[edk2-devel] [edk2-platforms][PATCH 1/1] AmpereAltraPkg/FlashFvbDxe: Sync up NVRAM FV with NVRAM cached

["Nhi Pham via groups.io" <nhi=os.amperecomputing.com@groups.io>]

From: Tam Chi Nguyen <tamnguyenchi@os.amperecomputing.com>

Currently, the NVRAM FV region is only updated once at FlashPei that makes
the data in NVRAM FV outdated with data in NVRAM region in SPI-NOR.
It causes the duplication of the valid NV variables when the Variable
Reclaim process performs. Consequently, after rebooting, system goes to
an infinite loop at GetNextVariableName.

It requires the data in NVRAM FV to be synced up with NVRAM cache in memory
that is managed by VariableDxe.

Signed-off-by: Nhi Pham <nhi@os.amperecomputing.com>
---
 Silicon/Ampere/AmpereAltraPkg/Drivers/FlashFvbDxe/FlashFvbDxe.inf | 1 +
 Silicon/Ampere/AmpereAltraPkg/Drivers/FlashFvbDxe/FlashFvbDxe.c   | 3 +++
 2 files changed, 4 insertions(+)

diff --git a/Silicon/Ampere/AmpereAltraPkg/Drivers/FlashFvbDxe/FlashFvbDxe.inf b/Silicon/Ampere/AmpereAltraPkg/Drivers/FlashFvbDxe/FlashFvbDxe.inf
index 008fd2315ffe..5f537cf7df27 100644
--- a/Silicon/Ampere/AmpereAltraPkg/Drivers/FlashFvbDxe/FlashFvbDxe.inf
+++ b/Silicon/Ampere/AmpereAltraPkg/Drivers/FlashFvbDxe/FlashFvbDxe.inf
@@ -25,6 +25,7 @@ [Packages]
   Silicon/Ampere/AmpereSiliconPkg/AmpereSiliconPkg.dec
 
 [LibraryClasses]
+  BaseMemoryLib
   DebugLib
   FlashLib
   PcdLib
diff --git a/Silicon/Ampere/AmpereAltraPkg/Drivers/FlashFvbDxe/FlashFvbDxe.c b/Silicon/Ampere/AmpereAltraPkg/Drivers/FlashFvbDxe/FlashFvbDxe.c
index 009694703ddd..853c458e375f 100644
--- a/Silicon/Ampere/AmpereAltraPkg/Drivers/FlashFvbDxe/FlashFvbDxe.c
+++ b/Silicon/Ampere/AmpereAltraPkg/Drivers/FlashFvbDxe/FlashFvbDxe.c
@@ -6,6 +6,7 @@
 
 **/
 
+#include <Library/BaseMemoryLib.h>
 #include <Library/DebugLib.h>
 #include <Library/FlashLib.h>
 #include <Library/PcdLib.h>
@@ -361,6 +362,8 @@ FlashFvbDxeWrite (
     return EFI_DEVICE_ERROR;
   }
 
+  CopyMem ((UINT8 *)(UINTN)mNvStorageBase + Lba * mFlashBlockSize + Offset, Buffer, *NumBytes);
+
   return Status;
 }
 
-- 
2.25.1



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