From d3460bcbdce5fddbbc64ae6fa9d80b2c55cdee14 Mon Sep 17 00:00:00 2001 From: Star Zeng Date: Tue, 19 May 2015 01:32:52 +0000 Subject: MdeModulePkg Variable: Prevent BS variable update in legacy OS runtime. Contributed-under: TianoCore Contribution Agreement 1.0 Signed-off-by: Star Zeng Reviewed-by: Jiewen Yao Reviewed-by: Liming Gao git-svn-id: https://svn.code.sf.net/p/edk2/code/trunk/edk2@17467 6f19259b-4bc3-4df7-8a09-765794883524 --- .../Universal/Variable/RuntimeDxe/VariableSmmRuntimeDxe.c | 12 ++++++++++++ 1 file changed, 12 insertions(+) (limited to 'MdeModulePkg') diff --git a/MdeModulePkg/Universal/Variable/RuntimeDxe/VariableSmmRuntimeDxe.c b/MdeModulePkg/Universal/Variable/RuntimeDxe/VariableSmmRuntimeDxe.c index 3a87298160..0e0a7c5c3b 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); @@ -1064,6 +1065,17 @@ VariableSmmRuntimeInitialize ( &ExitBootServiceEvent ); + // + // 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. // -- cgit v1.2.3