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/* $Id: loadgeneratorR0.cpp $ */
/** @file
* Load Generator, Ring-0 Service.
*/
/*
* Copyright (C) 2008-2023 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 <iprt/mp.h>
#include <VBox/sup.h>
#include <iprt/errcore.h>
/**
* Worker for loadgenR0Ipi.
*/
static DECLCALLBACK(void) loadgenR0IpiWorker(RTCPUID idCpu, void *pvUser1, void *pvUser2)
{
NOREF(idCpu);
NOREF(pvUser1);
NOREF(pvUser2);
}
/**
* Generate broadcast inter processor interrupts (IPI), aka cross calls.
*
* @returns VBox status code.
* @param cIpis The number of IPIs to do.
*/
static int loadgenR0Ipi(uint64_t cIpis)
{
if (cIpis > _1G || !cIpis)
return VERR_INVALID_PARAMETER;
while (cIpis-- > 0)
{
int rc = RTMpOnAll(loadgenR0IpiWorker, NULL, NULL);
if (RT_FAILURE(rc))
return rc;
}
return VINF_SUCCESS;
}
/**
* Service request handler entry point.
*
* @copydoc FNSUPR0SERVICEREQHANDLER
*/
extern "C" DECLEXPORT(int) LoadGenR0ServiceReqHandler(PSUPDRVSESSION pSession, uint32_t uOperation,
uint64_t u64Arg, PSUPR0SERVICEREQHDR pReqHdr)
{
switch (uOperation)
{
case 0:
if (pReqHdr)
return VERR_INVALID_PARAMETER;
return loadgenR0Ipi(u64Arg);
default:
NOREF(pSession);
return VERR_NOT_SUPPORTED;
}
}
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