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/* $Id$ */
/** @file
* MsrSup - SupDrv-specific MSR access.
*/
/*
* Copyright (C) 2013-2022 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.
*/
/*********************************************************************************************************************************
* Header Files *
*********************************************************************************************************************************/
#include "VBoxCpuReport.h"
#include <iprt/errcore.h>
#include <iprt/x86.h>
int VbCpuRepMsrProberInitSupDrv(PVBCPUREPMSRACCESSORS pMsrFunctions)
{
int rc = SUPR3Init(NULL);
if (RT_SUCCESS(rc))
{
/* Test if the MSR prober is available, since the interface is optional. The TSC MSR will exist on any supported CPU. */
uint64_t uValue;
bool fGp;
rc = SUPR3MsrProberRead(MSR_IA32_TSC, NIL_RTCPUID, &uValue, &fGp);
if ( rc != VERR_NOT_IMPLEMENTED
&& rc != VERR_INVALID_FUNCTION)
{
pMsrFunctions->fAtomic = true;
pMsrFunctions->pfnMsrProberRead = SUPR3MsrProberRead;
pMsrFunctions->pfnMsrProberWrite = SUPR3MsrProberWrite;
pMsrFunctions->pfnMsrProberModify = SUPR3MsrProberModify;
pMsrFunctions->pfnTerm = NULL;
return VINF_SUCCESS;
}
vbCpuRepDebug("warning: MSR probing not supported by the support driver (%Rrc).\n", rc);
}
else
vbCpuRepDebug("warning: Unable to initialize the support library (%Rrc).\n", rc);
return rc;
}
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