diff options
| -rw-r--r-- | MdeModulePkg/Universal/FaultTolerantWriteDxe/FaultTolerantWriteSmm.c | 7 | ||||
| -rw-r--r-- | MdeModulePkg/Universal/FaultTolerantWriteDxe/FaultTolerantWriteSmm.inf | 1 |
2 files changed, 8 insertions, 0 deletions
diff --git a/MdeModulePkg/Universal/FaultTolerantWriteDxe/FaultTolerantWriteSmm.c b/MdeModulePkg/Universal/FaultTolerantWriteDxe/FaultTolerantWriteSmm.c index 1e75328f9b..2b53cf8fc2 100644 --- a/MdeModulePkg/Universal/FaultTolerantWriteDxe/FaultTolerantWriteSmm.c +++ b/MdeModulePkg/Universal/FaultTolerantWriteDxe/FaultTolerantWriteSmm.c @@ -57,6 +57,7 @@ WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED. #include <PiSmm.h>
#include <Library/SmmServicesTableLib.h>
#include <Library/SmmMemLib.h>
+#include <Library/BaseLib.h>
#include <Protocol/SmmSwapAddressRange.h>
#include "FaultTolerantWrite.h"
#include "FaultTolerantWriteSmmCommon.h"
@@ -417,6 +418,12 @@ SmmFaultTolerantWriteHandler ( &SmmFvbHandle
);
if (!EFI_ERROR (Status)) {
+ //
+ // The AsmLfence() call here is to ensure the previous range/content
+ // checks for the CommBuffer have been completed before calling into
+ // FtwWrite().
+ //
+ AsmLfence ();
Status = FtwWrite(
&mFtwDevice->FtwInstance,
SmmFtwWriteHeader->Lba,
diff --git a/MdeModulePkg/Universal/FaultTolerantWriteDxe/FaultTolerantWriteSmm.inf b/MdeModulePkg/Universal/FaultTolerantWriteDxe/FaultTolerantWriteSmm.inf index 3b57c3cf64..ef7f773c82 100644 --- a/MdeModulePkg/Universal/FaultTolerantWriteDxe/FaultTolerantWriteSmm.inf +++ b/MdeModulePkg/Universal/FaultTolerantWriteDxe/FaultTolerantWriteSmm.inf @@ -55,6 +55,7 @@ PcdLib
ReportStatusCodeLib
SmmMemLib
+ BaseLib
[Guids]
#
|