Reviewed-by: Liming Gao <liming....@intel.com>
-----Original Message-----
From: Zeng, Star
Sent: Monday, May 18, 2015 2:48 PM
To: edk2-devel@lists.sourceforge.net
Cc: Yao, Jiewen; Gao, Liming
Subject: [PATCH 1/2] MdeModulePkg Variable: Prevent BS variable update in
legacy OS runtime.
Cc: Jiewen Yao <jiewen....@intel.com>
Cc: Liming Gao <liming....@intel.com>
Contributed-under: TianoCore Contribution Agreement 1.0
Signed-off-by: Star Zeng <star.z...@intel.com>
---
.../Universal/Variable/RuntimeDxe/VariableSmmRuntimeDxe.c | 12 ++++++++++++
1 file changed, 12 insertions(+)
diff --git a/MdeModulePkg/Universal/Variable/RuntimeDxe/VariableSmmRuntimeDxe.c
b/MdeModulePkg/Universal/Variable/RuntimeDxe/VariableSmmRuntimeDxe.c
index 3a87298..0e0a7c5 100644
--- a/MdeModulePkg/Universal/Variable/RuntimeDxe/VariableSmmRuntimeDxe.c
+++ b/MdeModulePkg/Universal/Variable/RuntimeDxe/VariableSmmRuntimeDxe.c
@@ -997,6 +997,7 @@ VariableSmmRuntimeInitialize (
VOID *SmmVariableWriteRegistration;
EFI_EVENT OnReadyToBootEvent;
EFI_EVENT ExitBootServiceEvent;
+ EFI_EVENT LegacyBootEvent;
EfiInitializeLock (&mVariableServicesLock, TPL_NOTIFY);
@@ -1065,6 +1066,17 @@ VariableSmmRuntimeInitialize (
);
//
+ // Register the event to inform SMM variable that it is at runtime for
legacy boot.
+ // Reuse OnExitBootServices() here.
+ //
+ EfiCreateEventLegacyBootEx(
+ TPL_NOTIFY,
+ OnExitBootServices,
+ NULL,
+ &LegacyBootEvent
+ );
+
+ //
// Register the event to convert the pointer for runtime.
//
gBS->CreateEventEx (
--
1.9.5.msysgit.0
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