Create new functions to abstract how XD/NX is detected, enabled, and
disabled. Also, create a new function to determine if Branch Trace
Storage is supported. Existing code is specific to Intel processors.
This provides NULL implementations of the new functions.
Contributed-under: TianoCore Contribution Agreement 1.0
Signed-off-by: Joseph Shifflett <joseph.shiffl...@hpe.com>
---
QuarkSocPkg/QuarkNorthCluster/Library/SmmCpuFeaturesLib/SmmCpuFeaturesLib.c |
44 ++++++++++++++++++++
1 file changed, 44 insertions(+)
diff --git
a/QuarkSocPkg/QuarkNorthCluster/Library/SmmCpuFeaturesLib/SmmCpuFeaturesLib.c
b/QuarkSocPkg/QuarkNorthCluster/Library/SmmCpuFeaturesLib/SmmCpuFeaturesLib.c
index 54eeac6d19a3..ddd667cc993f 100644
---
a/QuarkSocPkg/QuarkNorthCluster/Library/SmmCpuFeaturesLib/SmmCpuFeaturesLib.c
+++
b/QuarkSocPkg/QuarkNorthCluster/Library/SmmCpuFeaturesLib/SmmCpuFeaturesLib.c
@@ -2,6 +2,7 @@
The Quark CPU specific programming for PiSmmCpuDxeSmm module.
Copyright (c) 2010 - 2016, Intel Corporation. All rights reserved.<BR>
+(C) Copyright 2016 Hewlett Packard Enterprise Development LP<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
@@ -450,3 +451,46 @@ SmmCpuFeaturesAllocatePageTableMemory (
{
return NULL;
}
+/**
+ This API provides a method to determine if XD/NX support has been forced off
in
+ the non-SMM execution environment. It will enable XD/NX support while in SMM
+
+ @retval TRUE XD/NX was disabled when runningn in the non-SMM execution
environment
+ @retval FALSE XD/NX was enabled when runningn in the non-SMM execution
environment
+
+**/
+BOOLEAN
+EFIAPI
+SmmCpuFeaturesCheckAndEnableXdSupport (
+ VOID
+ )
+{
+ return FALSE;
+}
+
+/**
+ This API provides a method to disable XD/NX support before exiting SMM
+**/
+VOID
+EFIAPI
+SmmCpuFeaturesDisableXdSupport (
+ VOID
+ )
+{
+}
+
+/**
+ This API determines if Branch Trace Storage Support is currently available
+
+ @retval TRUE BTS is available
+ @retval FALSE BTS is disabled
+
+**/
+BOOLEAN
+EFIAPI
+SmmCpuFeaturesConfirmBranchTraceStorageSupport (
+ VOID
+ )
+{
+ return FALSE;
+}
--
2.7.4
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