Install the callback of gEfiPeiMemoryDiscoveredPpiGuid
to create gEdkiiVariableRuntimeCacheInfoHobGuid in
VariablePei module. When PcdEnableVariableRuntimeCache
is TRUE, the callback will be installed to allocate
the needed buffer for different type variable runtime
cache, unblock the buffer and build this HOB. Then the
runtime cache buffer address and size will be saved in
the HOB content.
Signed-off-by: Dun Tan
Cc: Ray Ni
Cc: Liming Gao
Cc: Jiaxin Wu
---
MdeModulePkg/Universal/Variable/Pei/Variable.c | 298
+-
MdeModulePkg/Universal/Variable/Pei/Variable.h | 3 +++
MdeModulePkg/Universal/Variable/Pei/VariablePei.inf | 8 +++-
3 files changed, 307 insertions(+), 2 deletions(-)
diff --git a/MdeModulePkg/Universal/Variable/Pei/Variable.c
b/MdeModulePkg/Universal/Variable/Pei/Variable.c
index 26a4c73b45..15419eb437 100644
--- a/MdeModulePkg/Universal/Variable/Pei/Variable.c
+++ b/MdeModulePkg/Universal/Variable/Pei/Variable.c
@@ -2,7 +2,7 @@
Implement ReadOnly Variable Services required by PEIM and install
PEI ReadOnly Varaiable2 PPI. These services operates the non volatile
storage space.
-Copyright (c) 2006 - 2019, Intel Corporation. All rights reserved.
+Copyright (c) 2006 - 2024, Intel Corporation. All rights reserved.
Copyright (c) Microsoft Corporation.
SPDX-License-Identifier: BSD-2-Clause-Patent
@@ -24,6 +24,31 @@ EFI_PEI_PPI_DESCRIPTOR mPpiListVariable = {
};
+/**
+ Build gEdkiiVariableRuntimeCacheInfoHobGuid.
+
+ @param[in] PeiServices General purpose services available to every
PEIM.
+ @param[in] NotifyDescriptor The notification structure this PEIM
registered on install.
+ @param[in] Ppi The memory discovered PPI. Not used.
+
+ @retval EFI_SUCCESS The function completed successfully.
+ @retval others Failed to build VariableRuntimeCacheInfo Hob.
+
+**/
+EFI_STATUS
+EFIAPI
+BuildVariableRuntimeCacheInfoHob (
+ IN EFI_PEI_SERVICES **PeiServices,
+ IN EFI_PEI_NOTIFY_DESCRIPTOR *NotifyDescriptor,
+ IN VOID *Ppi
+ );
+
+EFI_PEI_NOTIFY_DESCRIPTOR mPostMemNotifyList = {
+ (EFI_PEI_PPI_DESCRIPTOR_NOTIFY_CALLBACK |
EFI_PEI_PPI_DESCRIPTOR_TERMINATE_LIST),
+ ,
+ BuildVariableRuntimeCacheInfoHob
+};
+
/**
Provide the functionality of the variable services.
@@ -41,6 +66,10 @@ PeimInitializeVariableServices (
IN CONST EFI_PEI_SERVICES **PeiServices
)
{
+ if (FeaturePcdGet (PcdEnableVariableRuntimeCache)) {
+PeiServicesNotifyPpi ();
+ }
+
return PeiServicesInstallPpi ();
}
@@ -1250,3 +1279,270 @@ PeiGetNextVariableName (
}
}
}
+
+/**
+ Calculate the auth variable storage size converted from normal variable
storage.
+
+ @param[in] StoreInfo Pointer to the store info
+ @param[in] NormalHobVarStorage Pointer to the normal variable storage
header
+
+ @retval the auth variable storage size
+**/
+UINTN
+CalculateAuthVarStorageSize (
+ IN VARIABLE_STORE_INFO*StoreInfo,
+ IN VARIABLE_STORE_HEADER *NormalHobVarStorage
+ )
+{
+ VARIABLE_HEADER *StartPtr;
+ VARIABLE_HEADER *EndPtr;
+ UINTNAuthVarStroageSize;
+
+ AuthVarStroageSize = sizeof (VARIABLE_STORE_HEADER);
+
+ //
+ // Calculate Auth Variable Storage Size
+ //
+ StartPtr = GetStartPointer (NormalHobVarStorage);
+ EndPtr = GetEndPointer (NormalHobVarStorage);
+ while (StartPtr < EndPtr) {
+if (StartPtr->State == VAR_ADDED) {
+ AuthVarStroageSize = HEADER_ALIGN (AuthVarStroageSize);
+ AuthVarStroageSize += sizeof (AUTHENTICATED_VARIABLE_HEADER);
+ AuthVarStroageSize += StartPtr->NameSize + GET_PAD_SIZE
(StartPtr->NameSize);
+ AuthVarStroageSize += StartPtr->DataSize + GET_PAD_SIZE
(StartPtr->DataSize);
+}
+
+StartPtr = GetNextVariablePtr (StoreInfo, StartPtr, StartPtr);
+ }
+
+ return AuthVarStroageSize;
+}
+
+/**
+ Calculate Hob variable cache size.
+
+ @param[in] NvAuthFlag If the NV variable store is Auth.
+
+ @retval Maximum of Nv variable cache size.
+
+**/
+UINTN
+CalculateHobVariableCacheSize (
+ IN BOOLEAN NvAuthFlag
+ )
+{
+ VARIABLE_STORE_INFOStoreInfo;
+ VARIABLE_STORE_HEADER *VariableStoreHeader;
+
+ VariableStoreHeader = NULL;
+ GetHobVariableStore (, );
+
+ if (VariableStoreHeader == NULL) {
+return 0;
+ }
+
+ if (NvAuthFlag == StoreInfo.AuthFlag) {
+return VariableStoreHeader->Size;
+ } else {
+//
+// Normal NV variable store + Auth HOB variable store is not supported
+//
+ASSERT (NvAuthFlag && (!StoreInfo.AuthFlag));
+
+//
+// Need to calculate auth variable storage size converted from normal
variable storage
+//
+
