From a37044efba8c6b21c2d919f6ca306fcc69c1f59d Mon Sep 17 00:00:00 2001 From: Liming Gao Date: Fri, 22 Dec 2017 12:44:19 +0800 Subject: MdeModulePkg VariableDxe: Update it supports normal format variable storage PEI may report the normal format variable storage HOB for the default EFI variable. VariableDxe needs to support it and set them into NV variable region. Contributed-under: TianoCore Contribution Agreement 1.1 Signed-off-by: Liming Gao Reviewed-by: Star Zeng --- .../Universal/Variable/RuntimeDxe/Variable.c | 113 ++++++++++++++++++++- 1 file changed, 112 insertions(+), 1 deletion(-) (limited to 'MdeModulePkg/Universal/Variable/RuntimeDxe/Variable.c') diff --git a/MdeModulePkg/Universal/Variable/RuntimeDxe/Variable.c b/MdeModulePkg/Universal/Variable/RuntimeDxe/Variable.c index 793bdad3b9..77905a0a30 100644 --- a/MdeModulePkg/Universal/Variable/RuntimeDxe/Variable.c +++ b/MdeModulePkg/Universal/Variable/RuntimeDxe/Variable.c @@ -4036,7 +4036,105 @@ VariableWriteServiceInitialize ( return Status; } +/** + Convert normal variable storage to the allocated auth variable storage. + + @param[in] NormalVarStorage Pointer to the normal variable storage header + + @retval the allocated auth variable storage +**/ +VOID * +ConvertNormalVarStorageToAuthVarStorage ( + VARIABLE_STORE_HEADER *NormalVarStorage + ) +{ + VARIABLE_HEADER *StartPtr; + UINT8 *NextPtr; + VARIABLE_HEADER *EndPtr; + UINTN AuthVarStroageSize; + AUTHENTICATED_VARIABLE_HEADER *AuthStartPtr; + VARIABLE_STORE_HEADER *AuthVarStorage; + + AuthVarStroageSize = sizeof (VARIABLE_STORE_HEADER); + // + // Set AuthFormat as FALSE for normal variable storage + // + mVariableModuleGlobal->VariableGlobal.AuthFormat = FALSE; + + // + // Calculate Auth Variable Storage Size + // + StartPtr = GetStartPointer (NormalVarStorage); + EndPtr = GetEndPointer (NormalVarStorage); + 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 (StartPtr); + } + + // + // Allocate Runtime memory for Auth Variable Storage + // + AuthVarStorage = AllocateRuntimeZeroPool (AuthVarStroageSize); + ASSERT (AuthVarStorage != NULL); + if (AuthVarStorage == NULL) { + return NULL; + } + + // + // Copy Variable from Normal storage to Auth storage + // + StartPtr = GetStartPointer (NormalVarStorage); + EndPtr = GetEndPointer (NormalVarStorage); + AuthStartPtr = (AUTHENTICATED_VARIABLE_HEADER *) GetStartPointer (AuthVarStorage); + while (StartPtr < EndPtr) { + if (StartPtr->State == VAR_ADDED) { + AuthStartPtr = (AUTHENTICATED_VARIABLE_HEADER *) HEADER_ALIGN (AuthStartPtr); + // + // Copy Variable Header + // + AuthStartPtr->StartId = StartPtr->StartId; + AuthStartPtr->State = StartPtr->State; + AuthStartPtr->Attributes = StartPtr->Attributes; + AuthStartPtr->NameSize = StartPtr->NameSize; + AuthStartPtr->DataSize = StartPtr->DataSize; + CopyGuid (&AuthStartPtr->VendorGuid, &StartPtr->VendorGuid); + // + // Copy Variable Name + // + NextPtr = (UINT8 *) (AuthStartPtr + 1); + CopyMem (NextPtr, GetVariableNamePtr (StartPtr), AuthStartPtr->NameSize); + // + // Copy Variable Data + // + NextPtr = NextPtr + AuthStartPtr->NameSize + GET_PAD_SIZE (AuthStartPtr->NameSize); + CopyMem (NextPtr, GetVariableDataPtr (StartPtr), AuthStartPtr->DataSize); + // + // Go to next variable + // + AuthStartPtr = (AUTHENTICATED_VARIABLE_HEADER *) (NextPtr + AuthStartPtr->DataSize + GET_PAD_SIZE (AuthStartPtr->DataSize)); + } + StartPtr = GetNextVariablePtr (StartPtr); + } + // + // Update Auth Storage Header + // + AuthVarStorage->Format = NormalVarStorage->Format; + AuthVarStorage->State = NormalVarStorage->State; + AuthVarStorage->Size = (UINT32) (UINTN) ((UINT8 *) AuthStartPtr - (UINT8 *) AuthVarStorage); + CopyGuid (&AuthVarStorage->Signature, &gEfiAuthenticatedVariableGuid); + ASSERT (AuthVarStorage->Size <= AuthVarStroageSize); + // + // Restore AuthFormat + // + mVariableModuleGlobal->VariableGlobal.AuthFormat = TRUE; + return AuthVarStorage; +} /** Initializes variable store area for non-volatile and volatile variable. @@ -4057,6 +4155,7 @@ VariableCommonInitialize ( EFI_HOB_GUID_TYPE *GuidHob; EFI_GUID *VariableGuid; EFI_FIRMWARE_VOLUME_HEADER *NvFvHeader; + BOOLEAN IsNormalVariableHob; // // Allocate runtime memory for variable driver global structure. @@ -4098,12 +4197,24 @@ VariableCommonInitialize ( // // Get HOB variable store. // + IsNormalVariableHob = FALSE; GuidHob = GetFirstGuidHob (VariableGuid); + if (GuidHob == NULL && VariableGuid == &gEfiAuthenticatedVariableGuid) { + // + // Try getting it from normal variable HOB + // + GuidHob = GetFirstGuidHob (&gEfiVariableGuid); + IsNormalVariableHob = TRUE; + } if (GuidHob != NULL) { VariableStoreHeader = GET_GUID_HOB_DATA (GuidHob); VariableStoreLength = GuidHob->Header.HobLength - sizeof (EFI_HOB_GUID_TYPE); if (GetVariableStoreStatus (VariableStoreHeader) == EfiValid) { - mVariableModuleGlobal->VariableGlobal.HobVariableBase = (EFI_PHYSICAL_ADDRESS) (UINTN) AllocateRuntimeCopyPool ((UINTN) VariableStoreLength, (VOID *) VariableStoreHeader); + if (IsNormalVariableHob == FALSE) { + mVariableModuleGlobal->VariableGlobal.HobVariableBase = (EFI_PHYSICAL_ADDRESS) (UINTN) AllocateRuntimeCopyPool ((UINTN) VariableStoreLength, (VOID *) VariableStoreHeader); + } else { + mVariableModuleGlobal->VariableGlobal.HobVariableBase = (EFI_PHYSICAL_ADDRESS) (UINTN) ConvertNormalVarStorageToAuthVarStorage ((VOID *) VariableStoreHeader); + } if (mVariableModuleGlobal->VariableGlobal.HobVariableBase == 0) { FreePool (NvFvHeader); FreePool (mVariableModuleGlobal); -- cgit v1.2.3