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UefiCpuPkg/PiSmmCpuDxeSmm/SmmProfile: Remove unnecessary BTS MSRs 

BTS used DS save area by IA32_DS_AREA MSR to get invoker IP instead of the
Last Branch Record Stack. So, removed the unnecessary BTS MSRs.

Cc: Michael Kinney <michael.d.kinney@intel.com>
Cc: Jiewen Yao <jiewen.yao@intel.com>
Cc: Feng Tian <feng.tian@intel.com>
Contributed-under: TianoCore Contribution Agreement 1.0
Signed-off-by: Jeff Fan <jeff.fan@intel.com>
Reviewed-by: Jiewen Yao <jiewen.yao@intel.com>
Reviewed-by: Michael Kinney <michael.d.kinney@intel.com>
Regression-tested-by: Laszlo Ersek <lersek@redhat.com>
This commit is contained in:
Jeff Fan 2016-04-05 14:33:45 +08:00 committed by Michael Kinney
parent 4b1f9ac19d
commit 846704334c
2 changed files with 1 additions and 6 deletions
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2
UefiCpuPkg/PiSmmCpuDxeSmm/SmmProfile.c
View File

@ -1071,8 +1071,6 @@ ActivateLBR (
if ((DebugCtl & MSR_DEBUG_CTL_LBR) != 0) {
return ;
}
AsmWriteMsr64 (MSR_LER_FROM_LIP, 0);
AsmWriteMsr64 (MSR_LER_TO_LIP, 0);
DebugCtl |= MSR_DEBUG_CTL_LBR;
AsmWriteMsr64 (MSR_DEBUG_CTL, DebugCtl);
}

5
UefiCpuPkg/PiSmmCpuDxeSmm/SmmProfileInternal.h
View File

@ -1,7 +1,7 @@
/** @file
SMM profile internal header file.
Copyright (c) 2012 - 2015, Intel Corporation. All rights reserved.<BR>
Copyright (c) 2012 - 2016, Intel Corporation. All rights reserved.<BR>
This program and the accompanying materials
are licensed and made available under the terms and conditions of the BSD License
which accompanies this distribution. The full text of the license may be found at
@ -66,9 +66,6 @@ WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
#define MSR_DEBUG_CTL_TR 0x40
#define MSR_DEBUG_CTL_BTS 0x80
#define MSR_DEBUG_CTL_BTINT 0x100
#define MSR_LASTBRANCH_TOS 0x1C9
#define MSR_LER_FROM_LIP 0x1DD
#define MSR_LER_TO_LIP 0x1DE
#define MSR_DS_AREA 0x600
typedef struct {