SUPDrvInternal.h@ 56284

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1	/* $Id: SUPDrvInternal.h 55436 2015-04-27 09:13:02Z vboxsync $ */
2	/** @file
3	* VirtualBox Support Driver - Internal header.
4	*/
5
6	/*
7	* Copyright (C) 2006-2014 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	* The contents of this file may alternatively be used under the terms
18	* of the Common Development and Distribution License Version 1.0
19	* (CDDL) only, as it comes in the "COPYING.CDDL" file of the
20	* VirtualBox OSE distribution, in which case the provisions of the
21	* CDDL are applicable instead of those of the GPL.
22	*
23	* You may elect to license modified versions of this file under the
24	* terms and conditions of either the GPL or the CDDL or both.
25	*/
26
27	#ifndef ___SUPDrvInternal_h
28	#define ___SUPDrvInternal_h
29
30
31	/*******************************************************************************
32	* Header Files *
33	*******************************************************************************/
34	#include <VBox/cdefs.h>
35	#include <VBox/types.h>
36	#include <VBox/sup.h>
37
38	#include <iprt/assert.h>
39	#include <iprt/list.h>
40	#include <iprt/memobj.h>
41	#include <iprt/time.h>
42	#include <iprt/timer.h>
43	#include <iprt/string.h>
44	#include <iprt/err.h>
45
46	#ifdef SUPDRV_AGNOSTIC
47	/* do nothing */
48
49	#elif defined(RT_OS_WINDOWS)
50	RT_C_DECLS_BEGIN
51	# if (_MSC_VER >= 1400) && !defined(VBOX_WITH_PATCHED_DDK)
52	# define _InterlockedExchange _InterlockedExchange_StupidDDKVsCompilerCrap
53	# define _InterlockedExchangeAdd _InterlockedExchangeAdd_StupidDDKVsCompilerCrap
54	# define _InterlockedCompareExchange _InterlockedCompareExchange_StupidDDKVsCompilerCrap
55	# define _InterlockedAddLargeStatistic _InterlockedAddLargeStatistic_StupidDDKVsCompilerCrap
56	# define _interlockedbittestandset _interlockedbittestandset_StupidDDKVsCompilerCrap
57	# define _interlockedbittestandreset _interlockedbittestandreset_StupidDDKVsCompilerCrap
58	# define _interlockedbittestandset64 _interlockedbittestandset64_StupidDDKVsCompilerCrap
59	# define _interlockedbittestandreset64 _interlockedbittestandreset64_StupidDDKVsCompilerCrap
60	# pragma warning(disable : 4163)
61	# include <iprt/nt/nt.h>
62	# pragma warning(default : 4163)
63	# undef _InterlockedExchange
64	# undef _InterlockedExchangeAdd
65	# undef _InterlockedCompareExchange
66	# undef _InterlockedAddLargeStatistic
67	# undef _interlockedbittestandset
68	# undef _interlockedbittestandreset
69	# undef _interlockedbittestandset64
70	# undef _interlockedbittestandreset64
71	# else
72	# include <iprt/nt/nt.h>
73	# endif
74	# include <memory.h>
75	RT_C_DECLS_END
76
77	#elif defined(RT_OS_LINUX)
78	# include <linux/version.h>
79	# if LINUX_VERSION_CODE >= KERNEL_VERSION(2, 6, 33)
80	# include <generated/autoconf.h>
81	# else
82	# ifndef AUTOCONF_INCLUDED
83	# include <linux/autoconf.h>
84	# endif
85	# endif
86	# if defined(CONFIG_MODVERSIONS) && !defined(MODVERSIONS)
87	# define MODVERSIONS
88	# if LINUX_VERSION_CODE < KERNEL_VERSION(2, 5, 71)
89	# include <linux/modversions.h>
90	# endif
91	# endif
92	# if LINUX_VERSION_CODE > KERNEL_VERSION(2, 6, 0)
93	# undef ALIGN
94	# endif
95	# ifndef KBUILD_STR
96	# if LINUX_VERSION_CODE < KERNEL_VERSION(2, 6, 16)
97	# define KBUILD_STR(s) s
98	# else
99	# define KBUILD_STR(s) #s
100	# endif
101	# endif
102	# include <linux/string.h>
103	# include <linux/spinlock.h>
104	# include <linux/slab.h>
105	# if LINUX_VERSION_CODE >= KERNEL_VERSION(2, 6, 27)
106	# include <linux/semaphore.h>
107	# else /* older kernels */
108	# include <asm/semaphore.h>
109	# endif /* older kernels */
110	# include <linux/timer.h>
111
112	#elif defined(RT_OS_DARWIN)
113	# include <libkern/libkern.h>
114	# include <iprt/string.h>
115
116	#elif defined(RT_OS_OS2)
117
118	#elif defined(RT_OS_FREEBSD)
119	# define memset libkern_memset /** @todo these are just hacks to get it compiling, check out later. */
120	# define memcmp libkern_memcmp
121	# define strchr libkern_strchr
122	# define strrchr libkern_strrchr
123	# define ffsl libkern_ffsl
124	# define fls libkern_fls
125	# define flsl libkern_flsl
126	# include <sys/libkern.h>
127	# undef memset
128	# undef memcmp
129	# undef strchr
130	# undef strrchr
131	# undef ffs
132	# undef ffsl
133	# undef fls
134	# undef flsl
135	# include <iprt/string.h>
136
137	#elif defined(RT_OS_SOLARIS)
138	# include <sys/cmn_err.h>
139	# include <iprt/string.h>
140
141	#else
142	# error "unsupported OS."
143	#endif
144
145	#include "SUPDrvIOC.h"
146	#include "SUPDrvIDC.h"
147
148
149
150	/*******************************************************************************
151	* Defined Constants And Macros *
152	*******************************************************************************/
153	/*
154	* Hardcoded cookies.
155	*/
156	#define BIRD 0x64726962 /* 'bird' */
157	#define BIRD_INV 0x62697264 /* 'drib' */
158
159
160	#ifdef RT_OS_WINDOWS
161	/** Use a normal mutex for the loader so we remain at the same IRQL after
162	* taking it.
163	* @todo fix the mutex implementation on linux and make this the default. */
164	# define SUPDRV_USE_MUTEX_FOR_LDR
165
166	/** Use a normal mutex for the GIP so we remain at the same IRQL after
167	* taking it.
168	* @todo fix the mutex implementation on linux and make this the default. */
169	# define SUPDRV_USE_MUTEX_FOR_GIP
170	#endif
171
172
173	/**
174	* OS debug print macro.
175	*/
176	#define OSDBGPRINT(a) SUPR0Printf a
177
178	/** Debug printf macro shared with the ring-3 part. */
179	#ifdef DEBUG_bird
180	# define SUP_DPRINTF(a) SUPR0Printf a
181	#else
182	# define SUP_DPRINTF(a) do { } while (0)
183	#endif
184
185
186	/** @name Context values for the per-session handle tables.
187	* The context value is used to distinguish between the different kinds of
188	* handles, making the handle table API do all the work.
189	* @{ */
190	/** Handle context value for single release event handles. */
191	#define SUPDRV_HANDLE_CTX_EVENT ((void *)(uintptr_t)(SUPDRVOBJTYPE_SEM_EVENT))
192	/** Handle context value for multiple release event handles. */
193	#define SUPDRV_HANDLE_CTX_EVENT_MULTI ((void *)(uintptr_t)(SUPDRVOBJTYPE_SEM_EVENT_MULTI))
194	/** @} */
195
196
197	/**
198	* Validates a session pointer.
199	*
200	* @returns true/false accordingly.
201	* @param pSession The session.
202	*/
203	#define SUP_IS_SESSION_VALID(pSession) \
204	( VALID_PTR(pSession) \
205	&& pSession->u32Cookie == BIRD_INV)
206
207	/**
208	* Validates a device extension pointer.
209	*
210	* @returns true/false accordingly.
211	* @param pDevExt The device extension.
212	*/
213	#define SUP_IS_DEVEXT_VALID(pDevExt) \
214	( VALID_PTR(pDevExt)\
215	&& pDevExt->u32Cookie == BIRD)
216
217
218	/** @def SUPDRV_WITH_MSR_PROBER
219	* Enables the SUP_IOCTL_MSR_PROBER function.
220	* By default, only enabled in DEBUG builds as it's a sensitive feature.
221	*/
222	#if defined(DEBUG) && !defined(SUPDRV_WITH_MSR_PROBER) && !defined(SUPDRV_WITHOUT_MSR_PROBER)
223	# define SUPDRV_WITH_MSR_PROBER
224	#endif
225
226	/** @def SUPDRV_WITHOUT_MSR_PROBER
227	* Executive overide for disabling the SUP_IOCTL_MSR_PROBER function.
228	*/
229	#ifdef SUPDRV_WITHOUT_MSR_PROBER
230	# undef SUPDRV_WITH_MSR_PROBER
231	#endif
232
233	#if 1
234	/** Use a dedicated kernel thread to service TSC-delta measurement requests.
235	* @todo Test on servers with many CPUs and sockets. */
236	#define SUPDRV_USE_TSC_DELTA_THREAD
237	#endif
238
239	/*******************************************************************************
240	* Structures and Typedefs *
241	*******************************************************************************/
242	/** Pointer to the device extension. */
243	typedef struct SUPDRVDEVEXT *PSUPDRVDEVEXT;
244
245	#ifdef SUPDRV_USE_TSC_DELTA_THREAD
246	/**
247	* TSC-delta measurement thread state machine.
248	*/
249	typedef enum SUPDRVTSCDELTATHREADSTATE
250	{
251	/** Uninitialized/invalid value. */
252	kTscDeltaThreadState_Invalid = 0,
253	/** The thread is being created.
254	* Next state: Listening, Butchered, Terminating */
255	kTscDeltaThreadState_Creating,
256	/** The thread is listening for events.
257	* Previous state: Creating, Measuring
258	* Next state: WaitAndMeasure, Butchered, Terminated */
259	kTscDeltaThreadState_Listening,
260	/** The thread is sleeping before starting a measurement.
261	* Previous state: Listening, Measuring
262	* Next state: Measuring, Butchered, Terminating
263	* @remarks The thread won't enter this state on its own, it is put into this
264	* state by the GIP timer, the CPU online callback and by the
265	* SUP_IOCTL_TSC_DELTA_MEASURE code. */
266	kTscDeltaThreadState_WaitAndMeasure,
267	/** The thread is currently servicing a measurement request.
268	* Previous state: WaitAndMeasure
269	* Next state: Listening, WaitAndMeasure, Terminate */
270	kTscDeltaThreadState_Measuring,
271	/** The thread is terminating.
272	* @remarks The thread won't enter this state on its own, is put into this state
273	* by supdrvTscDeltaTerm. */
274	kTscDeltaThreadState_Terminating,
275	/** The thread is butchered due to an unexpected error.
276	* Previous State: Creating, Listening, WaitAndMeasure */
277	kTscDeltaThreadState_Butchered,
278	/** The thread is destroyed (final).
279	* Previous state: Terminating */
280	kTscDeltaThreadState_Destroyed,
281	/** The usual 32-bit blowup hack. */
282	kTscDeltaThreadState_32BitHack = 0x7fffffff
283	} SUPDRVTSCDELTATHREADSTATE;
284	#endif /* SUPDRV_USE_TSC_DELTA_THREAD */
285
286	/**
287	* Memory reference types.
288	*/
289	typedef enum
290	{
291	/** Unused entry */
292	MEMREF_TYPE_UNUSED = 0,
293	/** Locked memory (r3 mapping only). */
294	MEMREF_TYPE_LOCKED,
295	/** Continuous memory block (r3 and r0 mapping). */
296	MEMREF_TYPE_CONT,
297	/** Low memory block (r3 and r0 mapping). */
298	MEMREF_TYPE_LOW,
299	/** Memory block (r3 and r0 mapping). */
300	MEMREF_TYPE_MEM,
301	/** Locked memory (r3 mapping only) allocated by the support driver. */
302	MEMREF_TYPE_PAGE,
303	/** Blow the type up to 32-bit and mark the end. */
304	MEMREF_TYPE_32BIT_HACK = 0x7fffffff
305	} SUPDRVMEMREFTYPE, *PSUPDRVMEMREFTYPE;
306
307
308	/**
309	* Structure used for tracking memory a session
310	* references in one way or another.
311	*/
312	typedef struct SUPDRVMEMREF
313	{
314	/** The memory object handle. */
315	RTR0MEMOBJ MemObj;
316	/** The ring-3 mapping memory object handle. */
317	RTR0MEMOBJ MapObjR3;
318	/** Type of memory. */
319	SUPDRVMEMREFTYPE eType;
320	} SUPDRVMEMREF, *PSUPDRVMEMREF;
321
322
323	/**
324	* Bundle of locked memory ranges.
325	*/
326	typedef struct SUPDRVBUNDLE
327	{
328	/** Pointer to the next bundle. */
329	struct SUPDRVBUNDLE * volatile pNext;
330	/** Referenced memory. */
331	SUPDRVMEMREF aMem[64];
332	/** Number of entries used. */
333	uint32_t volatile cUsed;
334	} SUPDRVBUNDLE, *PSUPDRVBUNDLE;
335
336
337	/**
338	* Loaded image.
339	*/
340	typedef struct SUPDRVLDRIMAGE
341	{
342	/** Next in chain. */
343	struct SUPDRVLDRIMAGE * volatile pNext;
344	/** Pointer to the image. */
345	void *pvImage;
346	/** Pointer to the allocated image buffer.
347	* pvImage is 32-byte aligned or it may governed by the native loader (this
348	* member is NULL then). */
349	void *pvImageAlloc;
350	/** Size of the image including the tables. This is mainly for verification
351	* of the load request. */
352	uint32_t cbImageWithTabs;
353	/** Size of the image. */
354	uint32_t cbImageBits;
355	/** The number of entries in the symbol table. */
356	uint32_t cSymbols;
357	/** Pointer to the symbol table. */
358	PSUPLDRSYM paSymbols;
359	/** The offset of the string table. */
360	char *pachStrTab;
361	/** Size of the string table. */
362	uint32_t cbStrTab;
363	/** Pointer to the optional module initialization callback. */
364	PFNR0MODULEINIT pfnModuleInit;
365	/** Pointer to the optional module termination callback. */
366	PFNR0MODULETERM pfnModuleTerm;
367	/** Service request handler. This is NULL for non-service modules. */
368	PFNSUPR0SERVICEREQHANDLER pfnServiceReqHandler;
369	/** The ldr image state. (IOCtl code of last operation.) */
370	uint32_t uState;
371	/** Usage count. */
372	uint32_t volatile cUsage;
373	/** Pointer to the device extension. */
374	struct SUPDRVDEVEXT *pDevExt;
375	#ifdef RT_OS_WINDOWS
376	/** The section object for the loaded image (fNative=true). */
377	void *pvNtSectionObj;
378	/** Lock object. */
379	RTR0MEMOBJ hMemLock;
380	#endif
381	#if defined(RT_OS_SOLARIS) && defined(VBOX_WITH_NATIVE_SOLARIS_LOADING)
382	/** The Solaris module ID. */
383	int idSolMod;
384	/** Pointer to the module control structure. */
385	struct modctl *pSolModCtl;
386	#endif
387	/** Whether it's loaded by the native loader or not. */
388	bool fNative;
389	/** Image name. */
390	char szName[32];
391	} SUPDRVLDRIMAGE, *PSUPDRVLDRIMAGE;
392
393
394	/** Image usage record. */
395	typedef struct SUPDRVLDRUSAGE
396	{
397	/** Next in chain. */
398	struct SUPDRVLDRUSAGE * volatile pNext;
399	/** The image. */
400	PSUPDRVLDRIMAGE pImage;
401	/** Load count. */
402	uint32_t volatile cUsage;
403	} SUPDRVLDRUSAGE, *PSUPDRVLDRUSAGE;
404
405
406	/**
407	* Component factory registration record.
408	*/
409	typedef struct SUPDRVFACTORYREG
410	{
411	/** Pointer to the next registration. */
412	struct SUPDRVFACTORYREG *pNext;
413	/** Pointer to the registered factory. */
414	PCSUPDRVFACTORY pFactory;
415	/** The session owning the factory.
416	* Used for deregistration and session cleanup. */
417	PSUPDRVSESSION pSession;
418	/** Length of the name. */
419	size_t cchName;
420	} SUPDRVFACTORYREG;
421	/** Pointer to a component factory registration record. */
422	typedef SUPDRVFACTORYREG *PSUPDRVFACTORYREG;
423	/** Pointer to a const component factory registration record. */
424	typedef SUPDRVFACTORYREG const *PCSUPDRVFACTORYREG;
425
426
427	/**
428	* Registered object.
429	* This takes care of reference counting and tracking data for access checks.
430	*/
431	typedef struct SUPDRVOBJ
432	{
433	/** Magic value (SUPDRVOBJ_MAGIC). */
434	uint32_t u32Magic;
435	/** The object type. */
436	SUPDRVOBJTYPE enmType;
437	/** Pointer to the next in the global list. */
438	struct SUPDRVOBJ * volatile pNext;
439	/** Pointer to the object destructor.
440	* This may be set to NULL if the image containing the destructor get unloaded. */
441	PFNSUPDRVDESTRUCTOR pfnDestructor;
442	/** User argument 1. */
443	void *pvUser1;
444	/** User argument 2. */
445	void *pvUser2;
446	/** The total sum of all per-session usage. */
447	uint32_t volatile cUsage;
448	/** The creator user id. */
449	RTUID CreatorUid;
450	/** The creator group id. */
451	RTGID CreatorGid;
452	/** The creator process id. */
453	RTPROCESS CreatorProcess;
454	} SUPDRVOBJ, *PSUPDRVOBJ;
455
456	/** Magic number for SUPDRVOBJ::u32Magic. (Dame Agatha Mary Clarissa Christie). */
457	#define SUPDRVOBJ_MAGIC UINT32_C(0x18900915)
458	/** Dead number magic for SUPDRVOBJ::u32Magic. */
459	#define SUPDRVOBJ_MAGIC_DEAD UINT32_C(0x19760112)
460
461	/**
462	* The per-session object usage record.
463	*/
464	typedef struct SUPDRVUSAGE
465	{
466	/** Pointer to the next in the list. */
467	struct SUPDRVUSAGE * volatile pNext;
468	/** Pointer to the object we're recording usage for. */
469	PSUPDRVOBJ pObj;
470	/** The usage count. */
471	uint32_t volatile cUsage;
472	} SUPDRVUSAGE, *PSUPDRVUSAGE;
473
474
475	/**
476	* Per session data.
477	* This is mainly for memory tracking.
478	*/
479	typedef struct SUPDRVSESSION
480	{
481	/** Pointer to the device extension. */
482	PSUPDRVDEVEXT pDevExt;
483	/** Session Cookie. */
484	uint32_t u32Cookie;
485	/** Set if is an unrestricted session, clear if restricted. */
486	bool fUnrestricted;
487
488	/** Set if we're in the hash table, clear if not. Protected by the hash
489	* table spinlock. */
490	bool fInHashTable;
491	/** Reference counter. */
492	uint32_t volatile cRefs;
493	/** Pointer to the next session with the same hash (common hash table).
494	* Protected by the hash table spinlock. */
495	PSUPDRVSESSION pCommonNextHash;
496	/** Pointer to the OS specific session pointer, if available and in use.
497	* This is atomically set and cleared as the session is inserted and removed
498	* from the hash table (protected by the session hash table spinlock). */
499	PSUPDRVSESSION *ppOsSessionPtr;
500	/** The process (id) of the session. */
501	RTPROCESS Process;
502	/** Which process this session is associated with.
503	* This is NIL_RTR0PROCESS for kernel sessions and valid for user ones. */
504	RTR0PROCESS R0Process;
505
506	/** The VM associated with the session. */
507	PVM pVM;
508	/** Handle table for IPRT semaphore wrapper APIs.
509	* This takes care of its own locking in an IRQ safe manner. */
510	RTHANDLETABLE hHandleTable;
511	/** Load usage records. (protected by SUPDRVDEVEXT::mtxLdr) */
512	PSUPDRVLDRUSAGE volatile pLdrUsage;
513
514	/** Spinlock protecting the bundles, the GIP members and the
515	* fProcessCleanupDone flag. It continues to be valid until the last
516	* reference to the session is released. */
517	RTSPINLOCK Spinlock;
518	/** The ring-3 mapping of the GIP (readonly). */
519	RTR0MEMOBJ GipMapObjR3;
520	/** Set if the session is using the GIP. */
521	uint32_t fGipReferenced;
522	/** Bundle of locked memory objects. */
523	SUPDRVBUNDLE Bundle;
524	/** List of generic usage records. (protected by SUPDRVDEVEXT::SpinLock) */
525	PSUPDRVUSAGE volatile pUsage;
526
527	/** The user id of the session. (Set by the OS part.) */
528	RTUID Uid;
529	/** The group id of the session. (Set by the OS part.) */
530	RTGID Gid;
531	/** Per session tracer specfic data. */
532	uintptr_t uTracerData;
533	/** The thread currently actively talking to the tracer. (One at the time!) */
534	RTNATIVETHREAD hTracerCaller;
535	/** List of tracepoint providers associated with the session
536	* (SUPDRVTPPROVIDER). */
537	RTLISTANCHOR TpProviders;
538	/** The number of providers in TpProviders. */
539	uint32_t cTpProviders;
540	/** The number of threads active in supdrvIOCtl_TracerUmodProbeFire or
541	* SUPR0TracerUmodProbeFire. */
542	uint32_t volatile cTpProbesFiring;
543	/** User tracepoint modules (PSUPDRVTRACKERUMOD). */
544	RTLISTANCHOR TpUmods;
545	/** The user tracepoint module lookup table. */
546	struct SUPDRVTRACERUMOD *apTpLookupTable[32];
547	#ifndef SUPDRV_AGNOSTIC
548	# if defined(RT_OS_DARWIN)
549	/** Pointer to the associated org_virtualbox_SupDrvClient object. */
550	void *pvSupDrvClient;
551	/** Whether this session has been opened or not. */
552	bool fOpened;
553	# endif
554	# if defined(RT_OS_OS2)
555	/** The system file number of this session. */
556	uint16_t sfn;
557	uint16_t Alignment; /*< Alignment /
558	# endif
559	# if defined(RT_OS_DARWIN) \|\| defined(RT_OS_OS2) \|\| defined(RT_OS_SOLARIS)
560	/** Pointer to the next session with the same hash. */
561	PSUPDRVSESSION pNextHash;
562	# endif
563	# if defined(RT_OS_WINDOWS) && defined(VBOX_WITH_HARDENING)
564	/** Pointer to the process protection structure for this session. */
565	struct SUPDRVNTPROTECT *pNtProtect;
566	# endif
567	#endif /* !SUPDRV_AGNOSTIC */
568	} SUPDRVSESSION;
569
570
571	/**
572	* Device extension.
573	*/
574	typedef struct SUPDRVDEVEXT
575	{
576	/** Global cookie. */
577	uint32_t u32Cookie;
578	/** The actual size of SUPDRVSESSION. (SUPDRV_AGNOSTIC) */
579	uint32_t cbSession;
580
581	/** Spinlock to serialize the initialization, usage counting and objects.
582	* This is IRQ safe because we want to be able signal semaphores from the
583	* special HM context (and later maybe interrupt handlers), so we must be able
584	* to reference and dereference handles when IRQs are disabled. */
585	RTSPINLOCK Spinlock;
586
587	/** List of registered objects. Protected by the spinlock. */
588	PSUPDRVOBJ volatile pObjs;
589	/** List of free object usage records. */
590	PSUPDRVUSAGE volatile pUsageFree;
591
592	/** Loader mutex.
593	* This protects pvVMMR0, pvVMMR0Entry, pImages and SUPDRVSESSION::pLdrUsage. */
594	#ifdef SUPDRV_USE_MUTEX_FOR_LDR
595	RTSEMMUTEX mtxLdr;
596	#else
597	RTSEMFASTMUTEX mtxLdr;
598	#endif
599
600	/** VMM Module 'handle'.
601	* 0 if the code VMM isn't loaded and Idt are nops. */
602	void * volatile pvVMMR0;
603	/** VMMR0EntryInt() pointer. */
604	DECLR0CALLBACKMEMBER(int, pfnVMMR0EntryInt, (PVM pVM, unsigned uOperation, void *pvArg));
605	/** VMMR0EntryFast() pointer. */
606	DECLR0CALLBACKMEMBER(void, pfnVMMR0EntryFast, (PVM pVM, VMCPUID idCpu, unsigned uOperation));
607	/** VMMR0EntryEx() pointer. */
608	DECLR0CALLBACKMEMBER(int, pfnVMMR0EntryEx, (PVM pVM, VMCPUID idCpu, unsigned uOperation, PSUPVMMR0REQHDR pReq, uint64_t u64Arg, PSUPDRVSESSION pSession));
609
610	/** Linked list of loaded code. */
611	PSUPDRVLDRIMAGE volatile pLdrImages;
612	/** Set if the image loading interface got disabled after loading all needed images */
613	bool fLdrLockedDown;
614
615	/** @name These members for detecting whether an API caller is in ModuleInit.
616	* Certain APIs are only permitted from ModuleInit, like for instance tracepoint
617	* registration.
618	* @{ */
619	/** The image currently executing its ModuleInit. */
620	PSUPDRVLDRIMAGE volatile pLdrInitImage;
621	/** The thread currently executing a ModuleInit function. */
622	RTNATIVETHREAD volatile hLdrInitThread;
623	/** @} */
624
625
626	/** GIP mutex.
627	* Any changes to any of the GIP members requires ownership of this mutex,
628	* except on driver init and termination. */
629	#ifdef SUPDRV_USE_MUTEX_FOR_GIP
630	RTSEMMUTEX mtxGip;
631	#else
632	RTSEMFASTMUTEX mtxGip;
633	#endif
634	/** GIP spinlock protecting GIP members during Mp events.
635	* This is IRQ safe since be may get MP callbacks in contexts where IRQs are
636	* disabled (on some platforms). */
637	RTSPINLOCK hGipSpinlock;
638	/** Pointer to the Global Info Page (GIP). */
639	PSUPGLOBALINFOPAGE pGip;
640	/** The physical address of the GIP. */
641	RTHCPHYS HCPhysGip;
642	/** Number of processes using the GIP.
643	* (The updates are suspend while cGipUsers is 0.)*/
644	uint32_t volatile cGipUsers;
645	/** The ring-0 memory object handle for the GIP page. */
646	RTR0MEMOBJ GipMemObj;
647	/** The GIP timer handle. */
648	PRTTIMER pGipTimer;
649	/** If non-zero we've successfully called RTTimerRequestSystemGranularity(). */
650	uint32_t u32SystemTimerGranularityGrant;
651	/** The CPU id of the GIP master.
652	* This CPU is responsible for the updating the common GIP data and it is
653	* the one used to calculate TSC deltas relative to.
654	* (The initial master will have a 0 zero value, but it it goes offline the
655	* new master may have a non-zero value.) */
656	RTCPUID volatile idGipMaster;
657
658	/** Component factory mutex.
659	* This protects pComponentFactoryHead and component factory querying. */
660	RTSEMFASTMUTEX mtxComponentFactory;
661	/** The head of the list of registered component factories. */
662	PSUPDRVFACTORYREG pComponentFactoryHead;
663
664	/** Lock protecting The tracer members. */
665	RTSEMFASTMUTEX mtxTracer;
666	/** List of tracer providers (SUPDRVTPPROVIDER). */
667	RTLISTANCHOR TracerProviderList;
668	/** List of zombie tracer providers (SUPDRVTPPROVIDER). */
669	RTLISTANCHOR TracerProviderZombieList;
670	/** Pointer to the tracer registration record. */
671	PCSUPDRVTRACERREG pTracerOps;
672	/** The ring-0 session of a native tracer provider. */
673	PSUPDRVSESSION pTracerSession;
674	/** The image containing the tracer. */
675	PSUPDRVLDRIMAGE pTracerImage;
676	/** The tracer helpers. */
677	SUPDRVTRACERHLP TracerHlp;
678	/** The number of session having opened the tracer currently. */
679	uint32_t cTracerOpens;
680	/** The number of threads currently calling into the tracer. */
681	uint32_t volatile cTracerCallers;
682	/** Set if the tracer is being unloaded. */
683	bool fTracerUnloading;
684	/** Hash table for user tracer modules (SUPDRVVTGCOPY). */
685	RTLISTANCHOR aTrackerUmodHash[128];
686
687	/** @name Session Handle Table.
688	* @{ */
689	/** Spinlock protecting apSessionHashTab, cSessions,
690	* SUPDRVSESSION::ppOsSessionPtr, SUPDRVSESSION::pCommonNextHash, and possibly
691	* others depending on the OS. */
692	RTSPINLOCK hSessionHashTabSpinlock;
693	/** Session hash table hash table. The size of this table must make sense in
694	* comparison to GVMM_MAX_HANDLES. */
695	PSUPDRVSESSION apSessionHashTab[HC_ARCH_BITS == 64 ? 8191 : 127];
696	/** The number of open sessions. */
697	int32_t cSessions;
698	/** @} */
699
700	/** @name Invariant TSC frequency refinement.
701	* @{ */
702	/** Nanosecond timestamp at the start of the TSC frequency refinement phase. */
703	uint64_t nsStartInvarTscRefine;
704	/** TSC reading at the start of the TSC frequency refinement phase. */
705	uint64_t uTscStartInvarTscRefine;
706	/** The CPU id of the CPU that u64TscAnchor was measured on. */
707	RTCPUID idCpuInvarTscRefine;
708	/** Pointer to the timer used to refine the TSC frequency. */
709	PRTTIMER pInvarTscRefineTimer;
710	/** Stop the timer on the next tick because we saw a power event. */
711	bool volatile fInvTscRefinePowerEvent;
712	/** @} */
713
714	/** @name TSC-delta measurement.
715	* @{ */
716	/** Number of online/offline events, incremented each time a CPU goes online
717	* or offline. */
718	uint32_t volatile cMpOnOffEvents;
719	/** TSC-delta measurement mutext.
720	* At the moment, we don't want to have more than one measurement going on at
721	* any one time. We might be using broadcast IPIs which are heavy and could
722	* perhaps get in each others way. */
723	#ifdef SUPDRV_USE_MUTEX_FOR_GIP
724	RTSEMMUTEX mtxTscDelta;
725	#else
726	RTSEMFASTMUTEX mtxTscDelta;
727	#endif
728	/** The set of CPUs we need to take measurements for. */
729	RTCPUSET TscDeltaCpuSet;
730	/** The set of CPUs we have completed taken measurements for. */
731	RTCPUSET TscDeltaObtainedCpuSet;
732	/** @} */
733
734	#ifdef SUPDRV_USE_TSC_DELTA_THREAD
735	/** @name TSC-delta measurement thread.
736	* @{ */
737	/** Spinlock protecting enmTscDeltaThreadState. */
738	RTSPINLOCK hTscDeltaSpinlock;
739	/** TSC-delta measurement thread. */
740	RTTHREAD hTscDeltaThread;
741	/** The event signalled during state changes to the TSC-delta thread. */
742	RTSEMEVENT hTscDeltaEvent;
743	/** The state of the TSC-delta measurement thread. */
744	SUPDRVTSCDELTATHREADSTATE enmTscDeltaThreadState;
745	/** Thread timeout time before rechecking state in ms. */
746	RTMSINTERVAL cMsTscDeltaTimeout;
747	/** Whether the TSC-delta measurement was successful. */
748	int32_t volatile rcTscDelta;
749	/** Tell the thread we want TSC-deltas for all CPUs with retries. */
750	bool fTscThreadRecomputeAllDeltas;
751	/** @} */
752	#endif
753
754	/*
755	* Note! The non-agnostic bits must be at the very end of the structure!
756	*/
757	#ifndef SUPDRV_AGNOSTIC
758	# ifdef RT_OS_WINDOWS
759	/** Callback object returned by ExCreateCallback. */
760	PCALLBACK_OBJECT pObjPowerCallback;
761	/** Callback handle returned by ExRegisterCallback. */
762	PVOID hPowerCallback;
763	# endif
764	#endif
765	} SUPDRVDEVEXT;
766
767	/** Calculates the index into g_apSessionHashTab.*/
768	#define SUPDRV_SESSION_HASH(a_pid) ( (a_pid) % RT_ELEMENTS(((SUPDRVDEVEXT *)NULL)->apSessionHashTab) )
769
770
771	RT_C_DECLS_BEGIN
772
773	/*******************************************************************************
774	* OS Specific Functions *
775	*******************************************************************************/
776	/**
777	* Called to clean up the session structure before it's freed.
778	*
779	* @param pDevExt The device globals.
780	* @param pSession The session that's being cleaned up.
781	*/
782	void VBOXCALL supdrvOSCleanupSession(PSUPDRVDEVEXT pDevExt, PSUPDRVSESSION pSession);
783
784	/**
785	* Called to let the OS specfic code perform additional insertion work while
786	* still under the protection of the hash table spinlock.
787	*
788	* @param pDevExt The device globals.
789	* @param pSession The session that was inserted.
790	* @param pvUser User context specified to the insert call.
791	*/
792	void VBOXCALL supdrvOSSessionHashTabInserted(PSUPDRVDEVEXT pDevExt, PSUPDRVSESSION pSession, void *pvUser);
793
794	/**
795	* Called to let the OS specfic code perform additional removal work while still
796	* under the protection of the hash table spinlock.
797	*
798	* @param pDevExt The device globals.
799	* @param pSession The session that was removed.
800	* @param pvUser User context specified to the remove call.
801	*/
802	void VBOXCALL supdrvOSSessionHashTabRemoved(PSUPDRVDEVEXT pDevExt, PSUPDRVSESSION pSession, void *pvUser);
803
804	void VBOXCALL supdrvOSObjInitCreator(PSUPDRVOBJ pObj, PSUPDRVSESSION pSession);
805	bool VBOXCALL supdrvOSObjCanAccess(PSUPDRVOBJ pObj, PSUPDRVSESSION pSession, const char pszObjName, int prc);
806	bool VBOXCALL supdrvOSGetForcedAsyncTscMode(PSUPDRVDEVEXT pDevExt);
807	bool VBOXCALL supdrvOSAreCpusOfflinedOnSuspend(void);
808	bool VBOXCALL supdrvOSAreTscDeltasInSync(void);
809	int VBOXCALL supdrvOSEnableVTx(bool fEnabled);
810	RTCCUINTREG VBOXCALL supdrvOSChangeCR4(RTCCUINTREG fOrMask, RTCCUINTREG fAndMask);
811	bool VBOXCALL supdrvOSSuspendVTxOnCpu(void);
812	void VBOXCALL supdrvOSResumeVTxOnCpu(bool fSuspended);
813
814	/**
815	* Try open the image using the native loader.
816	*
817	* @returns IPRT status code.
818	* @retval VERR_NOT_SUPPORTED if native loading isn't supported.
819	*
820	* @param pDevExt The device globals.
821	* @param pImage The image handle. pvImage should be set on
822	* success, pvImageAlloc can also be set if
823	* appropriate.
824	* @param pszFilename The file name - UTF-8, may containing UNIX
825	* slashes on non-UNIX systems.
826	*/
827	int VBOXCALL supdrvOSLdrOpen(PSUPDRVDEVEXT pDevExt, PSUPDRVLDRIMAGE pImage, const char *pszFilename);
828
829	/**
830	* Notification call indicating that a image is being opened for the first time.
831	*
832	* Can be used to log the load address of the image.
833	*
834	* @param pDevExt The device globals.
835	* @param pImage The image handle.
836	*/
837	void VBOXCALL supdrvOSLdrNotifyOpened(PSUPDRVDEVEXT pDevExt, PSUPDRVLDRIMAGE pImage);
838
839	/**
840	* Validates an entry point address.
841	*
842	* Called before supdrvOSLdrLoad.
843	*
844	* @returns IPRT status code.
845	* @param pDevExt The device globals.
846	* @param pImage The image data (still in the open state).
847	* @param pv The address within the image.
848	* @param pbImageBits The image bits as loaded by ring-3.
849	*/
850	int VBOXCALL supdrvOSLdrValidatePointer(PSUPDRVDEVEXT pDevExt, PSUPDRVLDRIMAGE pImage,
851	void pv, const uint8_t pbImageBits);
852
853	/**
854	* Load the image.
855	*
856	* @returns IPRT status code.
857	* @param pDevExt The device globals.
858	* @param pImage The image data (up to date). Adjust entrypoints
859	* and exports if necessary.
860	* @param pbImageBits The image bits as loaded by ring-3.
861	* @param pReq Pointer to the request packet so that the VMMR0
862	* entry points can be adjusted.
863	*/
864	int VBOXCALL supdrvOSLdrLoad(PSUPDRVDEVEXT pDevExt, PSUPDRVLDRIMAGE pImage, const uint8_t *pbImageBits, PSUPLDRLOAD pReq);
865
866
867	/**
868	* Unload the image.
869	*
870	* @param pDevExt The device globals.
871	* @param pImage The image data (mostly still valid).
872	*/
873	void VBOXCALL supdrvOSLdrUnload(PSUPDRVDEVEXT pDevExt, PSUPDRVLDRIMAGE pImage);
874
875
876	#ifdef SUPDRV_WITH_MSR_PROBER
877
878	/**
879	* Tries to read an MSR.
880	*
881	* @returns One of the listed VBox status codes.
882	* @retval VINF_SUCCESS if read successfully, value in *puValue.
883	* @retval VERR_ACCESS_DENIED if we couldn't read it (GP).
884	* @retval VERR_NOT_SUPPORTED if not supported.
885	*
886	* @param uMsr The MSR to read from.
887	* @param idCpu The CPU to read the MSR on. NIL_RTCPUID
888	* indicates any suitable CPU.
889	* @param puValue Where to return the value.
890	*/
891	int VBOXCALL supdrvOSMsrProberRead(uint32_t uMsr, RTCPUID idCpu, uint64_t *puValue);
892
893	/**
894	* Tries to write an MSR.
895	*
896	* @returns One of the listed VBox status codes.
897	* @retval VINF_SUCCESS if written successfully.
898	* @retval VERR_ACCESS_DENIED if we couldn't write the value to it (GP).
899	* @retval VERR_NOT_SUPPORTED if not supported.
900	*
901	* @param uMsr The MSR to write to.
902	* @param idCpu The CPU to write the MSR on. NIL_RTCPUID
903	* indicates any suitable CPU.
904	* @param uValue The value to write.
905	*/
906	int VBOXCALL supdrvOSMsrProberWrite(uint32_t uMsr, RTCPUID idCpu, uint64_t uValue);
907
908	/**
909	* Tries to modify an MSR value.
910	*
911	* @returns One of the listed VBox status codes.
912	* @retval VINF_SUCCESS if succeeded.
913	* @retval VERR_NOT_SUPPORTED if not supported.
914	*
915	* @param idCpu The CPU to modify the MSR on. NIL_RTCPUID
916	* indicates any suitable CPU.
917	* @param pReq The request packet with input arguments and
918	* where to store the results.
919	*/
920	int VBOXCALL supdrvOSMsrProberModify(RTCPUID idCpu, PSUPMSRPROBER pReq);
921
922	#endif /* SUPDRV_WITH_MSR_PROBER */
923
924	#if defined(RT_OS_DARWIN)
925	int VBOXCALL supdrvDarwinResumeSuspendedKbds(void);
926	#endif
927
928	/*******************************************************************************
929	* Shared Functions *
930	*******************************************************************************/
931	/* SUPDrv.c */
932	int VBOXCALL supdrvIOCtl(uintptr_t uIOCtl, PSUPDRVDEVEXT pDevExt, PSUPDRVSESSION pSession, PSUPREQHDR pReqHdr, size_t cbReq);
933	int VBOXCALL supdrvIOCtlFast(uintptr_t uIOCtl, VMCPUID idCpu, PSUPDRVDEVEXT pDevExt, PSUPDRVSESSION pSession);
934	int VBOXCALL supdrvIDC(uintptr_t uIOCtl, PSUPDRVDEVEXT pDevExt, PSUPDRVSESSION pSession, PSUPDRVIDCREQHDR pReqHdr);
935	int VBOXCALL supdrvInitDevExt(PSUPDRVDEVEXT pDevExt, size_t cbSession);
936	void VBOXCALL supdrvDeleteDevExt(PSUPDRVDEVEXT pDevExt);
937	int VBOXCALL supdrvCreateSession(PSUPDRVDEVEXT pDevExt, bool fUser, bool fUnrestricted, PSUPDRVSESSION *ppSession);
938	int VBOXCALL supdrvSessionHashTabInsert(PSUPDRVDEVEXT pDevExt, PSUPDRVSESSION pSession, PSUPDRVSESSION ppOsSessionPtr, void pvUser);
939	int VBOXCALL supdrvSessionHashTabRemove(PSUPDRVDEVEXT pDevExt, PSUPDRVSESSION pSession, void *pvUser);
940	PSUPDRVSESSION VBOXCALL supdrvSessionHashTabLookup(PSUPDRVDEVEXT pDevExt, RTPROCESS Process, RTR0PROCESS R0Process,
941	PSUPDRVSESSION *ppOsSessionPtr);
942	uint32_t VBOXCALL supdrvSessionRetain(PSUPDRVSESSION pSession);
943	uint32_t VBOXCALL supdrvSessionRelease(PSUPDRVSESSION pSession);
944
945	/* SUPDrvGip.cpp */
946	int VBOXCALL supdrvGipCreate(PSUPDRVDEVEXT pDevExt);
947	void VBOXCALL supdrvGipDestroy(PSUPDRVDEVEXT pDevExt);
948	int VBOXCALL supdrvIOCtl_TscDeltaMeasure(PSUPDRVDEVEXT pDevExt, PSUPDRVSESSION pSession, PSUPTSCDELTAMEASURE pReq);
949	int VBOXCALL supdrvIOCtl_TscRead(PSUPDRVDEVEXT pDevExt, PSUPDRVSESSION pSession, PSUPTSCREAD pReq);
950
951	/* SUPDrvTracer.cpp */
952	int VBOXCALL supdrvTracerInit(PSUPDRVDEVEXT pDevExt);
953	void VBOXCALL supdrvTracerTerm(PSUPDRVDEVEXT pDevExt);
954	void VBOXCALL supdrvTracerModuleUnloading(PSUPDRVDEVEXT pDevExt, PSUPDRVLDRIMAGE pImage);
955	void VBOXCALL supdrvTracerCleanupSession(PSUPDRVDEVEXT pDevExt, PSUPDRVSESSION pSession);
956	int VBOXCALL supdrvIOCtl_TracerUmodRegister(PSUPDRVDEVEXT pDevExt, PSUPDRVSESSION pSession,
957	RTR3PTR R3PtrVtgHdr, RTUINTPTR uVtgHdrAddr,
958	RTR3PTR R3PtrStrTab, uint32_t cbStrTab,
959	const char *pszModName, uint32_t fFlags);
960	int VBOXCALL supdrvIOCtl_TracerUmodDeregister(PSUPDRVDEVEXT pDevExt, PSUPDRVSESSION pSession, RTR3PTR R3PtrVtgHdr);
961	void VBOXCALL supdrvIOCtl_TracerUmodProbeFire(PSUPDRVDEVEXT pDevExt, PSUPDRVSESSION pSession, PSUPDRVTRACERUSRCTX pCtx);
962	int VBOXCALL supdrvIOCtl_TracerOpen(PSUPDRVDEVEXT pDevExt, PSUPDRVSESSION pSession, uint32_t uCookie, uintptr_t uArg);
963	int VBOXCALL supdrvIOCtl_TracerClose(PSUPDRVDEVEXT pDevExt, PSUPDRVSESSION pSession);
964	int VBOXCALL supdrvIOCtl_TracerIOCtl(PSUPDRVDEVEXT pDevExt, PSUPDRVSESSION pSession, uintptr_t uCmd, uintptr_t uArg, int32_t *piRetVal);
965	extern PFNRT g_pfnSupdrvProbeFireKernel;
966	DECLASM(void) supdrvTracerProbeFireStub(void);
967
968	#ifdef VBOX_WITH_NATIVE_DTRACE
969	const SUPDRVTRACERREG * VBOXCALL supdrvDTraceInit(void);
970	#endif
971
972	RT_C_DECLS_END
973
974	#endif
975

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source: vbox/trunk/src/VBox/HostDrivers/Support/SUPDrvInternal.h@ 56284

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