MdePkg/Baseib: Filter/trace MSR access for IA32/X64

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>
This commit is contained in:
Dandan Bi
2021-03-12 18:05:07 +08:00
committed by mergify[bot]
parent 38c8be123a
commit dc4d42302c
7 changed files with 129 additions and 43 deletions

View File

@@ -1,13 +1,13 @@
/** @file
AsmWriteMsr64 function
Copyright (c) 2006 - 2008, Intel Corporation. All rights reserved.<BR>
Copyright (c) 2006 - 2021, Intel Corporation. All rights reserved.<BR>
SPDX-License-Identifier: BSD-2-Clause-Patent
**/
#include <Library/RegisterFilterLib.h>
/**
Writes a 64-bit value to a Machine Specific Register(MSR), and returns the
@@ -33,11 +33,19 @@ AsmWriteMsr64 (
IN UINT64 Value
)
{
_asm {
mov edx, dword ptr [Value + 4]
mov eax, dword ptr [Value + 0]
mov ecx, Index
wrmsr
BOOLEAN Flag;
Flag = FilterBeforeMsrWrite (Index, &Value);
if (Flag) {
_asm {
mov edx, dword ptr [Value + 4]
mov eax, dword ptr [Value + 0]
mov ecx, Index
wrmsr
}
}
FilterAfterMsrWrite (Index, &Value);
return Value;
}