VBoxServiceCpuHotPlug.cpp@ 59001

Last change on this file since 59001 was 58054, checked in by vboxsync, 9 years ago
VBoxService: page fix
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1	/* $Id: VBoxServiceCpuHotPlug.cpp 58054 2015-10-06 14:46:54Z vboxsync $ */
2	/** @file
3	* VBoxService - Guest Additions CPU Hot-Plugging Service.
4	*/
5
6	/*
7	* Copyright (C) 2010-2015 Oracle Corporation
8	*
9	* This file is part of VirtualBox Open Source Edition (OSE), as
10	* available from http://www.virtualbox.org. This file is free software;
11	* you can redistribute it and/or modify it under the terms of the GNU
12	* General Public License (GPL) as published by the Free Software
13	* Foundation, in version 2 as it comes in the "COPYING" file of the
14	* VirtualBox OSE distribution. VirtualBox OSE is distributed in the
15	* hope that it will be useful, but WITHOUT ANY WARRANTY of any kind.
16	*/
17
18	/** @page pg_vgsvc_cpuhotplug VBoxService - CPU Hot-Plugging
19	*
20	* The CPU Hot-Plugging subservice helps execute and coordinate CPU hot-plugging
21	* between the guest OS and the VMM.
22	*
23	* CPU Hot-Plugging is useful for reallocating CPU resources from one VM to
24	* other VMs or/and the host. It talks to the VMM via VMMDev, new hot-plugging
25	* events being signalled with an interrupt (no polling).
26	*
27	* Currently only supported for linux guests.
28	*/
29
30	/*********************************************************************************************************************************
31	* Header Files *
32	*********************************************************************************************************************************/
33	#include <iprt/assert.h>
34	#include <iprt/dir.h>
35	#include <iprt/file.h>
36	#include <iprt/mem.h>
37	#include <iprt/path.h>
38	#include <iprt/string.h>
39	#include <iprt/thread.h>
40	#include <VBox/VBoxGuestLib.h>
41	#include "VBoxServiceInternal.h"
42
43	#ifdef RT_OS_LINUX
44	# include <iprt/linux/sysfs.h>
45	# include <errno.h> /* For the sysfs API */
46	#endif
47
48
49	/*********************************************************************************************************************************
50	* Defined Constants And Macros *
51	*********************************************************************************************************************************/
52	#ifdef RT_OS_LINUX
53
54	/** @name Paths to access the CPU device
55	* @{
56	*/
57	# define SYSFS_ACPI_CPU_PATH "/sys/devices"
58	# define SYSFS_CPU_PATH "/sys/devices/system/cpu"
59	/** @} */
60
61	/** Path component for the ACPI CPU path. */
62	typedef struct SYSFSCPUPATHCOMP
63	{
64	/** Flag whether the name is suffixed with a number */
65	bool fNumberedSuffix;
66	/** Name of the component */
67	const char *pcszName;
68	} SYSFSCPUPATHCOMP, *PSYSFSCPUPATHCOMP;
69	/** Pointer to a const component. */
70	typedef const SYSFSCPUPATHCOMP *PCSYSFSCPUPATHCOMP;
71
72	/**
73	* Structure which defines how the entries are assembled.
74	*/
75	typedef struct SYSFSCPUPATH
76	{
77	/** Id when probing for the correct path. */
78	uint32_t uId;
79	/** Array holding the possible components. */
80	PCSYSFSCPUPATHCOMP aComponentsPossible;
81	/** Number of entries in the array, excluding the terminator. */
82	unsigned cComponents;
83	/** Directory handle */
84	PRTDIR pDir;
85	/** Current directory to try. */
86	char *pszPath;
87	} SYSFSCPUPATH, *PSYSFSCPUPATH;
88
89	/** Content of uId if the path wasn't probed yet. */
90	# define ACPI_CPU_PATH_NOT_PROBED UINT32_MAX
91	#endif /* RT_OS_LINUX*/
92
93
94	/*********************************************************************************************************************************
95	* Global Variables *
96	*********************************************************************************************************************************/
97	#ifdef RT_OS_LINUX
98	/** Possible combinations of all path components for level 1. */
99	static const SYSFSCPUPATHCOMP g_aAcpiCpuPathLvl1[] =
100	{
101	/** LNXSYSTEM:<id> */
102	{ true, "LNXSYSTM:*" }
103	};
104
105	/** Possible combinations of all path components for level 2. */
106	static const SYSFSCPUPATHCOMP g_aAcpiCpuPathLvl2[] =
107	{
108	/** device:<id> */
109	{ true, "device:*" },
110	/** LNXSYBUS:<id> */
111	{ true, "LNXSYBUS:*" }
112	};
113
114	/** Possible combinations of all path components for level 3 */
115	static const SYSFSCPUPATHCOMP g_aAcpiCpuPathLvl3[] =
116	{
117	/** ACPI0004:<id> */
118	{ true, "ACPI0004:*" }
119	};
120
121	/** Possible combinations of all path components for level 4 */
122	static const SYSFSCPUPATHCOMP g_aAcpiCpuPathLvl4[] =
123	{
124	/** LNXCPU:<id> */
125	{ true, "LNXCPU:*" },
126	/** ACPI_CPU:<id> */
127	{ true, "ACPI_CPU:*" }
128	};
129
130	/** All possible combinations. */
131	static SYSFSCPUPATH g_aAcpiCpuPath[] =
132	{
133	/** Level 1 */
134	{ ACPI_CPU_PATH_NOT_PROBED, g_aAcpiCpuPathLvl1, RT_ELEMENTS(g_aAcpiCpuPathLvl1), NULL, NULL },
135	/** Level 2 */
136	{ ACPI_CPU_PATH_NOT_PROBED, g_aAcpiCpuPathLvl2, RT_ELEMENTS(g_aAcpiCpuPathLvl2), NULL, NULL },
137	/** Level 3 */
138	{ ACPI_CPU_PATH_NOT_PROBED, g_aAcpiCpuPathLvl3, RT_ELEMENTS(g_aAcpiCpuPathLvl3), NULL, NULL },
139	/** Level 4 */
140	{ ACPI_CPU_PATH_NOT_PROBED, g_aAcpiCpuPathLvl4, RT_ELEMENTS(g_aAcpiCpuPathLvl4), NULL, NULL },
141	};
142
143	/**
144	* Possible directories to get to the topology directory for reading core and package id.
145	*
146	* @remark: This is not part of the path above because the eject file is not in one of the directories
147	* below and would make the hot unplug code fail.
148	*/
149	static const char *g_apszTopologyPath[] =
150	{
151	"sysdev",
152	"physical_node"
153	};
154
155	#endif /* RT_OS_LINUX*/
156
157
158	#ifdef RT_OS_LINUX
159
160	/**
161	* Probes for the correct path to the ACPI CPU object in sysfs for the
162	* various different kernel versions and distro's.
163	*
164	* @returns VBox status code.
165	*/
166	static int vgsvcCpuHotPlugProbePath(void)
167	{
168	int rc = VINF_SUCCESS;
169
170	/* Probe for the correct path if we didn't already. */
171	if (RT_UNLIKELY(g_aAcpiCpuPath[0].uId == ACPI_CPU_PATH_NOT_PROBED))
172	{
173	char pszPath = NULL; /* < Current path, increasing while we dig deeper. */
174
175	pszPath = RTStrDup(SYSFS_ACPI_CPU_PATH);
176	if (!pszPath)
177	return VERR_NO_MEMORY;
178
179	/*
180	* Simple algorithm to find the path.
181	* Performance is not a real problem because it is
182	* only executed once.
183	*/
184	for (unsigned iLvlCurr = 0; iLvlCurr < RT_ELEMENTS(g_aAcpiCpuPath); iLvlCurr++)
185	{
186	PSYSFSCPUPATH pAcpiCpuPathLvl = &g_aAcpiCpuPath[iLvlCurr];
187
188	for (unsigned iCompCurr = 0; iCompCurr < pAcpiCpuPathLvl->cComponents; iCompCurr++)
189	{
190	PCSYSFSCPUPATHCOMP pPathComponent = &pAcpiCpuPathLvl->aComponentsPossible[iCompCurr];
191
192	/* Open the directory */
193	PRTDIR pDirCurr = NULL;
194	char *pszPathTmp = RTPathJoinA(pszPath, pPathComponent->pcszName);
195	if (pszPathTmp)
196	{
197	rc = RTDirOpenFiltered(&pDirCurr, pszPathTmp, RTDIRFILTER_WINNT, 0);
198	RTStrFree(pszPathTmp);
199	}
200	else
201	rc = VERR_NO_STR_MEMORY;
202	if (RT_FAILURE(rc))
203	break;
204
205	/* Search if the current directory contains one of the possible parts. */
206	size_t cchName = strlen(pPathComponent->pcszName);
207	RTDIRENTRY DirFolderContent;
208	bool fFound = false;
209
210	/* Get rid of the * filter which is in the path component. */
211	if (pPathComponent->fNumberedSuffix)
212	cchName--;
213
214	while (RT_SUCCESS(RTDirRead(pDirCurr, &DirFolderContent, NULL))) /* Assumption that szName has always enough space */
215	{
216	if ( DirFolderContent.cbName >= cchName
217	&& !strncmp(DirFolderContent.szName, pPathComponent->pcszName, cchName))
218	{
219	/* Found, use the complete name to dig deeper. */
220	fFound = true;
221	pAcpiCpuPathLvl->uId = iCompCurr;
222	char *pszPathLvl = RTPathJoinA(pszPath, DirFolderContent.szName);
223	if (pszPathLvl)
224	{
225	RTStrFree(pszPath);
226	pszPath = pszPathLvl;
227	}
228	else
229	rc = VERR_NO_STR_MEMORY;
230	break;
231	}
232	}
233	RTDirClose(pDirCurr);
234
235	if (fFound)
236	break;
237	} /* For every possible component. */
238
239	/* No matching component for this part, no need to continue */
240	if (RT_FAILURE(rc))
241	break;
242	} /* For every level */
243
244	VGSvcVerbose(1, "Final path after probing %s rc=%Rrc\n", pszPath, rc);
245	RTStrFree(pszPath);
246	}
247
248	return rc;
249	}
250
251
252	/**
253	* Returns the path of the ACPI CPU device with the given core and package ID.
254	*
255	* @returns VBox status code.
256	* @param ppszPath Where to store the path.
257	* @param idCpuCore The core ID of the CPU.
258	* @param idCpuPackage The package ID of the CPU.
259	*/
260	static int vgsvcCpuHotPlugGetACPIDevicePath(char **ppszPath, uint32_t idCpuCore, uint32_t idCpuPackage)
261	{
262	int rc = VINF_SUCCESS;
263
264	AssertPtrReturn(ppszPath, VERR_INVALID_PARAMETER);
265
266	rc = vgsvcCpuHotPlugProbePath();
267	if (RT_SUCCESS(rc))
268	{
269	/* Build the path from all components. */
270	bool fFound = false;
271	unsigned iLvlCurr = 0;
272	char *pszPath = NULL;
273	char *pszPathDir = NULL;
274	PSYSFSCPUPATH pAcpiCpuPathLvl = &g_aAcpiCpuPath[iLvlCurr];
275
276	/* Init everything. */
277	Assert(pAcpiCpuPathLvl->uId != ACPI_CPU_PATH_NOT_PROBED);
278	pszPath = RTPathJoinA(SYSFS_ACPI_CPU_PATH, pAcpiCpuPathLvl->aComponentsPossible[pAcpiCpuPathLvl->uId].pcszName);
279	if (!pszPath)
280	return VERR_NO_STR_MEMORY;
281
282	pAcpiCpuPathLvl->pszPath = RTStrDup(SYSFS_ACPI_CPU_PATH);
283	if (!pAcpiCpuPathLvl->pszPath)
284	{
285	RTStrFree(pszPath);
286	return VERR_NO_STR_MEMORY;
287	}
288
289	/* Open the directory */
290	rc = RTDirOpenFiltered(&pAcpiCpuPathLvl->pDir, pszPath, RTDIRFILTER_WINNT, 0);
291	if (RT_SUCCESS(rc))
292	{
293	RTStrFree(pszPath);
294
295	/* Search for CPU */
296	while (!fFound)
297	{
298	/* Get the next directory. */
299	RTDIRENTRY DirFolderContent;
300	rc = RTDirRead(pAcpiCpuPathLvl->pDir, &DirFolderContent, NULL);
301	if (RT_SUCCESS(rc))
302	{
303	/* Create the new path. */
304	char *pszPathCurr = RTPathJoinA(pAcpiCpuPathLvl->pszPath, DirFolderContent.szName);
305	if (!pszPathCurr)
306	{
307	rc = VERR_NO_STR_MEMORY;
308	break;
309	}
310
311	/* If this is the last level check for the given core and package id. */
312	if (iLvlCurr == RT_ELEMENTS(g_aAcpiCpuPath) - 1)
313	{
314	/* Get the sysdev */
315	uint32_t idCore = 0;
316	uint32_t idPackage = 0;
317
318	for (unsigned i = 0; i < RT_ELEMENTS(g_apszTopologyPath); i++)
319	{
320	int64_t i64Core = RTLinuxSysFsReadIntFile(10, "%s/%s/topology/core_id",
321	pszPathCurr, g_apszTopologyPath[i]);
322	int64_t i64Package = RTLinuxSysFsReadIntFile(10, "%s/%s/topology/physical_package_id",
323	pszPathCurr, g_apszTopologyPath[i]);
324
325	if ( i64Core != -1
326	&& i64Package != -1)
327	{
328	idCore = (uint32_t)i64Core;
329	idPackage = (uint32_t)i64Package;
330	break;
331	}
332	}
333
334	if ( idCore == idCpuCore
335	&& idPackage == idCpuPackage)
336	{
337	/* Return the path */
338	pszPath = pszPathCurr;
339	fFound = true;
340	VGSvcVerbose(3, "CPU found\n");
341	break;
342	}
343	else
344	{
345	/* Get the next directory. */
346	RTStrFree(pszPathCurr);
347	VGSvcVerbose(3, "CPU doesn't match, next directory\n");
348	}
349	}
350	else
351	{
352	/* Go deeper */
353	iLvlCurr++;
354
355	VGSvcVerbose(3, "Going deeper (iLvlCurr=%u)\n", iLvlCurr);
356
357	pAcpiCpuPathLvl = &g_aAcpiCpuPath[iLvlCurr];
358
359	Assert(!pAcpiCpuPathLvl->pDir);
360	Assert(!pAcpiCpuPathLvl->pszPath);
361	pAcpiCpuPathLvl->pszPath = pszPathCurr;
362	PCSYSFSCPUPATHCOMP pPathComponent = &pAcpiCpuPathLvl->aComponentsPossible[pAcpiCpuPathLvl->uId];
363
364	Assert(pAcpiCpuPathLvl->uId != ACPI_CPU_PATH_NOT_PROBED);
365
366	pszPathDir = RTPathJoinA(pszPathCurr, pPathComponent->pcszName);
367	if (!pszPathDir)
368	{
369	rc = VERR_NO_STR_MEMORY;
370	break;
371	}
372
373	VGSvcVerbose(3, "New path %s\n", pszPathDir);
374
375	/* Open the directory */
376	rc = RTDirOpenFiltered(&pAcpiCpuPathLvl->pDir, pszPathDir, RTDIRFILTER_WINNT, 0);
377	if (RT_FAILURE(rc))
378	break;
379	}
380	}
381	else
382	{
383	/* Go back one level and try to get the next entry. */
384	Assert(iLvlCurr > 0);
385
386	RTDirClose(pAcpiCpuPathLvl->pDir);
387	RTStrFree(pAcpiCpuPathLvl->pszPath);
388	pAcpiCpuPathLvl->pDir = NULL;
389	pAcpiCpuPathLvl->pszPath = NULL;
390
391	iLvlCurr--;
392	pAcpiCpuPathLvl = &g_aAcpiCpuPath[iLvlCurr];
393	VGSvcVerbose(3, "Directory not found, going back (iLvlCurr=%u)\n", iLvlCurr);
394	}
395	} /* while not found */
396	} /* Successful init */
397
398	/* Cleanup */
399	for (unsigned i = 0; i < RT_ELEMENTS(g_aAcpiCpuPath); i++)
400	{
401	if (g_aAcpiCpuPath[i].pDir)
402	RTDirClose(g_aAcpiCpuPath[i].pDir);
403	if (g_aAcpiCpuPath[i].pszPath)
404	RTStrFree(g_aAcpiCpuPath[i].pszPath);
405	g_aAcpiCpuPath[i].pDir = NULL;
406	g_aAcpiCpuPath[i].pszPath = NULL;
407	}
408	if (pszPathDir)
409	RTStrFree(pszPathDir);
410	if (RT_FAILURE(rc) && pszPath)
411	RTStrFree(pszPath);
412
413	if (RT_SUCCESS(rc))
414	*ppszPath = pszPath;
415	}
416
417	return rc;
418	}
419
420	#endif /* RT_OS_LINUX */
421
422	/**
423	* Handles VMMDevCpuEventType_Plug.
424	*
425	* @param idCpuCore The CPU core ID.
426	* @param idCpuPackage The CPU package ID.
427	*/
428	static void vgsvcCpuHotPlugHandlePlugEvent(uint32_t idCpuCore, uint32_t idCpuPackage)
429	{
430	#ifdef RT_OS_LINUX
431	/*
432	* The topology directory (containing the physical and core id properties)
433	* is not available until the CPU is online. So we just iterate over all directories
434	* and enable every CPU which is not online already.
435	* Because the directory might not be available immediately we try a few times.
436	*
437	*/
438	/** @todo Maybe use udev to monitor hot-add events from the kernel */
439	bool fCpuOnline = false;
440	unsigned cTries = 5;
441
442	do
443	{
444	PRTDIR pDirDevices = NULL;
445	int rc = RTDirOpen(&pDirDevices, SYSFS_CPU_PATH);
446	if (RT_SUCCESS(rc))
447	{
448	RTDIRENTRY DirFolderContent;
449	while (RT_SUCCESS(RTDirRead(pDirDevices, &DirFolderContent, NULL))) /* Assumption that szName has always enough space */
450	{
451	/** @todo r-bird: This code is bringing all CPUs online; the idCpuCore and
452	* idCpuPackage parameters are unused!
453	* aeichner: These files are not available at this point unfortunately. (see comment above)
454	* bird: Yes, but isn't that easily dealt with by doing:
455	* if (matching_topology() \|\| !have_topology_directory())
456	* bring_cpu_online()
457	* That could save you the cpu0 and cpuidle checks to.
458	*/
459	/*
460	* Check if this is a CPU object.
461	* cpu0 is excluded because it is not possible to change the state
462	* of the first CPU on Linux (it doesn't even have an online file)
463	* and cpuidle is no CPU device. Prevents error messages later.
464	*/
465	if( !strncmp(DirFolderContent.szName, "cpu", 3)
466	&& strncmp(DirFolderContent.szName, "cpu0", 4)
467	&& strncmp(DirFolderContent.szName, "cpuidle", 7))
468	{
469	/* Get the sysdev */
470	RTFILE hFileCpuOnline = NIL_RTFILE;
471
472	rc = RTFileOpenF(&hFileCpuOnline, RTFILE_O_WRITE \| RTFILE_O_OPEN \| RTFILE_O_DENY_NONE,
473	"%s/%s/online", SYSFS_CPU_PATH, DirFolderContent.szName);
474	if (RT_SUCCESS(rc))
475	{
476	/* Write a 1 to online the CPU */
477	rc = RTFileWrite(hFileCpuOnline, "1", 1, NULL);
478	RTFileClose(hFileCpuOnline);
479	if (RT_SUCCESS(rc))
480	{
481	VGSvcVerbose(1, "CpuHotPlug: CPU %u/%u was brought online\n", idCpuPackage, idCpuCore);
482	fCpuOnline = true;
483	break;
484	}
485	/* Error means CPU not present or online already */
486	}
487	else
488	VGSvcError("CpuHotPlug: Failed to open '%s/%s/online' rc=%Rrc\n",
489	SYSFS_CPU_PATH, DirFolderContent.szName, rc);
490	}
491	}
492	}
493	else
494	VGSvcError("CpuHotPlug: Failed to open path %s rc=%Rrc\n", SYSFS_CPU_PATH, rc);
495
496	/* Sleep a bit */
497	if (!fCpuOnline)
498	RTThreadSleep(10);
499
500	} while ( !fCpuOnline
501	&& cTries-- > 0);
502	#else
503	# error "Port me"
504	#endif
505	}
506
507
508	/**
509	* Handles VMMDevCpuEventType_Unplug.
510	*
511	* @param idCpuCore The CPU core ID.
512	* @param idCpuPackage The CPU package ID.
513	*/
514	static void vgsvcCpuHotPlugHandleUnplugEvent(uint32_t idCpuCore, uint32_t idCpuPackage)
515	{
516	#ifdef RT_OS_LINUX
517	char *pszCpuDevicePath = NULL;
518	int rc = vgsvcCpuHotPlugGetACPIDevicePath(&pszCpuDevicePath, idCpuCore, idCpuPackage);
519	if (RT_SUCCESS(rc))
520	{
521	RTFILE hFileCpuEject;
522	rc = RTFileOpenF(&hFileCpuEject, RTFILE_O_WRITE \| RTFILE_O_OPEN \| RTFILE_O_DENY_NONE, "%s/eject", pszCpuDevicePath);
523	if (RT_SUCCESS(rc))
524	{
525	/* Write a 1 to eject the CPU */
526	rc = RTFileWrite(hFileCpuEject, "1", 1, NULL);
527	if (RT_SUCCESS(rc))
528	VGSvcVerbose(1, "CpuHotPlug: CPU %u/%u was ejected\n", idCpuPackage, idCpuCore);
529	else
530	VGSvcError("CpuHotPlug: Failed to eject CPU %u/%u rc=%Rrc\n", idCpuPackage, idCpuCore, rc);
531
532	RTFileClose(hFileCpuEject);
533	}
534	else
535	VGSvcError("CpuHotPlug: Failed to open '%s/eject' rc=%Rrc\n", pszCpuDevicePath, rc);
536	RTStrFree(pszCpuDevicePath);
537	}
538	else
539	VGSvcError("CpuHotPlug: Failed to get CPU device path rc=%Rrc\n", rc);
540	#else
541	# error "Port me"
542	#endif
543	}
544
545
546	/** @interface_method_impl{VBOXSERVICE,pfnWorker} */
547	static DECLCALLBACK(int) vgsvcCpuHotPlugWorker(bool volatile *pfShutdown)
548	{
549	/*
550	* Tell the control thread that it can continue spawning services.
551	*/
552	RTThreadUserSignal(RTThreadSelf());
553
554	/*
555	* Enable the CPU hotplug notifier.
556	*/
557	int rc = VbglR3CpuHotPlugInit();
558	if (RT_FAILURE(rc))
559	return rc;
560
561	/*
562	* The Work Loop.
563	*/
564	for (;;)
565	{
566	/* Wait for CPU hot-plugging event. */
567	uint32_t idCpuCore;
568	uint32_t idCpuPackage;
569	VMMDevCpuEventType enmEventType;
570	rc = VbglR3CpuHotPlugWaitForEvent(&enmEventType, &idCpuCore, &idCpuPackage);
571	if (RT_SUCCESS(rc))
572	{
573	VGSvcVerbose(3, "CpuHotPlug: Event happened idCpuCore=%u idCpuPackage=%u enmEventType=%d\n",
574	idCpuCore, idCpuPackage, enmEventType);
575	switch (enmEventType)
576	{
577	case VMMDevCpuEventType_Plug:
578	vgsvcCpuHotPlugHandlePlugEvent(idCpuCore, idCpuPackage);
579	break;
580
581	case VMMDevCpuEventType_Unplug:
582	vgsvcCpuHotPlugHandleUnplugEvent(idCpuCore, idCpuPackage);
583	break;
584
585	default:
586	{
587	static uint32_t s_iErrors = 0;
588	if (s_iErrors++ < 10)
589	VGSvcError("CpuHotPlug: Unknown event: idCpuCore=%u idCpuPackage=%u enmEventType=%d\n",
590	idCpuCore, idCpuPackage, enmEventType);
591	break;
592	}
593	}
594	}
595	else if (rc != VERR_INTERRUPTED && rc != VERR_TRY_AGAIN)
596	{
597	VGSvcError("CpuHotPlug: VbglR3CpuHotPlugWaitForEvent returned %Rrc\n", rc);
598	break;
599	}
600
601	if (*pfShutdown)
602	break;
603	}
604
605	VbglR3CpuHotPlugTerm();
606	return rc;
607	}
608
609
610	/** @interface_method_impl{VBOXSERVICE,pfnStop} */
611	static DECLCALLBACK(void) vgsvcCpuHotPlugStop(void)
612	{
613	VbglR3InterruptEventWaits();
614	return;
615	}
616
617
618	/**
619	* The 'CpuHotPlug' service description.
620	*/
621	VBOXSERVICE g_CpuHotPlug =
622	{
623	/* pszName. */
624	"cpuhotplug",
625	/* pszDescription. */
626	"CPU hot-plugging monitor",
627	/* pszUsage. */
628	NULL,
629	/* pszOptions. */
630	NULL,
631	/* methods */
632	VGSvcDefaultPreInit,
633	VGSvcDefaultOption,
634	VGSvcDefaultInit,
635	vgsvcCpuHotPlugWorker,
636	vgsvcCpuHotPlugStop,
637	VGSvcDefaultTerm
638	};
639

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source: vbox/trunk/src/VBox/Additions/common/VBoxService/VBoxServiceCpuHotPlug.cpp@ 59001

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