| 1 | /* $Id: MsrSup.cpp 69584 2017-11-04 22:31:10Z 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) 2013-2017 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 <iprt/ctype.h>
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| 23 | #include <iprt/x86.h>
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| 24 |
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| 25 | #include <VBox/sup.h>
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| 26 | #include "VBoxCpuReport.h"
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| 27 |
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| 28 |
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| 29 | /* Wrappers to mask funny SUPR3 calling conventions on some platforms. */
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| 30 | static int supMsrProberRead(uint32_t uMsr, RTCPUID idCpu, uint64_t *puValue, bool *pfGp)
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| 31 | {
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| 32 | return SUPR3MsrProberRead(uMsr, idCpu, puValue, pfGp);
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| 33 | }
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| 34 |
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| 35 | static int supMsrProberWrite(uint32_t uMsr, RTCPUID idCpu, uint64_t uValue, bool *pfGp)
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| 36 | {
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| 37 | return SUPR3MsrProberWrite(uMsr, idCpu, uValue, pfGp);
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| 38 | }
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| 39 |
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| 40 | static int supMsrProberModify(uint32_t uMsr, RTCPUID idCpu, uint64_t fAndMask, uint64_t fOrMask, PSUPMSRPROBERMODIFYRESULT pResult)
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| 41 | {
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| 42 | return SUPR3MsrProberModify(uMsr, idCpu, fAndMask, fOrMask, pResult);
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| 43 | }
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| 44 |
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| 45 | static int supMsrProberTerm(void)
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| 46 | {
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| 47 | return VINF_SUCCESS;
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| 48 | }
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| 49 |
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| 50 | int SupDrvMsrProberInit(VBMSRFNS *fnsMsr, bool *pfAtomicMsrMod)
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| 51 | {
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| 52 | int rc = SUPR3Init(NULL);
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| 53 | if (RT_FAILURE(rc))
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| 54 | {
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| 55 | vbCpuRepDebug("warning: Unable to initialize the support library (%Rrc).\n", rc);
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| 56 | return VERR_NOT_FOUND;
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| 57 | }
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| 58 |
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| 59 | /* 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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| 60 | uint64_t uValue;
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| 61 | bool fGp;
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| 62 | rc = SUPR3MsrProberRead(MSR_IA32_TSC, NIL_RTCPUID, &uValue, &fGp);
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| 63 | if (RT_FAILURE(rc))
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| 64 | {
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| 65 | vbCpuRepDebug("warning: MSR probing not supported by the support driver (%Rrc).\n", rc);
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| 66 | return VERR_NOT_SUPPORTED;
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| 67 | }
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| 68 |
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| 69 | fnsMsr->msrRead = supMsrProberRead;
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| 70 | fnsMsr->msrWrite = supMsrProberWrite;
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| 71 | fnsMsr->msrModify = supMsrProberModify;
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| 72 | fnsMsr->msrProberTerm = supMsrProberTerm;
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| 73 | *pfAtomicMsrMod = true;
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| 74 |
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| 75 | return VINF_SUCCESS;
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| 76 | }
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