GVMMR0.cpp@ 95248

Last change on this file since 95248 was 94943, checked in by vboxsync, 3 years ago
VMM/CPUM: Copy the ring-0 host CPUMFEATURES structure into the VM structure upon creation and make ring-3 use it when present (not necessarily present if in NEM or IEM mode). bugref:10093
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1	/* $Id: GVMMR0.cpp 94943 2022-05-09 09:39:04Z vboxsync $ */
2	/** @file
3	* GVMM - Global VM Manager.
4	*/
5
6	/*
7	* Copyright (C) 2007-2022 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	/** @page pg_gvmm GVMM - The Global VM Manager
20	*
21	* The Global VM Manager lives in ring-0. Its main function at the moment is
22	* to manage a list of all running VMs, keep a ring-0 only structure (GVM) for
23	* each of them, and assign them unique identifiers (so GMM can track page
24	* owners). The GVMM also manage some of the host CPU resources, like the
25	* periodic preemption timer.
26	*
27	* The GVMM will create a ring-0 object for each VM when it is registered, this
28	* is both for session cleanup purposes and for having a point where it is
29	* possible to implement usage polices later (in SUPR0ObjRegister).
30	*
31	*
32	* @section sec_gvmm_ppt Periodic Preemption Timer (PPT)
33	*
34	* On system that sports a high resolution kernel timer API, we use per-cpu
35	* timers to generate interrupts that preempts VT-x, AMD-V and raw-mode guest
36	* execution. The timer frequency is calculating by taking the max
37	* TMCalcHostTimerFrequency for all VMs running on a CPU for the last ~160 ms
38	* (RT_ELEMENTS((PGVMMHOSTCPU)0, Ppt.aHzHistory) *
39	* GVMMHOSTCPU_PPT_HIST_INTERVAL_NS).
40	*
41	* The TMCalcHostTimerFrequency() part of the things gets its takes the max
42	* TMTimerSetFrequencyHint() value and adjusts by the current catch-up percent,
43	* warp drive percent and some fudge factors. VMMR0.cpp reports the result via
44	* GVMMR0SchedUpdatePeriodicPreemptionTimer() before switching to the VT-x,
45	* AMD-V and raw-mode execution environments.
46	*/
47
48
49	/*********************************************************************************************************************************
50	* Header Files *
51	*********************************************************************************************************************************/
52	#define LOG_GROUP LOG_GROUP_GVMM
53	#include <VBox/vmm/gvmm.h>
54	#include <VBox/vmm/gmm.h>
55	#include "GVMMR0Internal.h"
56	#include <VBox/vmm/dbgf.h>
57	#include <VBox/vmm/iom.h>
58	#include <VBox/vmm/pdm.h>
59	#include <VBox/vmm/pgm.h>
60	#include <VBox/vmm/vmm.h>
61	#ifdef VBOX_WITH_NEM_R0
62	# include <VBox/vmm/nem.h>
63	#endif
64	#include <VBox/vmm/vmcpuset.h>
65	#include <VBox/vmm/vmcc.h>
66	#include <VBox/param.h>
67	#include <VBox/err.h>
68
69	#include <iprt/asm.h>
70	#include <iprt/asm-amd64-x86.h>
71	#include <iprt/critsect.h>
72	#include <iprt/mem.h>
73	#include <iprt/semaphore.h>
74	#include <iprt/time.h>
75	#include <VBox/log.h>
76	#include <iprt/thread.h>
77	#include <iprt/process.h>
78	#include <iprt/param.h>
79	#include <iprt/string.h>
80	#include <iprt/assert.h>
81	#include <iprt/mem.h>
82	#include <iprt/memobj.h>
83	#include <iprt/mp.h>
84	#include <iprt/cpuset.h>
85	#include <iprt/spinlock.h>
86	#include <iprt/timer.h>
87
88	#include "dtrace/VBoxVMM.h"
89
90
91	/*********************************************************************************************************************************
92	* Defined Constants And Macros *
93	*********************************************************************************************************************************/
94	#if defined(RT_OS_LINUX) \|\| defined(RT_OS_SOLARIS) \|\| defined(RT_OS_WINDOWS) \|\| defined(DOXYGEN_RUNNING)
95	/** Define this to enable the periodic preemption timer. */
96	# define GVMM_SCHED_WITH_PPT
97	#endif
98
99	#if /defined(RT_OS_WINDOWS) \|\|/ defined(DOXYGEN_RUNNING)
100	/** Define this to enable the per-EMT high resolution wakeup timers. */
101	# define GVMM_SCHED_WITH_HR_WAKE_UP_TIMER
102	#endif
103
104
105	/** Special value that GVMMR0DeregisterVCpu sets. */
106	#define GVMM_RTNATIVETHREAD_DESTROYED (~(RTNATIVETHREAD)1)
107	AssertCompile(GVMM_RTNATIVETHREAD_DESTROYED != NIL_RTNATIVETHREAD);
108
109
110	/*********************************************************************************************************************************
111	* Structures and Typedefs *
112	*********************************************************************************************************************************/
113
114	/**
115	* Global VM handle.
116	*/
117	typedef struct GVMHANDLE
118	{
119	/** The index of the next handle in the list (free or used). (0 is nil.) */
120	uint16_t volatile iNext;
121	/** Our own index / handle value. */
122	uint16_t iSelf;
123	/** The process ID of the handle owner.
124	* This is used for access checks. */
125	RTPROCESS ProcId;
126	/** The pointer to the ring-0 only (aka global) VM structure. */
127	PGVM pGVM;
128	/** The virtual machine object. */
129	void *pvObj;
130	/** The session this VM is associated with. */
131	PSUPDRVSESSION pSession;
132	/** The ring-0 handle of the EMT0 thread.
133	* This is used for ownership checks as well as looking up a VM handle by thread
134	* at times like assertions. */
135	RTNATIVETHREAD hEMT0;
136	} GVMHANDLE;
137	/** Pointer to a global VM handle. */
138	typedef GVMHANDLE *PGVMHANDLE;
139
140	/** Number of GVM handles (including the NIL handle). */
141	#if HC_ARCH_BITS == 64
142	# define GVMM_MAX_HANDLES 8192
143	#else
144	# define GVMM_MAX_HANDLES 128
145	#endif
146
147	/**
148	* Per host CPU GVMM data.
149	*/
150	typedef struct GVMMHOSTCPU
151	{
152	/** Magic number (GVMMHOSTCPU_MAGIC). */
153	uint32_t volatile u32Magic;
154	/** The CPU ID. */
155	RTCPUID idCpu;
156	/** The CPU set index. */
157	uint32_t idxCpuSet;
158
159	#ifdef GVMM_SCHED_WITH_PPT
160	/** Periodic preemption timer data. */
161	struct
162	{
163	/** The handle to the periodic preemption timer. */
164	PRTTIMER pTimer;
165	/** Spinlock protecting the data below. */
166	RTSPINLOCK hSpinlock;
167	/** The smalles Hz that we need to care about. (static) */
168	uint32_t uMinHz;
169	/** The number of ticks between each historization. */
170	uint32_t cTicksHistoriziationInterval;
171	/** The current historization tick (counting up to
172	* cTicksHistoriziationInterval and then resetting). */
173	uint32_t iTickHistorization;
174	/** The current timer interval. This is set to 0 when inactive. */
175	uint32_t cNsInterval;
176	/** The current timer frequency. This is set to 0 when inactive. */
177	uint32_t uTimerHz;
178	/** The current max frequency reported by the EMTs.
179	* This gets historicize and reset by the timer callback. This is
180	* read without holding the spinlock, so needs atomic updating. */
181	uint32_t volatile uDesiredHz;
182	/** Whether the timer was started or not. */
183	bool volatile fStarted;
184	/** Set if we're starting timer. */
185	bool volatile fStarting;
186	/** The index of the next history entry (mod it). */
187	uint32_t iHzHistory;
188	/** Historicized uDesiredHz values. The array wraps around, new entries
189	* are added at iHzHistory. This is updated approximately every
190	* GVMMHOSTCPU_PPT_HIST_INTERVAL_NS by the timer callback. */
191	uint32_t aHzHistory[8];
192	/** Statistics counter for recording the number of interval changes. */
193	uint32_t cChanges;
194	/** Statistics counter for recording the number of timer starts. */
195	uint32_t cStarts;
196	} Ppt;
197	#endif /* GVMM_SCHED_WITH_PPT */
198
199	} GVMMHOSTCPU;
200	/** Pointer to the per host CPU GVMM data. */
201	typedef GVMMHOSTCPU *PGVMMHOSTCPU;
202	/** The GVMMHOSTCPU::u32Magic value (Petra, Tanya & Rachel Haden). */
203	#define GVMMHOSTCPU_MAGIC UINT32_C(0x19711011)
204	/** The interval on history entry should cover (approximately) give in
205	* nanoseconds. */
206	#define GVMMHOSTCPU_PPT_HIST_INTERVAL_NS UINT32_C(20000000)
207
208
209	/**
210	* The GVMM instance data.
211	*/
212	typedef struct GVMM
213	{
214	/** Eyecatcher / magic. */
215	uint32_t u32Magic;
216	/** The index of the head of the free handle chain. (0 is nil.) */
217	uint16_t volatile iFreeHead;
218	/** The index of the head of the active handle chain. (0 is nil.) */
219	uint16_t volatile iUsedHead;
220	/** The number of VMs. */
221	uint16_t volatile cVMs;
222	/** Alignment padding. */
223	uint16_t u16Reserved;
224	/** The number of EMTs. */
225	uint32_t volatile cEMTs;
226	/** The number of EMTs that have halted in GVMMR0SchedHalt. */
227	uint32_t volatile cHaltedEMTs;
228	/** Mini lock for restricting early wake-ups to one thread. */
229	bool volatile fDoingEarlyWakeUps;
230	bool afPadding[3]; /*< explicit alignment padding. /
231	/** When the next halted or sleeping EMT will wake up.
232	* This is set to 0 when it needs recalculating and to UINT64_MAX when
233	* there are no halted or sleeping EMTs in the GVMM. */
234	uint64_t uNsNextEmtWakeup;
235	/** The lock used to serialize VM creation, destruction and associated events that
236	* isn't performance critical. Owners may acquire the list lock. */
237	RTCRITSECT CreateDestroyLock;
238	/** The lock used to serialize used list updates and accesses.
239	* This indirectly includes scheduling since the scheduler will have to walk the
240	* used list to examin running VMs. Owners may not acquire any other locks. */
241	RTCRITSECTRW UsedLock;
242	/** The handle array.
243	* The size of this array defines the maximum number of currently running VMs.
244	* The first entry is unused as it represents the NIL handle. */
245	GVMHANDLE aHandles[GVMM_MAX_HANDLES];
246
247	/** @gcfgm{/GVMM/cEMTsMeansCompany, 32-bit, 0, UINT32_MAX, 1}
248	* The number of EMTs that means we no longer consider ourselves alone on a
249	* CPU/Core.
250	*/
251	uint32_t cEMTsMeansCompany;
252	/** @gcfgm{/GVMM/MinSleepAlone,32-bit, 0, 100000000, 750000, ns}
253	* The minimum sleep time for when we're alone, in nano seconds.
254	*/
255	uint32_t nsMinSleepAlone;
256	/** @gcfgm{/GVMM/MinSleepCompany,32-bit,0, 100000000, 15000, ns}
257	* The minimum sleep time for when we've got company, in nano seconds.
258	*/
259	uint32_t nsMinSleepCompany;
260	#ifdef GVMM_SCHED_WITH_HR_WAKE_UP_TIMER
261	/** @gcfgm{/GVMM/MinSleepWithHrWakeUp,32-bit,0, 100000000, 5000, ns}
262	* The minimum sleep time for when we've got a high-resolution wake-up timer, in
263	* nano seconds.
264	*/
265	uint32_t nsMinSleepWithHrTimer;
266	#endif
267	/** @gcfgm{/GVMM/EarlyWakeUp1, 32-bit, 0, 100000000, 25000, ns}
268	* The limit for the first round of early wake-ups, given in nano seconds.
269	*/
270	uint32_t nsEarlyWakeUp1;
271	/** @gcfgm{/GVMM/EarlyWakeUp2, 32-bit, 0, 100000000, 50000, ns}
272	* The limit for the second round of early wake-ups, given in nano seconds.
273	*/
274	uint32_t nsEarlyWakeUp2;
275
276	/** Set if we're doing early wake-ups.
277	* This reflects nsEarlyWakeUp1 and nsEarlyWakeUp2. */
278	bool volatile fDoEarlyWakeUps;
279
280	/** The number of entries in the host CPU array (aHostCpus). */
281	uint32_t cHostCpus;
282	/** Per host CPU data (variable length). */
283	GVMMHOSTCPU aHostCpus[1];
284	} GVMM;
285	AssertCompileMemberAlignment(GVMM, CreateDestroyLock, 8);
286	AssertCompileMemberAlignment(GVMM, UsedLock, 8);
287	AssertCompileMemberAlignment(GVMM, uNsNextEmtWakeup, 8);
288	/** Pointer to the GVMM instance data. */
289	typedef GVMM *PGVMM;
290
291	/** The GVMM::u32Magic value (Charlie Haden). */
292	#define GVMM_MAGIC UINT32_C(0x19370806)
293
294
295
296	/*********************************************************************************************************************************
297	* Global Variables *
298	*********************************************************************************************************************************/
299	/** Pointer to the GVMM instance data.
300	* (Just my general dislike for global variables.) */
301	static PGVMM g_pGVMM = NULL;
302
303	/** Macro for obtaining and validating the g_pGVMM pointer.
304	* On failure it will return from the invoking function with the specified return value.
305	*
306	* @param pGVMM The name of the pGVMM variable.
307	* @param rc The return value on failure. Use VERR_GVMM_INSTANCE for VBox
308	* status codes.
309	*/
310	#define GVMM_GET_VALID_INSTANCE(pGVMM, rc) \
311	do { \
312	(pGVMM) = g_pGVMM;\
313	AssertPtrReturn((pGVMM), (rc)); \
314	AssertMsgReturn((pGVMM)->u32Magic == GVMM_MAGIC, ("%p - %#x\n", (pGVMM), (pGVMM)->u32Magic), (rc)); \
315	} while (0)
316
317	/** Macro for obtaining and validating the g_pGVMM pointer, void function variant.
318	* On failure it will return from the invoking function.
319	*
320	* @param pGVMM The name of the pGVMM variable.
321	*/
322	#define GVMM_GET_VALID_INSTANCE_VOID(pGVMM) \
323	do { \
324	(pGVMM) = g_pGVMM;\
325	AssertPtrReturnVoid((pGVMM)); \
326	AssertMsgReturnVoid((pGVMM)->u32Magic == GVMM_MAGIC, ("%p - %#x\n", (pGVMM), (pGVMM)->u32Magic)); \
327	} while (0)
328
329
330	/*********************************************************************************************************************************
331	* Internal Functions *
332	*********************************************************************************************************************************/
333	static void gvmmR0InitPerVMData(PGVM pGVM, int16_t hSelf, VMCPUID cCpus, PSUPDRVSESSION pSession);
334	static DECLCALLBACK(void) gvmmR0HandleObjDestructor(void pvObj, void pvGVMM, void *pvHandle);
335	static int gvmmR0ByGVM(PGVM pGVM, PGVMM *ppGVMM, bool fTakeUsedLock);
336	static int gvmmR0ByGVMandEMT(PGVM pGVM, VMCPUID idCpu, PGVMM *ppGVMM);
337
338	#ifdef GVMM_SCHED_WITH_PPT
339	static DECLCALLBACK(void) gvmmR0SchedPeriodicPreemptionTimerCallback(PRTTIMER pTimer, void *pvUser, uint64_t iTick);
340	#endif
341	#ifdef GVMM_SCHED_WITH_HR_WAKE_UP_TIMER
342	static DECLCALLBACK(void) gvmmR0EmtWakeUpTimerCallback(PRTTIMER pTimer, void *pvUser, uint64_t iTick);
343	#endif
344
345
346	/**
347	* Initializes the GVMM.
348	*
349	* This is called while owning the loader semaphore (see supdrvIOCtl_LdrLoad()).
350	*
351	* @returns VBox status code.
352	*/
353	GVMMR0DECL(int) GVMMR0Init(void)
354	{
355	LogFlow(("GVMMR0Init:\n"));
356
357	/*
358	* Allocate and initialize the instance data.
359	*/
360	uint32_t cHostCpus = RTMpGetArraySize();
361	AssertMsgReturn(cHostCpus > 0 && cHostCpus < _64K, ("%d", (int)cHostCpus), VERR_GVMM_HOST_CPU_RANGE);
362
363	PGVMM pGVMM = (PGVMM)RTMemAllocZ(RT_UOFFSETOF_DYN(GVMM, aHostCpus[cHostCpus]));
364	if (!pGVMM)
365	return VERR_NO_MEMORY;
366	int rc = RTCritSectInitEx(&pGVMM->CreateDestroyLock, 0, NIL_RTLOCKVALCLASS, RTLOCKVAL_SUB_CLASS_NONE,
367	"GVMM-CreateDestroyLock");
368	if (RT_SUCCESS(rc))
369	{
370	rc = RTCritSectRwInitEx(&pGVMM->UsedLock, 0, NIL_RTLOCKVALCLASS, RTLOCKVAL_SUB_CLASS_NONE, "GVMM-UsedLock");
371	if (RT_SUCCESS(rc))
372	{
373	pGVMM->u32Magic = GVMM_MAGIC;
374	pGVMM->iUsedHead = 0;
375	pGVMM->iFreeHead = 1;
376
377	/* the nil handle */
378	pGVMM->aHandles[0].iSelf = 0;
379	pGVMM->aHandles[0].iNext = 0;
380
381	/* the tail */
382	unsigned i = RT_ELEMENTS(pGVMM->aHandles) - 1;
383	pGVMM->aHandles[i].iSelf = i;
384	pGVMM->aHandles[i].iNext = 0; /* nil */
385
386	/* the rest */
387	while (i-- > 1)
388	{
389	pGVMM->aHandles[i].iSelf = i;
390	pGVMM->aHandles[i].iNext = i + 1;
391	}
392
393	/* The default configuration values. */
394	uint32_t cNsResolution = RTSemEventMultiGetResolution();
395	pGVMM->cEMTsMeansCompany = 1; /** @todo should be adjusted to relative to the cpu count or something... */
396	if (cNsResolution >= 5*RT_NS_100US)
397	{
398	pGVMM->nsMinSleepAlone = 750000 /* ns (0.750 ms) /; /* @todo this should be adjusted to be 75% (or something) of the scheduler granularity... */
399	pGVMM->nsMinSleepCompany = 15000 /* ns (0.015 ms) */;
400	pGVMM->nsEarlyWakeUp1 = 25000 /* ns (0.025 ms) */;
401	pGVMM->nsEarlyWakeUp2 = 50000 /* ns (0.050 ms) */;
402	}
403	else if (cNsResolution > RT_NS_100US)
404	{
405	pGVMM->nsMinSleepAlone = cNsResolution / 2;
406	pGVMM->nsMinSleepCompany = cNsResolution / 4;
407	pGVMM->nsEarlyWakeUp1 = 0;
408	pGVMM->nsEarlyWakeUp2 = 0;
409	}
410	else
411	{
412	pGVMM->nsMinSleepAlone = 2000;
413	pGVMM->nsMinSleepCompany = 2000;
414	pGVMM->nsEarlyWakeUp1 = 0;
415	pGVMM->nsEarlyWakeUp2 = 0;
416	}
417	#ifdef GVMM_SCHED_WITH_HR_WAKE_UP_TIMER
418	pGVMM->nsMinSleepWithHrTimer = 5000 /* ns (0.005 ms) */;
419	#endif
420	pGVMM->fDoEarlyWakeUps = pGVMM->nsEarlyWakeUp1 > 0 && pGVMM->nsEarlyWakeUp2 > 0;
421
422	/* The host CPU data. */
423	pGVMM->cHostCpus = cHostCpus;
424	uint32_t iCpu = cHostCpus;
425	RTCPUSET PossibleSet;
426	RTMpGetSet(&PossibleSet);
427	while (iCpu-- > 0)
428	{
429	pGVMM->aHostCpus[iCpu].idxCpuSet = iCpu;
430	#ifdef GVMM_SCHED_WITH_PPT
431	pGVMM->aHostCpus[iCpu].Ppt.pTimer = NULL;
432	pGVMM->aHostCpus[iCpu].Ppt.hSpinlock = NIL_RTSPINLOCK;
433	pGVMM->aHostCpus[iCpu].Ppt.uMinHz = 5; /** @todo Add some API which figures this one out. (not that important) */
434	pGVMM->aHostCpus[iCpu].Ppt.cTicksHistoriziationInterval = 1;
435	//pGVMM->aHostCpus[iCpu].Ppt.iTickHistorization = 0;
436	//pGVMM->aHostCpus[iCpu].Ppt.cNsInterval = 0;
437	//pGVMM->aHostCpus[iCpu].Ppt.uTimerHz = 0;
438	//pGVMM->aHostCpus[iCpu].Ppt.uDesiredHz = 0;
439	//pGVMM->aHostCpus[iCpu].Ppt.fStarted = false;
440	//pGVMM->aHostCpus[iCpu].Ppt.fStarting = false;
441	//pGVMM->aHostCpus[iCpu].Ppt.iHzHistory = 0;
442	//pGVMM->aHostCpus[iCpu].Ppt.aHzHistory = {0};
443	#endif
444
445	if (RTCpuSetIsMember(&PossibleSet, iCpu))
446	{
447	pGVMM->aHostCpus[iCpu].idCpu = RTMpCpuIdFromSetIndex(iCpu);
448	pGVMM->aHostCpus[iCpu].u32Magic = GVMMHOSTCPU_MAGIC;
449
450	#ifdef GVMM_SCHED_WITH_PPT
451	rc = RTTimerCreateEx(&pGVMM->aHostCpus[iCpu].Ppt.pTimer,
452	5010001000 /* whatever */,
453	RTTIMER_FLAGS_CPU(iCpu) \| RTTIMER_FLAGS_HIGH_RES,
454	gvmmR0SchedPeriodicPreemptionTimerCallback,
455	&pGVMM->aHostCpus[iCpu]);
456	if (RT_SUCCESS(rc))
457	{
458	rc = RTSpinlockCreate(&pGVMM->aHostCpus[iCpu].Ppt.hSpinlock, RTSPINLOCK_FLAGS_INTERRUPT_SAFE, "GVMM/CPU");
459	if (RT_FAILURE(rc))
460	LogRel(("GVMMR0Init: RTSpinlockCreate failed for #%u (%d)\n", iCpu, rc));
461	}
462	else
463	LogRel(("GVMMR0Init: RTTimerCreateEx failed for #%u (%d)\n", iCpu, rc));
464	if (RT_FAILURE(rc))
465	{
466	while (iCpu < cHostCpus)
467	{
468	RTTimerDestroy(pGVMM->aHostCpus[iCpu].Ppt.pTimer);
469	RTSpinlockDestroy(pGVMM->aHostCpus[iCpu].Ppt.hSpinlock);
470	pGVMM->aHostCpus[iCpu].Ppt.hSpinlock = NIL_RTSPINLOCK;
471	iCpu++;
472	}
473	break;
474	}
475	#endif
476	}
477	else
478	{
479	pGVMM->aHostCpus[iCpu].idCpu = NIL_RTCPUID;
480	pGVMM->aHostCpus[iCpu].u32Magic = 0;
481	}
482	}
483	if (RT_SUCCESS(rc))
484	{
485	g_pGVMM = pGVMM;
486	LogFlow(("GVMMR0Init: pGVMM=%p cHostCpus=%u\n", pGVMM, cHostCpus));
487	return VINF_SUCCESS;
488	}
489
490	/* bail out. */
491	RTCritSectRwDelete(&pGVMM->UsedLock);
492	}
493	else
494	LogRel(("GVMMR0Init: RTCritSectRwInitEx failed (%d)\n", rc));
495	RTCritSectDelete(&pGVMM->CreateDestroyLock);
496	}
497	else
498	LogRel(("GVMMR0Init: RTCritSectInitEx failed (%d)\n", rc));
499
500	RTMemFree(pGVMM);
501	return rc;
502	}
503
504
505	/**
506	* Terminates the GVM.
507	*
508	* This is called while owning the loader semaphore (see supdrvLdrFree()).
509	* And unless something is wrong, there should be absolutely no VMs
510	* registered at this point.
511	*/
512	GVMMR0DECL(void) GVMMR0Term(void)
513	{
514	LogFlow(("GVMMR0Term:\n"));
515
516	PGVMM pGVMM = g_pGVMM;
517	g_pGVMM = NULL;
518	if (RT_UNLIKELY(!RT_VALID_PTR(pGVMM)))
519	{
520	SUPR0Printf("GVMMR0Term: pGVMM=%RKv\n", pGVMM);
521	return;
522	}
523
524	/*
525	* First of all, stop all active timers.
526	*/
527	uint32_t cActiveTimers = 0;
528	uint32_t iCpu = pGVMM->cHostCpus;
529	while (iCpu-- > 0)
530	{
531	ASMAtomicWriteU32(&pGVMM->aHostCpus[iCpu].u32Magic, ~GVMMHOSTCPU_MAGIC);
532	#ifdef GVMM_SCHED_WITH_PPT
533	if ( pGVMM->aHostCpus[iCpu].Ppt.pTimer != NULL
534	&& RT_SUCCESS(RTTimerStop(pGVMM->aHostCpus[iCpu].Ppt.pTimer)))
535	cActiveTimers++;
536	#endif
537	}
538	if (cActiveTimers)
539	RTThreadSleep(1); /* fudge */
540
541	/*
542	* Invalidate the and free resources.
543	*/
544	pGVMM->u32Magic = ~GVMM_MAGIC;
545	RTCritSectRwDelete(&pGVMM->UsedLock);
546	RTCritSectDelete(&pGVMM->CreateDestroyLock);
547
548	pGVMM->iFreeHead = 0;
549	if (pGVMM->iUsedHead)
550	{
551	SUPR0Printf("GVMMR0Term: iUsedHead=%#x! (cVMs=%#x cEMTs=%#x)\n", pGVMM->iUsedHead, pGVMM->cVMs, pGVMM->cEMTs);
552	pGVMM->iUsedHead = 0;
553	}
554
555	#ifdef GVMM_SCHED_WITH_PPT
556	iCpu = pGVMM->cHostCpus;
557	while (iCpu-- > 0)
558	{
559	RTTimerDestroy(pGVMM->aHostCpus[iCpu].Ppt.pTimer);
560	pGVMM->aHostCpus[iCpu].Ppt.pTimer = NULL;
561	RTSpinlockDestroy(pGVMM->aHostCpus[iCpu].Ppt.hSpinlock);
562	pGVMM->aHostCpus[iCpu].Ppt.hSpinlock = NIL_RTSPINLOCK;
563	}
564	#endif
565
566	RTMemFree(pGVMM);
567	}
568
569
570	/**
571	* A quick hack for setting global config values.
572	*
573	* @returns VBox status code.
574	*
575	* @param pSession The session handle. Used for authentication.
576	* @param pszName The variable name.
577	* @param u64Value The new value.
578	*/
579	GVMMR0DECL(int) GVMMR0SetConfig(PSUPDRVSESSION pSession, const char *pszName, uint64_t u64Value)
580	{
581	/*
582	* Validate input.
583	*/
584	PGVMM pGVMM;
585	GVMM_GET_VALID_INSTANCE(pGVMM, VERR_GVMM_INSTANCE);
586	AssertPtrReturn(pSession, VERR_INVALID_HANDLE);
587	AssertPtrReturn(pszName, VERR_INVALID_POINTER);
588
589	/*
590	* String switch time!
591	*/
592	if (strncmp(pszName, RT_STR_TUPLE("/GVMM/")))
593	return VERR_CFGM_VALUE_NOT_FOUND; /* borrow status codes from CFGM... */
594	int rc = VINF_SUCCESS;
595	pszName += sizeof("/GVMM/") - 1;
596	if (!strcmp(pszName, "cEMTsMeansCompany"))
597	{
598	if (u64Value <= UINT32_MAX)
599	pGVMM->cEMTsMeansCompany = u64Value;
600	else
601	rc = VERR_OUT_OF_RANGE;
602	}
603	else if (!strcmp(pszName, "MinSleepAlone"))
604	{
605	if (u64Value <= RT_NS_100MS)
606	pGVMM->nsMinSleepAlone = u64Value;
607	else
608	rc = VERR_OUT_OF_RANGE;
609	}
610	else if (!strcmp(pszName, "MinSleepCompany"))
611	{
612	if (u64Value <= RT_NS_100MS)
613	pGVMM->nsMinSleepCompany = u64Value;
614	else
615	rc = VERR_OUT_OF_RANGE;
616	}
617	#ifdef GVMM_SCHED_WITH_HR_WAKE_UP_TIMER
618	else if (!strcmp(pszName, "MinSleepWithHrWakeUp"))
619	{
620	if (u64Value <= RT_NS_100MS)
621	pGVMM->nsMinSleepWithHrTimer = u64Value;
622	else
623	rc = VERR_OUT_OF_RANGE;
624	}
625	#endif
626	else if (!strcmp(pszName, "EarlyWakeUp1"))
627	{
628	if (u64Value <= RT_NS_100MS)
629	{
630	pGVMM->nsEarlyWakeUp1 = u64Value;
631	pGVMM->fDoEarlyWakeUps = pGVMM->nsEarlyWakeUp1 > 0 && pGVMM->nsEarlyWakeUp2 > 0;
632	}
633	else
634	rc = VERR_OUT_OF_RANGE;
635	}
636	else if (!strcmp(pszName, "EarlyWakeUp2"))
637	{
638	if (u64Value <= RT_NS_100MS)
639	{
640	pGVMM->nsEarlyWakeUp2 = u64Value;
641	pGVMM->fDoEarlyWakeUps = pGVMM->nsEarlyWakeUp1 > 0 && pGVMM->nsEarlyWakeUp2 > 0;
642	}
643	else
644	rc = VERR_OUT_OF_RANGE;
645	}
646	else
647	rc = VERR_CFGM_VALUE_NOT_FOUND;
648	return rc;
649	}
650
651
652	/**
653	* A quick hack for getting global config values.
654	*
655	* @returns VBox status code.
656	*
657	* @param pSession The session handle. Used for authentication.
658	* @param pszName The variable name.
659	* @param pu64Value Where to return the value.
660	*/
661	GVMMR0DECL(int) GVMMR0QueryConfig(PSUPDRVSESSION pSession, const char pszName, uint64_t pu64Value)
662	{
663	/*
664	* Validate input.
665	*/
666	PGVMM pGVMM;
667	GVMM_GET_VALID_INSTANCE(pGVMM, VERR_GVMM_INSTANCE);
668	AssertPtrReturn(pSession, VERR_INVALID_HANDLE);
669	AssertPtrReturn(pszName, VERR_INVALID_POINTER);
670	AssertPtrReturn(pu64Value, VERR_INVALID_POINTER);
671
672	/*
673	* String switch time!
674	*/
675	if (strncmp(pszName, RT_STR_TUPLE("/GVMM/")))
676	return VERR_CFGM_VALUE_NOT_FOUND; /* borrow status codes from CFGM... */
677	int rc = VINF_SUCCESS;
678	pszName += sizeof("/GVMM/") - 1;
679	if (!strcmp(pszName, "cEMTsMeansCompany"))
680	*pu64Value = pGVMM->cEMTsMeansCompany;
681	else if (!strcmp(pszName, "MinSleepAlone"))
682	*pu64Value = pGVMM->nsMinSleepAlone;
683	else if (!strcmp(pszName, "MinSleepCompany"))
684	*pu64Value = pGVMM->nsMinSleepCompany;
685	#ifdef GVMM_SCHED_WITH_HR_WAKE_UP_TIMER
686	else if (!strcmp(pszName, "MinSleepWithHrWakeUp"))
687	*pu64Value = pGVMM->nsMinSleepWithHrTimer;
688	#endif
689	else if (!strcmp(pszName, "EarlyWakeUp1"))
690	*pu64Value = pGVMM->nsEarlyWakeUp1;
691	else if (!strcmp(pszName, "EarlyWakeUp2"))
692	*pu64Value = pGVMM->nsEarlyWakeUp2;
693	else
694	rc = VERR_CFGM_VALUE_NOT_FOUND;
695	return rc;
696	}
697
698
699	/**
700	* Acquire the 'used' lock in shared mode.
701	*
702	* This prevents destruction of the VM while we're in ring-0.
703	*
704	* @returns IPRT status code, see RTSemFastMutexRequest.
705	* @param a_pGVMM The GVMM instance data.
706	* @sa GVMMR0_USED_SHARED_UNLOCK, GVMMR0_USED_EXCLUSIVE_LOCK
707	*/
708	#define GVMMR0_USED_SHARED_LOCK(a_pGVMM) RTCritSectRwEnterShared(&(a_pGVMM)->UsedLock)
709
710	/**
711	* Release the 'used' lock in when owning it in shared mode.
712	*
713	* @returns IPRT status code, see RTSemFastMutexRequest.
714	* @param a_pGVMM The GVMM instance data.
715	* @sa GVMMR0_USED_SHARED_LOCK
716	*/
717	#define GVMMR0_USED_SHARED_UNLOCK(a_pGVMM) RTCritSectRwLeaveShared(&(a_pGVMM)->UsedLock)
718
719	/**
720	* Acquire the 'used' lock in exclusive mode.
721	*
722	* Only use this function when making changes to the used list.
723	*
724	* @returns IPRT status code, see RTSemFastMutexRequest.
725	* @param a_pGVMM The GVMM instance data.
726	* @sa GVMMR0_USED_EXCLUSIVE_UNLOCK
727	*/
728	#define GVMMR0_USED_EXCLUSIVE_LOCK(a_pGVMM) RTCritSectRwEnterExcl(&(a_pGVMM)->UsedLock)
729
730	/**
731	* Release the 'used' lock when owning it in exclusive mode.
732	*
733	* @returns IPRT status code, see RTSemFastMutexRelease.
734	* @param a_pGVMM The GVMM instance data.
735	* @sa GVMMR0_USED_EXCLUSIVE_LOCK, GVMMR0_USED_SHARED_UNLOCK
736	*/
737	#define GVMMR0_USED_EXCLUSIVE_UNLOCK(a_pGVMM) RTCritSectRwLeaveExcl(&(a_pGVMM)->UsedLock)
738
739
740	/**
741	* Try acquire the 'create & destroy' lock.
742	*
743	* @returns IPRT status code, see RTSemFastMutexRequest.
744	* @param pGVMM The GVMM instance data.
745	*/
746	DECLINLINE(int) gvmmR0CreateDestroyLock(PGVMM pGVMM)
747	{
748	LogFlow(("++gvmmR0CreateDestroyLock(%p)\n", pGVMM));
749	int rc = RTCritSectEnter(&pGVMM->CreateDestroyLock);
750	LogFlow(("gvmmR0CreateDestroyLock(%p)->%Rrc\n", pGVMM, rc));
751	return rc;
752	}
753
754
755	/**
756	* Release the 'create & destroy' lock.
757	*
758	* @returns IPRT status code, see RTSemFastMutexRequest.
759	* @param pGVMM The GVMM instance data.
760	*/
761	DECLINLINE(int) gvmmR0CreateDestroyUnlock(PGVMM pGVMM)
762	{
763	LogFlow(("--gvmmR0CreateDestroyUnlock(%p)\n", pGVMM));
764	int rc = RTCritSectLeave(&pGVMM->CreateDestroyLock);
765	AssertRC(rc);
766	return rc;
767	}
768
769
770	/**
771	* Request wrapper for the GVMMR0CreateVM API.
772	*
773	* @returns VBox status code.
774	* @param pReq The request buffer.
775	* @param pSession The session handle. The VM will be associated with this.
776	*/
777	GVMMR0DECL(int) GVMMR0CreateVMReq(PGVMMCREATEVMREQ pReq, PSUPDRVSESSION pSession)
778	{
779	/*
780	* Validate the request.
781	*/
782	if (!RT_VALID_PTR(pReq))
783	return VERR_INVALID_POINTER;
784	if (pReq->Hdr.cbReq != sizeof(*pReq))
785	return VERR_INVALID_PARAMETER;
786	if (pReq->pSession != pSession)
787	return VERR_INVALID_POINTER;
788
789	/*
790	* Execute it.
791	*/
792	PGVM pGVM;
793	pReq->pVMR0 = NULL;
794	pReq->pVMR3 = NIL_RTR3PTR;
795	int rc = GVMMR0CreateVM(pSession, pReq->cCpus, &pGVM);
796	if (RT_SUCCESS(rc))
797	{
798	pReq->pVMR0 = pGVM; /** @todo don't expose this to ring-3, use a unique random number instead. */
799	pReq->pVMR3 = pGVM->pVMR3;
800	}
801	return rc;
802	}
803
804
805	/**
806	* Allocates the VM structure and registers it with GVM.
807	*
808	* The caller will become the VM owner and there by the EMT.
809	*
810	* @returns VBox status code.
811	* @param pSession The support driver session.
812	* @param cCpus Number of virtual CPUs for the new VM.
813	* @param ppGVM Where to store the pointer to the VM structure.
814	*
815	* @thread EMT.
816	*/
817	GVMMR0DECL(int) GVMMR0CreateVM(PSUPDRVSESSION pSession, uint32_t cCpus, PGVM *ppGVM)
818	{
819	LogFlow(("GVMMR0CreateVM: pSession=%p\n", pSession));
820	PGVMM pGVMM;
821	GVMM_GET_VALID_INSTANCE(pGVMM, VERR_GVMM_INSTANCE);
822
823	AssertPtrReturn(ppGVM, VERR_INVALID_POINTER);
824	*ppGVM = NULL;
825
826	if ( cCpus == 0
827	\|\| cCpus > VMM_MAX_CPU_COUNT)
828	return VERR_INVALID_PARAMETER;
829
830	RTNATIVETHREAD hEMT0 = RTThreadNativeSelf();
831	AssertReturn(hEMT0 != NIL_RTNATIVETHREAD, VERR_GVMM_BROKEN_IPRT);
832	RTPROCESS ProcId = RTProcSelf();
833	AssertReturn(ProcId != NIL_RTPROCESS, VERR_GVMM_BROKEN_IPRT);
834
835	/*
836	* The whole allocation process is protected by the lock.
837	*/
838	int rc = gvmmR0CreateDestroyLock(pGVMM);
839	AssertRCReturn(rc, rc);
840
841	/*
842	* Only one VM per session.
843	*/
844	if (SUPR0GetSessionVM(pSession) != NULL)
845	{
846	gvmmR0CreateDestroyUnlock(pGVMM);
847	SUPR0Printf("GVMMR0CreateVM: The session %p already got a VM: %p\n", pSession, SUPR0GetSessionVM(pSession));
848	return VERR_ALREADY_EXISTS;
849	}
850
851	/*
852	* Allocate a handle first so we don't waste resources unnecessarily.
853	*/
854	uint16_t iHandle = pGVMM->iFreeHead;
855	if (iHandle)
856	{
857	PGVMHANDLE pHandle = &pGVMM->aHandles[iHandle];
858
859	/* consistency checks, a bit paranoid as always. */
860	if ( !pHandle->pGVM
861	&& !pHandle->pvObj
862	&& pHandle->iSelf == iHandle)
863	{
864	pHandle->pvObj = SUPR0ObjRegister(pSession, SUPDRVOBJTYPE_VM, gvmmR0HandleObjDestructor, pGVMM, pHandle);
865	if (pHandle->pvObj)
866	{
867	/*
868	* Move the handle from the free to used list and perform permission checks.
869	*/
870	rc = GVMMR0_USED_EXCLUSIVE_LOCK(pGVMM);
871	AssertRC(rc);
872
873	pGVMM->iFreeHead = pHandle->iNext;
874	pHandle->iNext = pGVMM->iUsedHead;
875	pGVMM->iUsedHead = iHandle;
876	pGVMM->cVMs++;
877
878	pHandle->pGVM = NULL;
879	pHandle->pSession = pSession;
880	pHandle->hEMT0 = NIL_RTNATIVETHREAD;
881	pHandle->ProcId = NIL_RTPROCESS;
882
883	GVMMR0_USED_EXCLUSIVE_UNLOCK(pGVMM);
884
885	rc = SUPR0ObjVerifyAccess(pHandle->pvObj, pSession, NULL);
886	if (RT_SUCCESS(rc))
887	{
888	/*
889	* Allocate memory for the VM structure (combined VM + GVM).
890	*/
891	const uint32_t cbVM = RT_UOFFSETOF_DYN(GVM, aCpus[cCpus]);
892	const uint32_t cPages = RT_ALIGN_32(cbVM, HOST_PAGE_SIZE) >> HOST_PAGE_SHIFT;
893	RTR0MEMOBJ hVMMemObj = NIL_RTR0MEMOBJ;
894	rc = RTR0MemObjAllocPage(&hVMMemObj, cPages << HOST_PAGE_SHIFT, false /* fExecutable */);
895	if (RT_SUCCESS(rc))
896	{
897	PGVM pGVM = (PGVM)RTR0MemObjAddress(hVMMemObj);
898	AssertPtr(pGVM);
899
900	/*
901	* Initialise the structure.
902	*/
903	RT_BZERO(pGVM, cPages << HOST_PAGE_SHIFT);
904	gvmmR0InitPerVMData(pGVM, iHandle, cCpus, pSession);
905	pGVM->gvmm.s.VMMemObj = hVMMemObj;
906	rc = GMMR0InitPerVMData(pGVM);
907	int rc2 = PGMR0InitPerVMData(pGVM, hVMMemObj);
908	int rc3 = VMMR0InitPerVMData(pGVM);
909	CPUMR0InitPerVMData(pGVM);
910	DBGFR0InitPerVMData(pGVM);
911	PDMR0InitPerVMData(pGVM);
912	IOMR0InitPerVMData(pGVM);
913	TMR0InitPerVMData(pGVM);
914	if (RT_SUCCESS(rc) && RT_SUCCESS(rc2) && RT_SUCCESS(rc3))
915	{
916	/*
917	* Allocate page array.
918	* This currently have to be made available to ring-3, but this is should change eventually.
919	*/
920	rc = RTR0MemObjAllocPage(&pGVM->gvmm.s.VMPagesMemObj, cPages * sizeof(SUPPAGE), false /* fExecutable */);
921	if (RT_SUCCESS(rc))
922	{
923	PSUPPAGE paPages = (PSUPPAGE)RTR0MemObjAddress(pGVM->gvmm.s.VMPagesMemObj); AssertPtr(paPages);
924	for (uint32_t iPage = 0; iPage < cPages; iPage++)
925	{
926	paPages[iPage].uReserved = 0;
927	paPages[iPage].Phys = RTR0MemObjGetPagePhysAddr(pGVM->gvmm.s.VMMemObj, iPage);
928	Assert(paPages[iPage].Phys != NIL_RTHCPHYS);
929	}
930
931	/*
932	* Map the page array, VM and VMCPU structures into ring-3.
933	*/
934	AssertCompileSizeAlignment(VM, HOST_PAGE_SIZE);
935	rc = RTR0MemObjMapUserEx(&pGVM->gvmm.s.VMMapObj, pGVM->gvmm.s.VMMemObj, (RTR3PTR)-1, 0,
936	RTMEM_PROT_READ \| RTMEM_PROT_WRITE, NIL_RTR0PROCESS,
937	0 /offSub/, sizeof(VM));
938	for (VMCPUID i = 0; i < cCpus && RT_SUCCESS(rc); i++)
939	{
940	AssertCompileSizeAlignment(VMCPU, HOST_PAGE_SIZE);
941	rc = RTR0MemObjMapUserEx(&pGVM->aCpus[i].gvmm.s.VMCpuMapObj, pGVM->gvmm.s.VMMemObj,
942	(RTR3PTR)-1, 0, RTMEM_PROT_READ \| RTMEM_PROT_WRITE, NIL_RTR0PROCESS,
943	RT_UOFFSETOF_DYN(GVM, aCpus[i]), sizeof(VMCPU));
944	}
945	if (RT_SUCCESS(rc))
946	rc = RTR0MemObjMapUser(&pGVM->gvmm.s.VMPagesMapObj, pGVM->gvmm.s.VMPagesMemObj, (RTR3PTR)-1,
947	0 /* uAlignment */, RTMEM_PROT_READ \| RTMEM_PROT_WRITE,
948	NIL_RTR0PROCESS);
949	if (RT_SUCCESS(rc))
950	{
951	/*
952	* Initialize all the VM pointers.
953	*/
954	PVMR3 pVMR3 = RTR0MemObjAddressR3(pGVM->gvmm.s.VMMapObj);
955	AssertMsg(RTR0MemUserIsValidAddr(pVMR3) && pVMR3 != NIL_RTR3PTR, ("%p\n", pVMR3));
956
957	for (VMCPUID i = 0; i < cCpus; i++)
958	{
959	pGVM->aCpus[i].pVMR0 = pGVM;
960	pGVM->aCpus[i].pVMR3 = pVMR3;
961	pGVM->apCpusR3[i] = RTR0MemObjAddressR3(pGVM->aCpus[i].gvmm.s.VMCpuMapObj);
962	pGVM->aCpus[i].pVCpuR3 = pGVM->apCpusR3[i];
963	pGVM->apCpusR0[i] = &pGVM->aCpus[i];
964	AssertMsg(RTR0MemUserIsValidAddr(pGVM->apCpusR3[i]) && pGVM->apCpusR3[i] != NIL_RTR3PTR,
965	("apCpusR3[%u]=%p\n", i, pGVM->apCpusR3[i]));
966	}
967
968	pGVM->paVMPagesR3 = RTR0MemObjAddressR3(pGVM->gvmm.s.VMPagesMapObj);
969	AssertMsg(RTR0MemUserIsValidAddr(pGVM->paVMPagesR3) && pGVM->paVMPagesR3 != NIL_RTR3PTR,
970	("%p\n", pGVM->paVMPagesR3));
971
972	#ifdef GVMM_SCHED_WITH_HR_WAKE_UP_TIMER
973	/*
974	* Create the high resolution wake-up timer for EMT 0, ignore failures.
975	*/
976	if (RTTimerCanDoHighResolution())
977	{
978	int rc4 = RTTimerCreateEx(&pGVM->aCpus[0].gvmm.s.hHrWakeUpTimer,
979	0 /one-shot, no interval/,
980	RTTIMER_FLAGS_HIGH_RES, gvmmR0EmtWakeUpTimerCallback,
981	&pGVM->aCpus[0]);
982	if (RT_FAILURE(rc4))
983	pGVM->aCpus[0].gvmm.s.hHrWakeUpTimer = NULL;
984	}
985	#endif
986
987	/*
988	* Complete the handle - take the UsedLock sem just to be careful.
989	*/
990	rc = GVMMR0_USED_EXCLUSIVE_LOCK(pGVMM);
991	AssertRC(rc);
992
993	pHandle->pGVM = pGVM;
994	pHandle->hEMT0 = hEMT0;
995	pHandle->ProcId = ProcId;
996	pGVM->pVMR3 = pVMR3;
997	pGVM->pVMR3Unsafe = pVMR3;
998	pGVM->aCpus[0].hEMT = hEMT0;
999	pGVM->aCpus[0].hNativeThreadR0 = hEMT0;
1000	pGVM->aCpus[0].cEmtHashCollisions = 0;
1001	uint32_t const idxHash = GVMM_EMT_HASH_1(hEMT0);
1002	pGVM->aCpus[0].gvmm.s.idxEmtHash = (uint16_t)idxHash;
1003	pGVM->gvmm.s.aEmtHash[idxHash].hNativeEmt = hEMT0;
1004	pGVM->gvmm.s.aEmtHash[idxHash].idVCpu = 0;
1005	pGVMM->cEMTs += cCpus;
1006
1007	/* Associate it with the session and create the context hook for EMT0. */
1008	rc = SUPR0SetSessionVM(pSession, pGVM, pGVM);
1009	if (RT_SUCCESS(rc))
1010	{
1011	rc = VMMR0ThreadCtxHookCreateForEmt(&pGVM->aCpus[0]);
1012	if (RT_SUCCESS(rc))
1013	{
1014	/*
1015	* Done!
1016	*/
1017	VBOXVMM_R0_GVMM_VM_CREATED(pGVM, pGVM, ProcId, (void *)hEMT0, cCpus);
1018
1019	GVMMR0_USED_EXCLUSIVE_UNLOCK(pGVMM);
1020	gvmmR0CreateDestroyUnlock(pGVMM);
1021
1022	CPUMR0RegisterVCpuThread(&pGVM->aCpus[0]);
1023
1024	*ppGVM = pGVM;
1025	Log(("GVMMR0CreateVM: pVMR3=%p pGVM=%p hGVM=%d\n", pVMR3, pGVM, iHandle));
1026	return VINF_SUCCESS;
1027	}
1028
1029	SUPR0SetSessionVM(pSession, NULL, NULL);
1030	}
1031	GVMMR0_USED_EXCLUSIVE_UNLOCK(pGVMM);
1032	}
1033
1034	/* Cleanup mappings. */
1035	if (pGVM->gvmm.s.VMMapObj != NIL_RTR0MEMOBJ)
1036	{
1037	RTR0MemObjFree(pGVM->gvmm.s.VMMapObj, false /* fFreeMappings */);
1038	pGVM->gvmm.s.VMMapObj = NIL_RTR0MEMOBJ;
1039	}
1040	for (VMCPUID i = 0; i < cCpus; i++)
1041	if (pGVM->aCpus[i].gvmm.s.VMCpuMapObj != NIL_RTR0MEMOBJ)
1042	{
1043	RTR0MemObjFree(pGVM->aCpus[i].gvmm.s.VMCpuMapObj, false /* fFreeMappings */);
1044	pGVM->aCpus[i].gvmm.s.VMCpuMapObj = NIL_RTR0MEMOBJ;
1045	}
1046	if (pGVM->gvmm.s.VMPagesMapObj != NIL_RTR0MEMOBJ)
1047	{
1048	RTR0MemObjFree(pGVM->gvmm.s.VMPagesMapObj, false /* fFreeMappings */);
1049	pGVM->gvmm.s.VMPagesMapObj = NIL_RTR0MEMOBJ;
1050	}
1051	}
1052	}
1053	else
1054	{
1055	if (RT_SUCCESS_NP(rc))
1056	rc = rc2;
1057	if (RT_SUCCESS_NP(rc))
1058	rc = rc3;
1059	}
1060	}
1061	}
1062	/* else: The user wasn't permitted to create this VM. */
1063
1064	/*
1065	* The handle will be freed by gvmmR0HandleObjDestructor as we release the
1066	* object reference here. A little extra mess because of non-recursive lock.
1067	*/
1068	void *pvObj = pHandle->pvObj;
1069	pHandle->pvObj = NULL;
1070	gvmmR0CreateDestroyUnlock(pGVMM);
1071
1072	SUPR0ObjRelease(pvObj, pSession);
1073
1074	SUPR0Printf("GVMMR0CreateVM: failed, rc=%Rrc\n", rc);
1075	return rc;
1076	}
1077
1078	rc = VERR_NO_MEMORY;
1079	}
1080	else
1081	rc = VERR_GVMM_IPE_1;
1082	}
1083	else
1084	rc = VERR_GVM_TOO_MANY_VMS;
1085
1086	gvmmR0CreateDestroyUnlock(pGVMM);
1087	return rc;
1088	}
1089
1090
1091	/**
1092	* Initializes the per VM data belonging to GVMM.
1093	*
1094	* @param pGVM Pointer to the global VM structure.
1095	* @param hSelf The handle.
1096	* @param cCpus The CPU count.
1097	* @param pSession The session this VM is associated with.
1098	*/
1099	static void gvmmR0InitPerVMData(PGVM pGVM, int16_t hSelf, VMCPUID cCpus, PSUPDRVSESSION pSession)
1100	{
1101	AssertCompile(RT_SIZEOFMEMB(GVM,gvmm.s) <= RT_SIZEOFMEMB(GVM,gvmm.padding));
1102	AssertCompile(RT_SIZEOFMEMB(GVMCPU,gvmm.s) <= RT_SIZEOFMEMB(GVMCPU,gvmm.padding));
1103	AssertCompileMemberAlignment(VM, cpum, 64);
1104	AssertCompileMemberAlignment(VM, tm, 64);
1105
1106	/* GVM: */
1107	pGVM->u32Magic = GVM_MAGIC;
1108	pGVM->hSelf = hSelf;
1109	pGVM->cCpus = cCpus;
1110	pGVM->pSession = pSession;
1111	pGVM->pSelf = pGVM;
1112
1113	/* VM: */
1114	pGVM->enmVMState = VMSTATE_CREATING;
1115	pGVM->hSelfUnsafe = hSelf;
1116	pGVM->pSessionUnsafe = pSession;
1117	pGVM->pVMR0ForCall = pGVM;
1118	pGVM->cCpusUnsafe = cCpus;
1119	pGVM->uCpuExecutionCap = 100; /* default is no cap. */
1120	pGVM->uStructVersion = 1;
1121	pGVM->cbSelf = sizeof(VM);
1122	pGVM->cbVCpu = sizeof(VMCPU);
1123
1124	/* GVMM: */
1125	pGVM->gvmm.s.VMMemObj = NIL_RTR0MEMOBJ;
1126	pGVM->gvmm.s.VMMapObj = NIL_RTR0MEMOBJ;
1127	pGVM->gvmm.s.VMPagesMemObj = NIL_RTR0MEMOBJ;
1128	pGVM->gvmm.s.VMPagesMapObj = NIL_RTR0MEMOBJ;
1129	pGVM->gvmm.s.fDoneVMMR0Init = false;
1130	pGVM->gvmm.s.fDoneVMMR0Term = false;
1131
1132	for (size_t i = 0; i < RT_ELEMENTS(pGVM->gvmm.s.aWorkerThreads); i++)
1133	{
1134	pGVM->gvmm.s.aWorkerThreads[i].hNativeThread = NIL_RTNATIVETHREAD;
1135	pGVM->gvmm.s.aWorkerThreads[i].hNativeThreadR3 = NIL_RTNATIVETHREAD;
1136	}
1137	pGVM->gvmm.s.aWorkerThreads[0].hNativeThread = GVMM_RTNATIVETHREAD_DESTROYED; /* invalid entry */
1138
1139	for (size_t i = 0; i < RT_ELEMENTS(pGVM->gvmm.s.aEmtHash); i++)
1140	{
1141	pGVM->gvmm.s.aEmtHash[i].hNativeEmt = NIL_RTNATIVETHREAD;
1142	pGVM->gvmm.s.aEmtHash[i].idVCpu = NIL_VMCPUID;
1143	}
1144
1145	/*
1146	* Per virtual CPU.
1147	*/
1148	for (VMCPUID i = 0; i < pGVM->cCpus; i++)
1149	{
1150	pGVM->aCpus[i].idCpu = i;
1151	pGVM->aCpus[i].idCpuUnsafe = i;
1152	pGVM->aCpus[i].gvmm.s.HaltEventMulti = NIL_RTSEMEVENTMULTI;
1153	pGVM->aCpus[i].gvmm.s.VMCpuMapObj = NIL_RTR0MEMOBJ;
1154	pGVM->aCpus[i].gvmm.s.idxEmtHash = UINT16_MAX;
1155	pGVM->aCpus[i].gvmm.s.hHrWakeUpTimer = NULL;
1156	pGVM->aCpus[i].hEMT = NIL_RTNATIVETHREAD;
1157	pGVM->aCpus[i].pGVM = pGVM;
1158	pGVM->aCpus[i].idHostCpu = NIL_RTCPUID;
1159	pGVM->aCpus[i].iHostCpuSet = UINT32_MAX;
1160	pGVM->aCpus[i].hNativeThread = NIL_RTNATIVETHREAD;
1161	pGVM->aCpus[i].hNativeThreadR0 = NIL_RTNATIVETHREAD;
1162	pGVM->aCpus[i].enmState = VMCPUSTATE_STOPPED;
1163	pGVM->aCpus[i].pVCpuR0ForVtg = &pGVM->aCpus[i];
1164	}
1165	}
1166
1167
1168	/**
1169	* Does the VM initialization.
1170	*
1171	* @returns VBox status code.
1172	* @param pGVM The global (ring-0) VM structure.
1173	*/
1174	GVMMR0DECL(int) GVMMR0InitVM(PGVM pGVM)
1175	{
1176	LogFlow(("GVMMR0InitVM: pGVM=%p\n", pGVM));
1177
1178	int rc = VERR_INTERNAL_ERROR_3;
1179	if ( !pGVM->gvmm.s.fDoneVMMR0Init
1180	&& pGVM->aCpus[0].gvmm.s.HaltEventMulti == NIL_RTSEMEVENTMULTI)
1181	{
1182	for (VMCPUID i = 0; i < pGVM->cCpus; i++)
1183	{
1184	rc = RTSemEventMultiCreate(&pGVM->aCpus[i].gvmm.s.HaltEventMulti);
1185	if (RT_FAILURE(rc))
1186	{
1187	pGVM->aCpus[i].gvmm.s.HaltEventMulti = NIL_RTSEMEVENTMULTI;
1188	break;
1189	}
1190	}
1191	}
1192	else
1193	rc = VERR_WRONG_ORDER;
1194
1195	LogFlow(("GVMMR0InitVM: returns %Rrc\n", rc));
1196	return rc;
1197	}
1198
1199
1200	/**
1201	* Indicates that we're done with the ring-0 initialization
1202	* of the VM.
1203	*
1204	* @param pGVM The global (ring-0) VM structure.
1205	* @thread EMT(0)
1206	*/
1207	GVMMR0DECL(void) GVMMR0DoneInitVM(PGVM pGVM)
1208	{
1209	/* Set the indicator. */
1210	pGVM->gvmm.s.fDoneVMMR0Init = true;
1211	}
1212
1213
1214	/**
1215	* Indicates that we're doing the ring-0 termination of the VM.
1216	*
1217	* @returns true if termination hasn't been done already, false if it has.
1218	* @param pGVM Pointer to the global VM structure. Optional.
1219	* @thread EMT(0) or session cleanup thread.
1220	*/
1221	GVMMR0DECL(bool) GVMMR0DoingTermVM(PGVM pGVM)
1222	{
1223	/* Validate the VM structure, state and handle. */
1224	AssertPtrReturn(pGVM, false);
1225
1226	/* Set the indicator. */
1227	if (pGVM->gvmm.s.fDoneVMMR0Term)
1228	return false;
1229	pGVM->gvmm.s.fDoneVMMR0Term = true;
1230	return true;
1231	}
1232
1233
1234	/**
1235	* Destroys the VM, freeing all associated resources (the ring-0 ones anyway).
1236	*
1237	* This is call from the vmR3DestroyFinalBit and from a error path in VMR3Create,
1238	* and the caller is not the EMT thread, unfortunately. For security reasons, it
1239	* would've been nice if the caller was actually the EMT thread or that we somehow
1240	* could've associated the calling thread with the VM up front.
1241	*
1242	* @returns VBox status code.
1243	* @param pGVM The global (ring-0) VM structure.
1244	*
1245	* @thread EMT(0) if it's associated with the VM, otherwise any thread.
1246	*/
1247	GVMMR0DECL(int) GVMMR0DestroyVM(PGVM pGVM)
1248	{
1249	LogFlow(("GVMMR0DestroyVM: pGVM=%p\n", pGVM));
1250	PGVMM pGVMM;
1251	GVMM_GET_VALID_INSTANCE(pGVMM, VERR_GVMM_INSTANCE);
1252
1253	/*
1254	* Validate the VM structure, state and caller.
1255	*/
1256	AssertPtrReturn(pGVM, VERR_INVALID_POINTER);
1257	AssertReturn(!((uintptr_t)pGVM & HOST_PAGE_OFFSET_MASK), VERR_INVALID_POINTER);
1258	AssertMsgReturn(pGVM->enmVMState >= VMSTATE_CREATING && pGVM->enmVMState <= VMSTATE_TERMINATED, ("%d\n", pGVM->enmVMState),
1259	VERR_WRONG_ORDER);
1260
1261	uint32_t hGVM = pGVM->hSelf;
1262	ASMCompilerBarrier();
1263	AssertReturn(hGVM != NIL_GVM_HANDLE, VERR_INVALID_VM_HANDLE);
1264	AssertReturn(hGVM < RT_ELEMENTS(pGVMM->aHandles), VERR_INVALID_VM_HANDLE);
1265
1266	PGVMHANDLE pHandle = &pGVMM->aHandles[hGVM];
1267	AssertReturn(pHandle->pGVM == pGVM, VERR_NOT_OWNER);
1268
1269	RTPROCESS ProcId = RTProcSelf();
1270	RTNATIVETHREAD hSelf = RTThreadNativeSelf();
1271	AssertReturn( ( pHandle->hEMT0 == hSelf
1272	&& pHandle->ProcId == ProcId)
1273	\|\| pHandle->hEMT0 == NIL_RTNATIVETHREAD, VERR_NOT_OWNER);
1274
1275	/*
1276	* Lookup the handle and destroy the object.
1277	* Since the lock isn't recursive and we'll have to leave it before dereferencing the
1278	* object, we take some precautions against racing callers just in case...
1279	*/
1280	int rc = gvmmR0CreateDestroyLock(pGVMM);
1281	AssertRC(rc);
1282
1283	/* Be careful here because we might theoretically be racing someone else cleaning up. */
1284	if ( pHandle->pGVM == pGVM
1285	&& ( ( pHandle->hEMT0 == hSelf
1286	&& pHandle->ProcId == ProcId)
1287	\|\| pHandle->hEMT0 == NIL_RTNATIVETHREAD)
1288	&& RT_VALID_PTR(pHandle->pvObj)
1289	&& RT_VALID_PTR(pHandle->pSession)
1290	&& RT_VALID_PTR(pHandle->pGVM)
1291	&& pHandle->pGVM->u32Magic == GVM_MAGIC)
1292	{
1293	/* Check that other EMTs have deregistered. */
1294	uint32_t cNotDeregistered = 0;
1295	for (VMCPUID idCpu = 1; idCpu < pGVM->cCpus; idCpu++)
1296	cNotDeregistered += pGVM->aCpus[idCpu].hEMT != GVMM_RTNATIVETHREAD_DESTROYED;
1297	if (cNotDeregistered == 0)
1298	{
1299	/* Grab the object pointer. */
1300	void *pvObj = pHandle->pvObj;
1301	pHandle->pvObj = NULL;
1302	gvmmR0CreateDestroyUnlock(pGVMM);
1303
1304	SUPR0ObjRelease(pvObj, pHandle->pSession);
1305	}
1306	else
1307	{
1308	gvmmR0CreateDestroyUnlock(pGVMM);
1309	rc = VERR_GVMM_NOT_ALL_EMTS_DEREGISTERED;
1310	}
1311	}
1312	else
1313	{
1314	SUPR0Printf("GVMMR0DestroyVM: pHandle=%RKv:{.pGVM=%p, .hEMT0=%p, .ProcId=%u, .pvObj=%p} pGVM=%p hSelf=%p\n",
1315	pHandle, pHandle->pGVM, pHandle->hEMT0, pHandle->ProcId, pHandle->pvObj, pGVM, hSelf);
1316	gvmmR0CreateDestroyUnlock(pGVMM);
1317	rc = VERR_GVMM_IPE_2;
1318	}
1319
1320	return rc;
1321	}
1322
1323
1324	/**
1325	* Performs VM cleanup task as part of object destruction.
1326	*
1327	* @param pGVM The GVM pointer.
1328	*/
1329	static void gvmmR0CleanupVM(PGVM pGVM)
1330	{
1331	if ( pGVM->gvmm.s.fDoneVMMR0Init
1332	&& !pGVM->gvmm.s.fDoneVMMR0Term)
1333	{
1334	if ( pGVM->gvmm.s.VMMemObj != NIL_RTR0MEMOBJ
1335	&& RTR0MemObjAddress(pGVM->gvmm.s.VMMemObj) == pGVM)
1336	{
1337	LogFlow(("gvmmR0CleanupVM: Calling VMMR0TermVM\n"));
1338	VMMR0TermVM(pGVM, NIL_VMCPUID);
1339	}
1340	else
1341	AssertMsgFailed(("gvmmR0CleanupVM: VMMemObj=%p pGVM=%p\n", pGVM->gvmm.s.VMMemObj, pGVM));
1342	}
1343
1344	GMMR0CleanupVM(pGVM);
1345	#ifdef VBOX_WITH_NEM_R0
1346	NEMR0CleanupVM(pGVM);
1347	#endif
1348	PDMR0CleanupVM(pGVM);
1349	IOMR0CleanupVM(pGVM);
1350	DBGFR0CleanupVM(pGVM);
1351	PGMR0CleanupVM(pGVM);
1352	TMR0CleanupVM(pGVM);
1353	VMMR0CleanupVM(pGVM);
1354	}
1355
1356
1357	/**
1358	* @callback_method_impl{FNSUPDRVDESTRUCTOR,VM handle destructor}
1359	*
1360	* pvUser1 is the GVM instance pointer.
1361	* pvUser2 is the handle pointer.
1362	*/
1363	static DECLCALLBACK(void) gvmmR0HandleObjDestructor(void pvObj, void pvUser1, void *pvUser2)
1364	{
1365	LogFlow(("gvmmR0HandleObjDestructor: %p %p %p\n", pvObj, pvUser1, pvUser2));
1366
1367	NOREF(pvObj);
1368
1369	/*
1370	* Some quick, paranoid, input validation.
1371	*/
1372	PGVMHANDLE pHandle = (PGVMHANDLE)pvUser2;
1373	AssertPtr(pHandle);
1374	PGVMM pGVMM = (PGVMM)pvUser1;
1375	Assert(pGVMM == g_pGVMM);
1376	const uint16_t iHandle = pHandle - &pGVMM->aHandles[0];
1377	if ( !iHandle
1378	\|\| iHandle >= RT_ELEMENTS(pGVMM->aHandles)
1379	\|\| iHandle != pHandle->iSelf)
1380	{
1381	SUPR0Printf("GVM: handle %d is out of range or corrupt (iSelf=%d)!\n", iHandle, pHandle->iSelf);
1382	return;
1383	}
1384
1385	int rc = gvmmR0CreateDestroyLock(pGVMM);
1386	AssertRC(rc);
1387	rc = GVMMR0_USED_EXCLUSIVE_LOCK(pGVMM);
1388	AssertRC(rc);
1389
1390	/*
1391	* This is a tad slow but a doubly linked list is too much hassle.
1392	*/
1393	if (RT_UNLIKELY(pHandle->iNext >= RT_ELEMENTS(pGVMM->aHandles)))
1394	{
1395	SUPR0Printf("GVM: used list index %d is out of range!\n", pHandle->iNext);
1396	GVMMR0_USED_EXCLUSIVE_UNLOCK(pGVMM);
1397	gvmmR0CreateDestroyUnlock(pGVMM);
1398	return;
1399	}
1400
1401	if (pGVMM->iUsedHead == iHandle)
1402	pGVMM->iUsedHead = pHandle->iNext;
1403	else
1404	{
1405	uint16_t iPrev = pGVMM->iUsedHead;
1406	int c = RT_ELEMENTS(pGVMM->aHandles) + 2;
1407	while (iPrev)
1408	{
1409	if (RT_UNLIKELY(iPrev >= RT_ELEMENTS(pGVMM->aHandles)))
1410	{
1411	SUPR0Printf("GVM: used list index %d is out of range!\n", iPrev);
1412	GVMMR0_USED_EXCLUSIVE_UNLOCK(pGVMM);
1413	gvmmR0CreateDestroyUnlock(pGVMM);
1414	return;
1415	}
1416	if (RT_UNLIKELY(c-- <= 0))
1417	{
1418	iPrev = 0;
1419	break;
1420	}
1421
1422	if (pGVMM->aHandles[iPrev].iNext == iHandle)
1423	break;
1424	iPrev = pGVMM->aHandles[iPrev].iNext;
1425	}
1426	if (!iPrev)
1427	{
1428	SUPR0Printf("GVM: can't find the handle previous previous of %d!\n", pHandle->iSelf);
1429	GVMMR0_USED_EXCLUSIVE_UNLOCK(pGVMM);
1430	gvmmR0CreateDestroyUnlock(pGVMM);
1431	return;
1432	}
1433
1434	Assert(pGVMM->aHandles[iPrev].iNext == iHandle);
1435	pGVMM->aHandles[iPrev].iNext = pHandle->iNext;
1436	}
1437	pHandle->iNext = 0;
1438	pGVMM->cVMs--;
1439
1440	/*
1441	* Do the global cleanup round.
1442	*/
1443	PGVM pGVM = pHandle->pGVM;
1444	if ( RT_VALID_PTR(pGVM)
1445	&& pGVM->u32Magic == GVM_MAGIC)
1446	{
1447	pGVMM->cEMTs -= pGVM->cCpus;
1448
1449	if (pGVM->pSession)
1450	SUPR0SetSessionVM(pGVM->pSession, NULL, NULL);
1451
1452	GVMMR0_USED_EXCLUSIVE_UNLOCK(pGVMM);
1453
1454	gvmmR0CleanupVM(pGVM);
1455
1456	/*
1457	* Do the GVMM cleanup - must be done last.
1458	*/
1459	/* The VM and VM pages mappings/allocations. */
1460	if (pGVM->gvmm.s.VMPagesMapObj != NIL_RTR0MEMOBJ)
1461	{
1462	rc = RTR0MemObjFree(pGVM->gvmm.s.VMPagesMapObj, false /* fFreeMappings */); AssertRC(rc);
1463	pGVM->gvmm.s.VMPagesMapObj = NIL_RTR0MEMOBJ;
1464	}
1465
1466	if (pGVM->gvmm.s.VMMapObj != NIL_RTR0MEMOBJ)
1467	{
1468	rc = RTR0MemObjFree(pGVM->gvmm.s.VMMapObj, false /* fFreeMappings */); AssertRC(rc);
1469	pGVM->gvmm.s.VMMapObj = NIL_RTR0MEMOBJ;
1470	}
1471
1472	if (pGVM->gvmm.s.VMPagesMemObj != NIL_RTR0MEMOBJ)
1473	{
1474	rc = RTR0MemObjFree(pGVM->gvmm.s.VMPagesMemObj, false /* fFreeMappings */); AssertRC(rc);
1475	pGVM->gvmm.s.VMPagesMemObj = NIL_RTR0MEMOBJ;
1476	}
1477
1478	for (VMCPUID i = 0; i < pGVM->cCpus; i++)
1479	{
1480	if (pGVM->aCpus[i].gvmm.s.HaltEventMulti != NIL_RTSEMEVENTMULTI)
1481	{
1482	rc = RTSemEventMultiDestroy(pGVM->aCpus[i].gvmm.s.HaltEventMulti); AssertRC(rc);
1483	pGVM->aCpus[i].gvmm.s.HaltEventMulti = NIL_RTSEMEVENTMULTI;
1484	}
1485	if (pGVM->aCpus[i].gvmm.s.VMCpuMapObj != NIL_RTR0MEMOBJ)
1486	{
1487	rc = RTR0MemObjFree(pGVM->aCpus[i].gvmm.s.VMCpuMapObj, false /* fFreeMappings */); AssertRC(rc);
1488	pGVM->aCpus[i].gvmm.s.VMCpuMapObj = NIL_RTR0MEMOBJ;
1489	}
1490	#ifdef GVMM_SCHED_WITH_HR_WAKE_UP_TIMER
1491	if (pGVM->aCpus[i].gvmm.s.hHrWakeUpTimer != NULL)
1492	{
1493	RTTimerDestroy(pGVM->aCpus[i].gvmm.s.hHrWakeUpTimer);
1494	pGVM->aCpus[i].gvmm.s.hHrWakeUpTimer = NULL;
1495	}
1496	#endif
1497	}
1498
1499	/* the GVM structure itself. */
1500	pGVM->u32Magic \|= UINT32_C(0x80000000);
1501	Assert(pGVM->gvmm.s.VMMemObj != NIL_RTR0MEMOBJ);
1502	rc = RTR0MemObjFree(pGVM->gvmm.s.VMMemObj, true /fFreeMappings/); AssertRC(rc);
1503	pGVM = NULL;
1504
1505	/* Re-acquire the UsedLock before freeing the handle since we're updating handle fields. */
1506	rc = GVMMR0_USED_EXCLUSIVE_LOCK(pGVMM);
1507	AssertRC(rc);
1508	}
1509	/* else: GVMMR0CreateVM cleanup. */
1510
1511	/*
1512	* Free the handle.
1513	*/
1514	pHandle->iNext = pGVMM->iFreeHead;
1515	pGVMM->iFreeHead = iHandle;
1516	ASMAtomicWriteNullPtr(&pHandle->pGVM);
1517	ASMAtomicWriteNullPtr(&pHandle->pvObj);
1518	ASMAtomicWriteNullPtr(&pHandle->pSession);
1519	ASMAtomicWriteHandle(&pHandle->hEMT0, NIL_RTNATIVETHREAD);
1520	ASMAtomicWriteU32(&pHandle->ProcId, NIL_RTPROCESS);
1521
1522	GVMMR0_USED_EXCLUSIVE_UNLOCK(pGVMM);
1523	gvmmR0CreateDestroyUnlock(pGVMM);
1524	LogFlow(("gvmmR0HandleObjDestructor: returns\n"));
1525	}
1526
1527
1528	/**
1529	* Registers the calling thread as the EMT of a Virtual CPU.
1530	*
1531	* Note that VCPU 0 is automatically registered during VM creation.
1532	*
1533	* @returns VBox status code
1534	* @param pGVM The global (ring-0) VM structure.
1535	* @param idCpu VCPU id to register the current thread as.
1536	*/
1537	GVMMR0DECL(int) GVMMR0RegisterVCpu(PGVM pGVM, VMCPUID idCpu)
1538	{
1539	AssertReturn(idCpu != 0, VERR_INVALID_FUNCTION);
1540
1541	/*
1542	* Validate the VM structure, state and handle.
1543	*/
1544	PGVMM pGVMM;
1545	int rc = gvmmR0ByGVM(pGVM, &pGVMM, false /* fTakeUsedLock */);
1546	if (RT_SUCCESS(rc))
1547	{
1548	if (idCpu < pGVM->cCpus)
1549	{
1550	PGVMCPU const pGVCpu = &pGVM->aCpus[idCpu];
1551	RTNATIVETHREAD const hNativeSelf = RTThreadNativeSelf();
1552
1553	gvmmR0CreateDestroyLock(pGVMM); /** @todo per-VM lock? */
1554
1555	/* Check that the EMT isn't already assigned to a thread. */
1556	if (pGVCpu->hEMT == NIL_RTNATIVETHREAD)
1557	{
1558	Assert(pGVCpu->hNativeThreadR0 == NIL_RTNATIVETHREAD);
1559
1560	/* A thread may only be one EMT (this makes sure hNativeSelf isn't NIL). */
1561	for (VMCPUID iCpu = 0; iCpu < pGVM->cCpus; iCpu++)
1562	AssertBreakStmt(pGVM->aCpus[iCpu].hEMT != hNativeSelf, rc = VERR_INVALID_PARAMETER);
1563	if (RT_SUCCESS(rc))
1564	{
1565	/*
1566	* Do the assignment, then try setup the hook. Undo if that fails.
1567	*/
1568	unsigned cCollisions = 0;
1569	uint32_t idxHash = GVMM_EMT_HASH_1(hNativeSelf);
1570	if (pGVM->gvmm.s.aEmtHash[idxHash].hNativeEmt != NIL_RTNATIVETHREAD)
1571	{
1572	uint32_t const idxHash2 = GVMM_EMT_HASH_2(hNativeSelf);
1573	do
1574	{
1575	cCollisions++;
1576	Assert(cCollisions < GVMM_EMT_HASH_SIZE);
1577	idxHash = (idxHash + idxHash2) % GVMM_EMT_HASH_SIZE;
1578	} while (pGVM->gvmm.s.aEmtHash[idxHash].hNativeEmt != NIL_RTNATIVETHREAD);
1579	}
1580	pGVM->gvmm.s.aEmtHash[idxHash].hNativeEmt = hNativeSelf;
1581	pGVM->gvmm.s.aEmtHash[idxHash].idVCpu = idCpu;
1582
1583	pGVCpu->hNativeThreadR0 = hNativeSelf;
1584	pGVCpu->hEMT = hNativeSelf;
1585	pGVCpu->cEmtHashCollisions = (uint8_t)cCollisions;
1586	pGVCpu->gvmm.s.idxEmtHash = (uint16_t)idxHash;
1587
1588	rc = VMMR0ThreadCtxHookCreateForEmt(pGVCpu);
1589	if (RT_SUCCESS(rc))
1590	{
1591	CPUMR0RegisterVCpuThread(pGVCpu);
1592
1593	#ifdef GVMM_SCHED_WITH_HR_WAKE_UP_TIMER
1594	/*
1595	* Create the high resolution wake-up timer, ignore failures.
1596	*/
1597	if (RTTimerCanDoHighResolution())
1598	{
1599	int rc2 = RTTimerCreateEx(&pGVCpu->gvmm.s.hHrWakeUpTimer, 0 /one-shot, no interval/,
1600	RTTIMER_FLAGS_HIGH_RES, gvmmR0EmtWakeUpTimerCallback, pGVCpu);
1601	if (RT_FAILURE(rc2))
1602	pGVCpu->gvmm.s.hHrWakeUpTimer = NULL;
1603	}
1604	#endif
1605	}
1606	else
1607	{
1608	pGVCpu->hNativeThreadR0 = NIL_RTNATIVETHREAD;
1609	pGVCpu->hEMT = NIL_RTNATIVETHREAD;
1610	pGVM->gvmm.s.aEmtHash[idxHash].hNativeEmt = NIL_RTNATIVETHREAD;
1611	pGVM->gvmm.s.aEmtHash[idxHash].idVCpu = NIL_VMCPUID;
1612	pGVCpu->gvmm.s.idxEmtHash = UINT16_MAX;
1613	}
1614	}
1615	}
1616	else
1617	rc = VERR_ACCESS_DENIED;
1618
1619	gvmmR0CreateDestroyUnlock(pGVMM);
1620	}
1621	else
1622	rc = VERR_INVALID_CPU_ID;
1623	}
1624	return rc;
1625	}
1626
1627
1628	/**
1629	* Deregisters the calling thread as the EMT of a Virtual CPU.
1630	*
1631	* Note that VCPU 0 shall call GVMMR0DestroyVM intead of this API.
1632	*
1633	* @returns VBox status code
1634	* @param pGVM The global (ring-0) VM structure.
1635	* @param idCpu VCPU id to register the current thread as.
1636	*/
1637	GVMMR0DECL(int) GVMMR0DeregisterVCpu(PGVM pGVM, VMCPUID idCpu)
1638	{
1639	AssertReturn(idCpu != 0, VERR_INVALID_FUNCTION);
1640
1641	/*
1642	* Validate the VM structure, state and handle.
1643	*/
1644	PGVMM pGVMM;
1645	int rc = gvmmR0ByGVMandEMT(pGVM, idCpu, &pGVMM);
1646	if (RT_SUCCESS(rc))
1647	{
1648	/*
1649	* Take the destruction lock and recheck the handle state to
1650	* prevent racing GVMMR0DestroyVM.
1651	*/
1652	gvmmR0CreateDestroyLock(pGVMM);
1653
1654	uint32_t hSelf = pGVM->hSelf;
1655	ASMCompilerBarrier();
1656	if ( hSelf < RT_ELEMENTS(pGVMM->aHandles)
1657	&& pGVMM->aHandles[hSelf].pvObj != NULL
1658	&& pGVMM->aHandles[hSelf].pGVM == pGVM)
1659	{
1660	/*
1661	* Do per-EMT cleanups.
1662	*/
1663	VMMR0ThreadCtxHookDestroyForEmt(&pGVM->aCpus[idCpu]);
1664
1665	/*
1666	* Invalidate hEMT. We don't use NIL here as that would allow
1667	* GVMMR0RegisterVCpu to be called again, and we don't want that.
1668	*/
1669	pGVM->aCpus[idCpu].hEMT = GVMM_RTNATIVETHREAD_DESTROYED;
1670	pGVM->aCpus[idCpu].hNativeThreadR0 = NIL_RTNATIVETHREAD;
1671
1672	uint32_t const idxHash = pGVM->aCpus[idCpu].gvmm.s.idxEmtHash;
1673	if (idxHash < RT_ELEMENTS(pGVM->gvmm.s.aEmtHash))
1674	pGVM->gvmm.s.aEmtHash[idxHash].hNativeEmt = GVMM_RTNATIVETHREAD_DESTROYED;
1675	}
1676
1677	gvmmR0CreateDestroyUnlock(pGVMM);
1678	}
1679	return rc;
1680	}
1681
1682
1683	/**
1684	* Registers the caller as a given worker thread.
1685	*
1686	* This enables the thread to operate critical sections in ring-0.
1687	*
1688	* @returns VBox status code.
1689	* @param pGVM The global (ring-0) VM structure.
1690	* @param enmWorker The worker thread this is supposed to be.
1691	* @param hNativeSelfR3 The ring-3 native self of the caller.
1692	*/
1693	GVMMR0DECL(int) GVMMR0RegisterWorkerThread(PGVM pGVM, GVMMWORKERTHREAD enmWorker, RTNATIVETHREAD hNativeSelfR3)
1694	{
1695	/*
1696	* Validate input.
1697	*/
1698	AssertReturn(enmWorker > GVMMWORKERTHREAD_INVALID && enmWorker < GVMMWORKERTHREAD_END, VERR_INVALID_PARAMETER);
1699	AssertReturn(hNativeSelfR3 != NIL_RTNATIVETHREAD, VERR_INVALID_HANDLE);
1700	RTNATIVETHREAD const hNativeSelf = RTThreadNativeSelf();
1701	AssertReturn(hNativeSelf != NIL_RTNATIVETHREAD, VERR_INTERNAL_ERROR_3);
1702	PGVMM pGVMM;
1703	int rc = gvmmR0ByGVM(pGVM, &pGVMM, false /fTakeUsedLock/);
1704	AssertRCReturn(rc, rc);
1705	AssertReturn(pGVM->enmVMState < VMSTATE_DESTROYING, VERR_VM_INVALID_VM_STATE);
1706
1707	/*
1708	* Grab the big lock and check the VM state again.
1709	*/
1710	uint32_t const hSelf = pGVM->hSelf;
1711	gvmmR0CreateDestroyLock(pGVMM); /** @todo per-VM lock? */
1712	if ( hSelf < RT_ELEMENTS(pGVMM->aHandles)
1713	&& pGVMM->aHandles[hSelf].pvObj != NULL
1714	&& pGVMM->aHandles[hSelf].pGVM == pGVM
1715	&& pGVMM->aHandles[hSelf].ProcId == RTProcSelf())
1716	{
1717	if (pGVM->enmVMState < VMSTATE_DESTROYING)
1718	{
1719	/*
1720	* Check that the thread isn't an EMT or serving in some other worker capacity.
1721	*/
1722	for (VMCPUID iCpu = 0; iCpu < pGVM->cCpus; iCpu++)
1723	AssertBreakStmt(pGVM->aCpus[iCpu].hEMT != hNativeSelf, rc = VERR_INVALID_PARAMETER);
1724	for (size_t idx = 0; idx < RT_ELEMENTS(pGVM->gvmm.s.aWorkerThreads); idx++)
1725	AssertBreakStmt(idx == (size_t)enmWorker \|\| pGVM->gvmm.s.aWorkerThreads[enmWorker].hNativeThread != hNativeSelf,
1726	rc = VERR_INVALID_PARAMETER);
1727	if (RT_SUCCESS(rc))
1728	{
1729	/*
1730	* Do the registration.
1731	*/
1732	if ( pGVM->gvmm.s.aWorkerThreads[enmWorker].hNativeThread == NIL_RTNATIVETHREAD
1733	&& pGVM->gvmm.s.aWorkerThreads[enmWorker].hNativeThreadR3 == NIL_RTNATIVETHREAD)
1734	{
1735	pGVM->gvmm.s.aWorkerThreads[enmWorker].hNativeThread = hNativeSelf;
1736	pGVM->gvmm.s.aWorkerThreads[enmWorker].hNativeThreadR3 = hNativeSelfR3;
1737	rc = VINF_SUCCESS;
1738	}
1739	else if ( pGVM->gvmm.s.aWorkerThreads[enmWorker].hNativeThread == hNativeSelf
1740	&& pGVM->gvmm.s.aWorkerThreads[enmWorker].hNativeThreadR3 == hNativeSelfR3)
1741	rc = VERR_ALREADY_EXISTS;
1742	else
1743	rc = VERR_RESOURCE_BUSY;
1744	}
1745	}
1746	else
1747	rc = VERR_VM_INVALID_VM_STATE;
1748	}
1749	else
1750	rc = VERR_INVALID_VM_HANDLE;
1751	gvmmR0CreateDestroyUnlock(pGVMM);
1752	return rc;
1753	}
1754
1755
1756	/**
1757	* Deregisters a workinger thread (caller).
1758	*
1759	* The worker thread cannot be re-created and re-registered, instead the given
1760	* @a enmWorker slot becomes invalid.
1761	*
1762	* @returns VBox status code.
1763	* @param pGVM The global (ring-0) VM structure.
1764	* @param enmWorker The worker thread this is supposed to be.
1765	*/
1766	GVMMR0DECL(int) GVMMR0DeregisterWorkerThread(PGVM pGVM, GVMMWORKERTHREAD enmWorker)
1767	{
1768	/*
1769	* Validate input.
1770	*/
1771	AssertReturn(enmWorker > GVMMWORKERTHREAD_INVALID && enmWorker < GVMMWORKERTHREAD_END, VERR_INVALID_PARAMETER);
1772	RTNATIVETHREAD const hNativeThread = RTThreadNativeSelf();
1773	AssertReturn(hNativeThread != NIL_RTNATIVETHREAD, VERR_INTERNAL_ERROR_3);
1774	PGVMM pGVMM;
1775	int rc = gvmmR0ByGVM(pGVM, &pGVMM, false /fTakeUsedLock/);
1776	AssertRCReturn(rc, rc);
1777
1778	/*
1779	* Grab the big lock and check the VM state again.
1780	*/
1781	uint32_t const hSelf = pGVM->hSelf;
1782	gvmmR0CreateDestroyLock(pGVMM); /** @todo per-VM lock? */
1783	if ( hSelf < RT_ELEMENTS(pGVMM->aHandles)
1784	&& pGVMM->aHandles[hSelf].pvObj != NULL
1785	&& pGVMM->aHandles[hSelf].pGVM == pGVM
1786	&& pGVMM->aHandles[hSelf].ProcId == RTProcSelf())
1787	{
1788	/*
1789	* Do the deregistration.
1790	* This will prevent any other threads register as the worker later.
1791	*/
1792	if (pGVM->gvmm.s.aWorkerThreads[enmWorker].hNativeThread == hNativeThread)
1793	{
1794	pGVM->gvmm.s.aWorkerThreads[enmWorker].hNativeThread = GVMM_RTNATIVETHREAD_DESTROYED;
1795	pGVM->gvmm.s.aWorkerThreads[enmWorker].hNativeThreadR3 = GVMM_RTNATIVETHREAD_DESTROYED;
1796	rc = VINF_SUCCESS;
1797	}
1798	else if ( pGVM->gvmm.s.aWorkerThreads[enmWorker].hNativeThread == GVMM_RTNATIVETHREAD_DESTROYED
1799	&& pGVM->gvmm.s.aWorkerThreads[enmWorker].hNativeThreadR3 == GVMM_RTNATIVETHREAD_DESTROYED)
1800	rc = VINF_SUCCESS;
1801	else
1802	rc = VERR_NOT_OWNER;
1803	}
1804	else
1805	rc = VERR_INVALID_VM_HANDLE;
1806	gvmmR0CreateDestroyUnlock(pGVMM);
1807	return rc;
1808	}
1809
1810
1811	/**
1812	* Lookup a GVM structure by its handle.
1813	*
1814	* @returns The GVM pointer on success, NULL on failure.
1815	* @param hGVM The global VM handle. Asserts on bad handle.
1816	*/
1817	GVMMR0DECL(PGVM) GVMMR0ByHandle(uint32_t hGVM)
1818	{
1819	PGVMM pGVMM;
1820	GVMM_GET_VALID_INSTANCE(pGVMM, NULL);
1821
1822	/*
1823	* Validate.
1824	*/
1825	AssertReturn(hGVM != NIL_GVM_HANDLE, NULL);
1826	AssertReturn(hGVM < RT_ELEMENTS(pGVMM->aHandles), NULL);
1827
1828	/*
1829	* Look it up.
1830	*/
1831	PGVMHANDLE pHandle = &pGVMM->aHandles[hGVM];
1832	AssertPtrReturn(pHandle->pvObj, NULL);
1833	PGVM pGVM = pHandle->pGVM;
1834	AssertPtrReturn(pGVM, NULL);
1835
1836	return pGVM;
1837	}
1838
1839
1840	/**
1841	* Check that the given GVM and VM structures match up.
1842	*
1843	* The calling thread must be in the same process as the VM. All current lookups
1844	* are by threads inside the same process, so this will not be an issue.
1845	*
1846	* @returns VBox status code.
1847	* @param pGVM The global (ring-0) VM structure.
1848	* @param ppGVMM Where to store the pointer to the GVMM instance data.
1849	* @param fTakeUsedLock Whether to take the used lock or not. We take it in
1850	* shared mode when requested.
1851	*
1852	* Be very careful if not taking the lock as it's
1853	* possible that the VM will disappear then!
1854	*
1855	* @remark This will not assert on an invalid pGVM but try return silently.
1856	*/
1857	static int gvmmR0ByGVM(PGVM pGVM, PGVMM *ppGVMM, bool fTakeUsedLock)
1858	{
1859	/*
1860	* Check the pointers.
1861	*/
1862	int rc;
1863	if (RT_LIKELY( RT_VALID_PTR(pGVM)
1864	&& ((uintptr_t)pGVM & HOST_PAGE_OFFSET_MASK) == 0 ))
1865	{
1866	/*
1867	* Get the pGVMM instance and check the VM handle.
1868	*/
1869	PGVMM pGVMM;
1870	GVMM_GET_VALID_INSTANCE(pGVMM, VERR_GVMM_INSTANCE);
1871
1872	uint16_t hGVM = pGVM->hSelf;
1873	if (RT_LIKELY( hGVM != NIL_GVM_HANDLE
1874	&& hGVM < RT_ELEMENTS(pGVMM->aHandles)))
1875	{
1876	RTPROCESS const pidSelf = RTProcSelf();
1877	PGVMHANDLE pHandle = &pGVMM->aHandles[hGVM];
1878	if (fTakeUsedLock)
1879	{
1880	rc = GVMMR0_USED_SHARED_LOCK(pGVMM);
1881	AssertRCReturn(rc, rc);
1882	}
1883
1884	if (RT_LIKELY( pHandle->pGVM == pGVM
1885	&& pHandle->ProcId == pidSelf
1886	&& RT_VALID_PTR(pHandle->pvObj)))
1887	{
1888	/*
1889	* Some more VM data consistency checks.
1890	*/
1891	if (RT_LIKELY( pGVM->cCpusUnsafe == pGVM->cCpus
1892	&& pGVM->hSelfUnsafe == hGVM
1893	&& pGVM->pSelf == pGVM))
1894	{
1895	if (RT_LIKELY( pGVM->enmVMState >= VMSTATE_CREATING
1896	&& pGVM->enmVMState <= VMSTATE_TERMINATED))
1897	{
1898	*ppGVMM = pGVMM;
1899	return VINF_SUCCESS;
1900	}
1901	rc = VERR_INCONSISTENT_VM_HANDLE;
1902	}
1903	else
1904	rc = VERR_INCONSISTENT_VM_HANDLE;
1905	}
1906	else
1907	rc = VERR_INVALID_VM_HANDLE;
1908
1909	if (fTakeUsedLock)
1910	GVMMR0_USED_SHARED_UNLOCK(pGVMM);
1911	}
1912	else
1913	rc = VERR_INVALID_VM_HANDLE;
1914	}
1915	else
1916	rc = VERR_INVALID_POINTER;
1917	return rc;
1918	}
1919
1920
1921	/**
1922	* Validates a GVM/VM pair.
1923	*
1924	* @returns VBox status code.
1925	* @param pGVM The global (ring-0) VM structure.
1926	*/
1927	GVMMR0DECL(int) GVMMR0ValidateGVM(PGVM pGVM)
1928	{
1929	PGVMM pGVMM;
1930	return gvmmR0ByGVM(pGVM, &pGVMM, false /fTakeUsedLock/);
1931	}
1932
1933
1934	/**
1935	* Check that the given GVM and VM structures match up.
1936	*
1937	* The calling thread must be in the same process as the VM. All current lookups
1938	* are by threads inside the same process, so this will not be an issue.
1939	*
1940	* @returns VBox status code.
1941	* @param pGVM The global (ring-0) VM structure.
1942	* @param idCpu The (alleged) Virtual CPU ID of the calling EMT.
1943	* @param ppGVMM Where to store the pointer to the GVMM instance data.
1944	* @thread EMT
1945	*
1946	* @remarks This will assert in all failure paths.
1947	*/
1948	static int gvmmR0ByGVMandEMT(PGVM pGVM, VMCPUID idCpu, PGVMM *ppGVMM)
1949	{
1950	/*
1951	* Check the pointers.
1952	*/
1953	AssertPtrReturn(pGVM, VERR_INVALID_POINTER);
1954	AssertReturn(((uintptr_t)pGVM & HOST_PAGE_OFFSET_MASK) == 0, VERR_INVALID_POINTER);
1955
1956	/*
1957	* Get the pGVMM instance and check the VM handle.
1958	*/
1959	PGVMM pGVMM;
1960	GVMM_GET_VALID_INSTANCE(pGVMM, VERR_GVMM_INSTANCE);
1961
1962	uint16_t hGVM = pGVM->hSelf;
1963	ASMCompilerBarrier();
1964	AssertReturn( hGVM != NIL_GVM_HANDLE
1965	&& hGVM < RT_ELEMENTS(pGVMM->aHandles), VERR_INVALID_VM_HANDLE);
1966
1967	RTPROCESS const pidSelf = RTProcSelf();
1968	PGVMHANDLE pHandle = &pGVMM->aHandles[hGVM];
1969	AssertReturn( pHandle->pGVM == pGVM
1970	&& pHandle->ProcId == pidSelf
1971	&& RT_VALID_PTR(pHandle->pvObj),
1972	VERR_INVALID_HANDLE);
1973
1974	/*
1975	* Check the EMT claim.
1976	*/
1977	RTNATIVETHREAD const hAllegedEMT = RTThreadNativeSelf();
1978	AssertReturn(idCpu < pGVM->cCpus, VERR_INVALID_CPU_ID);
1979	AssertReturn(pGVM->aCpus[idCpu].hEMT == hAllegedEMT, VERR_NOT_OWNER);
1980
1981	/*
1982	* Some more VM data consistency checks.
1983	*/
1984	AssertReturn(pGVM->cCpusUnsafe == pGVM->cCpus, VERR_INCONSISTENT_VM_HANDLE);
1985	AssertReturn(pGVM->hSelfUnsafe == hGVM, VERR_INCONSISTENT_VM_HANDLE);
1986	AssertReturn( pGVM->enmVMState >= VMSTATE_CREATING
1987	&& pGVM->enmVMState <= VMSTATE_TERMINATED, VERR_INCONSISTENT_VM_HANDLE);
1988
1989	*ppGVMM = pGVMM;
1990	return VINF_SUCCESS;
1991	}
1992
1993
1994	/**
1995	* Validates a GVM/EMT pair.
1996	*
1997	* @returns VBox status code.
1998	* @param pGVM The global (ring-0) VM structure.
1999	* @param idCpu The Virtual CPU ID of the calling EMT.
2000	* @thread EMT(idCpu)
2001	*/
2002	GVMMR0DECL(int) GVMMR0ValidateGVMandEMT(PGVM pGVM, VMCPUID idCpu)
2003	{
2004	PGVMM pGVMM;
2005	return gvmmR0ByGVMandEMT(pGVM, idCpu, &pGVMM);
2006	}
2007
2008
2009	/**
2010	* Looks up the VM belonging to the specified EMT thread.
2011	*
2012	* This is used by the assertion machinery in VMMR0.cpp to avoid causing
2013	* unnecessary kernel panics when the EMT thread hits an assertion. The
2014	* call may or not be an EMT thread.
2015	*
2016	* @returns Pointer to the VM on success, NULL on failure.
2017	* @param hEMT The native thread handle of the EMT.
2018	* NIL_RTNATIVETHREAD means the current thread
2019	*/
2020	GVMMR0DECL(PVMCC) GVMMR0GetVMByEMT(RTNATIVETHREAD hEMT)
2021	{
2022	/*
2023	* No Assertions here as we're usually called in a AssertMsgN or
2024	* RTAssert* context.
2025	*/
2026	PGVMM pGVMM = g_pGVMM;
2027	if ( !RT_VALID_PTR(pGVMM)
2028	\|\| pGVMM->u32Magic != GVMM_MAGIC)
2029	return NULL;
2030
2031	if (hEMT == NIL_RTNATIVETHREAD)
2032	hEMT = RTThreadNativeSelf();
2033	RTPROCESS ProcId = RTProcSelf();
2034
2035	/*
2036	* Search the handles in a linear fashion as we don't dare to take the lock (assert).
2037	*/
2038	/** @todo introduce some pid hash table here, please. */
2039	for (unsigned i = 1; i < RT_ELEMENTS(pGVMM->aHandles); i++)
2040	{
2041	if ( pGVMM->aHandles[i].iSelf == i
2042	&& pGVMM->aHandles[i].ProcId == ProcId
2043	&& RT_VALID_PTR(pGVMM->aHandles[i].pvObj)
2044	&& RT_VALID_PTR(pGVMM->aHandles[i].pGVM))
2045	{
2046	if (pGVMM->aHandles[i].hEMT0 == hEMT)
2047	return pGVMM->aHandles[i].pGVM;
2048
2049	/* This is fearly safe with the current process per VM approach. */
2050	PGVM pGVM = pGVMM->aHandles[i].pGVM;
2051	VMCPUID const cCpus = pGVM->cCpus;
2052	ASMCompilerBarrier();
2053	if ( cCpus < 1
2054	\|\| cCpus > VMM_MAX_CPU_COUNT)
2055	continue;
2056	for (VMCPUID idCpu = 1; idCpu < cCpus; idCpu++)
2057	if (pGVM->aCpus[idCpu].hEMT == hEMT)
2058	return pGVMM->aHandles[i].pGVM;
2059	}
2060	}
2061	return NULL;
2062	}
2063
2064
2065	/**
2066	* Looks up the GVMCPU belonging to the specified EMT thread.
2067	*
2068	* This is used by the assertion machinery in VMMR0.cpp to avoid causing
2069	* unnecessary kernel panics when the EMT thread hits an assertion. The
2070	* call may or not be an EMT thread.
2071	*
2072	* @returns Pointer to the VM on success, NULL on failure.
2073	* @param hEMT The native thread handle of the EMT.
2074	* NIL_RTNATIVETHREAD means the current thread
2075	*/
2076	GVMMR0DECL(PGVMCPU) GVMMR0GetGVCpuByEMT(RTNATIVETHREAD hEMT)
2077	{
2078	/*
2079	* No Assertions here as we're usually called in a AssertMsgN,
2080	* RTAssert*, Log and LogRel contexts.
2081	*/
2082	PGVMM pGVMM = g_pGVMM;
2083	if ( !RT_VALID_PTR(pGVMM)
2084	\|\| pGVMM->u32Magic != GVMM_MAGIC)
2085	return NULL;
2086
2087	if (hEMT == NIL_RTNATIVETHREAD)
2088	hEMT = RTThreadNativeSelf();
2089	RTPROCESS ProcId = RTProcSelf();
2090
2091	/*
2092	* Search the handles in a linear fashion as we don't dare to take the lock (assert).
2093	*/
2094	/** @todo introduce some pid hash table here, please. */
2095	for (unsigned i = 1; i < RT_ELEMENTS(pGVMM->aHandles); i++)
2096	{
2097	if ( pGVMM->aHandles[i].iSelf == i
2098	&& pGVMM->aHandles[i].ProcId == ProcId
2099	&& RT_VALID_PTR(pGVMM->aHandles[i].pvObj)
2100	&& RT_VALID_PTR(pGVMM->aHandles[i].pGVM))
2101	{
2102	PGVM pGVM = pGVMM->aHandles[i].pGVM;
2103	if (pGVMM->aHandles[i].hEMT0 == hEMT)
2104	return &pGVM->aCpus[0];
2105
2106	/* This is fearly safe with the current process per VM approach. */
2107	VMCPUID const cCpus = pGVM->cCpus;
2108	ASMCompilerBarrier();
2109	ASMCompilerBarrier();
2110	if ( cCpus < 1
2111	\|\| cCpus > VMM_MAX_CPU_COUNT)
2112	continue;
2113	for (VMCPUID idCpu = 1; idCpu < cCpus; idCpu++)
2114	if (pGVM->aCpus[idCpu].hEMT == hEMT)
2115	return &pGVM->aCpus[idCpu];
2116	}
2117	}
2118	return NULL;
2119	}
2120
2121
2122	/**
2123	* Get the GVMCPU structure for the given EMT.
2124	*
2125	* @returns The VCpu structure for @a hEMT, NULL if not an EMT.
2126	* @param pGVM The global (ring-0) VM structure.
2127	* @param hEMT The native thread handle of the EMT.
2128	* NIL_RTNATIVETHREAD means the current thread
2129	*/
2130	GVMMR0DECL(PGVMCPU) GVMMR0GetGVCpuByGVMandEMT(PGVM pGVM, RTNATIVETHREAD hEMT)
2131	{
2132	/*
2133	* Validate & adjust input.
2134	*/
2135	AssertPtr(pGVM);
2136	Assert(pGVM->u32Magic == GVM_MAGIC);
2137	if (hEMT == NIL_RTNATIVETHREAD /* likely */)
2138	{
2139	hEMT = RTThreadNativeSelf();
2140	AssertReturn(hEMT != NIL_RTNATIVETHREAD, NULL);
2141	}
2142
2143	/*
2144	* Find the matching hash table entry.
2145	* See similar code in GVMMR0GetRing3ThreadForSelf.
2146	*/
2147	uint32_t idxHash = GVMM_EMT_HASH_1(hEMT);
2148	if (pGVM->gvmm.s.aEmtHash[idxHash].hNativeEmt == hEMT)
2149	{ /* likely */ }
2150	else
2151	{
2152	#ifdef VBOX_STRICT
2153	unsigned cCollisions = 0;
2154	#endif
2155	uint32_t const idxHash2 = GVMM_EMT_HASH_2(hEMT);
2156	for (;;)
2157	{
2158	Assert(cCollisions++ < GVMM_EMT_HASH_SIZE);
2159	idxHash = (idxHash + idxHash2) % GVMM_EMT_HASH_SIZE;
2160	if (pGVM->gvmm.s.aEmtHash[idxHash].hNativeEmt == hEMT)
2161	break;
2162	if (pGVM->gvmm.s.aEmtHash[idxHash].hNativeEmt == NIL_RTNATIVETHREAD)
2163	{
2164	#ifdef VBOX_STRICT
2165	uint32_t idxCpu = pGVM->cCpus;
2166	AssertStmt(idxCpu < VMM_MAX_CPU_COUNT, idxCpu = VMM_MAX_CPU_COUNT);
2167	while (idxCpu-- > 0)
2168	Assert(pGVM->aCpus[idxCpu].hNativeThreadR0 != hEMT);
2169	#endif
2170	return NULL;
2171	}
2172	}
2173	}
2174
2175	/*
2176	* Validate the VCpu number and translate it into a pointer.
2177	*/
2178	VMCPUID const idCpu = pGVM->gvmm.s.aEmtHash[idxHash].idVCpu;
2179	AssertReturn(idCpu < pGVM->cCpus, NULL);
2180	PGVMCPU pGVCpu = &pGVM->aCpus[idCpu];
2181	Assert(pGVCpu->hNativeThreadR0 == hEMT);
2182	Assert(pGVCpu->gvmm.s.idxEmtHash == idxHash);
2183	return pGVCpu;
2184	}
2185
2186
2187	/**
2188	* Get the native ring-3 thread handle for the caller.
2189	*
2190	* This works for EMTs and registered workers.
2191	*
2192	* @returns ring-3 native thread handle or NIL_RTNATIVETHREAD.
2193	* @param pGVM The global (ring-0) VM structure.
2194	*/
2195	GVMMR0DECL(RTNATIVETHREAD) GVMMR0GetRing3ThreadForSelf(PGVM pGVM)
2196	{
2197	/*
2198	* Validate input.
2199	*/
2200	AssertPtr(pGVM);
2201	AssertReturn(pGVM->u32Magic == GVM_MAGIC, NIL_RTNATIVETHREAD);
2202	RTNATIVETHREAD const hNativeSelf = RTThreadNativeSelf();
2203	AssertReturn(hNativeSelf != NIL_RTNATIVETHREAD, NIL_RTNATIVETHREAD);
2204
2205	/*
2206	* Find the matching hash table entry.
2207	* See similar code in GVMMR0GetGVCpuByGVMandEMT.
2208	*/
2209	uint32_t idxHash = GVMM_EMT_HASH_1(hNativeSelf);
2210	if (pGVM->gvmm.s.aEmtHash[idxHash].hNativeEmt == hNativeSelf)
2211	{ /* likely */ }
2212	else
2213	{
2214	#ifdef VBOX_STRICT
2215	unsigned cCollisions = 0;
2216	#endif
2217	uint32_t const idxHash2 = GVMM_EMT_HASH_2(hNativeSelf);
2218	for (;;)
2219	{
2220	Assert(cCollisions++ < GVMM_EMT_HASH_SIZE);
2221	idxHash = (idxHash + idxHash2) % GVMM_EMT_HASH_SIZE;
2222	if (pGVM->gvmm.s.aEmtHash[idxHash].hNativeEmt == hNativeSelf)
2223	break;
2224	if (pGVM->gvmm.s.aEmtHash[idxHash].hNativeEmt == NIL_RTNATIVETHREAD)
2225	{
2226	#ifdef VBOX_STRICT
2227	uint32_t idxCpu = pGVM->cCpus;
2228	AssertStmt(idxCpu < VMM_MAX_CPU_COUNT, idxCpu = VMM_MAX_CPU_COUNT);
2229	while (idxCpu-- > 0)
2230	Assert(pGVM->aCpus[idxCpu].hNativeThreadR0 != hNativeSelf);
2231	#endif
2232
2233	/*
2234	* Not an EMT, so see if it's a worker thread.
2235	*/
2236	size_t idx = RT_ELEMENTS(pGVM->gvmm.s.aWorkerThreads);
2237	while (--idx > GVMMWORKERTHREAD_INVALID)
2238	if (pGVM->gvmm.s.aWorkerThreads[idx].hNativeThread == hNativeSelf)
2239	return pGVM->gvmm.s.aWorkerThreads[idx].hNativeThreadR3;
2240
2241	return NIL_RTNATIVETHREAD;
2242	}
2243	}
2244	}
2245
2246	/*
2247	* Validate the VCpu number and translate it into a pointer.
2248	*/
2249	VMCPUID const idCpu = pGVM->gvmm.s.aEmtHash[idxHash].idVCpu;
2250	AssertReturn(idCpu < pGVM->cCpus, NIL_RTNATIVETHREAD);
2251	PGVMCPU pGVCpu = &pGVM->aCpus[idCpu];
2252	Assert(pGVCpu->hNativeThreadR0 == hNativeSelf);
2253	Assert(pGVCpu->gvmm.s.idxEmtHash == idxHash);
2254	return pGVCpu->hNativeThread;
2255	}
2256
2257
2258	/**
2259	* Converts a pointer with the GVM structure to a host physical address.
2260	*
2261	* @returns Host physical address.
2262	* @param pGVM The global (ring-0) VM structure.
2263	* @param pv The address to convert.
2264	* @thread EMT
2265	*/
2266	GVMMR0DECL(RTHCPHYS) GVMMR0ConvertGVMPtr2HCPhys(PGVM pGVM, void *pv)
2267	{
2268	AssertPtr(pGVM);
2269	Assert(pGVM->u32Magic == GVM_MAGIC);
2270	uintptr_t const off = (uintptr_t)pv - (uintptr_t)pGVM;
2271	Assert(off < RT_UOFFSETOF_DYN(GVM, aCpus[pGVM->cCpus]));
2272	return RTR0MemObjGetPagePhysAddr(pGVM->gvmm.s.VMMemObj, off >> HOST_PAGE_SHIFT) \| ((uintptr_t)pv & HOST_PAGE_OFFSET_MASK);
2273	}
2274
2275
2276	/**
2277	* This is will wake up expired and soon-to-be expired VMs.
2278	*
2279	* @returns Number of VMs that has been woken up.
2280	* @param pGVMM Pointer to the GVMM instance data.
2281	* @param u64Now The current time.
2282	*/
2283	static unsigned gvmmR0SchedDoWakeUps(PGVMM pGVMM, uint64_t u64Now)
2284	{
2285	/*
2286	* Skip this if we've got disabled because of high resolution wakeups or by
2287	* the user.
2288	*/
2289	if (!pGVMM->fDoEarlyWakeUps)
2290	return 0;
2291
2292	/** @todo Rewrite this algorithm. See performance defect XYZ. */
2293
2294	/*
2295	* A cheap optimization to stop wasting so much time here on big setups.
2296	*/
2297	const uint64_t uNsEarlyWakeUp2 = u64Now + pGVMM->nsEarlyWakeUp2;
2298	if ( pGVMM->cHaltedEMTs == 0
2299	\|\| uNsEarlyWakeUp2 > pGVMM->uNsNextEmtWakeup)
2300	return 0;
2301
2302	/*
2303	* Only one thread doing this at a time.
2304	*/
2305	if (!ASMAtomicCmpXchgBool(&pGVMM->fDoingEarlyWakeUps, true, false))
2306	return 0;
2307
2308	/*
2309	* The first pass will wake up VMs which have actually expired
2310	* and look for VMs that should be woken up in the 2nd and 3rd passes.
2311	*/
2312	const uint64_t uNsEarlyWakeUp1 = u64Now + pGVMM->nsEarlyWakeUp1;
2313	uint64_t u64Min = UINT64_MAX;
2314	unsigned cWoken = 0;
2315	unsigned cHalted = 0;
2316	unsigned cTodo2nd = 0;
2317	unsigned cTodo3rd = 0;
2318	for (unsigned i = pGVMM->iUsedHead, cGuard = 0;
2319	i != NIL_GVM_HANDLE && i < RT_ELEMENTS(pGVMM->aHandles);
2320	i = pGVMM->aHandles[i].iNext)
2321	{
2322	PGVM pCurGVM = pGVMM->aHandles[i].pGVM;
2323	if ( RT_VALID_PTR(pCurGVM)
2324	&& pCurGVM->u32Magic == GVM_MAGIC)
2325	{
2326	for (VMCPUID idCpu = 0; idCpu < pCurGVM->cCpus; idCpu++)
2327	{
2328	PGVMCPU pCurGVCpu = &pCurGVM->aCpus[idCpu];
2329	uint64_t u64 = ASMAtomicUoReadU64(&pCurGVCpu->gvmm.s.u64HaltExpire);
2330	if (u64)
2331	{
2332	if (u64 <= u64Now)
2333	{
2334	if (ASMAtomicXchgU64(&pCurGVCpu->gvmm.s.u64HaltExpire, 0))
2335	{
2336	int rc = RTSemEventMultiSignal(pCurGVCpu->gvmm.s.HaltEventMulti);
2337	AssertRC(rc);
2338	cWoken++;
2339	}
2340	}
2341	else
2342	{
2343	cHalted++;
2344	if (u64 <= uNsEarlyWakeUp1)
2345	cTodo2nd++;
2346	else if (u64 <= uNsEarlyWakeUp2)
2347	cTodo3rd++;
2348	else if (u64 < u64Min)
2349	u64 = u64Min;
2350	}
2351	}
2352	}
2353	}
2354	AssertLogRelBreak(cGuard++ < RT_ELEMENTS(pGVMM->aHandles));
2355	}
2356
2357	if (cTodo2nd)
2358	{
2359	for (unsigned i = pGVMM->iUsedHead, cGuard = 0;
2360	i != NIL_GVM_HANDLE && i < RT_ELEMENTS(pGVMM->aHandles);
2361	i = pGVMM->aHandles[i].iNext)
2362	{
2363	PGVM pCurGVM = pGVMM->aHandles[i].pGVM;
2364	if ( RT_VALID_PTR(pCurGVM)
2365	&& pCurGVM->u32Magic == GVM_MAGIC)
2366	{
2367	for (VMCPUID idCpu = 0; idCpu < pCurGVM->cCpus; idCpu++)
2368	{
2369	PGVMCPU pCurGVCpu = &pCurGVM->aCpus[idCpu];
2370	uint64_t u64 = ASMAtomicUoReadU64(&pCurGVCpu->gvmm.s.u64HaltExpire);
2371	if ( u64
2372	&& u64 <= uNsEarlyWakeUp1)
2373	{
2374	if (ASMAtomicXchgU64(&pCurGVCpu->gvmm.s.u64HaltExpire, 0))
2375	{
2376	int rc = RTSemEventMultiSignal(pCurGVCpu->gvmm.s.HaltEventMulti);
2377	AssertRC(rc);
2378	cWoken++;
2379	}
2380	}
2381	}
2382	}
2383	AssertLogRelBreak(cGuard++ < RT_ELEMENTS(pGVMM->aHandles));
2384	}
2385	}
2386
2387	if (cTodo3rd)
2388	{
2389	for (unsigned i = pGVMM->iUsedHead, cGuard = 0;
2390	i != NIL_GVM_HANDLE && i < RT_ELEMENTS(pGVMM->aHandles);
2391	i = pGVMM->aHandles[i].iNext)
2392	{
2393	PGVM pCurGVM = pGVMM->aHandles[i].pGVM;
2394	if ( RT_VALID_PTR(pCurGVM)
2395	&& pCurGVM->u32Magic == GVM_MAGIC)
2396	{
2397	for (VMCPUID idCpu = 0; idCpu < pCurGVM->cCpus; idCpu++)
2398	{
2399	PGVMCPU pCurGVCpu = &pCurGVM->aCpus[idCpu];
2400	uint64_t u64 = ASMAtomicUoReadU64(&pCurGVCpu->gvmm.s.u64HaltExpire);
2401	if ( u64
2402	&& u64 <= uNsEarlyWakeUp2)
2403	{
2404	if (ASMAtomicXchgU64(&pCurGVCpu->gvmm.s.u64HaltExpire, 0))
2405	{
2406	int rc = RTSemEventMultiSignal(pCurGVCpu->gvmm.s.HaltEventMulti);
2407	AssertRC(rc);
2408	cWoken++;
2409	}
2410	}
2411	}
2412	}
2413	AssertLogRelBreak(cGuard++ < RT_ELEMENTS(pGVMM->aHandles));
2414	}
2415	}
2416
2417	/*
2418	* Set the minimum value.
2419	*/
2420	pGVMM->uNsNextEmtWakeup = u64Min;
2421
2422	ASMAtomicWriteBool(&pGVMM->fDoingEarlyWakeUps, false);
2423	return cWoken;
2424	}
2425
2426
2427	#ifdef GVMM_SCHED_WITH_HR_WAKE_UP_TIMER
2428	/**
2429	* Timer callback for the EMT high-resolution wake-up timer.
2430	*
2431	* @param pTimer The timer handle.
2432	* @param pvUser The global (ring-0) CPU structure for the EMT to wake up.
2433	* @param iTick The current tick.
2434	*/
2435	static DECLCALLBACK(void) gvmmR0EmtWakeUpTimerCallback(PRTTIMER pTimer, void *pvUser, uint64_t iTick)
2436	{
2437	PGVMCPU pGVCpu = (PGVMCPU)pvUser;
2438	NOREF(pTimer); NOREF(iTick);
2439
2440	pGVCpu->gvmm.s.fHrWakeUptimerArmed = false;
2441	if (pGVCpu->gvmm.s.u64HaltExpire != 0)
2442	{
2443	RTSemEventMultiSignal(pGVCpu->gvmm.s.HaltEventMulti);
2444	pGVCpu->gvmm.s.Stats.cWakeUpTimerHits += 1;
2445	}
2446	else
2447	pGVCpu->gvmm.s.Stats.cWakeUpTimerMisses += 1;
2448
2449	if (RTMpCpuId() == pGVCpu->gvmm.s.idHaltedOnCpu)
2450	pGVCpu->gvmm.s.Stats.cWakeUpTimerSameCpu += 1;
2451	}
2452	#endif /* GVMM_SCHED_WITH_HR_WAKE_UP_TIMER */
2453
2454
2455	/**
2456	* Halt the EMT thread.
2457	*
2458	* @returns VINF_SUCCESS normal wakeup (timeout or kicked by other thread).
2459	* VERR_INTERRUPTED if a signal was scheduled for the thread.
2460	* @param pGVM The global (ring-0) VM structure.
2461	* @param pGVCpu The global (ring-0) CPU structure of the calling
2462	* EMT.
2463	* @param u64ExpireGipTime The time for the sleep to expire expressed as GIP time.
2464	* @thread EMT(pGVCpu).
2465	*/
2466	GVMMR0DECL(int) GVMMR0SchedHalt(PGVM pGVM, PGVMCPU pGVCpu, uint64_t u64ExpireGipTime)
2467	{
2468	LogFlow(("GVMMR0SchedHalt: pGVM=%p pGVCpu=%p(%d) u64ExpireGipTime=%#RX64\n",
2469	pGVM, pGVCpu, pGVCpu->idCpu, u64ExpireGipTime));
2470	PGVMM pGVMM;
2471	GVMM_GET_VALID_INSTANCE(pGVMM, VERR_GVMM_INSTANCE);
2472
2473	pGVM->gvmm.s.StatsSched.cHaltCalls++;
2474	Assert(!pGVCpu->gvmm.s.u64HaltExpire);
2475
2476	/*
2477	* If we're doing early wake-ups, we must take the UsedList lock before we
2478	* start querying the current time.
2479	* Note! Interrupts must NOT be disabled at this point because we ask for GIP time!
2480	*/
2481	bool const fDoEarlyWakeUps = pGVMM->fDoEarlyWakeUps;
2482	if (fDoEarlyWakeUps)
2483	{
2484	int rc2 = GVMMR0_USED_SHARED_LOCK(pGVMM); AssertRC(rc2);
2485	}
2486
2487	/* GIP hack: We might are frequently sleeping for short intervals where the
2488	difference between GIP and system time matters on systems with high resolution
2489	system time. So, convert the input from GIP to System time in that case. */
2490	Assert(ASMGetFlags() & X86_EFL_IF);
2491	const uint64_t u64NowSys = RTTimeSystemNanoTS();
2492	const uint64_t u64NowGip = RTTimeNanoTS();
2493
2494	if (fDoEarlyWakeUps)
2495	pGVM->gvmm.s.StatsSched.cHaltWakeUps += gvmmR0SchedDoWakeUps(pGVMM, u64NowGip);
2496
2497	/*
2498	* Go to sleep if we must...
2499	* Cap the sleep time to 1 second to be on the safe side.
2500	*/
2501	int rc;
2502	uint64_t cNsInterval = u64ExpireGipTime - u64NowGip;
2503	if ( u64NowGip < u64ExpireGipTime
2504	&& ( cNsInterval >= (pGVMM->cEMTs > pGVMM->cEMTsMeansCompany
2505	? pGVMM->nsMinSleepCompany
2506	: pGVMM->nsMinSleepAlone)
2507	#ifdef GVMM_SCHED_WITH_HR_WAKE_UP_TIMER
2508	\|\| (pGVCpu->gvmm.s.hHrWakeUpTimer != NULL && cNsInterval >= pGVMM->nsMinSleepWithHrTimer)
2509	#endif
2510	)
2511	)
2512	{
2513	pGVM->gvmm.s.StatsSched.cHaltBlocking++;
2514	if (cNsInterval > RT_NS_1SEC)
2515	u64ExpireGipTime = u64NowGip + RT_NS_1SEC;
2516	ASMAtomicWriteU64(&pGVCpu->gvmm.s.u64HaltExpire, u64ExpireGipTime);
2517	ASMAtomicIncU32(&pGVMM->cHaltedEMTs);
2518	if (fDoEarlyWakeUps)
2519	{
2520	if (u64ExpireGipTime < pGVMM->uNsNextEmtWakeup)
2521	pGVMM->uNsNextEmtWakeup = u64ExpireGipTime;
2522	GVMMR0_USED_SHARED_UNLOCK(pGVMM);
2523	}
2524
2525	#ifdef GVMM_SCHED_WITH_HR_WAKE_UP_TIMER
2526	if ( pGVCpu->gvmm.s.hHrWakeUpTimer != NULL
2527	&& cNsInterval >= RT_MIN(RT_NS_1US, pGVMM->nsMinSleepWithHrTimer))
2528	{
2529	STAM_REL_PROFILE_START(&pGVCpu->gvmm.s.Stats.Start, a);
2530	RTTimerStart(pGVCpu->gvmm.s.hHrWakeUpTimer, cNsInterval);
2531	pGVCpu->gvmm.s.fHrWakeUptimerArmed = true;
2532	pGVCpu->gvmm.s.idHaltedOnCpu = RTMpCpuId();
2533	STAM_REL_PROFILE_STOP(&pGVCpu->gvmm.s.Stats.Start, a);
2534	}
2535	#endif
2536
2537	rc = RTSemEventMultiWaitEx(pGVCpu->gvmm.s.HaltEventMulti,
2538	RTSEMWAIT_FLAGS_ABSOLUTE \| RTSEMWAIT_FLAGS_NANOSECS \| RTSEMWAIT_FLAGS_INTERRUPTIBLE,
2539	u64NowGip > u64NowSys ? u64ExpireGipTime : u64NowSys + cNsInterval);
2540
2541	ASMAtomicWriteU64(&pGVCpu->gvmm.s.u64HaltExpire, 0);
2542	ASMAtomicDecU32(&pGVMM->cHaltedEMTs);
2543
2544	#ifdef GVMM_SCHED_WITH_HR_WAKE_UP_TIMER
2545	if (!pGVCpu->gvmm.s.fHrWakeUptimerArmed)
2546	{ /* likely */ }
2547	else
2548	{
2549	STAM_REL_PROFILE_START(&pGVCpu->gvmm.s.Stats.Stop, a);
2550	RTTimerStop(pGVCpu->gvmm.s.hHrWakeUpTimer);
2551	pGVCpu->gvmm.s.fHrWakeUptimerArmed = false;
2552	pGVCpu->gvmm.s.Stats.cWakeUpTimerCanceled += 1;
2553	STAM_REL_PROFILE_STOP(&pGVCpu->gvmm.s.Stats.Stop, a);
2554	}
2555	#endif
2556
2557	/* Reset the semaphore to try prevent a few false wake-ups. */
2558	if (rc == VINF_SUCCESS)
2559	RTSemEventMultiReset(pGVCpu->gvmm.s.HaltEventMulti);
2560	else if (rc == VERR_TIMEOUT)
2561	{
2562	pGVM->gvmm.s.StatsSched.cHaltTimeouts++;
2563	rc = VINF_SUCCESS;
2564	}
2565	}
2566	else
2567	{
2568	pGVM->gvmm.s.StatsSched.cHaltNotBlocking++;
2569	if (fDoEarlyWakeUps)
2570	GVMMR0_USED_SHARED_UNLOCK(pGVMM);
2571	RTSemEventMultiReset(pGVCpu->gvmm.s.HaltEventMulti);
2572	rc = VINF_SUCCESS;
2573	}
2574
2575	return rc;
2576	}
2577
2578
2579	/**
2580	* Halt the EMT thread.
2581	*
2582	* @returns VINF_SUCCESS normal wakeup (timeout or kicked by other thread).
2583	* VERR_INTERRUPTED if a signal was scheduled for the thread.
2584	* @param pGVM The global (ring-0) VM structure.
2585	* @param idCpu The Virtual CPU ID of the calling EMT.
2586	* @param u64ExpireGipTime The time for the sleep to expire expressed as GIP time.
2587	* @thread EMT(idCpu).
2588	*/
2589	GVMMR0DECL(int) GVMMR0SchedHaltReq(PGVM pGVM, VMCPUID idCpu, uint64_t u64ExpireGipTime)
2590	{
2591	PGVMM pGVMM;
2592	int rc = gvmmR0ByGVMandEMT(pGVM, idCpu, &pGVMM);
2593	if (RT_SUCCESS(rc))
2594	rc = GVMMR0SchedHalt(pGVM, &pGVM->aCpus[idCpu], u64ExpireGipTime);
2595	return rc;
2596	}
2597
2598
2599
2600	/**
2601	* Worker for GVMMR0SchedWakeUp and GVMMR0SchedWakeUpAndPokeCpus that wakes up
2602	* the a sleeping EMT.
2603	*
2604	* @retval VINF_SUCCESS if successfully woken up.
2605	* @retval VINF_GVM_NOT_BLOCKED if the EMT wasn't blocked.
2606	*
2607	* @param pGVM The global (ring-0) VM structure.
2608	* @param pGVCpu The global (ring-0) VCPU structure.
2609	*/
2610	DECLINLINE(int) gvmmR0SchedWakeUpOne(PGVM pGVM, PGVMCPU pGVCpu)
2611	{
2612	pGVM->gvmm.s.StatsSched.cWakeUpCalls++;
2613
2614	/*
2615	* Signal the semaphore regardless of whether it's current blocked on it.
2616	*
2617	* The reason for this is that there is absolutely no way we can be 100%
2618	* certain that it isn't about go to go to sleep on it and just got
2619	* delayed a bit en route. So, we will always signal the semaphore when
2620	* the it is flagged as halted in the VMM.
2621	*/
2622	/** @todo we can optimize some of that by means of the pVCpu->enmState now. */
2623	int rc;
2624	if (pGVCpu->gvmm.s.u64HaltExpire)
2625	{
2626	rc = VINF_SUCCESS;
2627	ASMAtomicWriteU64(&pGVCpu->gvmm.s.u64HaltExpire, 0);
2628	}
2629	else
2630	{
2631	rc = VINF_GVM_NOT_BLOCKED;
2632	pGVM->gvmm.s.StatsSched.cWakeUpNotHalted++;
2633	}
2634
2635	int rc2 = RTSemEventMultiSignal(pGVCpu->gvmm.s.HaltEventMulti);
2636	AssertRC(rc2);
2637
2638	return rc;
2639	}
2640
2641
2642	/**
2643	* Wakes up the halted EMT thread so it can service a pending request.
2644	*
2645	* @returns VBox status code.
2646	* @retval VINF_SUCCESS if successfully woken up.
2647	* @retval VINF_GVM_NOT_BLOCKED if the EMT wasn't blocked.
2648	*
2649	* @param pGVM The global (ring-0) VM structure.
2650	* @param idCpu The Virtual CPU ID of the EMT to wake up.
2651	* @param fTakeUsedLock Take the used lock or not
2652	* @thread Any but EMT(idCpu).
2653	*/
2654	GVMMR0DECL(int) GVMMR0SchedWakeUpEx(PGVM pGVM, VMCPUID idCpu, bool fTakeUsedLock)
2655	{
2656	/*
2657	* Validate input and take the UsedLock.
2658	*/
2659	PGVMM pGVMM;
2660	int rc = gvmmR0ByGVM(pGVM, &pGVMM, fTakeUsedLock);
2661	if (RT_SUCCESS(rc))
2662	{
2663	if (idCpu < pGVM->cCpus)
2664	{
2665	/*
2666	* Do the actual job.
2667	*/
2668	rc = gvmmR0SchedWakeUpOne(pGVM, &pGVM->aCpus[idCpu]);
2669
2670	if (fTakeUsedLock && pGVMM->fDoEarlyWakeUps)
2671	{
2672	/*
2673	* While we're here, do a round of scheduling.
2674	*/
2675	Assert(ASMGetFlags() & X86_EFL_IF);
2676	const uint64_t u64Now = RTTimeNanoTS(); /* (GIP time) */
2677	pGVM->gvmm.s.StatsSched.cWakeUpWakeUps += gvmmR0SchedDoWakeUps(pGVMM, u64Now);
2678	}
2679	}
2680	else
2681	rc = VERR_INVALID_CPU_ID;
2682
2683	if (fTakeUsedLock)
2684	{
2685	int rc2 = GVMMR0_USED_SHARED_UNLOCK(pGVMM);
2686	AssertRC(rc2);
2687	}
2688	}
2689
2690	LogFlow(("GVMMR0SchedWakeUpEx: returns %Rrc\n", rc));
2691	return rc;
2692	}
2693
2694
2695	/**
2696	* Wakes up the halted EMT thread so it can service a pending request.
2697	*
2698	* @returns VBox status code.
2699	* @retval VINF_SUCCESS if successfully woken up.
2700	* @retval VINF_GVM_NOT_BLOCKED if the EMT wasn't blocked.
2701	*
2702	* @param pGVM The global (ring-0) VM structure.
2703	* @param idCpu The Virtual CPU ID of the EMT to wake up.
2704	* @thread Any but EMT(idCpu).
2705	*/
2706	GVMMR0DECL(int) GVMMR0SchedWakeUp(PGVM pGVM, VMCPUID idCpu)
2707	{
2708	return GVMMR0SchedWakeUpEx(pGVM, idCpu, true /* fTakeUsedLock */);
2709	}
2710
2711
2712	/**
2713	* Wakes up the halted EMT thread so it can service a pending request, no GVM
2714	* parameter and no used locking.
2715	*
2716	* @returns VBox status code.
2717	* @retval VINF_SUCCESS if successfully woken up.
2718	* @retval VINF_GVM_NOT_BLOCKED if the EMT wasn't blocked.
2719	*
2720	* @param pGVM The global (ring-0) VM structure.
2721	* @param idCpu The Virtual CPU ID of the EMT to wake up.
2722	* @thread Any but EMT(idCpu).
2723	* @deprecated Don't use in new code if possible! Use the GVM variant.
2724	*/
2725	GVMMR0DECL(int) GVMMR0SchedWakeUpNoGVMNoLock(PGVM pGVM, VMCPUID idCpu)
2726	{
2727	PGVMM pGVMM;
2728	int rc = gvmmR0ByGVM(pGVM, &pGVMM, false /fTakeUsedLock/);
2729	if (RT_SUCCESS(rc))
2730	rc = GVMMR0SchedWakeUpEx(pGVM, idCpu, false /fTakeUsedLock/);
2731	return rc;
2732	}
2733
2734
2735	/**
2736	* Worker common to GVMMR0SchedPoke and GVMMR0SchedWakeUpAndPokeCpus that pokes
2737	* the Virtual CPU if it's still busy executing guest code.
2738	*
2739	* @returns VBox status code.
2740	* @retval VINF_SUCCESS if poked successfully.
2741	* @retval VINF_GVM_NOT_BUSY_IN_GC if the EMT wasn't busy in GC.
2742	*
2743	* @param pGVM The global (ring-0) VM structure.
2744	* @param pVCpu The cross context virtual CPU structure.
2745	*/
2746	DECLINLINE(int) gvmmR0SchedPokeOne(PGVM pGVM, PVMCPUCC pVCpu)
2747	{
2748	pGVM->gvmm.s.StatsSched.cPokeCalls++;
2749
2750	RTCPUID idHostCpu = pVCpu->idHostCpu;
2751	if ( idHostCpu == NIL_RTCPUID
2752	\|\| VMCPU_GET_STATE(pVCpu) != VMCPUSTATE_STARTED_EXEC)
2753	{
2754	pGVM->gvmm.s.StatsSched.cPokeNotBusy++;
2755	return VINF_GVM_NOT_BUSY_IN_GC;
2756	}
2757
2758	/* Note: this function is not implemented on Darwin and Linux (kernel < 2.6.19) */
2759	RTMpPokeCpu(idHostCpu);
2760	return VINF_SUCCESS;
2761	}
2762
2763
2764	/**
2765	* Pokes an EMT if it's still busy running guest code.
2766	*
2767	* @returns VBox status code.
2768	* @retval VINF_SUCCESS if poked successfully.
2769	* @retval VINF_GVM_NOT_BUSY_IN_GC if the EMT wasn't busy in GC.
2770	*
2771	* @param pGVM The global (ring-0) VM structure.
2772	* @param idCpu The ID of the virtual CPU to poke.
2773	* @param fTakeUsedLock Take the used lock or not
2774	*/
2775	GVMMR0DECL(int) GVMMR0SchedPokeEx(PGVM pGVM, VMCPUID idCpu, bool fTakeUsedLock)
2776	{
2777	/*
2778	* Validate input and take the UsedLock.
2779	*/
2780	PGVMM pGVMM;
2781	int rc = gvmmR0ByGVM(pGVM, &pGVMM, fTakeUsedLock);
2782	if (RT_SUCCESS(rc))
2783	{
2784	if (idCpu < pGVM->cCpus)
2785	rc = gvmmR0SchedPokeOne(pGVM, &pGVM->aCpus[idCpu]);
2786	else
2787	rc = VERR_INVALID_CPU_ID;
2788
2789	if (fTakeUsedLock)
2790	{
2791	int rc2 = GVMMR0_USED_SHARED_UNLOCK(pGVMM);
2792	AssertRC(rc2);
2793	}
2794	}
2795
2796	LogFlow(("GVMMR0SchedWakeUpAndPokeCpus: returns %Rrc\n", rc));
2797	return rc;
2798	}
2799
2800
2801	/**
2802	* Pokes an EMT if it's still busy running guest code.
2803	*
2804	* @returns VBox status code.
2805	* @retval VINF_SUCCESS if poked successfully.
2806	* @retval VINF_GVM_NOT_BUSY_IN_GC if the EMT wasn't busy in GC.
2807	*
2808	* @param pGVM The global (ring-0) VM structure.
2809	* @param idCpu The ID of the virtual CPU to poke.
2810	*/
2811	GVMMR0DECL(int) GVMMR0SchedPoke(PGVM pGVM, VMCPUID idCpu)
2812	{
2813	return GVMMR0SchedPokeEx(pGVM, idCpu, true /* fTakeUsedLock */);
2814	}
2815
2816
2817	/**
2818	* Pokes an EMT if it's still busy running guest code, no GVM parameter and no
2819	* used locking.
2820	*
2821	* @returns VBox status code.
2822	* @retval VINF_SUCCESS if poked successfully.
2823	* @retval VINF_GVM_NOT_BUSY_IN_GC if the EMT wasn't busy in GC.
2824	*
2825	* @param pGVM The global (ring-0) VM structure.
2826	* @param idCpu The ID of the virtual CPU to poke.
2827	*
2828	* @deprecated Don't use in new code if possible! Use the GVM variant.
2829	*/
2830	GVMMR0DECL(int) GVMMR0SchedPokeNoGVMNoLock(PGVM pGVM, VMCPUID idCpu)
2831	{
2832	PGVMM pGVMM;
2833	int rc = gvmmR0ByGVM(pGVM, &pGVMM, false /fTakeUsedLock/);
2834	if (RT_SUCCESS(rc))
2835	{
2836	if (idCpu < pGVM->cCpus)
2837	rc = gvmmR0SchedPokeOne(pGVM, &pGVM->aCpus[idCpu]);
2838	else
2839	rc = VERR_INVALID_CPU_ID;
2840	}
2841	return rc;
2842	}
2843
2844
2845	/**
2846	* Wakes up a set of halted EMT threads so they can service pending request.
2847	*
2848	* @returns VBox status code, no informational stuff.
2849	*
2850	* @param pGVM The global (ring-0) VM structure.
2851	* @param pSleepSet The set of sleepers to wake up.
2852	* @param pPokeSet The set of CPUs to poke.
2853	*/
2854	GVMMR0DECL(int) GVMMR0SchedWakeUpAndPokeCpus(PGVM pGVM, PCVMCPUSET pSleepSet, PCVMCPUSET pPokeSet)
2855	{
2856	AssertPtrReturn(pSleepSet, VERR_INVALID_POINTER);
2857	AssertPtrReturn(pPokeSet, VERR_INVALID_POINTER);
2858	RTNATIVETHREAD hSelf = RTThreadNativeSelf();
2859
2860	/*
2861	* Validate input and take the UsedLock.
2862	*/
2863	PGVMM pGVMM;
2864	int rc = gvmmR0ByGVM(pGVM, &pGVMM, true /* fTakeUsedLock */);
2865	if (RT_SUCCESS(rc))
2866	{
2867	rc = VINF_SUCCESS;
2868	VMCPUID idCpu = pGVM->cCpus;
2869	while (idCpu-- > 0)
2870	{
2871	/* Don't try poke or wake up ourselves. */
2872	if (pGVM->aCpus[idCpu].hEMT == hSelf)
2873	continue;
2874
2875	/* just ignore errors for now. */
2876	if (VMCPUSET_IS_PRESENT(pSleepSet, idCpu))
2877	gvmmR0SchedWakeUpOne(pGVM, &pGVM->aCpus[idCpu]);
2878	else if (VMCPUSET_IS_PRESENT(pPokeSet, idCpu))
2879	gvmmR0SchedPokeOne(pGVM, &pGVM->aCpus[idCpu]);
2880	}
2881
2882	int rc2 = GVMMR0_USED_SHARED_UNLOCK(pGVMM);
2883	AssertRC(rc2);
2884	}
2885
2886	LogFlow(("GVMMR0SchedWakeUpAndPokeCpus: returns %Rrc\n", rc));
2887	return rc;
2888	}
2889
2890
2891	/**
2892	* VMMR0 request wrapper for GVMMR0SchedWakeUpAndPokeCpus.
2893	*
2894	* @returns see GVMMR0SchedWakeUpAndPokeCpus.
2895	* @param pGVM The global (ring-0) VM structure.
2896	* @param pReq Pointer to the request packet.
2897	*/
2898	GVMMR0DECL(int) GVMMR0SchedWakeUpAndPokeCpusReq(PGVM pGVM, PGVMMSCHEDWAKEUPANDPOKECPUSREQ pReq)
2899	{
2900	/*
2901	* Validate input and pass it on.
2902	*/
2903	AssertPtrReturn(pReq, VERR_INVALID_POINTER);
2904	AssertMsgReturn(pReq->Hdr.cbReq == sizeof(pReq), ("%#x != %#x\n", pReq->Hdr.cbReq, sizeof(pReq)), VERR_INVALID_PARAMETER);
2905
2906	return GVMMR0SchedWakeUpAndPokeCpus(pGVM, &pReq->SleepSet, &pReq->PokeSet);
2907	}
2908
2909
2910
2911	/**
2912	* Poll the schedule to see if someone else should get a chance to run.
2913	*
2914	* This is a bit hackish and will not work too well if the machine is
2915	* under heavy load from non-VM processes.
2916	*
2917	* @returns VINF_SUCCESS if not yielded.
2918	* VINF_GVM_YIELDED if an attempt to switch to a different VM task was made.
2919	* @param pGVM The global (ring-0) VM structure.
2920	* @param idCpu The Virtual CPU ID of the calling EMT.
2921	* @param fYield Whether to yield or not.
2922	* This is for when we're spinning in the halt loop.
2923	* @thread EMT(idCpu).
2924	*/
2925	GVMMR0DECL(int) GVMMR0SchedPoll(PGVM pGVM, VMCPUID idCpu, bool fYield)
2926	{
2927	/*
2928	* Validate input.
2929	*/
2930	PGVMM pGVMM;
2931	int rc = gvmmR0ByGVMandEMT(pGVM, idCpu, &pGVMM);
2932	if (RT_SUCCESS(rc))
2933	{
2934	/*
2935	* We currently only implement helping doing wakeups (fYield = false), so don't
2936	* bother taking the lock if gvmmR0SchedDoWakeUps is not going to do anything.
2937	*/
2938	if (!fYield && pGVMM->fDoEarlyWakeUps)
2939	{
2940	rc = GVMMR0_USED_SHARED_LOCK(pGVMM); AssertRC(rc);
2941	pGVM->gvmm.s.StatsSched.cPollCalls++;
2942
2943	Assert(ASMGetFlags() & X86_EFL_IF);
2944	const uint64_t u64Now = RTTimeNanoTS(); /* (GIP time) */
2945
2946	pGVM->gvmm.s.StatsSched.cPollWakeUps += gvmmR0SchedDoWakeUps(pGVMM, u64Now);
2947
2948	GVMMR0_USED_SHARED_UNLOCK(pGVMM);
2949	}
2950	/*
2951	* Not quite sure what we could do here...
2952	*/
2953	else if (fYield)
2954	rc = VERR_NOT_IMPLEMENTED; /** @todo implement this... */
2955	else
2956	rc = VINF_SUCCESS;
2957	}
2958
2959	LogFlow(("GVMMR0SchedWakeUp: returns %Rrc\n", rc));
2960	return rc;
2961	}
2962
2963
2964	#ifdef GVMM_SCHED_WITH_PPT
2965	/**
2966	* Timer callback for the periodic preemption timer.
2967	*
2968	* @param pTimer The timer handle.
2969	* @param pvUser Pointer to the per cpu structure.
2970	* @param iTick The current tick.
2971	*/
2972	static DECLCALLBACK(void) gvmmR0SchedPeriodicPreemptionTimerCallback(PRTTIMER pTimer, void *pvUser, uint64_t iTick)
2973	{
2974	PGVMMHOSTCPU pCpu = (PGVMMHOSTCPU)pvUser;
2975	NOREF(pTimer); NOREF(iTick);
2976
2977	/*
2978	* Termination check
2979	*/
2980	if (pCpu->u32Magic != GVMMHOSTCPU_MAGIC)
2981	return;
2982
2983	/*
2984	* Do the house keeping.
2985	*/
2986	RTSpinlockAcquire(pCpu->Ppt.hSpinlock);
2987
2988	if (++pCpu->Ppt.iTickHistorization >= pCpu->Ppt.cTicksHistoriziationInterval)
2989	{
2990	/*
2991	* Historicize the max frequency.
2992	*/
2993	uint32_t iHzHistory = ++pCpu->Ppt.iHzHistory % RT_ELEMENTS(pCpu->Ppt.aHzHistory);
2994	pCpu->Ppt.aHzHistory[iHzHistory] = pCpu->Ppt.uDesiredHz;
2995	pCpu->Ppt.iTickHistorization = 0;
2996	pCpu->Ppt.uDesiredHz = 0;
2997
2998	/*
2999	* Check if the current timer frequency.
3000	*/
3001	uint32_t uHistMaxHz = 0;
3002	for (uint32_t i = 0; i < RT_ELEMENTS(pCpu->Ppt.aHzHistory); i++)
3003	if (pCpu->Ppt.aHzHistory[i] > uHistMaxHz)
3004	uHistMaxHz = pCpu->Ppt.aHzHistory[i];
3005	if (uHistMaxHz == pCpu->Ppt.uTimerHz)
3006	RTSpinlockRelease(pCpu->Ppt.hSpinlock);
3007	else if (uHistMaxHz)
3008	{
3009	/*
3010	* Reprogram it.
3011	*/
3012	pCpu->Ppt.cChanges++;
3013	pCpu->Ppt.iTickHistorization = 0;
3014	pCpu->Ppt.uTimerHz = uHistMaxHz;
3015	uint32_t const cNsInterval = RT_NS_1SEC / uHistMaxHz;
3016	pCpu->Ppt.cNsInterval = cNsInterval;
3017	if (cNsInterval < GVMMHOSTCPU_PPT_HIST_INTERVAL_NS)
3018	pCpu->Ppt.cTicksHistoriziationInterval = ( GVMMHOSTCPU_PPT_HIST_INTERVAL_NS
3019	+ GVMMHOSTCPU_PPT_HIST_INTERVAL_NS / 2 - 1)
3020	/ cNsInterval;
3021	else
3022	pCpu->Ppt.cTicksHistoriziationInterval = 1;
3023	RTSpinlockRelease(pCpu->Ppt.hSpinlock);
3024
3025	/SUPR0Printf("Cpu%u: change to %u Hz / %u ns\n", pCpu->idxCpuSet, uHistMaxHz, cNsInterval);/
3026	RTTimerChangeInterval(pTimer, cNsInterval);
3027	}
3028	else
3029	{
3030	/*
3031	* Stop it.
3032	*/
3033	pCpu->Ppt.fStarted = false;
3034	pCpu->Ppt.uTimerHz = 0;
3035	pCpu->Ppt.cNsInterval = 0;
3036	RTSpinlockRelease(pCpu->Ppt.hSpinlock);
3037
3038	/SUPR0Printf("Cpu%u: stopping (%u Hz)\n", pCpu->idxCpuSet, uHistMaxHz);/
3039	RTTimerStop(pTimer);
3040	}
3041	}
3042	else
3043	RTSpinlockRelease(pCpu->Ppt.hSpinlock);
3044	}
3045	#endif /* GVMM_SCHED_WITH_PPT */
3046
3047
3048	/**
3049	* Updates the periodic preemption timer for the calling CPU.
3050	*
3051	* The caller must have disabled preemption!
3052	* The caller must check that the host can do high resolution timers.
3053	*
3054	* @param pGVM The global (ring-0) VM structure.
3055	* @param idHostCpu The current host CPU id.
3056	* @param uHz The desired frequency.
3057	*/
3058	GVMMR0DECL(void) GVMMR0SchedUpdatePeriodicPreemptionTimer(PGVM pGVM, RTCPUID idHostCpu, uint32_t uHz)
3059	{
3060	NOREF(pGVM);
3061	#ifdef GVMM_SCHED_WITH_PPT
3062	Assert(!RTThreadPreemptIsEnabled(NIL_RTTHREAD));
3063	Assert(RTTimerCanDoHighResolution());
3064
3065	/*
3066	* Resolve the per CPU data.
3067	*/
3068	uint32_t iCpu = RTMpCpuIdToSetIndex(idHostCpu);
3069	PGVMM pGVMM = g_pGVMM;
3070	if ( !RT_VALID_PTR(pGVMM)
3071	\|\| pGVMM->u32Magic != GVMM_MAGIC)
3072	return;
3073	AssertMsgReturnVoid(iCpu < pGVMM->cHostCpus, ("iCpu=%d cHostCpus=%d\n", iCpu, pGVMM->cHostCpus));
3074	PGVMMHOSTCPU pCpu = &pGVMM->aHostCpus[iCpu];
3075	AssertMsgReturnVoid( pCpu->u32Magic == GVMMHOSTCPU_MAGIC
3076	&& pCpu->idCpu == idHostCpu,
3077	("u32Magic=%#x idCpu=% idHostCpu=%d\n", pCpu->u32Magic, pCpu->idCpu, idHostCpu));
3078
3079	/*
3080	* Check whether we need to do anything about the timer.
3081	* We have to be a little bit careful since we might be race the timer
3082	* callback here.
3083	*/
3084	if (uHz > 16384)
3085	uHz = 16384; /** @todo add a query method for this! */
3086	if (RT_UNLIKELY( uHz > ASMAtomicReadU32(&pCpu->Ppt.uDesiredHz)
3087	&& uHz >= pCpu->Ppt.uMinHz
3088	&& !pCpu->Ppt.fStarting /* solaris paranoia */))
3089	{
3090	RTSpinlockAcquire(pCpu->Ppt.hSpinlock);
3091
3092	pCpu->Ppt.uDesiredHz = uHz;
3093	uint32_t cNsInterval = 0;
3094	if (!pCpu->Ppt.fStarted)
3095	{
3096	pCpu->Ppt.cStarts++;
3097	pCpu->Ppt.fStarted = true;
3098	pCpu->Ppt.fStarting = true;
3099	pCpu->Ppt.iTickHistorization = 0;
3100	pCpu->Ppt.uTimerHz = uHz;
3101	pCpu->Ppt.cNsInterval = cNsInterval = RT_NS_1SEC / uHz;
3102	if (cNsInterval < GVMMHOSTCPU_PPT_HIST_INTERVAL_NS)
3103	pCpu->Ppt.cTicksHistoriziationInterval = ( GVMMHOSTCPU_PPT_HIST_INTERVAL_NS
3104	+ GVMMHOSTCPU_PPT_HIST_INTERVAL_NS / 2 - 1)
3105	/ cNsInterval;
3106	else
3107	pCpu->Ppt.cTicksHistoriziationInterval = 1;
3108	}
3109
3110	RTSpinlockRelease(pCpu->Ppt.hSpinlock);
3111
3112	if (cNsInterval)
3113	{
3114	RTTimerChangeInterval(pCpu->Ppt.pTimer, cNsInterval);
3115	int rc = RTTimerStart(pCpu->Ppt.pTimer, cNsInterval);
3116	AssertRC(rc);
3117
3118	RTSpinlockAcquire(pCpu->Ppt.hSpinlock);
3119	if (RT_FAILURE(rc))
3120	pCpu->Ppt.fStarted = false;
3121	pCpu->Ppt.fStarting = false;
3122	RTSpinlockRelease(pCpu->Ppt.hSpinlock);
3123	}
3124	}
3125	#else /* !GVMM_SCHED_WITH_PPT */
3126	NOREF(idHostCpu); NOREF(uHz);
3127	#endif /* !GVMM_SCHED_WITH_PPT */
3128	}
3129
3130
3131	/**
3132	* Calls @a pfnCallback for each VM in the system.
3133	*
3134	* This will enumerate the VMs while holding the global VM used list lock in
3135	* shared mode. So, only suitable for simple work. If more expensive work
3136	* needs doing, a different approach must be taken as using this API would
3137	* otherwise block VM creation and destruction.
3138	*
3139	* @returns VBox status code.
3140	* @param pfnCallback The callback function.
3141	* @param pvUser User argument to the callback.
3142	*/
3143	GVMMR0DECL(int) GVMMR0EnumVMs(PFNGVMMR0ENUMCALLBACK pfnCallback, void *pvUser)
3144	{
3145	PGVMM pGVMM;
3146	GVMM_GET_VALID_INSTANCE(pGVMM, VERR_GVMM_INSTANCE);
3147
3148	int rc = VINF_SUCCESS;
3149	GVMMR0_USED_SHARED_LOCK(pGVMM);
3150	for (unsigned i = pGVMM->iUsedHead, cLoops = 0;
3151	i != NIL_GVM_HANDLE && i < RT_ELEMENTS(pGVMM->aHandles);
3152	i = pGVMM->aHandles[i].iNext, cLoops++)
3153	{
3154	PGVM pGVM = pGVMM->aHandles[i].pGVM;
3155	if ( RT_VALID_PTR(pGVM)
3156	&& RT_VALID_PTR(pGVMM->aHandles[i].pvObj)
3157	&& pGVM->u32Magic == GVM_MAGIC)
3158	{
3159	rc = pfnCallback(pGVM, pvUser);
3160	if (rc != VINF_SUCCESS)
3161	break;
3162	}
3163
3164	AssertBreak(cLoops < RT_ELEMENTS(pGVMM->aHandles) * 4); /* paranoia */
3165	}
3166	GVMMR0_USED_SHARED_UNLOCK(pGVMM);
3167	return rc;
3168	}
3169
3170
3171	/**
3172	* Retrieves the GVMM statistics visible to the caller.
3173	*
3174	* @returns VBox status code.
3175	*
3176	* @param pStats Where to put the statistics.
3177	* @param pSession The current session.
3178	* @param pGVM The GVM to obtain statistics for. Optional.
3179	*/
3180	GVMMR0DECL(int) GVMMR0QueryStatistics(PGVMMSTATS pStats, PSUPDRVSESSION pSession, PGVM pGVM)
3181	{
3182	LogFlow(("GVMMR0QueryStatistics: pStats=%p pSession=%p pGVM=%p\n", pStats, pSession, pGVM));
3183
3184	/*
3185	* Validate input.
3186	*/
3187	AssertPtrReturn(pSession, VERR_INVALID_POINTER);
3188	AssertPtrReturn(pStats, VERR_INVALID_POINTER);
3189	pStats->cVMs = 0; /* (crash before taking the sem...) */
3190
3191	/*
3192	* Take the lock and get the VM statistics.
3193	*/
3194	PGVMM pGVMM;
3195	if (pGVM)
3196	{
3197	int rc = gvmmR0ByGVM(pGVM, &pGVMM, true /fTakeUsedLock/);
3198	if (RT_FAILURE(rc))
3199	return rc;
3200	pStats->SchedVM = pGVM->gvmm.s.StatsSched;
3201
3202	uint32_t iCpu = RT_MIN(pGVM->cCpus, RT_ELEMENTS(pStats->aVCpus));
3203	if (iCpu < RT_ELEMENTS(pStats->aVCpus))
3204	RT_BZERO(&pStats->aVCpus[iCpu], (RT_ELEMENTS(pStats->aVCpus) - iCpu) * sizeof(pStats->aVCpus[0]));
3205	while (iCpu-- > 0)
3206	pStats->aVCpus[iCpu] = pGVM->aCpus[iCpu].gvmm.s.Stats;
3207	}
3208	else
3209	{
3210	GVMM_GET_VALID_INSTANCE(pGVMM, VERR_GVMM_INSTANCE);
3211	RT_ZERO(pStats->SchedVM);
3212	RT_ZERO(pStats->aVCpus);
3213
3214	int rc = GVMMR0_USED_SHARED_LOCK(pGVMM);
3215	AssertRCReturn(rc, rc);
3216	}
3217
3218	/*
3219	* Enumerate the VMs and add the ones visible to the statistics.
3220	*/
3221	pStats->cVMs = 0;
3222	pStats->cEMTs = 0;
3223	memset(&pStats->SchedSum, 0, sizeof(pStats->SchedSum));
3224
3225	for (unsigned i = pGVMM->iUsedHead;
3226	i != NIL_GVM_HANDLE && i < RT_ELEMENTS(pGVMM->aHandles);
3227	i = pGVMM->aHandles[i].iNext)
3228	{
3229	PGVM pOtherGVM = pGVMM->aHandles[i].pGVM;
3230	void *pvObj = pGVMM->aHandles[i].pvObj;
3231	if ( RT_VALID_PTR(pvObj)
3232	&& RT_VALID_PTR(pOtherGVM)
3233	&& pOtherGVM->u32Magic == GVM_MAGIC
3234	&& RT_SUCCESS(SUPR0ObjVerifyAccess(pvObj, pSession, NULL)))
3235	{
3236	pStats->cVMs++;
3237	pStats->cEMTs += pOtherGVM->cCpus;
3238
3239	pStats->SchedSum.cHaltCalls += pOtherGVM->gvmm.s.StatsSched.cHaltCalls;
3240	pStats->SchedSum.cHaltBlocking += pOtherGVM->gvmm.s.StatsSched.cHaltBlocking;
3241	pStats->SchedSum.cHaltTimeouts += pOtherGVM->gvmm.s.StatsSched.cHaltTimeouts;
3242	pStats->SchedSum.cHaltNotBlocking += pOtherGVM->gvmm.s.StatsSched.cHaltNotBlocking;
3243	pStats->SchedSum.cHaltWakeUps += pOtherGVM->gvmm.s.StatsSched.cHaltWakeUps;
3244
3245	pStats->SchedSum.cWakeUpCalls += pOtherGVM->gvmm.s.StatsSched.cWakeUpCalls;
3246	pStats->SchedSum.cWakeUpNotHalted += pOtherGVM->gvmm.s.StatsSched.cWakeUpNotHalted;
3247	pStats->SchedSum.cWakeUpWakeUps += pOtherGVM->gvmm.s.StatsSched.cWakeUpWakeUps;
3248
3249	pStats->SchedSum.cPokeCalls += pOtherGVM->gvmm.s.StatsSched.cPokeCalls;
3250	pStats->SchedSum.cPokeNotBusy += pOtherGVM->gvmm.s.StatsSched.cPokeNotBusy;
3251
3252	pStats->SchedSum.cPollCalls += pOtherGVM->gvmm.s.StatsSched.cPollCalls;
3253	pStats->SchedSum.cPollHalts += pOtherGVM->gvmm.s.StatsSched.cPollHalts;
3254	pStats->SchedSum.cPollWakeUps += pOtherGVM->gvmm.s.StatsSched.cPollWakeUps;
3255	}
3256	}
3257
3258	/*
3259	* Copy out the per host CPU statistics.
3260	*/
3261	uint32_t iDstCpu = 0;
3262	uint32_t cSrcCpus = pGVMM->cHostCpus;
3263	for (uint32_t iSrcCpu = 0; iSrcCpu < cSrcCpus; iSrcCpu++)
3264	{
3265	if (pGVMM->aHostCpus[iSrcCpu].idCpu != NIL_RTCPUID)
3266	{
3267	pStats->aHostCpus[iDstCpu].idCpu = pGVMM->aHostCpus[iSrcCpu].idCpu;
3268	pStats->aHostCpus[iDstCpu].idxCpuSet = pGVMM->aHostCpus[iSrcCpu].idxCpuSet;
3269	#ifdef GVMM_SCHED_WITH_PPT
3270	pStats->aHostCpus[iDstCpu].uDesiredHz = pGVMM->aHostCpus[iSrcCpu].Ppt.uDesiredHz;
3271	pStats->aHostCpus[iDstCpu].uTimerHz = pGVMM->aHostCpus[iSrcCpu].Ppt.uTimerHz;
3272	pStats->aHostCpus[iDstCpu].cChanges = pGVMM->aHostCpus[iSrcCpu].Ppt.cChanges;
3273	pStats->aHostCpus[iDstCpu].cStarts = pGVMM->aHostCpus[iSrcCpu].Ppt.cStarts;
3274	#else
3275	pStats->aHostCpus[iDstCpu].uDesiredHz = 0;
3276	pStats->aHostCpus[iDstCpu].uTimerHz = 0;
3277	pStats->aHostCpus[iDstCpu].cChanges = 0;
3278	pStats->aHostCpus[iDstCpu].cStarts = 0;
3279	#endif
3280	iDstCpu++;
3281	if (iDstCpu >= RT_ELEMENTS(pStats->aHostCpus))
3282	break;
3283	}
3284	}
3285	pStats->cHostCpus = iDstCpu;
3286
3287	GVMMR0_USED_SHARED_UNLOCK(pGVMM);
3288
3289	return VINF_SUCCESS;
3290	}
3291
3292
3293	/**
3294	* VMMR0 request wrapper for GVMMR0QueryStatistics.
3295	*
3296	* @returns see GVMMR0QueryStatistics.
3297	* @param pGVM The global (ring-0) VM structure. Optional.
3298	* @param pReq Pointer to the request packet.
3299	* @param pSession The current session.
3300	*/
3301	GVMMR0DECL(int) GVMMR0QueryStatisticsReq(PGVM pGVM, PGVMMQUERYSTATISTICSSREQ pReq, PSUPDRVSESSION pSession)
3302	{
3303	/*
3304	* Validate input and pass it on.
3305	*/
3306	AssertPtrReturn(pReq, VERR_INVALID_POINTER);
3307	AssertMsgReturn(pReq->Hdr.cbReq == sizeof(pReq), ("%#x != %#x\n", pReq->Hdr.cbReq, sizeof(pReq)), VERR_INVALID_PARAMETER);
3308	AssertReturn(pReq->pSession == pSession, VERR_INVALID_PARAMETER);
3309
3310	return GVMMR0QueryStatistics(&pReq->Stats, pSession, pGVM);
3311	}
3312
3313
3314	/**
3315	* Resets the specified GVMM statistics.
3316	*
3317	* @returns VBox status code.
3318	*
3319	* @param pStats Which statistics to reset, that is, non-zero fields indicates which to reset.
3320	* @param pSession The current session.
3321	* @param pGVM The GVM to reset statistics for. Optional.
3322	*/
3323	GVMMR0DECL(int) GVMMR0ResetStatistics(PCGVMMSTATS pStats, PSUPDRVSESSION pSession, PGVM pGVM)
3324	{
3325	LogFlow(("GVMMR0ResetStatistics: pStats=%p pSession=%p pGVM=%p\n", pStats, pSession, pGVM));
3326
3327	/*
3328	* Validate input.
3329	*/
3330	AssertPtrReturn(pSession, VERR_INVALID_POINTER);
3331	AssertPtrReturn(pStats, VERR_INVALID_POINTER);
3332
3333	/*
3334	* Take the lock and get the VM statistics.
3335	*/
3336	PGVMM pGVMM;
3337	if (pGVM)
3338	{
3339	int rc = gvmmR0ByGVM(pGVM, &pGVMM, true /fTakeUsedLock/);
3340	if (RT_FAILURE(rc))
3341	return rc;
3342	# define MAYBE_RESET_FIELD(field) \
3343	do { if (pStats->SchedVM. field ) { pGVM->gvmm.s.StatsSched. field = 0; } } while (0)
3344	MAYBE_RESET_FIELD(cHaltCalls);
3345	MAYBE_RESET_FIELD(cHaltBlocking);
3346	MAYBE_RESET_FIELD(cHaltTimeouts);
3347	MAYBE_RESET_FIELD(cHaltNotBlocking);
3348	MAYBE_RESET_FIELD(cHaltWakeUps);
3349	MAYBE_RESET_FIELD(cWakeUpCalls);
3350	MAYBE_RESET_FIELD(cWakeUpNotHalted);
3351	MAYBE_RESET_FIELD(cWakeUpWakeUps);
3352	MAYBE_RESET_FIELD(cPokeCalls);
3353	MAYBE_RESET_FIELD(cPokeNotBusy);
3354	MAYBE_RESET_FIELD(cPollCalls);
3355	MAYBE_RESET_FIELD(cPollHalts);
3356	MAYBE_RESET_FIELD(cPollWakeUps);
3357	# undef MAYBE_RESET_FIELD
3358	}
3359	else
3360	{
3361	GVMM_GET_VALID_INSTANCE(pGVMM, VERR_GVMM_INSTANCE);
3362
3363	int rc = GVMMR0_USED_SHARED_LOCK(pGVMM);
3364	AssertRCReturn(rc, rc);
3365	}
3366
3367	/*
3368	* Enumerate the VMs and add the ones visible to the statistics.
3369	*/
3370	if (!ASMMemIsZero(&pStats->SchedSum, sizeof(pStats->SchedSum)))
3371	{
3372	for (unsigned i = pGVMM->iUsedHead;
3373	i != NIL_GVM_HANDLE && i < RT_ELEMENTS(pGVMM->aHandles);
3374	i = pGVMM->aHandles[i].iNext)
3375	{
3376	PGVM pOtherGVM = pGVMM->aHandles[i].pGVM;
3377	void *pvObj = pGVMM->aHandles[i].pvObj;
3378	if ( RT_VALID_PTR(pvObj)
3379	&& RT_VALID_PTR(pOtherGVM)
3380	&& pOtherGVM->u32Magic == GVM_MAGIC
3381	&& RT_SUCCESS(SUPR0ObjVerifyAccess(pvObj, pSession, NULL)))
3382	{
3383	# define MAYBE_RESET_FIELD(field) \
3384	do { if (pStats->SchedSum. field ) { pOtherGVM->gvmm.s.StatsSched. field = 0; } } while (0)
3385	MAYBE_RESET_FIELD(cHaltCalls);
3386	MAYBE_RESET_FIELD(cHaltBlocking);
3387	MAYBE_RESET_FIELD(cHaltTimeouts);
3388	MAYBE_RESET_FIELD(cHaltNotBlocking);
3389	MAYBE_RESET_FIELD(cHaltWakeUps);
3390	MAYBE_RESET_FIELD(cWakeUpCalls);
3391	MAYBE_RESET_FIELD(cWakeUpNotHalted);
3392	MAYBE_RESET_FIELD(cWakeUpWakeUps);
3393	MAYBE_RESET_FIELD(cPokeCalls);
3394	MAYBE_RESET_FIELD(cPokeNotBusy);
3395	MAYBE_RESET_FIELD(cPollCalls);
3396	MAYBE_RESET_FIELD(cPollHalts);
3397	MAYBE_RESET_FIELD(cPollWakeUps);
3398	# undef MAYBE_RESET_FIELD
3399	}
3400	}
3401	}
3402
3403	GVMMR0_USED_SHARED_UNLOCK(pGVMM);
3404
3405	return VINF_SUCCESS;
3406	}
3407
3408
3409	/**
3410	* VMMR0 request wrapper for GVMMR0ResetStatistics.
3411	*
3412	* @returns see GVMMR0ResetStatistics.
3413	* @param pGVM The global (ring-0) VM structure. Optional.
3414	* @param pReq Pointer to the request packet.
3415	* @param pSession The current session.
3416	*/
3417	GVMMR0DECL(int) GVMMR0ResetStatisticsReq(PGVM pGVM, PGVMMRESETSTATISTICSSREQ pReq, PSUPDRVSESSION pSession)
3418	{
3419	/*
3420	* Validate input and pass it on.
3421	*/
3422	AssertPtrReturn(pReq, VERR_INVALID_POINTER);
3423	AssertMsgReturn(pReq->Hdr.cbReq == sizeof(pReq), ("%#x != %#x\n", pReq->Hdr.cbReq, sizeof(pReq)), VERR_INVALID_PARAMETER);
3424	AssertReturn(pReq->pSession == pSession, VERR_INVALID_PARAMETER);
3425
3426	return GVMMR0ResetStatistics(&pReq->Stats, pSession, pGVM);
3427	}
3428

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source: vbox/trunk/src/VBox/VMM/VMMR0/GVMMR0.cpp@ 95248

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