| 1 | /* $Id: VBoxGuestR3LibCpuHotPlug.cpp 106061 2024-09-16 14:03:52Z vboxsync $ */
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| 2 | /** @file
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| 3 | * VBoxGuestR3Lib - Ring-3 Support Library for VirtualBox guest additions, CPU Hot Plugging.
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| 4 | */
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| 5 |
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| 6 | /*
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| 7 | * Copyright (C) 2010-2024 Oracle and/or its affiliates.
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| 8 | *
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| 9 | * This file is part of VirtualBox base platform packages, as
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| 10 | * available from https://www.virtualbox.org.
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| 11 | *
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| 12 | * This program is free software; you can redistribute it and/or
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| 13 | * modify it under the terms of the GNU General Public License
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| 14 | * as published by the Free Software Foundation, in version 3 of the
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| 15 | * License.
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| 16 | *
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| 17 | * This program is distributed in the hope that it will be useful, but
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| 18 | * WITHOUT ANY WARRANTY; without even the implied warranty of
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| 19 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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| 20 | * General Public License for more details.
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| 21 | *
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| 22 | * You should have received a copy of the GNU General Public License
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| 23 | * along with this program; if not, see <https://www.gnu.org/licenses>.
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| 24 | *
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| 25 | * The contents of this file may alternatively be used under the terms
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| 26 | * of the Common Development and Distribution License Version 1.0
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| 27 | * (CDDL), a copy of it is provided in the "COPYING.CDDL" file included
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| 28 | * in the VirtualBox distribution, in which case the provisions of the
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| 29 | * CDDL are applicable instead of those of the GPL.
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| 30 | *
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| 31 | * You may elect to license modified versions of this file under the
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| 32 | * terms and conditions of either the GPL or the CDDL or both.
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| 33 | *
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| 34 | * SPDX-License-Identifier: GPL-3.0-only OR CDDL-1.0
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| 35 | */
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| 36 |
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| 37 |
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| 38 | /*********************************************************************************************************************************
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| 39 | * Header Files *
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| 40 | *********************************************************************************************************************************/
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| 41 | #include "VBoxGuestR3LibInternal.h"
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| 42 | #include <iprt/assert.h>
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| 43 | #include <iprt/errcore.h>
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| 44 |
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| 45 |
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| 46 | /**
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| 47 | * Initialize CPU hot plugging.
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| 48 | *
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| 49 | * This will enable the CPU hot plugging events.
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| 50 | *
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| 51 | * @returns VBox status code.
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| 52 | */
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| 53 | VBGLR3DECL(int) VbglR3CpuHotPlugInit(void)
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| 54 | {
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| 55 | int rc = VbglR3CtlFilterMask(VMMDEV_EVENT_CPU_HOTPLUG, 0);
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| 56 | if (RT_FAILURE(rc))
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| 57 | return rc;
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| 58 |
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| 59 | VMMDevCpuHotPlugStatusRequest Req;
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| 60 | vmmdevInitRequest(&Req.header, VMMDevReq_SetCpuHotPlugStatus);
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| 61 | Req.enmStatusType = VMMDevCpuStatusType_Enable;
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| 62 | rc = vbglR3GRPerform(&Req.header);
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| 63 | if (RT_FAILURE(rc))
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| 64 | VbglR3CtlFilterMask(0, VMMDEV_EVENT_CPU_HOTPLUG);
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| 65 |
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| 66 | return rc;
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| 67 | }
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| 68 |
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| 69 |
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| 70 | /**
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| 71 | * Terminate CPU hot plugging.
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| 72 | *
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| 73 | * This will disable the CPU hot plugging events.
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| 74 | *
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| 75 | * @returns VBox status code.
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| 76 | */
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| 77 | VBGLR3DECL(int) VbglR3CpuHotPlugTerm(void)
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| 78 | {
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| 79 | /* Clear the events. */
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| 80 | VbglR3CtlFilterMask(0, VMMDEV_EVENT_CPU_HOTPLUG);
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| 81 |
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| 82 | VMMDevCpuHotPlugStatusRequest Req;
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| 83 | vmmdevInitRequest(&Req.header, VMMDevReq_SetCpuHotPlugStatus);
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| 84 | Req.enmStatusType = VMMDevCpuStatusType_Disable;
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| 85 | return vbglR3GRPerform(&Req.header);
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| 86 | }
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| 87 |
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| 88 |
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| 89 | /**
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| 90 | * Waits for a CPU hot plugging event and retrieve the data associated with it.
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| 91 | *
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| 92 | * @returns VBox status code.
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| 93 | * @param penmEventType Where to store the event type on success.
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| 94 | * @param pidCpuCore Where to store the CPU core ID on success.
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| 95 | * @param pidCpuPackage Where to store the CPU package ID on success.
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| 96 | */
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| 97 | VBGLR3DECL(int) VbglR3CpuHotPlugWaitForEvent(VMMDevCpuEventType *penmEventType, uint32_t *pidCpuCore, uint32_t *pidCpuPackage)
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| 98 | {
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| 99 | AssertPtrReturn(penmEventType, VERR_INVALID_POINTER);
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| 100 | AssertPtrReturn(pidCpuCore, VERR_INVALID_POINTER);
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| 101 | AssertPtrReturn(pidCpuPackage, VERR_INVALID_POINTER);
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| 102 |
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| 103 | uint32_t fEvents = 0;
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| 104 | int rc = VbglR3WaitEvent(VMMDEV_EVENT_CPU_HOTPLUG, RT_INDEFINITE_WAIT, &fEvents);
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| 105 | if (RT_SUCCESS(rc))
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| 106 | {
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| 107 | /* did we get the right event? */
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| 108 | if (fEvents & VMMDEV_EVENT_CPU_HOTPLUG)
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| 109 | {
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| 110 | VMMDevGetCpuHotPlugRequest Req;
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| 111 |
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| 112 | /* get the CPU hot plugging request */
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| 113 | vmmdevInitRequest(&Req.header, VMMDevReq_GetCpuHotPlugRequest);
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| 114 | Req.idCpuCore = UINT32_MAX;
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| 115 | Req.idCpuPackage = UINT32_MAX;
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| 116 | Req.enmEventType = VMMDevCpuEventType_None;
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| 117 | rc = vbglR3GRPerform(&Req.header);
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| 118 | if (RT_SUCCESS(rc))
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| 119 | {
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| 120 | *penmEventType = Req.enmEventType;
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| 121 | *pidCpuCore = Req.idCpuCore;
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| 122 | *pidCpuPackage = Req.idCpuPackage;
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| 123 | return VINF_SUCCESS;
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| 124 | }
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| 125 | }
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| 126 | else
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| 127 | rc = VERR_TRY_AGAIN;
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| 128 | }
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| 129 | else if (rc == VERR_TIMEOUT) /* just in case */
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| 130 | rc = VERR_TRY_AGAIN;
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| 131 | return rc;
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| 132 | }
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| 133 |
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