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/* $Id: mpnotification-r0drv-nt.cpp $ */
/** @file
* IPRT - Multiprocessor Event Notifications, Ring-0 Driver, NT.
*/
/*
* Copyright (C) 2008-2011 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-nt-kernel.h"
#include <iprt/mp.h>
#include <iprt/err.h>
#include <iprt/cpuset.h>
#include "r0drv/mp-r0drv.h"
#include "internal-r0drv-nt.h"
#if 0 /* The following is 100% untested code . */
#ifndef KE_PROCESSOR_CHANGE_ADD_EXISTING
/* Some bits that are missing from our DDK headers. */
typedef enum
{
KeProcessorAddStartNotify = 0,
KeProcessorAddCompleteNotify,
KeProcessorAddFailureNotify
} KE_PROCESSOR_CHANGE_NOTIFY_STATE;
typedef struct _KE_PROCESSOR_CHANGE_NOTIFY_CONTEXT
{
KE_PROCESSOR_CHANGE_NOTIFY_STATE State;
ULONG NtNumber;
NTSTATUS Status;
} KE_PROCESSOR_CHANGE_NOTIFY_CONTEXT;
typedef KE_PROCESSOR_CHANGE_NOTIFY_CONTEXT *PKE_PROCESSOR_CHANGE_NOTIFY_CONTEXT;
typedef VOID (__stdcall *PPROCESSOR_CALLBACK_FUNCTION)(PVOID, PKE_PROCESSOR_CHANGE_NOTIFY_CONTEXT, PNTSTATUS);
# define KE_PROCESSOR_CHANGE_ADD_EXISTING 1
#endif /* !KE_PROCESSOR_CHANGE_ADD_EXISTING */
/*******************************************************************************
* Structures and Typedefs *
*******************************************************************************/
/** Typedef of KeRegisterProcessorChangeCallback. */
typedef PVOID (__stdcall *PFNMYKEREGISTERPROCESSORCHANGECALLBACK)(PPROCESSOR_CALLBACK_FUNCTION, PVOID, ULONG);
/** Typedef of KeDeregisterProcessorChangeCallback. */
typedef VOID (__stdcall *PFNMYKEDEREGISTERPROCESSORCHANGECALLBACK)(PVOID);
/*******************************************************************************
* Global Variables *
*******************************************************************************/
/** The pointer to KeRegisterProcessorChangeCallback if found. */
static PFNMYKEREGISTERPROCESSORCHANGECALLBACK g_pfnKeRegisterProcessorChangeCallback = NULL;
/** The pointer to KeDeregisterProcessorChangeCallback if found. */
static PFNMYKEDEREGISTERPROCESSORCHANGECALLBACK g_pfnKeDeregisterProcessorChangeCallback = NULL;
/** The callback handle. */
static PVOID g_hCallback = NULL;
/**
* The native callback.
*
* @param pNotifierBlock Pointer to g_NotifierBlock.
* @param ulNativeEvent The native event.
* @param pvCpu The cpu id cast into a pointer value.
*/
static VOID __stdcall rtMpNotificationNtCallback(PVOID pvUser,
PKE_PROCESSOR_CHANGE_NOTIFY_CONTEXT pChangeContext,
PNTSTATUS pOperationStatus)
{
NOREF(pvUser);
AssertPtr(pChangeContext);
AssertPtrNull(pOperationStatus);
RTCPUID idCpu = pChangeContext->NtNumber;
switch (pChangeContext->State)
{
case KeProcessorAddStartNotify:
case KeProcessorAddFailureNotify:
break;
case KeProcessorAddCompleteNotify:
/* Update the active CPU set before doing callback round. */
RTCpuSetAdd(&g_rtMpNtCpuSet, idCpu);
rtMpNotificationDoCallbacks(RTMPEVENT_ONLINE, idCpu);
break;
//case KeProcessorDelCompleteNotify:
// rtMpNotificationDoCallbacks(RTMPEVENT_OFFLINE, idCpu);
// break;
default:
AssertMsgFailed(("Unexpected state=%d idCpu=%d\n", pChangeContext->State, (int)idCpu));
break;
}
*pOperationStatus = STATUS_SUCCESS;
}
DECLHIDDEN(int) rtR0MpNotificationNativeInit(void)
{
/*
* Try resolve the symbols.
*/
UNICODE_STRING RoutineName;
RtlInitUnicodeString(&RoutineName, L"KeRegisterProcessorChangeCallback");
g_pfnKeRegisterProcessorChangeCallback = (PFNMYKEREGISTERPROCESSORCHANGECALLBACK)MmGetSystemRoutineAddress(&RoutineName);
if (g_pfnKeRegisterProcessorChangeCallback)
{
RtlInitUnicodeString(&RoutineName, L"KeDeregisterProcessorChangeCallback");
g_pfnKeDeregisterProcessorChangeCallback = (PFNMYKEDEREGISTERPROCESSORCHANGECALLBACK)MmGetSystemRoutineAddress(&RoutineName);
if (g_pfnKeDeregisterProcessorChangeCallback)
{
/*
* Try call it.
*/
NTSTATUS ntRc = 0;
g_hCallback = g_pfnKeRegisterProcessorChangeCallback(rtMpNotificationNtCallback, &ntRc, KE_PROCESSOR_CHANGE_ADD_EXISTING);
if (g_hCallback != NULL)
return VINF_SUCCESS;
/* Genuine failure. */
int rc = RTErrConvertFromNtStatus(ntRc);
AssertMsgFailed(("ntRc=%#x rc=%d\n", ntRc, rc));
return rc;
}
/* this shouldn't happen. */
AssertFailed();
}
/* Not supported - success. */
g_pfnKeRegisterProcessorChangeCallback = NULL;
g_pfnKeDeregisterProcessorChangeCallback = NULL;
return VINF_SUCCESS;
}
DECLHIDDEN(void) rtR0MpNotificationNativeTerm(void)
{
if ( g_pfnKeDeregisterProcessorChangeCallback
&& g_hCallback)
{
g_pfnKeDeregisterProcessorChangeCallback(g_hCallback);
g_hCallback = NULL;
}
}
#else /* Not supported */
DECLHIDDEN(int) rtR0MpNotificationNativeInit(void)
{
return VINF_SUCCESS;
}
DECLHIDDEN(void) rtR0MpNotificationNativeTerm(void)
{
}
#endif /* Not supported */
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