mpnotification-r0drv-solaris.c revision e64031e20c39650a7bc902a3e1aba613b9415dee
/* $Id$ */
/** @file
* IPRT - Multiprocessor Event Notifications, Ring-0 Driver, Solaris.
*/
/*
* Copyright (C) 2008 Oracle Corporation
*
* This file is part of VirtualBox Open Source Edition (OSE), as
* available from http://www.virtualbox.org. This file is free software;
* you can redistribute it and/or modify it under the terms of the GNU
* General Public License (GPL) as published by the Free Software
* Foundation, in version 2 as it comes in the "COPYING" file of the
* VirtualBox OSE distribution. VirtualBox OSE is distributed in the
* hope that it will be useful, but WITHOUT ANY WARRANTY of any kind.
*
* The contents of this file may alternatively be used under the terms
* of the Common Development and Distribution License Version 1.0
* (CDDL) only, as it comes in the "COPYING.CDDL" file of the
* VirtualBox OSE 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.
*/
/*******************************************************************************
* Header Files *
*******************************************************************************/
#include "../the-solaris-kernel.h"
#include "internal/iprt.h"
#include <iprt/err.h>
#include <iprt/mp.h>
#include <iprt/cpuset.h>
#include "r0drv/mp-r0drv.h"
/*******************************************************************************
* Global Variables *
*******************************************************************************/
/** CPU watch callback handle. */
static vbi_cpu_watch_t *g_hVbiCpuWatch = NULL;
/** Set of online cpus that is maintained by the MP callback.
* This avoids locking issues quering the set from the kernel as well as
* eliminating any uncertainty regarding the online status during the
* callback. */
RTCPUSET g_rtMpSolarisCpuSet;
static void rtMpNotificationSolarisCallback(void *pvUser, int iCpu, int online)
{
NOREF(pvUser);
/* ASSUMES iCpu == RTCPUID */
if (online)
{
RTCpuSetAdd(&g_rtMpSolarisCpuSet, iCpu);
rtMpNotificationDoCallbacks(RTMPEVENT_ONLINE, iCpu);
}
else
{
RTCpuSetDel(&g_rtMpSolarisCpuSet, iCpu);
rtMpNotificationDoCallbacks(RTMPEVENT_OFFLINE, iCpu);
}
}
int rtR0MpNotificationNativeInit(void)
{
if (vbi_revision_level < 2)
return VERR_NOT_SUPPORTED;
if (g_hVbiCpuWatch != NULL)
return VERR_WRONG_ORDER;
/*
* Register the callback building the online cpu set as we
* do so (current_too = 1).
*/
RTCpuSetEmpty(&g_rtMpSolarisCpuSet);
g_hVbiCpuWatch = vbi_watch_cpus(rtMpNotificationSolarisCallback, NULL, 1 /*current_too*/);
return VINF_SUCCESS;
}
void rtR0MpNotificationNativeTerm(void)
{
if (vbi_revision_level >= 2 && g_hVbiCpuWatch != NULL)
vbi_ignore_cpus(g_hVbiCpuWatch);
g_hVbiCpuWatch = NULL;
}