dc4d42302c
REF: https://bugzilla.tianocore.org/show_bug.cgi?id=3246 Cc: Michael D Kinney <michael.d.kinney@intel.com> Cc: Liming Gao <gaoliming@byosoft.com.cn> Cc: Zhiguang Liu <zhiguang.liu@intel.com> Signed-off-by: Dandan Bi <dandan.bi@intel.com> Reviewed-by: Michael D Kinney <michael.d.kinney@intel.com> Reviewed-by: Liming Gao <gaoliming@byosoft.com.cn> Acked-by: Ard Biesheuvel <ardb@kernel.org>
45 lines
809 B
C
45 lines
809 B
C
/** @file
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CpuBreakpoint function.
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Copyright (c) 2006 - 2021, Intel Corporation. All rights reserved.<BR>
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SPDX-License-Identifier: BSD-2-Clause-Patent
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**/
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/**
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Microsoft Visual Studio 7.1 Function Prototypes for I/O Intrinsics.
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**/
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#include <Library/RegisterFilterLib.h>
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unsigned __int64 __readmsr (int register);
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#pragma intrinsic(__readmsr)
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/**
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Read data to MSR.
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@param Index Register index of MSR.
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@return Value read from MSR.
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**/
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UINT64
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EFIAPI
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AsmReadMsr64 (
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IN UINT32 Index
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)
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{
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UINT64 Value;
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BOOLEAN Flag;
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Flag = FilterBeforeMsrRead (Index, &Value);
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if (Flag) {
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Value = __readmsr (Index);
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}
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FilterAfterMsrRead (Index, &Value);
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return Value;
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}
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