/* $Id: VBoxCpuReportMsrSup.cpp $ */ /** @file * MsrSup - SupDrv-specific MSR access. */ /* * Copyright (C) 2013-2023 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 . * * SPDX-License-Identifier: GPL-3.0-only */ /********************************************************************************************************************************* * Header Files * *********************************************************************************************************************************/ #include "VBoxCpuReport.h" #include #include 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; }