn(pModReg, VERR_INVALID_POINTER);
760	AssertLogRelMsgReturn(PDM_VERSION_ARE_COMPATIBLE(pModReg->u32Version, PDM_DEVMODREGR0_VERSION),
761	("pModReg->u32Version=%#x vs %#x\n", pModReg->u32Version, PDM_DEVMODREGR0_VERSION),
762	VERR_VERSION_MISMATCH);
763	AssertLogRelMsgReturn(pModReg->cDevRegs <= 256 && pModReg->cDevRegs > 0, ("cDevRegs=%u\n", pModReg->cDevRegs),
764	VERR_OUT_OF_RANGE);
765	AssertLogRelMsgReturn(pModReg->hMod == NULL, ("hMod=%p\n", pModReg->hMod), VERR_INVALID_PARAMETER);
766	AssertLogRelMsgReturn(pModReg->ListEntry.pNext == NULL, ("pNext=%p\n", pModReg->ListEntry.pNext), VERR_INVALID_PARAMETER);
767	AssertLogRelMsgReturn(pModReg->ListEntry.pPrev == NULL, ("pPrev=%p\n", pModReg->ListEntry.pPrev), VERR_INVALID_PARAMETER);
768
769	for (size_t i = 0; i < pModReg->cDevRegs; i++)
770	{
771	PCPDMDEVREGR0 pDevReg = pModReg->papDevRegs[i];
772	AssertLogRelMsgReturn(RT_VALID_PTR(pDevReg), ("[%u]: %p\n", i, pDevReg), VERR_INVALID_POINTER);
773	AssertLogRelMsgReturn(PDM_VERSION_ARE_COMPATIBLE(pDevReg->u32Version, PDM_DEVREGR0_VERSION),
774	("pDevReg->u32Version=%#x vs %#x\n", pModReg->u32Version, PDM_DEVREGR0_VERSION), VERR_VERSION_MISMATCH);
775	AssertLogRelMsgReturn(RT_VALID_PTR(pDevReg->pszDescription), ("[%u]: %p\n", i, pDevReg->pszDescription), VERR_INVALID_POINTER);
776	AssertLogRelMsgReturn(pDevReg->uReserved0 == 0, ("[%u]: %#x\n", i, pDevReg->uReserved0), VERR_INVALID_PARAMETER);
777	AssertLogRelMsgReturn(pDevReg->fClass != 0, ("[%u]: %#x\n", i, pDevReg->fClass), VERR_INVALID_PARAMETER);
778	AssertLogRelMsgReturn(pDevReg->fFlags != 0, ("[%u]: %#x\n", i, pDevReg->fFlags), VERR_INVALID_PARAMETER);
779	AssertLogRelMsgReturn(pDevReg->cMaxInstances > 0, ("[%u]: %#x\n", i, pDevReg->cMaxInstances), VERR_INVALID_PARAMETER);
780	AssertLogRelMsgReturn(pDevReg->cMaxPciDevices <= 8, ("[%u]: %#x\n", i, pDevReg->cMaxPciDevices), VERR_INVALID_PARAMETER);
781	AssertLogRelMsgReturn(pDevReg->cMaxMsixVectors <= VBOX_MSIX_MAX_ENTRIES,
782	("[%u]: %#x\n", i, pDevReg->cMaxMsixVectors), VERR_INVALID_PARAMETER);
783
784	/* The name must be printable ascii and correctly terminated. */
785	for (size_t off = 0; off < RT_ELEMENTS(pDevReg->szName); off++)
786	{
787	char ch = pDevReg->szName[off];
788	AssertLogRelMsgReturn(RT_C_IS_PRINT(ch) \|\| (ch == '\0' && off > 0),
789	("[%u]: off=%u szName: %.*Rhxs\n", i, off, sizeof(pDevReg->szName), &pDevReg->szName[0]),
790	VERR_INVALID_NAME);
791	if (ch == '\0')
792	break;
793	}
794	}
795
796	/*
797	* Add it, assuming we're being called at ModuleInit/ModuleTerm time only, or
798	* that the caller has already taken the loader lock.
799	*/
800	pModReg->hMod = hMod;
801	RTListAppend(&g_PDMDevModList, &pModReg->ListEntry);
802
803	return VINF_SUCCESS;
804	}
805
806
807	/**
808	* Deregisters the device implementations living in a module.
809	*
810	* This should normally only be called during ModuleTerm().
811	*
812	* @returns VBox status code.
813	* @param hMod The module handle of the module being registered.
814	* @param pModReg The module registration structure. This will be
815	* used directly so it must live as long as the module
816	* and be writable.
817	*
818	* @note Caller must own the loader lock!
819	*/
820	VMMR0DECL(int) PDMR0DeviceDeregisterModule(void *hMod, PPDMDEVMODREGR0 pModReg)
821	{
822	/*
823	* Validate the input.
824	*/
825	AssertPtrReturn(hMod, VERR_INVALID_HANDLE);
826	Assert(SUPR0LdrIsLockOwnerByMod(hMod, true));
827
828	AssertPtrReturn(pModReg, VERR_INVALID_POINTER);
829	AssertLogRelMsgReturn(PDM_VERSION_ARE_COMPATIBLE(pModReg->u32Version, PDM_DEVMODREGR0_VERSION),
830	("pModReg->u32Version=%#x vs %#x\n", pModReg->u32Version, PDM_DEVMODREGR0_VERSION),
831	VERR_VERSION_MISMATCH);
832	AssertLogRelMsgReturn(pModReg->hMod == hMod \|\| pModReg->hMod == NULL, ("pModReg->hMod=%p vs %p\n", pModReg->hMod, hMod),
833	VERR_INVALID_PARAMETER);
834
835	/*
836	* Unlink the registration record and return it to virgin conditions. Ignore
837	* the call if not registered.
838	*/
839	if (pModReg->hMod)
840	{
841	pModReg->hMod = NULL;
842	RTListNodeRemove(&pModReg->ListEntry);
843	pModReg->ListEntry.pNext = NULL;
844	pModReg->ListEntry.pPrev = NULL;
845	return VINF_SUCCESS;
846	}
847	return VWRN_NOT_FOUND;
848	}
849

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source: vbox/trunk/src/VBox/VMM/VMMR0/PDMR0Device.cpp@ 87758

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