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/* $Id: VBoxGuestR3LibCpuHotPlug.cpp $ */
/** @file
* VBoxGuestR3Lib - Ring-3 Support Library for VirtualBox guest additions, CPU Hot Plugging.
*/
/*
* Copyright (C) 2010-2023 Oracle and/or its affiliates.
*
* This file is part of VirtualBox base platform packages, as
* available from https://www.virtualbox.org.
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* as published by the Free Software Foundation, in version 3 of the
* License.
*
* This program is distributed in the hope that it will be useful, but
* WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, see <https://www.gnu.org/licenses>.
*
* The contents of this file may alternatively be used under the terms
* of the Common Development and Distribution License Version 1.0
* (CDDL), a copy of it is provided in the "COPYING.CDDL" file included
* in the VirtualBox distribution, in which case the provisions of the
* CDDL are applicable instead of those of the GPL.
*
* You may elect to license modified versions of this file under the
* terms and conditions of either the GPL or the CDDL or both.
*
* SPDX-License-Identifier: GPL-3.0-only OR CDDL-1.0
*/
/*********************************************************************************************************************************
* Header Files *
*********************************************************************************************************************************/
#include "VBoxGuestR3LibInternal.h"
#include <iprt/assert.h>
#include <iprt/errcore.h>
/**
* Initialize CPU hot plugging.
*
* This will enable the CPU hot plugging events.
*
* @returns VBox status code.
*/
VBGLR3DECL(int) VbglR3CpuHotPlugInit(void)
{
int rc = VbglR3CtlFilterMask(VMMDEV_EVENT_CPU_HOTPLUG, 0);
if (RT_FAILURE(rc))
return rc;
VMMDevCpuHotPlugStatusRequest Req;
vmmdevInitRequest(&Req.header, VMMDevReq_SetCpuHotPlugStatus);
Req.enmStatusType = VMMDevCpuStatusType_Enable;
rc = vbglR3GRPerform(&Req.header);
if (RT_FAILURE(rc))
VbglR3CtlFilterMask(0, VMMDEV_EVENT_CPU_HOTPLUG);
return rc;
}
/**
* Terminate CPU hot plugging.
*
* This will disable the CPU hot plugging events.
*
* @returns VBox status code.
*/
VBGLR3DECL(int) VbglR3CpuHotPlugTerm(void)
{
/* Clear the events. */
VbglR3CtlFilterMask(0, VMMDEV_EVENT_CPU_HOTPLUG);
VMMDevCpuHotPlugStatusRequest Req;
vmmdevInitRequest(&Req.header, VMMDevReq_SetCpuHotPlugStatus);
Req.enmStatusType = VMMDevCpuStatusType_Disable;
return vbglR3GRPerform(&Req.header);
}
/**
* Waits for a CPU hot plugging event and retrieve the data associated with it.
*
* @returns VBox status code.
* @param penmEventType Where to store the event type on success.
* @param pidCpuCore Where to store the CPU core ID on success.
* @param pidCpuPackage Where to store the CPU package ID on success.
*/
VBGLR3DECL(int) VbglR3CpuHotPlugWaitForEvent(VMMDevCpuEventType *penmEventType, uint32_t *pidCpuCore, uint32_t *pidCpuPackage)
{
AssertPtrReturn(penmEventType, VERR_INVALID_POINTER);
AssertPtrReturn(pidCpuCore, VERR_INVALID_POINTER);
AssertPtrReturn(pidCpuPackage, VERR_INVALID_POINTER);
uint32_t fEvents = 0;
int rc = VbglR3WaitEvent(VMMDEV_EVENT_CPU_HOTPLUG, RT_INDEFINITE_WAIT, &fEvents);
if (RT_SUCCESS(rc))
{
/* did we get the right event? */
if (fEvents & VMMDEV_EVENT_CPU_HOTPLUG)
{
VMMDevGetCpuHotPlugRequest Req;
/* get the CPU hot plugging request */
vmmdevInitRequest(&Req.header, VMMDevReq_GetCpuHotPlugRequest);
Req.idCpuCore = UINT32_MAX;
Req.idCpuPackage = UINT32_MAX;
Req.enmEventType = VMMDevCpuEventType_None;
rc = vbglR3GRPerform(&Req.header);
if (RT_SUCCESS(rc))
{
*penmEventType = Req.enmEventType;
*pidCpuCore = Req.idCpuCore;
*pidCpuPackage = Req.idCpuPackage;
return VINF_SUCCESS;
}
}
else
rc = VERR_TRY_AGAIN;
}
else if (rc == VERR_TIMEOUT) /* just in case */
rc = VERR_TRY_AGAIN;
return rc;
}
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