| 1 | /* $Id: VBoxCpuReportMsrSup.cpp 93115 2022-01-01 11:31:46Z vboxsync $ */
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| 2 | /** @file
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| 3 | * MsrSup - SupDrv-specific MSR access.
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| 4 | */
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| 5 |
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| 6 | /*
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| 7 | * Copyright (C) 2013-2022 Oracle Corporation
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| 8 | *
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| 9 | * This file is part of VirtualBox Open Source Edition (OSE), as
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| 10 | * available from http://www.virtualbox.org. This file is free software;
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| 11 | * you can redistribute it and/or modify it under the terms of the GNU
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| 12 | * General Public License (GPL) as published by the Free Software
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| 13 | * Foundation, in version 2 as it comes in the "COPYING" file of the
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| 14 | * VirtualBox OSE distribution. VirtualBox OSE is distributed in the
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| 15 | * hope that it will be useful, but WITHOUT ANY WARRANTY of any kind.
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| 16 | */
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| 17 |
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| 18 |
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| 19 | /*********************************************************************************************************************************
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| 20 | * Header Files *
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| 21 | *********************************************************************************************************************************/
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| 22 | #include "VBoxCpuReport.h"
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| 23 | #include <iprt/errcore.h>
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| 24 | #include <iprt/x86.h>
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| 25 |
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| 26 |
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| 27 | int VbCpuRepMsrProberInitSupDrv(PVBCPUREPMSRACCESSORS pMsrFunctions)
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| 28 | {
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| 29 | int rc = SUPR3Init(NULL);
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| 30 | if (RT_SUCCESS(rc))
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| 31 | {
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| 32 | /* Test if the MSR prober is available, since the interface is optional. The TSC MSR will exist on any supported CPU. */
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| 33 | uint64_t uValue;
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| 34 | bool fGp;
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| 35 | rc = SUPR3MsrProberRead(MSR_IA32_TSC, NIL_RTCPUID, &uValue, &fGp);
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| 36 | if ( rc != VERR_NOT_IMPLEMENTED
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| 37 | && rc != VERR_INVALID_FUNCTION)
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| 38 | {
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| 39 | pMsrFunctions->fAtomic = true;
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| 40 | pMsrFunctions->pfnMsrProberRead = SUPR3MsrProberRead;
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| 41 | pMsrFunctions->pfnMsrProberWrite = SUPR3MsrProberWrite;
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| 42 | pMsrFunctions->pfnMsrProberModify = SUPR3MsrProberModify;
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| 43 |
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| 44 | pMsrFunctions->pfnTerm = NULL;
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| 45 | return VINF_SUCCESS;
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| 46 |
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| 47 | }
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| 48 | vbCpuRepDebug("warning: MSR probing not supported by the support driver (%Rrc).\n", rc);
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| 49 | }
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| 50 | else
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| 51 | vbCpuRepDebug("warning: Unable to initialize the support library (%Rrc).\n", rc);
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| 52 | return rc;
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| 53 | }
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| 54 |
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