MdeModulePkg/SmmLockBox: Update to consume SpeculationBarrier

REF:https://bugzilla.tianocore.org/show_bug.cgi?id=1417

Since BaseLib API AsmLfence() is a x86 arch specific API and should be
avoided using in generic codes, this commit replaces the usage of
AsmLfence() with arch-generic API SpeculationBarrier().

Cc: Ard Biesheuvel <ard.biesheuvel@linaro.org>
Cc: Jiewen Yao <jiewen.yao@intel.com>
Cc: Liming Gao <liming.gao@intel.com>
Contributed-under: TianoCore Contribution Agreement 1.1
Signed-off-by: Hao Wu <hao.a.wu@intel.com>
Reviewed-by: Jian J Wang <jian.j.wang@intel.com>

1 files changed, 6 insertions, 6 deletions

diff --git a/MdeModulePkg/Universal/LockBox/SmmLockBox/SmmLockBox.c b/MdeModulePkg/Universal/LockBox/SmmLockBox/SmmLockBox.c
index c1c9aa5..a743129 100644
--- a/MdeModulePkg/Universal/LockBox/SmmLockBox/SmmLockBox.c
+++ b/MdeModulePkg/Universal/LockBox/SmmLockBox/SmmLockBox.c
@@ -77,10 +77,10 @@ SmmLockBoxSave (
     return ;

   }

   //

-  // The AsmLfence() call here is to ensure the above range check for the

-  // CommBuffer have been completed before calling into SaveLockBox().

+  // The SpeculationBarrier() call here is to ensure the above range check for

+  // the CommBuffer have been completed before calling into SaveLockBox().

   //

-  AsmLfence ();

+  SpeculationBarrier ();

 

   //

   // Save data

@@ -166,10 +166,10 @@ SmmLockBoxUpdate (
     return ;

   }

   //

-  // The AsmLfence() call here is to ensure the above range check for the

-  // CommBuffer have been completed before calling into UpdateLockBox().

+  // The SpeculationBarrier() call here is to ensure the above range check for

+  // the CommBuffer have been completed before calling into UpdateLockBox().

   //

-  AsmLfence ();

+  SpeculationBarrier ();

 

   //

   // Update data