1 files changed, 30 insertions, 0 deletions
diff --git a/roms/edk2/MdePkg/Library/BaseLib/Ia32/Lfence.nasm b/roms/edk2/MdePkg/Library/BaseLib/Ia32/Lfence.nasm
new file mode 100644
index 000000000..44478be35
--- /dev/null
+++ b/roms/edk2/MdePkg/Library/BaseLib/Ia32/Lfence.nasm
@@ -0,0 +1,30 @@
+;------------------------------------------------------------------------------ ;
+; Copyright (c) 2018, Intel Corporation. All rights reserved.<BR>
+; SPDX-License-Identifier: BSD-2-Clause-Patent
+;
+; Module Name:
+;
+;   Lfence.nasm
+;
+; Abstract:
+;
+;   Performs a serializing operation on all load-from-memory instructions that
+;   were issued prior to the call of this function.
+;
+; Notes:
+;
+;------------------------------------------------------------------------------
+
+    SECTION .text
+
+;------------------------------------------------------------------------------
+; VOID
+; EFIAPI
+; AsmLfence (
+;   VOID
+;   );
+;------------------------------------------------------------------------------
+global ASM_PFX(AsmLfence)
+ASM_PFX(AsmLfence):
+    lfence
+    ret