+++ /dev/null
-/** @file\r
- The common variable operation routines shared by DXE_RUNTIME variable\r
- module and DXE_SMM variable module.\r
-\r
- Caution: This module requires additional review when modified.\r
- This driver will have external input - variable data. They may be input in SMM mode.\r
- This external input must be validated carefully to avoid security issue like\r
- buffer overflow, integer overflow.\r
-\r
- VariableServiceGetNextVariableName () and VariableServiceQueryVariableInfo() are external API.\r
- They need check input parameter.\r
-\r
- VariableServiceGetVariable() and VariableServiceSetVariable() are external API\r
- to receive datasize and data buffer. The size should be checked carefully.\r
-\r
- VariableServiceSetVariable() should also check authenticate data to avoid buffer overflow,\r
- integer overflow. It should also check attribute to avoid authentication bypass.\r
-\r
-Copyright (c) 2009 - 2015, Intel Corporation. All rights reserved.<BR>\r
-This program and the accompanying materials\r
-are licensed and made available under the terms and conditions of the BSD License\r
-which accompanies this distribution. The full text of the license may be found at\r
-http://opensource.org/licenses/bsd-license.php\r
-\r
-THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,\r
-WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.\r
-\r
-**/\r
-\r
-#include "Variable.h"\r
-#include "AuthService.h"\r
-\r
-VARIABLE_MODULE_GLOBAL *mVariableModuleGlobal;\r
-\r
-///\r
-/// Define a memory cache that improves the search performance for a variable.\r
-///\r
-VARIABLE_STORE_HEADER *mNvVariableCache = NULL;\r
-\r
-///\r
-/// The memory entry used for variable statistics data.\r
-///\r
-VARIABLE_INFO_ENTRY *gVariableInfo = NULL;\r
-\r
-///\r
-/// The list to store the variables which cannot be set after the EFI_END_OF_DXE_EVENT_GROUP_GUID\r
-/// or EVT_GROUP_READY_TO_BOOT event.\r
-///\r
-LIST_ENTRY mLockedVariableList = INITIALIZE_LIST_HEAD_VARIABLE (mLockedVariableList);\r
-\r
-///\r
-/// The flag to indicate whether the platform has left the DXE phase of execution.\r
-///\r
-BOOLEAN mEndOfDxe = FALSE;\r
-\r
-///\r
-/// The flag to indicate whether the variable storage locking is enabled.\r
-///\r
-BOOLEAN mEnableLocking = TRUE;\r
-\r
-//\r
-// It will record the current boot error flag before EndOfDxe.\r
-//\r
-VAR_ERROR_FLAG mCurrentBootVarErrFlag = VAR_ERROR_FLAG_NO_ERROR;\r
-\r
-/**\r
-\r
- SecureBoot Hook for auth variable update.\r
-\r
- @param[in] VariableName Name of Variable to be found.\r
- @param[in] VendorGuid Variable vendor GUID.\r
-**/\r
-VOID\r
-EFIAPI\r
-SecureBootHook (\r
- IN CHAR16 *VariableName,\r
- IN EFI_GUID *VendorGuid\r
- );\r
-\r
-/**\r
- Routine used to track statistical information about variable usage.\r
- The data is stored in the EFI system table so it can be accessed later.\r
- VariableInfo.efi can dump out the table. Only Boot Services variable\r
- accesses are tracked by this code. The PcdVariableCollectStatistics\r
- build flag controls if this feature is enabled.\r
-\r
- A read that hits in the cache will have Read and Cache true for\r
- the transaction. Data is allocated by this routine, but never\r
- freed.\r
-\r
- @param[in] VariableName Name of the Variable to track.\r
- @param[in] VendorGuid Guid of the Variable to track.\r
- @param[in] Volatile TRUE if volatile FALSE if non-volatile.\r
- @param[in] Read TRUE if GetVariable() was called.\r
- @param[in] Write TRUE if SetVariable() was called.\r
- @param[in] Delete TRUE if deleted via SetVariable().\r
- @param[in] Cache TRUE for a cache hit.\r
-\r
-**/\r
-VOID\r
-UpdateVariableInfo (\r
- IN CHAR16 *VariableName,\r
- IN EFI_GUID *VendorGuid,\r
- IN BOOLEAN Volatile,\r
- IN BOOLEAN Read,\r
- IN BOOLEAN Write,\r
- IN BOOLEAN Delete,\r
- IN BOOLEAN Cache\r
- )\r
-{\r
- VARIABLE_INFO_ENTRY *Entry;\r
-\r
- if (FeaturePcdGet (PcdVariableCollectStatistics)) {\r
-\r
- if (AtRuntime ()) {\r
- // Don't collect statistics at runtime.\r
- return;\r
- }\r
-\r
- if (gVariableInfo == NULL) {\r
- //\r
- // On the first call allocate a entry and place a pointer to it in\r
- // the EFI System Table.\r
- //\r
- gVariableInfo = AllocateZeroPool (sizeof (VARIABLE_INFO_ENTRY));\r
- ASSERT (gVariableInfo != NULL);\r
-\r
- CopyGuid (&gVariableInfo->VendorGuid, VendorGuid);\r
- gVariableInfo->Name = AllocatePool (StrSize (VariableName));\r
- ASSERT (gVariableInfo->Name != NULL);\r
- StrCpy (gVariableInfo->Name, VariableName);\r
- gVariableInfo->Volatile = Volatile;\r
- }\r
-\r
-\r
- for (Entry = gVariableInfo; Entry != NULL; Entry = Entry->Next) {\r
- if (CompareGuid (VendorGuid, &Entry->VendorGuid)) {\r
- if (StrCmp (VariableName, Entry->Name) == 0) {\r
- if (Read) {\r
- Entry->ReadCount++;\r
- }\r
- if (Write) {\r
- Entry->WriteCount++;\r
- }\r
- if (Delete) {\r
- Entry->DeleteCount++;\r
- }\r
- if (Cache) {\r
- Entry->CacheCount++;\r
- }\r
-\r
- return;\r
- }\r
- }\r
-\r
- if (Entry->Next == NULL) {\r
- //\r
- // If the entry is not in the table add it.\r
- // Next iteration of the loop will fill in the data.\r
- //\r
- Entry->Next = AllocateZeroPool (sizeof (VARIABLE_INFO_ENTRY));\r
- ASSERT (Entry->Next != NULL);\r
-\r
- CopyGuid (&Entry->Next->VendorGuid, VendorGuid);\r
- Entry->Next->Name = AllocatePool (StrSize (VariableName));\r
- ASSERT (Entry->Next->Name != NULL);\r
- StrCpy (Entry->Next->Name, VariableName);\r
- Entry->Next->Volatile = Volatile;\r
- }\r
-\r
- }\r
- }\r
-}\r
-\r
-\r
-/**\r
-\r
- This code checks if variable header is valid or not.\r
-\r
- @param Variable Pointer to the Variable Header.\r
- @param VariableStoreEnd Pointer to the Variable Store End.\r
-\r
- @retval TRUE Variable header is valid.\r
- @retval FALSE Variable header is not valid.\r
-\r
-**/\r
-BOOLEAN\r
-IsValidVariableHeader (\r
- IN VARIABLE_HEADER *Variable,\r
- IN VARIABLE_HEADER *VariableStoreEnd\r
- )\r
-{\r
- if ((Variable == NULL) || (Variable >= VariableStoreEnd) || (Variable->StartId != VARIABLE_DATA)) {\r
- //\r
- // Variable is NULL or has reached the end of variable store,\r
- // or the StartId is not correct.\r
- //\r
- return FALSE;\r
- }\r
-\r
- return TRUE;\r
-}\r
-\r
-\r
-/**\r
-\r
- This function writes data to the FWH at the correct LBA even if the LBAs\r
- are fragmented.\r
-\r
- @param Global Pointer to VARAIBLE_GLOBAL structure.\r
- @param Volatile Point out the Variable is Volatile or Non-Volatile.\r
- @param SetByIndex TRUE if target pointer is given as index.\r
- FALSE if target pointer is absolute.\r
- @param Fvb Pointer to the writable FVB protocol.\r
- @param DataPtrIndex Pointer to the Data from the end of VARIABLE_STORE_HEADER\r
- structure.\r
- @param DataSize Size of data to be written.\r
- @param Buffer Pointer to the buffer from which data is written.\r
-\r
- @retval EFI_INVALID_PARAMETER Parameters not valid.\r
- @retval EFI_SUCCESS Variable store successfully updated.\r
-\r
-**/\r
-EFI_STATUS\r
-UpdateVariableStore (\r
- IN VARIABLE_GLOBAL *Global,\r
- IN BOOLEAN Volatile,\r
- IN BOOLEAN SetByIndex,\r
- IN EFI_FIRMWARE_VOLUME_BLOCK_PROTOCOL *Fvb,\r
- IN UINTN DataPtrIndex,\r
- IN UINT32 DataSize,\r
- IN UINT8 *Buffer\r
- )\r
-{\r
- EFI_FV_BLOCK_MAP_ENTRY *PtrBlockMapEntry;\r
- UINTN BlockIndex2;\r
- UINTN LinearOffset;\r
- UINTN CurrWriteSize;\r
- UINTN CurrWritePtr;\r
- UINT8 *CurrBuffer;\r
- EFI_LBA LbaNumber;\r
- UINTN Size;\r
- EFI_FIRMWARE_VOLUME_HEADER *FwVolHeader;\r
- VARIABLE_STORE_HEADER *VolatileBase;\r
- EFI_PHYSICAL_ADDRESS FvVolHdr;\r
- EFI_PHYSICAL_ADDRESS DataPtr;\r
- EFI_STATUS Status;\r
-\r
- FwVolHeader = NULL;\r
- DataPtr = DataPtrIndex;\r
-\r
- //\r
- // Check if the Data is Volatile.\r
- //\r
- if (!Volatile) {\r
- if (Fvb == NULL) {\r
- return EFI_INVALID_PARAMETER;\r
- }\r
- Status = Fvb->GetPhysicalAddress(Fvb, &FvVolHdr);\r
- ASSERT_EFI_ERROR (Status);\r
-\r
- FwVolHeader = (EFI_FIRMWARE_VOLUME_HEADER *) ((UINTN) FvVolHdr);\r
- //\r
- // Data Pointer should point to the actual Address where data is to be\r
- // written.\r
- //\r
- if (SetByIndex) {\r
- DataPtr += mVariableModuleGlobal->VariableGlobal.NonVolatileVariableBase;\r
- }\r
-\r
- if ((DataPtr + DataSize) >= ((EFI_PHYSICAL_ADDRESS) (UINTN) ((UINT8 *) FwVolHeader + FwVolHeader->FvLength))) {\r
- return EFI_INVALID_PARAMETER;\r
- }\r
- } else {\r
- //\r
- // Data Pointer should point to the actual Address where data is to be\r
- // written.\r
- //\r
- VolatileBase = (VARIABLE_STORE_HEADER *) ((UINTN) mVariableModuleGlobal->VariableGlobal.VolatileVariableBase);\r
- if (SetByIndex) {\r
- DataPtr += mVariableModuleGlobal->VariableGlobal.VolatileVariableBase;\r
- }\r
-\r
- if ((DataPtr + DataSize) >= ((UINTN) ((UINT8 *) VolatileBase + VolatileBase->Size))) {\r
- return EFI_INVALID_PARAMETER;\r
- }\r
-\r
- //\r
- // If Volatile Variable just do a simple mem copy.\r
- //\r
- CopyMem ((UINT8 *)(UINTN)DataPtr, Buffer, DataSize);\r
- return EFI_SUCCESS;\r
- }\r
-\r
- //\r
- // If we are here we are dealing with Non-Volatile Variables.\r
- //\r
- LinearOffset = (UINTN) FwVolHeader;\r
- CurrWritePtr = (UINTN) DataPtr;\r
- CurrWriteSize = DataSize;\r
- CurrBuffer = Buffer;\r
- LbaNumber = 0;\r
-\r
- if (CurrWritePtr < LinearOffset) {\r
- return EFI_INVALID_PARAMETER;\r
- }\r
-\r
- for (PtrBlockMapEntry = FwVolHeader->BlockMap; PtrBlockMapEntry->NumBlocks != 0; PtrBlockMapEntry++) {\r
- for (BlockIndex2 = 0; BlockIndex2 < PtrBlockMapEntry->NumBlocks; BlockIndex2++) {\r
- //\r
- // Check to see if the Variable Writes are spanning through multiple\r
- // blocks.\r
- //\r
- if ((CurrWritePtr >= LinearOffset) && (CurrWritePtr < LinearOffset + PtrBlockMapEntry->Length)) {\r
- if ((CurrWritePtr + CurrWriteSize) <= (LinearOffset + PtrBlockMapEntry->Length)) {\r
- Status = Fvb->Write (\r
- Fvb,\r
- LbaNumber,\r
- (UINTN) (CurrWritePtr - LinearOffset),\r
- &CurrWriteSize,\r
- CurrBuffer\r
- );\r
- return Status;\r
- } else {\r
- Size = (UINT32) (LinearOffset + PtrBlockMapEntry->Length - CurrWritePtr);\r
- Status = Fvb->Write (\r
- Fvb,\r
- LbaNumber,\r
- (UINTN) (CurrWritePtr - LinearOffset),\r
- &Size,\r
- CurrBuffer\r
- );\r
- if (EFI_ERROR (Status)) {\r
- return Status;\r
- }\r
-\r
- CurrWritePtr = LinearOffset + PtrBlockMapEntry->Length;\r
- CurrBuffer = CurrBuffer + Size;\r
- CurrWriteSize = CurrWriteSize - Size;\r
- }\r
- }\r
-\r
- LinearOffset += PtrBlockMapEntry->Length;\r
- LbaNumber++;\r
- }\r
- }\r
-\r
- return EFI_SUCCESS;\r
-}\r
-\r
-\r
-/**\r
-\r
- This code gets the current status of Variable Store.\r
-\r
- @param VarStoreHeader Pointer to the Variable Store Header.\r
-\r
- @retval EfiRaw Variable store status is raw.\r
- @retval EfiValid Variable store status is valid.\r
- @retval EfiInvalid Variable store status is invalid.\r
-\r
-**/\r
-VARIABLE_STORE_STATUS\r
-GetVariableStoreStatus (\r
- IN VARIABLE_STORE_HEADER *VarStoreHeader\r
- )\r
-{\r
- if (CompareGuid (&VarStoreHeader->Signature, &gEfiAuthenticatedVariableGuid) &&\r
- VarStoreHeader->Format == VARIABLE_STORE_FORMATTED &&\r
- VarStoreHeader->State == VARIABLE_STORE_HEALTHY\r
- ) {\r
-\r
- return EfiValid;\r
- } else if (((UINT32 *)(&VarStoreHeader->Signature))[0] == 0xffffffff &&\r
- ((UINT32 *)(&VarStoreHeader->Signature))[1] == 0xffffffff &&\r
- ((UINT32 *)(&VarStoreHeader->Signature))[2] == 0xffffffff &&\r
- ((UINT32 *)(&VarStoreHeader->Signature))[3] == 0xffffffff &&\r
- VarStoreHeader->Size == 0xffffffff &&\r
- VarStoreHeader->Format == 0xff &&\r
- VarStoreHeader->State == 0xff\r
- ) {\r
-\r
- return EfiRaw;\r
- } else {\r
- return EfiInvalid;\r
- }\r
-}\r
-\r
-\r
-/**\r
-\r
- This code gets the size of name of variable.\r
-\r
- @param Variable Pointer to the Variable Header.\r
-\r
- @return UINTN Size of variable in bytes.\r
-\r
-**/\r
-UINTN\r
-NameSizeOfVariable (\r
- IN VARIABLE_HEADER *Variable\r
- )\r
-{\r
- if (Variable->State == (UINT8) (-1) ||\r
- Variable->DataSize == (UINT32) (-1) ||\r
- Variable->NameSize == (UINT32) (-1) ||\r
- Variable->Attributes == (UINT32) (-1)) {\r
- return 0;\r
- }\r
- return (UINTN) Variable->NameSize;\r
-}\r
-\r
-/**\r
-\r
- This code gets the size of variable data.\r
-\r
- @param Variable Pointer to the Variable Header.\r
-\r
- @return Size of variable in bytes.\r
-\r
-**/\r
-UINTN\r
-DataSizeOfVariable (\r
- IN VARIABLE_HEADER *Variable\r
- )\r
-{\r
- if (Variable->State == (UINT8) (-1) ||\r
- Variable->DataSize == (UINT32) (-1) ||\r
- Variable->NameSize == (UINT32) (-1) ||\r
- Variable->Attributes == (UINT32) (-1)) {\r
- return 0;\r
- }\r
- return (UINTN) Variable->DataSize;\r
-}\r
-\r
-/**\r
-\r
- This code gets the pointer to the variable name.\r
-\r
- @param Variable Pointer to the Variable Header.\r
-\r
- @return Pointer to Variable Name which is Unicode encoding.\r
-\r
-**/\r
-CHAR16 *\r
-GetVariableNamePtr (\r
- IN VARIABLE_HEADER *Variable\r
- )\r
-{\r
-\r
- return (CHAR16 *) (Variable + 1);\r
-}\r
-\r
-/**\r
-\r
- This code gets the pointer to the variable data.\r
-\r
- @param Variable Pointer to the Variable Header.\r
-\r
- @return Pointer to Variable Data.\r
-\r
-**/\r
-UINT8 *\r
-GetVariableDataPtr (\r
- IN VARIABLE_HEADER *Variable\r
- )\r
-{\r
- UINTN Value;\r
-\r
- //\r
- // Be careful about pad size for alignment.\r
- //\r
- Value = (UINTN) GetVariableNamePtr (Variable);\r
- Value += NameSizeOfVariable (Variable);\r
- Value += GET_PAD_SIZE (NameSizeOfVariable (Variable));\r
-\r
- return (UINT8 *) Value;\r
-}\r
-\r
-\r
-/**\r
-\r
- This code gets the pointer to the next variable header.\r
-\r
- @param Variable Pointer to the Variable Header.\r
-\r
- @return Pointer to next variable header.\r
-\r
-**/\r
-VARIABLE_HEADER *\r
-GetNextVariablePtr (\r
- IN VARIABLE_HEADER *Variable\r
- )\r
-{\r
- UINTN Value;\r
-\r
- Value = (UINTN) GetVariableDataPtr (Variable);\r
- Value += DataSizeOfVariable (Variable);\r
- Value += GET_PAD_SIZE (DataSizeOfVariable (Variable));\r
-\r
- //\r
- // Be careful about pad size for alignment.\r
- //\r
- return (VARIABLE_HEADER *) HEADER_ALIGN (Value);\r
-}\r
-\r
-/**\r
-\r
- Gets the pointer to the first variable header in given variable store area.\r
-\r
- @param VarStoreHeader Pointer to the Variable Store Header.\r
-\r
- @return Pointer to the first variable header.\r
-\r
-**/\r
-VARIABLE_HEADER *\r
-GetStartPointer (\r
- IN VARIABLE_STORE_HEADER *VarStoreHeader\r
- )\r
-{\r
- //\r
- // The end of variable store.\r
- //\r
- return (VARIABLE_HEADER *) HEADER_ALIGN (VarStoreHeader + 1);\r
-}\r
-\r
-/**\r
-\r
- Gets the pointer to the end of the variable storage area.\r
-\r
- This function gets pointer to the end of the variable storage\r
- area, according to the input variable store header.\r
-\r
- @param VarStoreHeader Pointer to the Variable Store Header.\r
-\r
- @return Pointer to the end of the variable storage area.\r
-\r
-**/\r
-VARIABLE_HEADER *\r
-GetEndPointer (\r
- IN VARIABLE_STORE_HEADER *VarStoreHeader\r
- )\r
-{\r
- //\r
- // The end of variable store\r
- //\r
- return (VARIABLE_HEADER *) HEADER_ALIGN ((UINTN) VarStoreHeader + VarStoreHeader->Size);\r
-}\r
-\r
-/**\r
- Record variable error flag.\r
-\r
- @param[in] Flag Variable error flag to record.\r
- @param[in] VariableName Name of variable.\r
- @param[in] VendorGuid Guid of variable.\r
- @param[in] Attributes Attributes of the variable.\r
- @param[in] VariableSize Size of the variable.\r
-\r
-**/\r
-VOID\r
-RecordVarErrorFlag (\r
- IN VAR_ERROR_FLAG Flag,\r
- IN CHAR16 *VariableName,\r
- IN EFI_GUID *VendorGuid,\r
- IN UINT32 Attributes,\r
- IN UINTN VariableSize\r
- )\r
-{\r
- EFI_STATUS Status;\r
- VARIABLE_POINTER_TRACK Variable;\r
- VAR_ERROR_FLAG *VarErrFlag;\r
- VAR_ERROR_FLAG TempFlag;\r
-\r
- DEBUG_CODE (\r
- DEBUG ((EFI_D_ERROR, "RecordVarErrorFlag (0x%02x) %s:%g - 0x%08x - 0x%x\n", Flag, VariableName, VendorGuid, Attributes, VariableSize));\r
- if (Flag == VAR_ERROR_FLAG_SYSTEM_ERROR) {\r
- if (AtRuntime ()) {\r
- DEBUG ((EFI_D_ERROR, "CommonRuntimeVariableSpace = 0x%x - CommonVariableTotalSize = 0x%x\n", mVariableModuleGlobal->CommonRuntimeVariableSpace, mVariableModuleGlobal->CommonVariableTotalSize));\r
- } else {\r
- DEBUG ((EFI_D_ERROR, "CommonVariableSpace = 0x%x - CommonVariableTotalSize = 0x%x\n", mVariableModuleGlobal->CommonVariableSpace, mVariableModuleGlobal->CommonVariableTotalSize));\r
- }\r
- } else {\r
- DEBUG ((EFI_D_ERROR, "CommonMaxUserVariableSpace = 0x%x - CommonUserVariableTotalSize = 0x%x\n", mVariableModuleGlobal->CommonMaxUserVariableSpace, mVariableModuleGlobal->CommonUserVariableTotalSize));\r
- }\r
- );\r
-\r
- if (!mEndOfDxe) {\r
- //\r
- // Before EndOfDxe, just record the current boot variable error flag to local variable,\r
- // and leave the variable error flag in NV flash as the last boot variable error flag.\r
- // After EndOfDxe in InitializeVarErrorFlag (), the variable error flag in NV flash\r
- // will be initialized to this local current boot variable error flag.\r
- //\r
- mCurrentBootVarErrFlag &= Flag;\r
- return;\r
- }\r
-\r
- //\r
- // Record error flag (it should have be initialized).\r
- //\r
- Status = FindVariable (\r
- VAR_ERROR_FLAG_NAME,\r
- &gEdkiiVarErrorFlagGuid,\r
- &Variable,\r
- &mVariableModuleGlobal->VariableGlobal,\r
- FALSE\r
- );\r
- if (!EFI_ERROR (Status)) {\r
- VarErrFlag = (VAR_ERROR_FLAG *) GetVariableDataPtr (Variable.CurrPtr);\r
- TempFlag = *VarErrFlag;\r
- TempFlag &= Flag;\r
- if (TempFlag == *VarErrFlag) {\r
- return;\r
- }\r
- Status = UpdateVariableStore (\r
- &mVariableModuleGlobal->VariableGlobal,\r
- FALSE,\r
- FALSE,\r
- mVariableModuleGlobal->FvbInstance,\r
- (UINTN) VarErrFlag - (UINTN) mNvVariableCache + (UINTN) mVariableModuleGlobal->VariableGlobal.NonVolatileVariableBase,\r
- sizeof (TempFlag),\r
- &TempFlag\r
- );\r
- if (!EFI_ERROR (Status)) {\r
- //\r
- // Update the data in NV cache.\r
- //\r
- *VarErrFlag = Flag;\r
- }\r
- }\r
-}\r
-\r
-/**\r
- Initialize variable error flag.\r
-\r
- Before EndOfDxe, the variable indicates the last boot variable error flag,\r
- then it means the last boot variable error flag must be got before EndOfDxe.\r
- After EndOfDxe, the variable indicates the current boot variable error flag,\r
- then it means the current boot variable error flag must be got after EndOfDxe.\r
-\r
-**/\r
-VOID\r
-InitializeVarErrorFlag (\r
- VOID\r
- )\r
-{\r
- EFI_STATUS Status;\r
- VARIABLE_POINTER_TRACK Variable;\r
- VAR_ERROR_FLAG Flag;\r
- VAR_ERROR_FLAG VarErrFlag;\r
-\r
- if (!mEndOfDxe) {\r
- return;\r
- }\r
-\r
- Flag = mCurrentBootVarErrFlag;\r
- DEBUG ((EFI_D_INFO, "Initialize variable error flag (%02x)\n", Flag));\r
-\r
- Status = FindVariable (\r
- VAR_ERROR_FLAG_NAME,\r
- &gEdkiiVarErrorFlagGuid,\r
- &Variable,\r
- &mVariableModuleGlobal->VariableGlobal,\r
- FALSE\r
- );\r
- if (!EFI_ERROR (Status)) {\r
- VarErrFlag = *((VAR_ERROR_FLAG *) GetVariableDataPtr (Variable.CurrPtr));\r
- if (VarErrFlag == Flag) {\r
- return;\r
- }\r
- }\r
-\r
- UpdateVariable (\r
- VAR_ERROR_FLAG_NAME,\r
- &gEdkiiVarErrorFlagGuid,\r
- &Flag,\r
- sizeof (Flag),\r
- VARIABLE_ATTRIBUTE_NV_BS_RT,\r
- 0,\r
- 0,\r
- &Variable,\r
- NULL\r
- );\r
-}\r
-\r
-/**\r
- Is user variable?\r
-\r
- @param[in] Variable Pointer to variable header.\r
-\r
- @retval TRUE User variable.\r
- @retval FALSE System variable.\r
-\r
-**/\r
-BOOLEAN\r
-IsUserVariable (\r
- IN VARIABLE_HEADER *Variable\r
- )\r
-{\r
- VAR_CHECK_VARIABLE_PROPERTY Property;\r
-\r
- //\r
- // Only after End Of Dxe, the variables belong to system variable are fixed.\r
- // If PcdMaxUserNvStorageVariableSize is 0, it means user variable share the same NV storage with system variable,\r
- // then no need to check if the variable is user variable or not specially.\r
- //\r
- if (mEndOfDxe && (mVariableModuleGlobal->CommonMaxUserVariableSpace != mVariableModuleGlobal->CommonVariableSpace)) {\r
- if (InternalVarCheckVariablePropertyGet (GetVariableNamePtr (Variable), &Variable->VendorGuid, &Property) == EFI_NOT_FOUND) {\r
- return TRUE;\r
- }\r
- }\r
- return FALSE;\r
-}\r
-\r
-/**\r
- Calculate common user variable total size.\r
-\r
-**/\r
-VOID\r
-CalculateCommonUserVariableTotalSize (\r
- VOID\r
- )\r
-{\r
- VARIABLE_HEADER *Variable;\r
- VARIABLE_HEADER *NextVariable;\r
- UINTN VariableSize;\r
- VAR_CHECK_VARIABLE_PROPERTY Property;\r
-\r
- //\r
- // Only after End Of Dxe, the variables belong to system variable are fixed.\r
- // If PcdMaxUserNvStorageVariableSize is 0, it means user variable share the same NV storage with system variable,\r
- // then no need to calculate the common user variable total size specially.\r
- //\r
- if (mEndOfDxe && (mVariableModuleGlobal->CommonMaxUserVariableSpace != mVariableModuleGlobal->CommonVariableSpace)) {\r
- Variable = GetStartPointer (mNvVariableCache);\r
- while (IsValidVariableHeader (Variable, GetEndPointer (mNvVariableCache))) {\r
- NextVariable = GetNextVariablePtr (Variable);\r
- VariableSize = (UINTN) NextVariable - (UINTN) Variable;\r
- if ((Variable->Attributes & EFI_VARIABLE_HARDWARE_ERROR_RECORD) != EFI_VARIABLE_HARDWARE_ERROR_RECORD) {\r
- if (InternalVarCheckVariablePropertyGet (GetVariableNamePtr (Variable), &Variable->VendorGuid, &Property) == EFI_NOT_FOUND) {\r
- //\r
- // No property, it is user variable.\r
- //\r
- mVariableModuleGlobal->CommonUserVariableTotalSize += VariableSize;\r
- }\r
- }\r
-\r
- Variable = NextVariable;\r
- }\r
- }\r
-}\r
-\r
-/**\r
- Initialize variable quota.\r
-\r
-**/\r
-VOID\r
-InitializeVariableQuota (\r
- VOID\r
- )\r
-{\r
- STATIC BOOLEAN Initialized;\r
-\r
- if (!mEndOfDxe || Initialized) {\r
- return;\r
- }\r
- Initialized = TRUE;\r
-\r
- InitializeVarErrorFlag ();\r
- CalculateCommonUserVariableTotalSize ();\r
-}\r
-\r
-/**\r
-\r
- Check the PubKeyIndex is a valid key or not.\r
-\r
- This function will iterate the NV storage to see if this PubKeyIndex is still referenced\r
- by any valid count-based auth variabe.\r
-\r
- @param[in] PubKeyIndex Index of the public key in public key store.\r
-\r
- @retval TRUE The PubKeyIndex is still in use.\r
- @retval FALSE The PubKeyIndex is not referenced by any count-based auth variabe.\r
-\r
-**/\r
-BOOLEAN\r
-IsValidPubKeyIndex (\r
- IN UINT32 PubKeyIndex\r
- )\r
-{\r
- VARIABLE_HEADER *Variable;\r
- VARIABLE_HEADER *VariableStoreEnd;\r
-\r
- if (PubKeyIndex > mPubKeyNumber) {\r
- return FALSE;\r
- }\r
-\r
- Variable = GetStartPointer ((VARIABLE_STORE_HEADER *) (UINTN) mVariableModuleGlobal->VariableGlobal.NonVolatileVariableBase);\r
- VariableStoreEnd = GetEndPointer ((VARIABLE_STORE_HEADER *) (UINTN) mVariableModuleGlobal->VariableGlobal.NonVolatileVariableBase);\r
-\r
- while (IsValidVariableHeader (Variable, VariableStoreEnd)) {\r
- if ((Variable->State == VAR_ADDED || Variable->State == (VAR_IN_DELETED_TRANSITION & VAR_ADDED)) &&\r
- Variable->PubKeyIndex == PubKeyIndex) {\r
- return TRUE;\r
- }\r
- Variable = GetNextVariablePtr (Variable);\r
- }\r
-\r
- return FALSE;\r
-}\r
-\r
-/**\r
-\r
- Get the number of valid public key in PubKeyStore.\r
-\r
- @param[in] PubKeyNumber Number of the public key in public key store.\r
-\r
- @return Number of valid public key in PubKeyStore.\r
-\r
-**/\r
-UINT32\r
-GetValidPubKeyNumber (\r
- IN UINT32 PubKeyNumber\r
- )\r
-{\r
- UINT32 PubKeyIndex;\r
- UINT32 Counter;\r
-\r
- Counter = 0;\r
-\r
- for (PubKeyIndex = 1; PubKeyIndex <= PubKeyNumber; PubKeyIndex++) {\r
- if (IsValidPubKeyIndex (PubKeyIndex)) {\r
- Counter++;\r
- }\r
- }\r
-\r
- return Counter;\r
-}\r
-\r
-/**\r
-\r
- Filter the useless key in public key store.\r
-\r
- This function will find out all valid public keys in public key database, save them in new allocated\r
- buffer NewPubKeyStore, and give the new PubKeyIndex. The caller is responsible for freeing buffer\r
- NewPubKeyIndex and NewPubKeyStore with FreePool().\r
-\r
- @param[in] PubKeyStore Point to the public key database.\r
- @param[in] PubKeyNumber Number of the public key in PubKeyStore.\r
- @param[out] NewPubKeyIndex Point to an array of new PubKeyIndex corresponds to NewPubKeyStore.\r
- @param[out] NewPubKeyStore Saved all valid public keys in PubKeyStore.\r
- @param[out] NewPubKeySize Buffer size of the NewPubKeyStore.\r
-\r
- @retval EFI_SUCCESS Trim operation is complete successfully.\r
- @retval EFI_OUT_OF_RESOURCES No enough memory resources, or no useless key in PubKeyStore.\r
-\r
-**/\r
-EFI_STATUS\r
-PubKeyStoreFilter (\r
- IN UINT8 *PubKeyStore,\r
- IN UINT32 PubKeyNumber,\r
- OUT UINT32 **NewPubKeyIndex,\r
- OUT UINT8 **NewPubKeyStore,\r
- OUT UINT32 *NewPubKeySize\r
- )\r
-{\r
- UINT32 PubKeyIndex;\r
- UINT32 CopiedKey;\r
- UINT32 NewPubKeyNumber;\r
-\r
- NewPubKeyNumber = GetValidPubKeyNumber (PubKeyNumber);\r
- if (NewPubKeyNumber == PubKeyNumber) {\r
- return EFI_OUT_OF_RESOURCES;\r
- }\r
-\r
- if (NewPubKeyNumber != 0) {\r
- *NewPubKeySize = NewPubKeyNumber * EFI_CERT_TYPE_RSA2048_SIZE;\r
- } else {\r
- *NewPubKeySize = sizeof (UINT8);\r
- }\r
-\r
- *NewPubKeyStore = AllocatePool (*NewPubKeySize);\r
- if (*NewPubKeyStore == NULL) {\r
- return EFI_OUT_OF_RESOURCES;\r
- }\r
-\r
- *NewPubKeyIndex = AllocateZeroPool ((PubKeyNumber + 1) * sizeof (UINT32));\r
- if (*NewPubKeyIndex == NULL) {\r
- FreePool (*NewPubKeyStore);\r
- *NewPubKeyStore = NULL;\r
- return EFI_OUT_OF_RESOURCES;\r
- }\r
-\r
- CopiedKey = 0;\r
- for (PubKeyIndex = 1; PubKeyIndex <= PubKeyNumber; PubKeyIndex++) {\r
- if (IsValidPubKeyIndex (PubKeyIndex)) {\r
- CopyMem (\r
- *NewPubKeyStore + CopiedKey * EFI_CERT_TYPE_RSA2048_SIZE,\r
- PubKeyStore + (PubKeyIndex - 1) * EFI_CERT_TYPE_RSA2048_SIZE,\r
- EFI_CERT_TYPE_RSA2048_SIZE\r
- );\r
- (*NewPubKeyIndex)[PubKeyIndex] = ++CopiedKey;\r
- }\r
- }\r
- return EFI_SUCCESS;\r
-}\r
-\r
-/**\r
-\r
- Variable store garbage collection and reclaim operation.\r
-\r
- If ReclaimPubKeyStore is FALSE, reclaim variable space by deleting the obsoleted varaibles.\r
- If ReclaimPubKeyStore is TRUE, reclaim invalid key in public key database and update the PubKeyIndex\r
- for all the count-based authenticate variable in NV storage.\r
-\r
- @param[in] VariableBase Base address of variable store.\r
- @param[out] LastVariableOffset Offset of last variable.\r
- @param[in] IsVolatile The variable store is volatile or not;\r
- if it is non-volatile, need FTW.\r
- @param[in, out] UpdatingPtrTrack Pointer to updating variable pointer track structure.\r
- @param[in] NewVariable Pointer to new variable.\r
- @param[in] NewVariableSize New variable size.\r
- @param[in] ReclaimPubKeyStore Reclaim for public key database or not.\r
-\r
- @return EFI_SUCCESS Reclaim operation has finished successfully.\r
- @return EFI_OUT_OF_RESOURCES No enough memory resources or variable space.\r
- @return EFI_DEVICE_ERROR The public key database doesn't exist.\r
- @return Others Unexpect error happened during reclaim operation.\r
-\r
-**/\r
-EFI_STATUS\r
-Reclaim (\r
- IN EFI_PHYSICAL_ADDRESS VariableBase,\r
- OUT UINTN *LastVariableOffset,\r
- IN BOOLEAN IsVolatile,\r
- IN OUT VARIABLE_POINTER_TRACK *UpdatingPtrTrack,\r
- IN VARIABLE_HEADER *NewVariable,\r
- IN UINTN NewVariableSize,\r
- IN BOOLEAN ReclaimPubKeyStore\r
- )\r
-{\r
- VARIABLE_HEADER *Variable;\r
- VARIABLE_HEADER *AddedVariable;\r
- VARIABLE_HEADER *NextVariable;\r
- VARIABLE_HEADER *NextAddedVariable;\r
- VARIABLE_STORE_HEADER *VariableStoreHeader;\r
- UINT8 *ValidBuffer;\r
- UINTN MaximumBufferSize;\r
- UINTN VariableSize;\r
- UINTN NameSize;\r
- UINT8 *CurrPtr;\r
- VOID *Point0;\r
- VOID *Point1;\r
- BOOLEAN FoundAdded;\r
- EFI_STATUS Status;\r
- UINTN CommonVariableTotalSize;\r
- UINTN CommonUserVariableTotalSize;\r
- UINTN HwErrVariableTotalSize;\r
- UINT32 *NewPubKeyIndex;\r
- UINT8 *NewPubKeyStore;\r
- UINT32 NewPubKeySize;\r
- VARIABLE_HEADER *PubKeyHeader;\r
- VARIABLE_HEADER *UpdatingVariable;\r
- VARIABLE_HEADER *UpdatingInDeletedTransition;\r
-\r
- UpdatingVariable = NULL;\r
- UpdatingInDeletedTransition = NULL;\r
- if (UpdatingPtrTrack != NULL) {\r
- UpdatingVariable = UpdatingPtrTrack->CurrPtr;\r
- UpdatingInDeletedTransition = UpdatingPtrTrack->InDeletedTransitionPtr;\r
- }\r
-\r
- VariableStoreHeader = (VARIABLE_STORE_HEADER *) ((UINTN) VariableBase);\r
-\r
- CommonVariableTotalSize = 0;\r
- CommonUserVariableTotalSize = 0;\r
- HwErrVariableTotalSize = 0;\r
- NewPubKeyIndex = NULL;\r
- NewPubKeyStore = NULL;\r
- NewPubKeySize = 0;\r
- PubKeyHeader = NULL;\r
-\r
- if (IsVolatile) {\r
- //\r
- // Start Pointers for the variable.\r
- //\r
- Variable = GetStartPointer (VariableStoreHeader);\r
- MaximumBufferSize = sizeof (VARIABLE_STORE_HEADER);\r
-\r
- while (IsValidVariableHeader (Variable, GetEndPointer (VariableStoreHeader))) {\r
- NextVariable = GetNextVariablePtr (Variable);\r
- if ((Variable->State == VAR_ADDED || Variable->State == (VAR_IN_DELETED_TRANSITION & VAR_ADDED)) &&\r
- Variable != UpdatingVariable &&\r
- Variable != UpdatingInDeletedTransition\r
- ) {\r
- VariableSize = (UINTN) NextVariable - (UINTN) Variable;\r
- MaximumBufferSize += VariableSize;\r
- }\r
-\r
- Variable = NextVariable;\r
- }\r
-\r
- if (NewVariable != NULL) {\r
- //\r
- // Add the new variable size.\r
- //\r
- MaximumBufferSize += NewVariableSize;\r
- }\r
-\r
- //\r
- // Reserve the 1 Bytes with Oxff to identify the\r
- // end of the variable buffer.\r
- //\r
- MaximumBufferSize += 1;\r
- ValidBuffer = AllocatePool (MaximumBufferSize);\r
- if (ValidBuffer == NULL) {\r
- return EFI_OUT_OF_RESOURCES;\r
- }\r
- } else {\r
- //\r
- // For NV variable reclaim, don't allocate pool here and just use mNvVariableCache\r
- // as the buffer to reduce SMRAM consumption for SMM variable driver.\r
- //\r
- MaximumBufferSize = mNvVariableCache->Size;\r
- ValidBuffer = (UINT8 *) mNvVariableCache;\r
- }\r
-\r
- SetMem (ValidBuffer, MaximumBufferSize, 0xff);\r
-\r
- //\r
- // Copy variable store header.\r
- //\r
- CopyMem (ValidBuffer, VariableStoreHeader, sizeof (VARIABLE_STORE_HEADER));\r
- CurrPtr = (UINT8 *) GetStartPointer ((VARIABLE_STORE_HEADER *) ValidBuffer);\r
-\r
- if (ReclaimPubKeyStore) {\r
- ASSERT (IsVolatile == FALSE);\r
- //\r
- // Trim the PubKeyStore and get new PubKeyIndex.\r
- //\r
- Status = PubKeyStoreFilter (\r
- mPubKeyStore,\r
- mPubKeyNumber,\r
- &NewPubKeyIndex,\r
- &NewPubKeyStore,\r
- &NewPubKeySize\r
- );\r
- if (EFI_ERROR (Status)) {\r
- goto Done;\r
- }\r
- ASSERT ((NewPubKeyIndex != NULL) && (NewPubKeyStore != NULL));\r
-\r
- //\r
- // Refresh the PubKeyIndex for all valid variables (ADDED and IN_DELETED_TRANSITION).\r
- //\r
- Variable = GetStartPointer (VariableStoreHeader);\r
- while (IsValidVariableHeader (Variable, GetEndPointer (VariableStoreHeader))) {\r
- NextVariable = GetNextVariablePtr (Variable);\r
- if (Variable->State == VAR_ADDED || Variable->State == (VAR_IN_DELETED_TRANSITION & VAR_ADDED)) {\r
- if ((StrCmp (GetVariableNamePtr (Variable), AUTHVAR_KEYDB_NAME) == 0) &&\r
- (CompareGuid (&Variable->VendorGuid, &gEfiAuthenticatedVariableGuid))) {\r
- //\r
- // Skip the public key database, it will be reinstalled later.\r
- //\r
- PubKeyHeader = Variable;\r
- Variable = NextVariable;\r
- continue;\r
- }\r
-\r
- VariableSize = (UINTN) NextVariable - (UINTN) Variable;\r
- CopyMem (CurrPtr, (UINT8 *) Variable, VariableSize);\r
- ((VARIABLE_HEADER*) CurrPtr)->PubKeyIndex = NewPubKeyIndex[Variable->PubKeyIndex];\r
- CurrPtr += VariableSize;\r
- if ((Variable->Attributes & EFI_VARIABLE_HARDWARE_ERROR_RECORD) == EFI_VARIABLE_HARDWARE_ERROR_RECORD) {\r
- HwErrVariableTotalSize += VariableSize;\r
- } else if ((Variable->Attributes & EFI_VARIABLE_HARDWARE_ERROR_RECORD) != EFI_VARIABLE_HARDWARE_ERROR_RECORD) {\r
- CommonVariableTotalSize += VariableSize;\r
- if (IsUserVariable (Variable)) {\r
- CommonUserVariableTotalSize += VariableSize;\r
- }\r
- }\r
- }\r
- Variable = NextVariable;\r
- }\r
-\r
- //\r
- // Reinstall the new public key database.\r
- //\r
- ASSERT (PubKeyHeader != NULL);\r
- if (PubKeyHeader == NULL) {\r
- Status = EFI_DEVICE_ERROR;\r
- goto Done;\r
- }\r
- CopyMem (CurrPtr, (UINT8*) PubKeyHeader, sizeof (VARIABLE_HEADER));\r
- Variable = (VARIABLE_HEADER*) CurrPtr;\r
- Variable->DataSize = NewPubKeySize;\r
- StrCpy (GetVariableNamePtr (Variable), GetVariableNamePtr (PubKeyHeader));\r
- CopyMem (GetVariableDataPtr (Variable), NewPubKeyStore, NewPubKeySize);\r
- CurrPtr = (UINT8*) GetNextVariablePtr (Variable);\r
- CommonVariableTotalSize += (UINTN) CurrPtr - (UINTN) Variable;\r
- if (IsUserVariable (Variable)) {\r
- CommonUserVariableTotalSize += (UINTN) CurrPtr - (UINTN) Variable;\r
- }\r
- } else {\r
- //\r
- // Reinstall all ADDED variables as long as they are not identical to Updating Variable.\r
- //\r
- Variable = GetStartPointer (VariableStoreHeader);\r
- while (IsValidVariableHeader (Variable, GetEndPointer (VariableStoreHeader))) {\r
- NextVariable = GetNextVariablePtr (Variable);\r
- if (Variable != UpdatingVariable && Variable->State == VAR_ADDED) {\r
- VariableSize = (UINTN) NextVariable - (UINTN) Variable;\r
- CopyMem (CurrPtr, (UINT8 *) Variable, VariableSize);\r
- CurrPtr += VariableSize;\r
- if ((!IsVolatile) && ((Variable->Attributes & EFI_VARIABLE_HARDWARE_ERROR_RECORD) == EFI_VARIABLE_HARDWARE_ERROR_RECORD)) {\r
- HwErrVariableTotalSize += VariableSize;\r
- } else if ((!IsVolatile) && ((Variable->Attributes & EFI_VARIABLE_HARDWARE_ERROR_RECORD) != EFI_VARIABLE_HARDWARE_ERROR_RECORD)) {\r
- CommonVariableTotalSize += VariableSize;\r
- if (IsUserVariable (Variable)) {\r
- CommonUserVariableTotalSize += VariableSize;\r
- }\r
- }\r
- }\r
- Variable = NextVariable;\r
- }\r
-\r
- //\r
- // Reinstall all in delete transition variables.\r
- //\r
- Variable = GetStartPointer (VariableStoreHeader);\r
- while (IsValidVariableHeader (Variable, GetEndPointer (VariableStoreHeader))) {\r
- NextVariable = GetNextVariablePtr (Variable);\r
- if (Variable != UpdatingVariable && Variable != UpdatingInDeletedTransition && Variable->State == (VAR_IN_DELETED_TRANSITION & VAR_ADDED)) {\r
-\r
- //\r
- // Buffer has cached all ADDED variable.\r
- // Per IN_DELETED variable, we have to guarantee that\r
- // no ADDED one in previous buffer.\r
- //\r
-\r
- FoundAdded = FALSE;\r
- AddedVariable = GetStartPointer ((VARIABLE_STORE_HEADER *) ValidBuffer);\r
- while (IsValidVariableHeader (AddedVariable, GetEndPointer ((VARIABLE_STORE_HEADER *) ValidBuffer))) {\r
- NextAddedVariable = GetNextVariablePtr (AddedVariable);\r
- NameSize = NameSizeOfVariable (AddedVariable);\r
- if (CompareGuid (&AddedVariable->VendorGuid, &Variable->VendorGuid) &&\r
- NameSize == NameSizeOfVariable (Variable)\r
- ) {\r
- Point0 = (VOID *) GetVariableNamePtr (AddedVariable);\r
- Point1 = (VOID *) GetVariableNamePtr (Variable);\r
- if (CompareMem (Point0, Point1, NameSize) == 0) {\r
- FoundAdded = TRUE;\r
- break;\r
- }\r
- }\r
- AddedVariable = NextAddedVariable;\r
- }\r
- if (!FoundAdded) {\r
- //\r
- // Promote VAR_IN_DELETED_TRANSITION to VAR_ADDED.\r
- //\r
- VariableSize = (UINTN) NextVariable - (UINTN) Variable;\r
- CopyMem (CurrPtr, (UINT8 *) Variable, VariableSize);\r
- ((VARIABLE_HEADER *) CurrPtr)->State = VAR_ADDED;\r
- CurrPtr += VariableSize;\r
- if ((!IsVolatile) && ((Variable->Attributes & EFI_VARIABLE_HARDWARE_ERROR_RECORD) == EFI_VARIABLE_HARDWARE_ERROR_RECORD)) {\r
- HwErrVariableTotalSize += VariableSize;\r
- } else if ((!IsVolatile) && ((Variable->Attributes & EFI_VARIABLE_HARDWARE_ERROR_RECORD) != EFI_VARIABLE_HARDWARE_ERROR_RECORD)) {\r
- CommonVariableTotalSize += VariableSize;\r
- if (IsUserVariable (Variable)) {\r
- CommonUserVariableTotalSize += VariableSize;\r
- }\r
- }\r
- }\r
- }\r
-\r
- Variable = NextVariable;\r
- }\r
-\r
- //\r
- // Install the new variable if it is not NULL.\r
- //\r
- if (NewVariable != NULL) {\r
- if ((UINTN) (CurrPtr - ValidBuffer) + NewVariableSize > VariableStoreHeader->Size) {\r
- //\r
- // No enough space to store the new variable.\r
- //\r
- Status = EFI_OUT_OF_RESOURCES;\r
- goto Done;\r
- }\r
- if (!IsVolatile) {\r
- if ((NewVariable->Attributes & EFI_VARIABLE_HARDWARE_ERROR_RECORD) == EFI_VARIABLE_HARDWARE_ERROR_RECORD) {\r
- HwErrVariableTotalSize += NewVariableSize;\r
- } else if ((NewVariable->Attributes & EFI_VARIABLE_HARDWARE_ERROR_RECORD) != EFI_VARIABLE_HARDWARE_ERROR_RECORD) {\r
- CommonVariableTotalSize += NewVariableSize;\r
- if (IsUserVariable (NewVariable)) {\r
- CommonUserVariableTotalSize += NewVariableSize;\r
- }\r
- }\r
- if ((HwErrVariableTotalSize > PcdGet32 (PcdHwErrStorageSize)) ||\r
- (CommonVariableTotalSize > mVariableModuleGlobal->CommonVariableSpace) ||\r
- (CommonUserVariableTotalSize > mVariableModuleGlobal->CommonMaxUserVariableSpace)) {\r
- //\r
- // No enough space to store the new variable by NV or NV+HR attribute.\r
- //\r
- Status = EFI_OUT_OF_RESOURCES;\r
- goto Done;\r
- }\r
- }\r
-\r
- CopyMem (CurrPtr, (UINT8 *) NewVariable, NewVariableSize);\r
- ((VARIABLE_HEADER *) CurrPtr)->State = VAR_ADDED;\r
- if (UpdatingVariable != NULL) {\r
- UpdatingPtrTrack->CurrPtr = (VARIABLE_HEADER *)((UINTN)UpdatingPtrTrack->StartPtr + ((UINTN)CurrPtr - (UINTN)GetStartPointer ((VARIABLE_STORE_HEADER *) ValidBuffer)));\r
- UpdatingPtrTrack->InDeletedTransitionPtr = NULL;\r
- }\r
- CurrPtr += NewVariableSize;\r
- }\r
- }\r
-\r
- if (IsVolatile) {\r
- //\r
- // If volatile variable store, just copy valid buffer.\r
- //\r
- SetMem ((UINT8 *) (UINTN) VariableBase, VariableStoreHeader->Size, 0xff);\r
- CopyMem ((UINT8 *) (UINTN) VariableBase, ValidBuffer, (UINTN) (CurrPtr - ValidBuffer));\r
- *LastVariableOffset = (UINTN) (CurrPtr - ValidBuffer);\r
- Status = EFI_SUCCESS;\r
- } else {\r
- //\r
- // If non-volatile variable store, perform FTW here.\r
- //\r
- Status = FtwVariableSpace (\r
- VariableBase,\r
- (VARIABLE_STORE_HEADER *) ValidBuffer\r
- );\r
- if (!EFI_ERROR (Status)) {\r
- *LastVariableOffset = (UINTN) (CurrPtr - ValidBuffer);\r
- mVariableModuleGlobal->HwErrVariableTotalSize = HwErrVariableTotalSize;\r
- mVariableModuleGlobal->CommonVariableTotalSize = CommonVariableTotalSize;\r
- mVariableModuleGlobal->CommonUserVariableTotalSize = CommonUserVariableTotalSize;\r
- } else {\r
- Variable = GetStartPointer ((VARIABLE_STORE_HEADER *)(UINTN)VariableBase);\r
- while (IsValidVariableHeader (Variable, GetEndPointer ((VARIABLE_STORE_HEADER *)(UINTN)VariableBase))) {\r
- NextVariable = GetNextVariablePtr (Variable);\r
- VariableSize = (UINTN) NextVariable - (UINTN) Variable;\r
- if ((Variable->Attributes & EFI_VARIABLE_HARDWARE_ERROR_RECORD) == EFI_VARIABLE_HARDWARE_ERROR_RECORD) {\r
- mVariableModuleGlobal->HwErrVariableTotalSize += VariableSize;\r
- } else if ((Variable->Attributes & EFI_VARIABLE_HARDWARE_ERROR_RECORD) != EFI_VARIABLE_HARDWARE_ERROR_RECORD) {\r
- mVariableModuleGlobal->CommonVariableTotalSize += VariableSize;\r
- if (IsUserVariable (Variable)) {\r
- mVariableModuleGlobal->CommonUserVariableTotalSize += VariableSize;\r
- }\r
- }\r
-\r
- Variable = NextVariable;\r
- }\r
- *LastVariableOffset = (UINTN) Variable - (UINTN) VariableBase;\r
- }\r
- }\r
-\r
-Done:\r
- if (IsVolatile) {\r
- FreePool (ValidBuffer);\r
- } else {\r
- //\r
- // For NV variable reclaim, we use mNvVariableCache as the buffer, so copy the data back.\r
- //\r
- CopyMem (mNvVariableCache, (UINT8 *)(UINTN)VariableBase, VariableStoreHeader->Size);\r
-\r
- if (NewPubKeyStore != NULL) {\r
- FreePool (NewPubKeyStore);\r
- }\r
-\r
- if (NewPubKeyIndex != NULL) {\r
- FreePool (NewPubKeyIndex);\r
- }\r
- }\r
-\r
- return Status;\r
-}\r
-\r
-/**\r
- Find the variable in the specified variable store.\r
-\r
- @param[in] VariableName Name of the variable to be found\r
- @param[in] VendorGuid Vendor GUID to be found.\r
- @param[in] IgnoreRtCheck Ignore EFI_VARIABLE_RUNTIME_ACCESS attribute\r
- check at runtime when searching variable.\r
- @param[in, out] PtrTrack Variable Track Pointer structure that contains Variable Information.\r
-\r
- @retval EFI_SUCCESS Variable found successfully\r
- @retval EFI_NOT_FOUND Variable not found\r
-**/\r
-EFI_STATUS\r
-FindVariableEx (\r
- IN CHAR16 *VariableName,\r
- IN EFI_GUID *VendorGuid,\r
- IN BOOLEAN IgnoreRtCheck,\r
- IN OUT VARIABLE_POINTER_TRACK *PtrTrack\r
- )\r
-{\r
- VARIABLE_HEADER *InDeletedVariable;\r
- VOID *Point;\r
-\r
- PtrTrack->InDeletedTransitionPtr = NULL;\r
-\r
- //\r
- // Find the variable by walk through HOB, volatile and non-volatile variable store.\r
- //\r
- InDeletedVariable = NULL;\r
-\r
- for ( PtrTrack->CurrPtr = PtrTrack->StartPtr\r
- ; IsValidVariableHeader (PtrTrack->CurrPtr, PtrTrack->EndPtr)\r
- ; PtrTrack->CurrPtr = GetNextVariablePtr (PtrTrack->CurrPtr)\r
- ) {\r
- if (PtrTrack->CurrPtr->State == VAR_ADDED ||\r
- PtrTrack->CurrPtr->State == (VAR_IN_DELETED_TRANSITION & VAR_ADDED)\r
- ) {\r
- if (IgnoreRtCheck || !AtRuntime () || ((PtrTrack->CurrPtr->Attributes & EFI_VARIABLE_RUNTIME_ACCESS) != 0)) {\r
- if (VariableName[0] == 0) {\r
- if (PtrTrack->CurrPtr->State == (VAR_IN_DELETED_TRANSITION & VAR_ADDED)) {\r
- InDeletedVariable = PtrTrack->CurrPtr;\r
- } else {\r
- PtrTrack->InDeletedTransitionPtr = InDeletedVariable;\r
- return EFI_SUCCESS;\r
- }\r
- } else {\r
- if (CompareGuid (VendorGuid, &PtrTrack->CurrPtr->VendorGuid)) {\r
- Point = (VOID *) GetVariableNamePtr (PtrTrack->CurrPtr);\r
-\r
- ASSERT (NameSizeOfVariable (PtrTrack->CurrPtr) != 0);\r
- if (CompareMem (VariableName, Point, NameSizeOfVariable (PtrTrack->CurrPtr)) == 0) {\r
- if (PtrTrack->CurrPtr->State == (VAR_IN_DELETED_TRANSITION & VAR_ADDED)) {\r
- InDeletedVariable = PtrTrack->CurrPtr;\r
- } else {\r
- PtrTrack->InDeletedTransitionPtr = InDeletedVariable;\r
- return EFI_SUCCESS;\r
- }\r
- }\r
- }\r
- }\r
- }\r
- }\r
- }\r
-\r
- PtrTrack->CurrPtr = InDeletedVariable;\r
- return (PtrTrack->CurrPtr == NULL) ? EFI_NOT_FOUND : EFI_SUCCESS;\r
-}\r
-\r
-\r
-/**\r
- Finds variable in storage blocks of volatile and non-volatile storage areas.\r
-\r
- This code finds variable in storage blocks of volatile and non-volatile storage areas.\r
- If VariableName is an empty string, then we just return the first\r
- qualified variable without comparing VariableName and VendorGuid.\r
- If IgnoreRtCheck is TRUE, then we ignore the EFI_VARIABLE_RUNTIME_ACCESS attribute check\r
- at runtime when searching existing variable, only VariableName and VendorGuid are compared.\r
- Otherwise, variables without EFI_VARIABLE_RUNTIME_ACCESS are not visible at runtime.\r
-\r
- @param[in] VariableName Name of the variable to be found.\r
- @param[in] VendorGuid Vendor GUID to be found.\r
- @param[out] PtrTrack VARIABLE_POINTER_TRACK structure for output,\r
- including the range searched and the target position.\r
- @param[in] Global Pointer to VARIABLE_GLOBAL structure, including\r
- base of volatile variable storage area, base of\r
- NV variable storage area, and a lock.\r
- @param[in] IgnoreRtCheck Ignore EFI_VARIABLE_RUNTIME_ACCESS attribute\r
- check at runtime when searching variable.\r
-\r
- @retval EFI_INVALID_PARAMETER If VariableName is not an empty string, while\r
- VendorGuid is NULL.\r
- @retval EFI_SUCCESS Variable successfully found.\r
- @retval EFI_NOT_FOUND Variable not found\r
-\r
-**/\r
-EFI_STATUS\r
-FindVariable (\r
- IN CHAR16 *VariableName,\r
- IN EFI_GUID *VendorGuid,\r
- OUT VARIABLE_POINTER_TRACK *PtrTrack,\r
- IN VARIABLE_GLOBAL *Global,\r
- IN BOOLEAN IgnoreRtCheck\r
- )\r
-{\r
- EFI_STATUS Status;\r
- VARIABLE_STORE_HEADER *VariableStoreHeader[VariableStoreTypeMax];\r
- VARIABLE_STORE_TYPE Type;\r
-\r
- if (VariableName[0] != 0 && VendorGuid == NULL) {\r
- return EFI_INVALID_PARAMETER;\r
- }\r
-\r
- //\r
- // 0: Volatile, 1: HOB, 2: Non-Volatile.\r
- // The index and attributes mapping must be kept in this order as RuntimeServiceGetNextVariableName\r
- // make use of this mapping to implement search algorithm.\r
- //\r
- VariableStoreHeader[VariableStoreTypeVolatile] = (VARIABLE_STORE_HEADER *) (UINTN) Global->VolatileVariableBase;\r
- VariableStoreHeader[VariableStoreTypeHob] = (VARIABLE_STORE_HEADER *) (UINTN) Global->HobVariableBase;\r
- VariableStoreHeader[VariableStoreTypeNv] = mNvVariableCache;\r
-\r
- //\r
- // Find the variable by walk through HOB, volatile and non-volatile variable store.\r
- //\r
- for (Type = (VARIABLE_STORE_TYPE) 0; Type < VariableStoreTypeMax; Type++) {\r
- if (VariableStoreHeader[Type] == NULL) {\r
- continue;\r
- }\r
-\r
- PtrTrack->StartPtr = GetStartPointer (VariableStoreHeader[Type]);\r
- PtrTrack->EndPtr = GetEndPointer (VariableStoreHeader[Type]);\r
- PtrTrack->Volatile = (BOOLEAN) (Type == VariableStoreTypeVolatile);\r
-\r
- Status = FindVariableEx (VariableName, VendorGuid, IgnoreRtCheck, PtrTrack);\r
- if (!EFI_ERROR (Status)) {\r
- return Status;\r
- }\r
- }\r
- return EFI_NOT_FOUND;\r
-}\r
-\r
-/**\r
- Get index from supported language codes according to language string.\r
-\r
- This code is used to get corresponding index in supported language codes. It can handle\r
- RFC4646 and ISO639 language tags.\r
- In ISO639 language tags, take 3-characters as a delimitation to find matched string and calculate the index.\r
- In RFC4646 language tags, take semicolon as a delimitation to find matched string and calculate the index.\r
-\r
- For example:\r
- SupportedLang = "engfraengfra"\r
- Lang = "eng"\r
- Iso639Language = TRUE\r
- The return value is "0".\r
- Another example:\r
- SupportedLang = "en;fr;en-US;fr-FR"\r
- Lang = "fr-FR"\r
- Iso639Language = FALSE\r
- The return value is "3".\r
-\r
- @param SupportedLang Platform supported language codes.\r
- @param Lang Configured language.\r
- @param Iso639Language A bool value to signify if the handler is operated on ISO639 or RFC4646.\r
-\r
- @retval The index of language in the language codes.\r
-\r
-**/\r
-UINTN\r
-GetIndexFromSupportedLangCodes(\r
- IN CHAR8 *SupportedLang,\r
- IN CHAR8 *Lang,\r
- IN BOOLEAN Iso639Language\r
- )\r
-{\r
- UINTN Index;\r
- UINTN CompareLength;\r
- UINTN LanguageLength;\r
-\r
- if (Iso639Language) {\r
- CompareLength = ISO_639_2_ENTRY_SIZE;\r
- for (Index = 0; Index < AsciiStrLen (SupportedLang); Index += CompareLength) {\r
- if (AsciiStrnCmp (Lang, SupportedLang + Index, CompareLength) == 0) {\r
- //\r
- // Successfully find the index of Lang string in SupportedLang string.\r
- //\r
- Index = Index / CompareLength;\r
- return Index;\r
- }\r
- }\r
- ASSERT (FALSE);\r
- return 0;\r
- } else {\r
- //\r
- // Compare RFC4646 language code\r
- //\r
- Index = 0;\r
- for (LanguageLength = 0; Lang[LanguageLength] != '\0'; LanguageLength++);\r
-\r
- for (Index = 0; *SupportedLang != '\0'; Index++, SupportedLang += CompareLength) {\r
- //\r
- // Skip ';' characters in SupportedLang\r
- //\r
- for (; *SupportedLang != '\0' && *SupportedLang == ';'; SupportedLang++);\r
- //\r
- // Determine the length of the next language code in SupportedLang\r
- //\r
- for (CompareLength = 0; SupportedLang[CompareLength] != '\0' && SupportedLang[CompareLength] != ';'; CompareLength++);\r
-\r
- if ((CompareLength == LanguageLength) &&\r
- (AsciiStrnCmp (Lang, SupportedLang, CompareLength) == 0)) {\r
- //\r
- // Successfully find the index of Lang string in SupportedLang string.\r
- //\r
- return Index;\r
- }\r
- }\r
- ASSERT (FALSE);\r
- return 0;\r
- }\r
-}\r
-\r
-/**\r
- Get language string from supported language codes according to index.\r
-\r
- This code is used to get corresponding language strings in supported language codes. It can handle\r
- RFC4646 and ISO639 language tags.\r
- In ISO639 language tags, take 3-characters as a delimitation. Find language string according to the index.\r
- In RFC4646 language tags, take semicolon as a delimitation. Find language string according to the index.\r
-\r
- For example:\r
- SupportedLang = "engfraengfra"\r
- Index = "1"\r
- Iso639Language = TRUE\r
- The return value is "fra".\r
- Another example:\r
- SupportedLang = "en;fr;en-US;fr-FR"\r
- Index = "1"\r
- Iso639Language = FALSE\r
- The return value is "fr".\r
-\r
- @param SupportedLang Platform supported language codes.\r
- @param Index The index in supported language codes.\r
- @param Iso639Language A bool value to signify if the handler is operated on ISO639 or RFC4646.\r
-\r
- @retval The language string in the language codes.\r
-\r
-**/\r
-CHAR8 *\r
-GetLangFromSupportedLangCodes (\r
- IN CHAR8 *SupportedLang,\r
- IN UINTN Index,\r
- IN BOOLEAN Iso639Language\r
-)\r
-{\r
- UINTN SubIndex;\r
- UINTN CompareLength;\r
- CHAR8 *Supported;\r
-\r
- SubIndex = 0;\r
- Supported = SupportedLang;\r
- if (Iso639Language) {\r
- //\r
- // According to the index of Lang string in SupportedLang string to get the language.\r
- // This code will be invoked in RUNTIME, therefore there is not a memory allocate/free operation.\r
- // In driver entry, it pre-allocates a runtime attribute memory to accommodate this string.\r
- //\r
- CompareLength = ISO_639_2_ENTRY_SIZE;\r
- mVariableModuleGlobal->Lang[CompareLength] = '\0';\r
- return CopyMem (mVariableModuleGlobal->Lang, SupportedLang + Index * CompareLength, CompareLength);\r
-\r
- } else {\r
- while (TRUE) {\r
- //\r
- // Take semicolon as delimitation, sequentially traverse supported language codes.\r
- //\r
- for (CompareLength = 0; *Supported != ';' && *Supported != '\0'; CompareLength++) {\r
- Supported++;\r
- }\r
- if ((*Supported == '\0') && (SubIndex != Index)) {\r
- //\r
- // Have completed the traverse, but not find corrsponding string.\r
- // This case is not allowed to happen.\r
- //\r
- ASSERT(FALSE);\r
- return NULL;\r
- }\r
- if (SubIndex == Index) {\r
- //\r
- // According to the index of Lang string in SupportedLang string to get the language.\r
- // As this code will be invoked in RUNTIME, therefore there is not memory allocate/free operation.\r
- // In driver entry, it pre-allocates a runtime attribute memory to accommodate this string.\r
- //\r
- mVariableModuleGlobal->PlatformLang[CompareLength] = '\0';\r
- return CopyMem (mVariableModuleGlobal->PlatformLang, Supported - CompareLength, CompareLength);\r
- }\r
- SubIndex++;\r
-\r
- //\r
- // Skip ';' characters in Supported\r
- //\r
- for (; *Supported != '\0' && *Supported == ';'; Supported++);\r
- }\r
- }\r
-}\r
-\r
-/**\r
- Returns a pointer to an allocated buffer that contains the best matching language\r
- from a set of supported languages.\r
-\r
- This function supports both ISO 639-2 and RFC 4646 language codes, but language\r
- code types may not be mixed in a single call to this function. This function\r
- supports a variable argument list that allows the caller to pass in a prioritized\r
- list of language codes to test against all the language codes in SupportedLanguages.\r
-\r
- If SupportedLanguages is NULL, then ASSERT().\r
-\r
- @param[in] SupportedLanguages A pointer to a Null-terminated ASCII string that\r
- contains a set of language codes in the format\r
- specified by Iso639Language.\r
- @param[in] Iso639Language If TRUE, then all language codes are assumed to be\r
- in ISO 639-2 format. If FALSE, then all language\r
- codes are assumed to be in RFC 4646 language format\r
- @param[in] ... A variable argument list that contains pointers to\r
- Null-terminated ASCII strings that contain one or more\r
- language codes in the format specified by Iso639Language.\r
- The first language code from each of these language\r
- code lists is used to determine if it is an exact or\r
- close match to any of the language codes in\r
- SupportedLanguages. Close matches only apply to RFC 4646\r
- language codes, and the matching algorithm from RFC 4647\r
- is used to determine if a close match is present. If\r
- an exact or close match is found, then the matching\r
- language code from SupportedLanguages is returned. If\r
- no matches are found, then the next variable argument\r
- parameter is evaluated. The variable argument list\r
- is terminated by a NULL.\r
-\r
- @retval NULL The best matching language could not be found in SupportedLanguages.\r
- @retval NULL There are not enough resources available to return the best matching\r
- language.\r
- @retval Other A pointer to a Null-terminated ASCII string that is the best matching\r
- language in SupportedLanguages.\r
-\r
-**/\r
-CHAR8 *\r
-EFIAPI\r
-VariableGetBestLanguage (\r
- IN CONST CHAR8 *SupportedLanguages,\r
- IN BOOLEAN Iso639Language,\r
- ...\r
- )\r
-{\r
- VA_LIST Args;\r
- CHAR8 *Language;\r
- UINTN CompareLength;\r
- UINTN LanguageLength;\r
- CONST CHAR8 *Supported;\r
- CHAR8 *Buffer;\r
-\r
- if (SupportedLanguages == NULL) {\r
- return NULL;\r
- }\r
-\r
- VA_START (Args, Iso639Language);\r
- while ((Language = VA_ARG (Args, CHAR8 *)) != NULL) {\r
- //\r
- // Default to ISO 639-2 mode\r
- //\r
- CompareLength = 3;\r
- LanguageLength = MIN (3, AsciiStrLen (Language));\r
-\r
- //\r
- // If in RFC 4646 mode, then determine the length of the first RFC 4646 language code in Language\r
- //\r
- if (!Iso639Language) {\r
- for (LanguageLength = 0; Language[LanguageLength] != 0 && Language[LanguageLength] != ';'; LanguageLength++);\r
- }\r
-\r
- //\r
- // Trim back the length of Language used until it is empty\r
- //\r
- while (LanguageLength > 0) {\r
- //\r
- // Loop through all language codes in SupportedLanguages\r
- //\r
- for (Supported = SupportedLanguages; *Supported != '\0'; Supported += CompareLength) {\r
- //\r
- // In RFC 4646 mode, then Loop through all language codes in SupportedLanguages\r
- //\r
- if (!Iso639Language) {\r
- //\r
- // Skip ';' characters in Supported\r
- //\r
- for (; *Supported != '\0' && *Supported == ';'; Supported++);\r
- //\r
- // Determine the length of the next language code in Supported\r
- //\r
- for (CompareLength = 0; Supported[CompareLength] != 0 && Supported[CompareLength] != ';'; CompareLength++);\r
- //\r
- // If Language is longer than the Supported, then skip to the next language\r
- //\r
- if (LanguageLength > CompareLength) {\r
- continue;\r
- }\r
- }\r
- //\r
- // See if the first LanguageLength characters in Supported match Language\r
- //\r
- if (AsciiStrnCmp (Supported, Language, LanguageLength) == 0) {\r
- VA_END (Args);\r
-\r
- Buffer = Iso639Language ? mVariableModuleGlobal->Lang : mVariableModuleGlobal->PlatformLang;\r
- Buffer[CompareLength] = '\0';\r
- return CopyMem (Buffer, Supported, CompareLength);\r
- }\r
- }\r
-\r
- if (Iso639Language) {\r
- //\r
- // If ISO 639 mode, then each language can only be tested once\r
- //\r
- LanguageLength = 0;\r
- } else {\r
- //\r
- // If RFC 4646 mode, then trim Language from the right to the next '-' character\r
- //\r
- for (LanguageLength--; LanguageLength > 0 && Language[LanguageLength] != '-'; LanguageLength--);\r
- }\r
- }\r
- }\r
- VA_END (Args);\r
-\r
- //\r
- // No matches were found\r
- //\r
- return NULL;\r
-}\r
-\r
-/**\r
- This function is to check if the remaining variable space is enough to set\r
- all Variables from argument list successfully. The purpose of the check\r
- is to keep the consistency of the Variables to be in variable storage.\r
-\r
- Note: Variables are assumed to be in same storage.\r
- The set sequence of Variables will be same with the sequence of VariableEntry from argument list,\r
- so follow the argument sequence to check the Variables.\r
-\r
- @param[in] Attributes Variable attributes for Variable entries.\r
- @param ... The variable argument list with type VARIABLE_ENTRY_CONSISTENCY *.\r
- A NULL terminates the list. The VariableSize of\r
- VARIABLE_ENTRY_CONSISTENCY is the variable data size as input.\r
- It will be changed to variable total size as output.\r
-\r
- @retval TRUE Have enough variable space to set the Variables successfully.\r
- @retval FALSE No enough variable space to set the Variables successfully.\r
-\r
-**/\r
-BOOLEAN\r
-EFIAPI\r
-CheckRemainingSpaceForConsistency (\r
- IN UINT32 Attributes,\r
- ...\r
- )\r
-{\r
- EFI_STATUS Status;\r
- VA_LIST Args;\r
- VARIABLE_ENTRY_CONSISTENCY *VariableEntry;\r
- UINT64 MaximumVariableStorageSize;\r
- UINT64 RemainingVariableStorageSize;\r
- UINT64 MaximumVariableSize;\r
- UINTN TotalNeededSize;\r
- UINTN OriginalVarSize;\r
- VARIABLE_STORE_HEADER *VariableStoreHeader;\r
- VARIABLE_POINTER_TRACK VariablePtrTrack;\r
- VARIABLE_HEADER *NextVariable;\r
- UINTN VarNameSize;\r
- UINTN VarDataSize;\r
-\r
- //\r
- // Non-Volatile related.\r
- //\r
- VariableStoreHeader = mNvVariableCache;\r
-\r
- Status = VariableServiceQueryVariableInfoInternal (\r
- Attributes,\r
- &MaximumVariableStorageSize,\r
- &RemainingVariableStorageSize,\r
- &MaximumVariableSize\r
- );\r
- ASSERT_EFI_ERROR (Status);\r
-\r
- TotalNeededSize = 0;\r
- VA_START (Args, Attributes);\r
- VariableEntry = VA_ARG (Args, VARIABLE_ENTRY_CONSISTENCY *);\r
- while (VariableEntry != NULL) {\r
- //\r
- // Calculate variable total size.\r
- //\r
- VarNameSize = StrSize (VariableEntry->Name);\r
- VarNameSize += GET_PAD_SIZE (VarNameSize);\r
- VarDataSize = VariableEntry->VariableSize;\r
- VarDataSize += GET_PAD_SIZE (VarDataSize);\r
- VariableEntry->VariableSize = HEADER_ALIGN (sizeof (VARIABLE_HEADER) + VarNameSize + VarDataSize);\r
-\r
- TotalNeededSize += VariableEntry->VariableSize;\r
- VariableEntry = VA_ARG (Args, VARIABLE_ENTRY_CONSISTENCY *);\r
- }\r
- VA_END (Args);\r
-\r
- if (RemainingVariableStorageSize >= TotalNeededSize) {\r
- //\r
- // Already have enough space.\r
- //\r
- return TRUE;\r
- } else if (AtRuntime ()) {\r
- //\r
- // At runtime, no reclaim.\r
- // The original variable space of Variables can't be reused.\r
- //\r
- return FALSE;\r
- }\r
-\r
- VA_START (Args, Attributes);\r
- VariableEntry = VA_ARG (Args, VARIABLE_ENTRY_CONSISTENCY *);\r
- while (VariableEntry != NULL) {\r
- //\r
- // Check if Variable[Index] has been present and get its size.\r
- //\r
- OriginalVarSize = 0;\r
- VariablePtrTrack.StartPtr = GetStartPointer (VariableStoreHeader);\r
- VariablePtrTrack.EndPtr = GetEndPointer (VariableStoreHeader);\r
- Status = FindVariableEx (\r
- VariableEntry->Name,\r
- VariableEntry->Guid,\r
- FALSE,\r
- &VariablePtrTrack\r
- );\r
- if (!EFI_ERROR (Status)) {\r
- //\r
- // Get size of Variable[Index].\r
- //\r
- NextVariable = GetNextVariablePtr (VariablePtrTrack.CurrPtr);\r
- OriginalVarSize = (UINTN) NextVariable - (UINTN) VariablePtrTrack.CurrPtr;\r
- //\r
- // Add the original size of Variable[Index] to remaining variable storage size.\r
- //\r
- RemainingVariableStorageSize += OriginalVarSize;\r
- }\r
- if (VariableEntry->VariableSize > RemainingVariableStorageSize) {\r
- //\r
- // No enough space for Variable[Index].\r
- //\r
- VA_END (Args);\r
- return FALSE;\r
- }\r
- //\r
- // Sub the (new) size of Variable[Index] from remaining variable storage size.\r
- //\r
- RemainingVariableStorageSize -= VariableEntry->VariableSize;\r
- VariableEntry = VA_ARG (Args, VARIABLE_ENTRY_CONSISTENCY *);\r
- }\r
- VA_END (Args);\r
-\r
- return TRUE;\r
-}\r
-\r
-/**\r
- Hook the operations in PlatformLangCodes, LangCodes, PlatformLang and Lang.\r
-\r
- When setting Lang/LangCodes, simultaneously update PlatformLang/PlatformLangCodes.\r
-\r
- According to UEFI spec, PlatformLangCodes/LangCodes are only set once in firmware initialization,\r
- and are read-only. Therefore, in variable driver, only store the original value for other use.\r
-\r
- @param[in] VariableName Name of variable.\r
-\r
- @param[in] Data Variable data.\r
-\r
- @param[in] DataSize Size of data. 0 means delete.\r
-\r
- @retval EFI_SUCCESS The update operation is successful or ignored.\r
- @retval EFI_WRITE_PROTECTED Update PlatformLangCodes/LangCodes at runtime.\r
- @retval EFI_OUT_OF_RESOURCES No enough variable space to do the update operation.\r
- @retval Others Other errors happened during the update operation.\r
-\r
-**/\r
-EFI_STATUS\r
-AutoUpdateLangVariable (\r
- IN CHAR16 *VariableName,\r
- IN VOID *Data,\r
- IN UINTN DataSize\r
- )\r
-{\r
- EFI_STATUS Status;\r
- CHAR8 *BestPlatformLang;\r
- CHAR8 *BestLang;\r
- UINTN Index;\r
- UINT32 Attributes;\r
- VARIABLE_POINTER_TRACK Variable;\r
- BOOLEAN SetLanguageCodes;\r
- VARIABLE_ENTRY_CONSISTENCY VariableEntry[2];\r
-\r
- //\r
- // Don't do updates for delete operation\r
- //\r
- if (DataSize == 0) {\r
- return EFI_SUCCESS;\r
- }\r
-\r
- SetLanguageCodes = FALSE;\r
-\r
- if (StrCmp (VariableName, EFI_PLATFORM_LANG_CODES_VARIABLE_NAME) == 0) {\r
- //\r
- // PlatformLangCodes is a volatile variable, so it can not be updated at runtime.\r
- //\r
- if (AtRuntime ()) {\r
- return EFI_WRITE_PROTECTED;\r
- }\r
-\r
- SetLanguageCodes = TRUE;\r
-\r
- //\r
- // According to UEFI spec, PlatformLangCodes is only set once in firmware initialization, and is read-only\r
- // Therefore, in variable driver, only store the original value for other use.\r
- //\r
- if (mVariableModuleGlobal->PlatformLangCodes != NULL) {\r
- FreePool (mVariableModuleGlobal->PlatformLangCodes);\r
- }\r
- mVariableModuleGlobal->PlatformLangCodes = AllocateRuntimeCopyPool (DataSize, Data);\r
- ASSERT (mVariableModuleGlobal->PlatformLangCodes != NULL);\r
-\r
- //\r
- // PlatformLang holds a single language from PlatformLangCodes,\r
- // so the size of PlatformLangCodes is enough for the PlatformLang.\r
- //\r
- if (mVariableModuleGlobal->PlatformLang != NULL) {\r
- FreePool (mVariableModuleGlobal->PlatformLang);\r
- }\r
- mVariableModuleGlobal->PlatformLang = AllocateRuntimePool (DataSize);\r
- ASSERT (mVariableModuleGlobal->PlatformLang != NULL);\r
-\r
- } else if (StrCmp (VariableName, EFI_LANG_CODES_VARIABLE_NAME) == 0) {\r
- //\r
- // LangCodes is a volatile variable, so it can not be updated at runtime.\r
- //\r
- if (AtRuntime ()) {\r
- return EFI_WRITE_PROTECTED;\r
- }\r
-\r
- SetLanguageCodes = TRUE;\r
-\r
- //\r
- // According to UEFI spec, LangCodes is only set once in firmware initialization, and is read-only\r
- // Therefore, in variable driver, only store the original value for other use.\r
- //\r
- if (mVariableModuleGlobal->LangCodes != NULL) {\r
- FreePool (mVariableModuleGlobal->LangCodes);\r
- }\r
- mVariableModuleGlobal->LangCodes = AllocateRuntimeCopyPool (DataSize, Data);\r
- ASSERT (mVariableModuleGlobal->LangCodes != NULL);\r
- }\r
-\r
- if (SetLanguageCodes\r
- && (mVariableModuleGlobal->PlatformLangCodes != NULL)\r
- && (mVariableModuleGlobal->LangCodes != NULL)) {\r
- //\r
- // Update Lang if PlatformLang is already set\r
- // Update PlatformLang if Lang is already set\r
- //\r
- Status = FindVariable (EFI_PLATFORM_LANG_VARIABLE_NAME, &gEfiGlobalVariableGuid, &Variable, &mVariableModuleGlobal->VariableGlobal, FALSE);\r
- if (!EFI_ERROR (Status)) {\r
- //\r
- // Update Lang\r
- //\r
- VariableName = EFI_PLATFORM_LANG_VARIABLE_NAME;\r
- Data = GetVariableDataPtr (Variable.CurrPtr);\r
- DataSize = Variable.CurrPtr->DataSize;\r
- } else {\r
- Status = FindVariable (EFI_LANG_VARIABLE_NAME, &gEfiGlobalVariableGuid, &Variable, &mVariableModuleGlobal->VariableGlobal, FALSE);\r
- if (!EFI_ERROR (Status)) {\r
- //\r
- // Update PlatformLang\r
- //\r
- VariableName = EFI_LANG_VARIABLE_NAME;\r
- Data = GetVariableDataPtr (Variable.CurrPtr);\r
- DataSize = Variable.CurrPtr->DataSize;\r
- } else {\r
- //\r
- // Neither PlatformLang nor Lang is set, directly return\r
- //\r
- return EFI_SUCCESS;\r
- }\r
- }\r
- }\r
-\r
- Status = EFI_SUCCESS;\r
-\r
- //\r
- // According to UEFI spec, "Lang" and "PlatformLang" is NV|BS|RT attributions.\r
- //\r
- Attributes = EFI_VARIABLE_NON_VOLATILE | EFI_VARIABLE_BOOTSERVICE_ACCESS | EFI_VARIABLE_RUNTIME_ACCESS;\r
-\r
- if (StrCmp (VariableName, EFI_PLATFORM_LANG_VARIABLE_NAME) == 0) {\r
- //\r
- // Update Lang when PlatformLangCodes/LangCodes were set.\r
- //\r
- if ((mVariableModuleGlobal->PlatformLangCodes != NULL) && (mVariableModuleGlobal->LangCodes != NULL)) {\r
- //\r
- // When setting PlatformLang, firstly get most matched language string from supported language codes.\r
- //\r
- BestPlatformLang = VariableGetBestLanguage (mVariableModuleGlobal->PlatformLangCodes, FALSE, Data, NULL);\r
- if (BestPlatformLang != NULL) {\r
- //\r
- // Get the corresponding index in language codes.\r
- //\r
- Index = GetIndexFromSupportedLangCodes (mVariableModuleGlobal->PlatformLangCodes, BestPlatformLang, FALSE);\r
-\r
- //\r
- // Get the corresponding ISO639 language tag according to RFC4646 language tag.\r
- //\r
- BestLang = GetLangFromSupportedLangCodes (mVariableModuleGlobal->LangCodes, Index, TRUE);\r
-\r
- //\r
- // Check the variable space for both Lang and PlatformLang variable.\r
- //\r
- VariableEntry[0].VariableSize = ISO_639_2_ENTRY_SIZE + 1;\r
- VariableEntry[0].Guid = &gEfiGlobalVariableGuid;\r
- VariableEntry[0].Name = EFI_LANG_VARIABLE_NAME;\r
-\r
- VariableEntry[1].VariableSize = AsciiStrSize (BestPlatformLang);\r
- VariableEntry[1].Guid = &gEfiGlobalVariableGuid;\r
- VariableEntry[1].Name = EFI_PLATFORM_LANG_VARIABLE_NAME;\r
- if (!CheckRemainingSpaceForConsistency (VARIABLE_ATTRIBUTE_NV_BS_RT, &VariableEntry[0], &VariableEntry[1], NULL)) {\r
- //\r
- // No enough variable space to set both Lang and PlatformLang successfully.\r
- //\r
- Status = EFI_OUT_OF_RESOURCES;\r
- } else {\r
- //\r
- // Successfully convert PlatformLang to Lang, and set the BestLang value into Lang variable simultaneously.\r
- //\r
- FindVariable (EFI_LANG_VARIABLE_NAME, &gEfiGlobalVariableGuid, &Variable, &mVariableModuleGlobal->VariableGlobal, FALSE);\r
-\r
- Status = UpdateVariable (EFI_LANG_VARIABLE_NAME, &gEfiGlobalVariableGuid, BestLang,\r
- ISO_639_2_ENTRY_SIZE + 1, Attributes, 0, 0, &Variable, NULL);\r
- }\r
-\r
- DEBUG ((EFI_D_INFO, "Variable Driver Auto Update PlatformLang, PlatformLang:%a, Lang:%a Status: %r\n", BestPlatformLang, BestLang, Status));\r
- }\r
- }\r
-\r
- } else if (StrCmp (VariableName, EFI_LANG_VARIABLE_NAME) == 0) {\r
- //\r
- // Update PlatformLang when PlatformLangCodes/LangCodes were set.\r
- //\r
- if ((mVariableModuleGlobal->PlatformLangCodes != NULL) && (mVariableModuleGlobal->LangCodes != NULL)) {\r
- //\r
- // When setting Lang, firstly get most matched language string from supported language codes.\r
- //\r
- BestLang = VariableGetBestLanguage (mVariableModuleGlobal->LangCodes, TRUE, Data, NULL);\r
- if (BestLang != NULL) {\r
- //\r
- // Get the corresponding index in language codes.\r
- //\r
- Index = GetIndexFromSupportedLangCodes (mVariableModuleGlobal->LangCodes, BestLang, TRUE);\r
-\r
- //\r
- // Get the corresponding RFC4646 language tag according to ISO639 language tag.\r
- //\r
- BestPlatformLang = GetLangFromSupportedLangCodes (mVariableModuleGlobal->PlatformLangCodes, Index, FALSE);\r
-\r
- //\r
- // Check the variable space for both PlatformLang and Lang variable.\r
- //\r
- VariableEntry[0].VariableSize = AsciiStrSize (BestPlatformLang);\r
- VariableEntry[0].Guid = &gEfiGlobalVariableGuid;\r
- VariableEntry[0].Name = EFI_PLATFORM_LANG_VARIABLE_NAME;\r
-\r
- VariableEntry[1].VariableSize = ISO_639_2_ENTRY_SIZE + 1;\r
- VariableEntry[1].Guid = &gEfiGlobalVariableGuid;\r
- VariableEntry[1].Name = EFI_LANG_VARIABLE_NAME;\r
- if (!CheckRemainingSpaceForConsistency (VARIABLE_ATTRIBUTE_NV_BS_RT, &VariableEntry[0], &VariableEntry[1], NULL)) {\r
- //\r
- // No enough variable space to set both PlatformLang and Lang successfully.\r
- //\r
- Status = EFI_OUT_OF_RESOURCES;\r
- } else {\r
- //\r
- // Successfully convert Lang to PlatformLang, and set the BestPlatformLang value into PlatformLang variable simultaneously.\r
- //\r
- FindVariable (EFI_PLATFORM_LANG_VARIABLE_NAME, &gEfiGlobalVariableGuid, &Variable, &mVariableModuleGlobal->VariableGlobal, FALSE);\r
-\r
- Status = UpdateVariable (EFI_PLATFORM_LANG_VARIABLE_NAME, &gEfiGlobalVariableGuid, BestPlatformLang,\r
- AsciiStrSize (BestPlatformLang), Attributes, 0, 0, &Variable, NULL);\r
- }\r
-\r
- DEBUG ((EFI_D_INFO, "Variable Driver Auto Update Lang, Lang:%a, PlatformLang:%a Status: %r\n", BestLang, BestPlatformLang, Status));\r
- }\r
- }\r
- }\r
-\r
- if (SetLanguageCodes) {\r
- //\r
- // Continue to set PlatformLangCodes or LangCodes.\r
- //\r
- return EFI_SUCCESS;\r
- } else {\r
- return Status;\r
- }\r
-}\r
-\r
-/**\r
- Update the variable region with Variable information. If EFI_VARIABLE_AUTHENTICATED_WRITE_ACCESS is set,\r
- index of associated public key is needed.\r
-\r
- @param[in] VariableName Name of variable.\r
- @param[in] VendorGuid Guid of variable.\r
- @param[in] Data Variable data.\r
- @param[in] DataSize Size of data. 0 means delete.\r
- @param[in] Attributes Attributes of the variable.\r
- @param[in] KeyIndex Index of associated public key.\r
- @param[in] MonotonicCount Value of associated monotonic count.\r
- @param[in, out] CacheVariable The variable information which is used to keep track of variable usage.\r
- @param[in] TimeStamp Value of associated TimeStamp.\r
-\r
- @retval EFI_SUCCESS The update operation is success.\r
- @retval EFI_OUT_OF_RESOURCES Variable region is full, can not write other data into this region.\r
-\r
-**/\r
-EFI_STATUS\r
-UpdateVariable (\r
- IN CHAR16 *VariableName,\r
- IN EFI_GUID *VendorGuid,\r
- IN VOID *Data,\r
- IN UINTN DataSize,\r
- IN UINT32 Attributes OPTIONAL,\r
- IN UINT32 KeyIndex OPTIONAL,\r
- IN UINT64 MonotonicCount OPTIONAL,\r
- IN OUT VARIABLE_POINTER_TRACK *CacheVariable,\r
- IN EFI_TIME *TimeStamp OPTIONAL\r
- )\r
-{\r
- EFI_STATUS Status;\r
- VARIABLE_HEADER *NextVariable;\r
- UINTN ScratchSize;\r
- UINTN MaxDataSize;\r
- UINTN VarNameOffset;\r
- UINTN VarDataOffset;\r
- UINTN VarNameSize;\r
- UINTN VarSize;\r
- BOOLEAN Volatile;\r
- EFI_FIRMWARE_VOLUME_BLOCK_PROTOCOL *Fvb;\r
- UINT8 State;\r
- VARIABLE_POINTER_TRACK *Variable;\r
- VARIABLE_POINTER_TRACK NvVariable;\r
- VARIABLE_STORE_HEADER *VariableStoreHeader;\r
- UINTN CacheOffset;\r
- UINT8 *BufferForMerge;\r
- UINTN MergedBufSize;\r
- BOOLEAN DataReady;\r
- UINTN DataOffset;\r
- BOOLEAN IsCommonVariable;\r
- BOOLEAN IsCommonUserVariable;\r
-\r
- if (mVariableModuleGlobal->FvbInstance == NULL) {\r
- //\r
- // The FVB protocol is not installed, so the EFI_VARIABLE_WRITE_ARCH_PROTOCOL is not installed.\r
- //\r
- if ((Attributes & EFI_VARIABLE_NON_VOLATILE) != 0) {\r
- //\r
- // Trying to update NV variable prior to the installation of EFI_VARIABLE_WRITE_ARCH_PROTOCOL\r
- //\r
- return EFI_NOT_AVAILABLE_YET;\r
- } else if ((Attributes & VARIABLE_ATTRIBUTE_AT_AW) != 0) {\r
- //\r
- // Trying to update volatile authenticated variable prior to the installation of EFI_VARIABLE_WRITE_ARCH_PROTOCOL\r
- // The authenticated variable perhaps is not initialized, just return here.\r
- //\r
- return EFI_NOT_AVAILABLE_YET;\r
- }\r
- }\r
-\r
- if ((CacheVariable->CurrPtr == NULL) || CacheVariable->Volatile) {\r
- Variable = CacheVariable;\r
- } else {\r
- //\r
- // Update/Delete existing NV variable.\r
- // CacheVariable points to the variable in the memory copy of Flash area\r
- // Now let Variable points to the same variable in Flash area.\r
- //\r
- VariableStoreHeader = (VARIABLE_STORE_HEADER *) ((UINTN) mVariableModuleGlobal->VariableGlobal.NonVolatileVariableBase);\r
- Variable = &NvVariable;\r
- Variable->StartPtr = GetStartPointer (VariableStoreHeader);\r
- Variable->EndPtr = GetEndPointer (VariableStoreHeader);\r
- Variable->CurrPtr = (VARIABLE_HEADER *)((UINTN)Variable->StartPtr + ((UINTN)CacheVariable->CurrPtr - (UINTN)CacheVariable->StartPtr));\r
- if (CacheVariable->InDeletedTransitionPtr != NULL) {\r
- Variable->InDeletedTransitionPtr = (VARIABLE_HEADER *)((UINTN)Variable->StartPtr + ((UINTN)CacheVariable->InDeletedTransitionPtr - (UINTN)CacheVariable->StartPtr));\r
- } else {\r
- Variable->InDeletedTransitionPtr = NULL;\r
- }\r
- Variable->Volatile = FALSE;\r
- }\r
-\r
- Fvb = mVariableModuleGlobal->FvbInstance;\r
-\r
- //\r
- // Tricky part: Use scratch data area at the end of volatile variable store\r
- // as a temporary storage.\r
- //\r
- NextVariable = GetEndPointer ((VARIABLE_STORE_HEADER *) ((UINTN) mVariableModuleGlobal->VariableGlobal.VolatileVariableBase));\r
- ScratchSize = mVariableModuleGlobal->ScratchBufferSize;\r
- SetMem (NextVariable, ScratchSize, 0xff);\r
- DataReady = FALSE;\r
-\r
- if (Variable->CurrPtr != NULL) {\r
- //\r
- // Update/Delete existing variable.\r
- //\r
- if (AtRuntime ()) {\r
- //\r
- // If AtRuntime and the variable is Volatile and Runtime Access,\r
- // the volatile is ReadOnly, and SetVariable should be aborted and\r
- // return EFI_WRITE_PROTECTED.\r
- //\r
- if (Variable->Volatile) {\r
- Status = EFI_WRITE_PROTECTED;\r
- goto Done;\r
- }\r
- //\r
- // Only variable that have NV attributes can be updated/deleted in Runtime.\r
- //\r
- if ((Variable->CurrPtr->Attributes & EFI_VARIABLE_NON_VOLATILE) == 0) {\r
- Status = EFI_INVALID_PARAMETER;\r
- goto Done;\r
- }\r
-\r
- //\r
- // Only variable that have RT attributes can be updated/deleted in Runtime.\r
- //\r
- if ((Variable->CurrPtr->Attributes & EFI_VARIABLE_RUNTIME_ACCESS) == 0) {\r
- Status = EFI_INVALID_PARAMETER;\r
- goto Done;\r
- }\r
- }\r
-\r
- //\r
- // Setting a data variable with no access, or zero DataSize attributes\r
- // causes it to be deleted.\r
- // When the EFI_VARIABLE_APPEND_WRITE attribute is set, DataSize of zero will\r
- // not delete the variable.\r
- //\r
- if ((((Attributes & EFI_VARIABLE_APPEND_WRITE) == 0) && (DataSize == 0))|| ((Attributes & (EFI_VARIABLE_RUNTIME_ACCESS | EFI_VARIABLE_BOOTSERVICE_ACCESS)) == 0)) {\r
- if (Variable->InDeletedTransitionPtr != NULL) {\r
- //\r
- // Both ADDED and IN_DELETED_TRANSITION variable are present,\r
- // set IN_DELETED_TRANSITION one to DELETED state first.\r
- //\r
- State = Variable->InDeletedTransitionPtr->State;\r
- State &= VAR_DELETED;\r
- Status = UpdateVariableStore (\r
- &mVariableModuleGlobal->VariableGlobal,\r
- Variable->Volatile,\r
- FALSE,\r
- Fvb,\r
- (UINTN) &Variable->InDeletedTransitionPtr->State,\r
- sizeof (UINT8),\r
- &State\r
- );\r
- if (!EFI_ERROR (Status)) {\r
- if (!Variable->Volatile) {\r
- ASSERT (CacheVariable->InDeletedTransitionPtr != NULL);\r
- CacheVariable->InDeletedTransitionPtr->State = State;\r
- }\r
- } else {\r
- goto Done;\r
- }\r
- }\r
-\r
- State = Variable->CurrPtr->State;\r
- State &= VAR_DELETED;\r
-\r
- Status = UpdateVariableStore (\r
- &mVariableModuleGlobal->VariableGlobal,\r
- Variable->Volatile,\r
- FALSE,\r
- Fvb,\r
- (UINTN) &Variable->CurrPtr->State,\r
- sizeof (UINT8),\r
- &State\r
- );\r
- if (!EFI_ERROR (Status)) {\r
- UpdateVariableInfo (VariableName, VendorGuid, Variable->Volatile, FALSE, FALSE, TRUE, FALSE);\r
- if (!Variable->Volatile) {\r
- CacheVariable->CurrPtr->State = State;\r
- FlushHobVariableToFlash (VariableName, VendorGuid);\r
- }\r
- }\r
- goto Done;\r
- }\r
- //\r
- // If the variable is marked valid, and the same data has been passed in,\r
- // then return to the caller immediately.\r
- //\r
- if (DataSizeOfVariable (Variable->CurrPtr) == DataSize &&\r
- (CompareMem (Data, GetVariableDataPtr (Variable->CurrPtr), DataSize) == 0) &&\r
- ((Attributes & EFI_VARIABLE_APPEND_WRITE) == 0) &&\r
- (TimeStamp == NULL)) {\r
- //\r
- // Variable content unchanged and no need to update timestamp, just return.\r
- //\r
- UpdateVariableInfo (VariableName, VendorGuid, Variable->Volatile, FALSE, TRUE, FALSE, FALSE);\r
- Status = EFI_SUCCESS;\r
- goto Done;\r
- } else if ((Variable->CurrPtr->State == VAR_ADDED) ||\r
- (Variable->CurrPtr->State == (VAR_ADDED & VAR_IN_DELETED_TRANSITION))) {\r
-\r
- //\r
- // EFI_VARIABLE_APPEND_WRITE attribute only effects for existing variable\r
- //\r
- if ((Attributes & EFI_VARIABLE_APPEND_WRITE) != 0) {\r
- //\r
- // NOTE: From 0 to DataOffset of NextVariable is reserved for Variable Header and Name.\r
- // From DataOffset of NextVariable is to save the existing variable data.\r
- //\r
- DataOffset = sizeof (VARIABLE_HEADER) + Variable->CurrPtr->NameSize + GET_PAD_SIZE (Variable->CurrPtr->NameSize);\r
- BufferForMerge = (UINT8 *) ((UINTN) NextVariable + DataOffset);\r
- CopyMem (BufferForMerge, (UINT8 *) ((UINTN) Variable->CurrPtr + DataOffset), Variable->CurrPtr->DataSize);\r
-\r
- //\r
- // Set Max Common/Auth Variable Data Size as default MaxDataSize\r
- //\r
- if ((Attributes & VARIABLE_ATTRIBUTE_AT_AW) != 0) {\r
- MaxDataSize = mVariableModuleGlobal->MaxAuthVariableSize - DataOffset;\r
- } else {\r
- MaxDataSize = mVariableModuleGlobal->MaxVariableSize - DataOffset;\r
- }\r
-\r
- if ((CompareGuid (VendorGuid, &gEfiImageSecurityDatabaseGuid) &&\r
- ((StrCmp (VariableName, EFI_IMAGE_SECURITY_DATABASE) == 0) || (StrCmp (VariableName, EFI_IMAGE_SECURITY_DATABASE1) == 0) ||\r
- (StrCmp (VariableName, EFI_IMAGE_SECURITY_DATABASE2) == 0))) ||\r
- (CompareGuid (VendorGuid, &gEfiGlobalVariableGuid) && (StrCmp (VariableName, EFI_KEY_EXCHANGE_KEY_NAME) == 0))) {\r
- //\r
- // For variables with formatted as EFI_SIGNATURE_LIST, the driver shall not perform an append of\r
- // EFI_SIGNATURE_DATA values that are already part of the existing variable value.\r
- //\r
- Status = AppendSignatureList (\r
- BufferForMerge,\r
- Variable->CurrPtr->DataSize,\r
- MaxDataSize - Variable->CurrPtr->DataSize,\r
- Data,\r
- DataSize,\r
- &MergedBufSize\r
- );\r
- if (Status == EFI_BUFFER_TOO_SMALL) {\r
- //\r
- // Signature List is too long, Failed to Append.\r
- //\r
- Status = EFI_INVALID_PARAMETER;\r
- goto Done;\r
- }\r
-\r
- if (MergedBufSize == Variable->CurrPtr->DataSize) {\r
- if ((TimeStamp == NULL) || CompareTimeStamp (TimeStamp, &Variable->CurrPtr->TimeStamp)) {\r
- //\r
- // New EFI_SIGNATURE_DATA is not found and timestamp is not later\r
- // than current timestamp, return EFI_SUCCESS directly.\r
- //\r
- UpdateVariableInfo (VariableName, VendorGuid, Variable->Volatile, FALSE, TRUE, FALSE, FALSE);\r
- Status = EFI_SUCCESS;\r
- goto Done;\r
- }\r
- }\r
- } else {\r
- //\r
- // For other Variables, append the new data to the end of existing data.\r
- // Max Harware error record variable data size is different from common/auth variable\r
- //\r
- if ((Attributes & EFI_VARIABLE_HARDWARE_ERROR_RECORD) == EFI_VARIABLE_HARDWARE_ERROR_RECORD) {\r
- MaxDataSize = PcdGet32 (PcdMaxHardwareErrorVariableSize) - DataOffset;\r
- }\r
-\r
- if (Variable->CurrPtr->DataSize + DataSize > MaxDataSize) {\r
- //\r
- // Existing data size + new data size exceed maximum variable size limitation.\r
- //\r
- Status = EFI_INVALID_PARAMETER;\r
- goto Done;\r
- }\r
- CopyMem ((UINT8*) ((UINTN) BufferForMerge + Variable->CurrPtr->DataSize), Data, DataSize);\r
- MergedBufSize = Variable->CurrPtr->DataSize + DataSize;\r
- }\r
-\r
- //\r
- // BufferForMerge(from DataOffset of NextVariable) has included the merged existing and new data.\r
- //\r
- Data = BufferForMerge;\r
- DataSize = MergedBufSize;\r
- DataReady = TRUE;\r
- }\r
-\r
- //\r
- // Mark the old variable as in delete transition.\r
- //\r
- State = Variable->CurrPtr->State;\r
- State &= VAR_IN_DELETED_TRANSITION;\r
-\r
- Status = UpdateVariableStore (\r
- &mVariableModuleGlobal->VariableGlobal,\r
- Variable->Volatile,\r
- FALSE,\r
- Fvb,\r
- (UINTN) &Variable->CurrPtr->State,\r
- sizeof (UINT8),\r
- &State\r
- );\r
- if (EFI_ERROR (Status)) {\r
- goto Done;\r
- }\r
- if (!Variable->Volatile) {\r
- CacheVariable->CurrPtr->State = State;\r
- }\r
- }\r
- } else {\r
- //\r
- // Not found existing variable. Create a new variable.\r
- //\r
-\r
- if ((DataSize == 0) && ((Attributes & EFI_VARIABLE_APPEND_WRITE) != 0)) {\r
- Status = EFI_SUCCESS;\r
- goto Done;\r
- }\r
-\r
- //\r
- // Make sure we are trying to create a new variable.\r
- // Setting a data variable with zero DataSize or no access attributes means to delete it.\r
- //\r
- if (DataSize == 0 || (Attributes & (EFI_VARIABLE_RUNTIME_ACCESS | EFI_VARIABLE_BOOTSERVICE_ACCESS)) == 0) {\r
- Status = EFI_NOT_FOUND;\r
- goto Done;\r
- }\r
-\r
- //\r
- // Only variable have NV|RT attribute can be created in Runtime.\r
- //\r
- if (AtRuntime () &&\r
- (((Attributes & EFI_VARIABLE_RUNTIME_ACCESS) == 0) || ((Attributes & EFI_VARIABLE_NON_VOLATILE) == 0))) {\r
- Status = EFI_INVALID_PARAMETER;\r
- goto Done;\r
- }\r
- }\r
-\r
- //\r
- // Function part - create a new variable and copy the data.\r
- // Both update a variable and create a variable will come here.\r
- //\r
- NextVariable->StartId = VARIABLE_DATA;\r
- //\r
- // NextVariable->State = VAR_ADDED;\r
- //\r
- NextVariable->Reserved = 0;\r
- NextVariable->PubKeyIndex = KeyIndex;\r
- NextVariable->MonotonicCount = MonotonicCount;\r
- ZeroMem (&NextVariable->TimeStamp, sizeof (EFI_TIME));\r
-\r
- if (((Attributes & EFI_VARIABLE_TIME_BASED_AUTHENTICATED_WRITE_ACCESS) != 0) &&\r
- (TimeStamp != NULL)) {\r
- if ((Attributes & EFI_VARIABLE_APPEND_WRITE) == 0) {\r
- CopyMem (&NextVariable->TimeStamp, TimeStamp, sizeof (EFI_TIME));\r
- } else {\r
- //\r
- // In the case when the EFI_VARIABLE_APPEND_WRITE attribute is set, only\r
- // when the new TimeStamp value is later than the current timestamp associated\r
- // with the variable, we need associate the new timestamp with the updated value.\r
- //\r
- if (Variable->CurrPtr != NULL) {\r
- if (CompareTimeStamp (&Variable->CurrPtr->TimeStamp, TimeStamp)) {\r
- CopyMem (&NextVariable->TimeStamp, TimeStamp, sizeof (EFI_TIME));\r
- }\r
- }\r
- }\r
- }\r
-\r
- //\r
- // The EFI_VARIABLE_APPEND_WRITE attribute will never be set in the returned\r
- // Attributes bitmask parameter of a GetVariable() call.\r
- //\r
- NextVariable->Attributes = Attributes & (~EFI_VARIABLE_APPEND_WRITE);\r
-\r
- VarNameOffset = sizeof (VARIABLE_HEADER);\r
- VarNameSize = StrSize (VariableName);\r
- CopyMem (\r
- (UINT8 *) ((UINTN) NextVariable + VarNameOffset),\r
- VariableName,\r
- VarNameSize\r
- );\r
- VarDataOffset = VarNameOffset + VarNameSize + GET_PAD_SIZE (VarNameSize);\r
-\r
- //\r
- // If DataReady is TRUE, it means the variable data has been saved into\r
- // NextVariable during EFI_VARIABLE_APPEND_WRITE operation preparation.\r
- //\r
- if (!DataReady) {\r
- CopyMem (\r
- (UINT8 *) ((UINTN) NextVariable + VarDataOffset),\r
- Data,\r
- DataSize\r
- );\r
- }\r
-\r
- CopyMem (&NextVariable->VendorGuid, VendorGuid, sizeof (EFI_GUID));\r
- //\r
- // There will be pad bytes after Data, the NextVariable->NameSize and\r
- // NextVariable->DataSize should not include pad size so that variable\r
- // service can get actual size in GetVariable.\r
- //\r
- NextVariable->NameSize = (UINT32)VarNameSize;\r
- NextVariable->DataSize = (UINT32)DataSize;\r
-\r
- //\r
- // The actual size of the variable that stores in storage should\r
- // include pad size.\r
- //\r
- VarSize = VarDataOffset + DataSize + GET_PAD_SIZE (DataSize);\r
- if ((Attributes & EFI_VARIABLE_NON_VOLATILE) != 0) {\r
- //\r
- // Create a nonvolatile variable.\r
- //\r
- Volatile = FALSE;\r
-\r
- IsCommonVariable = FALSE;\r
- IsCommonUserVariable = FALSE;\r
- if ((Attributes & EFI_VARIABLE_HARDWARE_ERROR_RECORD) == 0) {\r
- IsCommonVariable = TRUE;\r
- IsCommonUserVariable = IsUserVariable (NextVariable);\r
- }\r
- if ((((Attributes & EFI_VARIABLE_HARDWARE_ERROR_RECORD) != 0)\r
- && ((VarSize + mVariableModuleGlobal->HwErrVariableTotalSize) > PcdGet32 (PcdHwErrStorageSize)))\r
- || (IsCommonVariable && ((VarSize + mVariableModuleGlobal->CommonVariableTotalSize) > mVariableModuleGlobal->CommonVariableSpace))\r
- || (IsCommonVariable && AtRuntime () && ((VarSize + mVariableModuleGlobal->CommonVariableTotalSize) > mVariableModuleGlobal->CommonRuntimeVariableSpace))\r
- || (IsCommonUserVariable && ((VarSize + mVariableModuleGlobal->CommonUserVariableTotalSize) > mVariableModuleGlobal->CommonMaxUserVariableSpace))) {\r
- if (AtRuntime ()) {\r
- if (IsCommonUserVariable && ((VarSize + mVariableModuleGlobal->CommonUserVariableTotalSize) > mVariableModuleGlobal->CommonMaxUserVariableSpace)) {\r
- RecordVarErrorFlag (VAR_ERROR_FLAG_USER_ERROR, VariableName, VendorGuid, Attributes, VarSize);\r
- }\r
- if (IsCommonVariable && ((VarSize + mVariableModuleGlobal->CommonVariableTotalSize) > mVariableModuleGlobal->CommonRuntimeVariableSpace)) {\r
- RecordVarErrorFlag (VAR_ERROR_FLAG_SYSTEM_ERROR, VariableName, VendorGuid, Attributes, VarSize);\r
- }\r
- Status = EFI_OUT_OF_RESOURCES;\r
- goto Done;\r
- }\r
- //\r
- // Perform garbage collection & reclaim operation, and integrate the new variable at the same time.\r
- //\r
- Status = Reclaim (\r
- mVariableModuleGlobal->VariableGlobal.NonVolatileVariableBase,\r
- &mVariableModuleGlobal->NonVolatileLastVariableOffset,\r
- FALSE,\r
- Variable,\r
- NextVariable,\r
- HEADER_ALIGN (VarSize),\r
- FALSE\r
- );\r
- if (!EFI_ERROR (Status)) {\r
- //\r
- // The new variable has been integrated successfully during reclaiming.\r
- //\r
- if (Variable->CurrPtr != NULL) {\r
- CacheVariable->CurrPtr = (VARIABLE_HEADER *)((UINTN) CacheVariable->StartPtr + ((UINTN) Variable->CurrPtr - (UINTN) Variable->StartPtr));\r
- CacheVariable->InDeletedTransitionPtr = NULL;\r
- }\r
- UpdateVariableInfo (VariableName, VendorGuid, FALSE, FALSE, TRUE, FALSE, FALSE);\r
- FlushHobVariableToFlash (VariableName, VendorGuid);\r
- } else {\r
- if (IsCommonUserVariable && ((VarSize + mVariableModuleGlobal->CommonUserVariableTotalSize) > mVariableModuleGlobal->CommonMaxUserVariableSpace)) {\r
- RecordVarErrorFlag (VAR_ERROR_FLAG_USER_ERROR, VariableName, VendorGuid, Attributes, VarSize);\r
- }\r
- if (IsCommonVariable && ((VarSize + mVariableModuleGlobal->CommonVariableTotalSize) > mVariableModuleGlobal->CommonVariableSpace)) {\r
- RecordVarErrorFlag (VAR_ERROR_FLAG_SYSTEM_ERROR, VariableName, VendorGuid, Attributes, VarSize);\r
- }\r
- }\r
- goto Done;\r
- }\r
- //\r
- // Four steps\r
- // 1. Write variable header\r
- // 2. Set variable state to header valid\r
- // 3. Write variable data\r
- // 4. Set variable state to valid\r
- //\r
- //\r
- // Step 1:\r
- //\r
- CacheOffset = mVariableModuleGlobal->NonVolatileLastVariableOffset;\r
- Status = UpdateVariableStore (\r
- &mVariableModuleGlobal->VariableGlobal,\r
- FALSE,\r
- TRUE,\r
- Fvb,\r
- mVariableModuleGlobal->NonVolatileLastVariableOffset,\r
- sizeof (VARIABLE_HEADER),\r
- (UINT8 *) NextVariable\r
- );\r
-\r
- if (EFI_ERROR (Status)) {\r
- goto Done;\r
- }\r
-\r
- //\r
- // Step 2:\r
- //\r
- NextVariable->State = VAR_HEADER_VALID_ONLY;\r
- Status = UpdateVariableStore (\r
- &mVariableModuleGlobal->VariableGlobal,\r
- FALSE,\r
- TRUE,\r
- Fvb,\r
- mVariableModuleGlobal->NonVolatileLastVariableOffset + OFFSET_OF (VARIABLE_HEADER, State),\r
- sizeof (UINT8),\r
- &NextVariable->State\r
- );\r
-\r
- if (EFI_ERROR (Status)) {\r
- goto Done;\r
- }\r
- //\r
- // Step 3:\r
- //\r
- Status = UpdateVariableStore (\r
- &mVariableModuleGlobal->VariableGlobal,\r
- FALSE,\r
- TRUE,\r
- Fvb,\r
- mVariableModuleGlobal->NonVolatileLastVariableOffset + sizeof (VARIABLE_HEADER),\r
- (UINT32) VarSize - sizeof (VARIABLE_HEADER),\r
- (UINT8 *) NextVariable + sizeof (VARIABLE_HEADER)\r
- );\r
-\r
- if (EFI_ERROR (Status)) {\r
- goto Done;\r
- }\r
- //\r
- // Step 4:\r
- //\r
- NextVariable->State = VAR_ADDED;\r
- Status = UpdateVariableStore (\r
- &mVariableModuleGlobal->VariableGlobal,\r
- FALSE,\r
- TRUE,\r
- Fvb,\r
- mVariableModuleGlobal->NonVolatileLastVariableOffset + OFFSET_OF (VARIABLE_HEADER, State),\r
- sizeof (UINT8),\r
- &NextVariable->State\r
- );\r
-\r
- if (EFI_ERROR (Status)) {\r
- goto Done;\r
- }\r
-\r
- mVariableModuleGlobal->NonVolatileLastVariableOffset += HEADER_ALIGN (VarSize);\r
-\r
- if ((Attributes & EFI_VARIABLE_HARDWARE_ERROR_RECORD) != 0) {\r
- mVariableModuleGlobal->HwErrVariableTotalSize += HEADER_ALIGN (VarSize);\r
- } else {\r
- mVariableModuleGlobal->CommonVariableTotalSize += HEADER_ALIGN (VarSize);\r
- if (IsCommonUserVariable) {\r
- mVariableModuleGlobal->CommonUserVariableTotalSize += HEADER_ALIGN (VarSize);\r
- }\r
- }\r
- //\r
- // update the memory copy of Flash region.\r
- //\r
- CopyMem ((UINT8 *)mNvVariableCache + CacheOffset, (UINT8 *)NextVariable, VarSize);\r
- } else {\r
- //\r
- // Create a volatile variable.\r
- //\r
- Volatile = TRUE;\r
-\r
- if ((UINT32) (VarSize + mVariableModuleGlobal->VolatileLastVariableOffset) >\r
- ((VARIABLE_STORE_HEADER *) ((UINTN) (mVariableModuleGlobal->VariableGlobal.VolatileVariableBase)))->Size) {\r
- //\r
- // Perform garbage collection & reclaim operation, and integrate the new variable at the same time.\r
- //\r
- Status = Reclaim (\r
- mVariableModuleGlobal->VariableGlobal.VolatileVariableBase,\r
- &mVariableModuleGlobal->VolatileLastVariableOffset,\r
- TRUE,\r
- Variable,\r
- NextVariable,\r
- HEADER_ALIGN (VarSize),\r
- FALSE\r
- );\r
- if (!EFI_ERROR (Status)) {\r
- //\r
- // The new variable has been integrated successfully during reclaiming.\r
- //\r
- if (Variable->CurrPtr != NULL) {\r
- CacheVariable->CurrPtr = (VARIABLE_HEADER *)((UINTN) CacheVariable->StartPtr + ((UINTN) Variable->CurrPtr - (UINTN) Variable->StartPtr));\r
- CacheVariable->InDeletedTransitionPtr = NULL;\r
- }\r
- UpdateVariableInfo (VariableName, VendorGuid, TRUE, FALSE, TRUE, FALSE, FALSE);\r
- }\r
- goto Done;\r
- }\r
-\r
- NextVariable->State = VAR_ADDED;\r
- Status = UpdateVariableStore (\r
- &mVariableModuleGlobal->VariableGlobal,\r
- TRUE,\r
- TRUE,\r
- Fvb,\r
- mVariableModuleGlobal->VolatileLastVariableOffset,\r
- (UINT32) VarSize,\r
- (UINT8 *) NextVariable\r
- );\r
-\r
- if (EFI_ERROR (Status)) {\r
- goto Done;\r
- }\r
-\r
- mVariableModuleGlobal->VolatileLastVariableOffset += HEADER_ALIGN (VarSize);\r
- }\r
-\r
- //\r
- // Mark the old variable as deleted.\r
- //\r
- if (!EFI_ERROR (Status) && Variable->CurrPtr != NULL) {\r
- if (Variable->InDeletedTransitionPtr != NULL) {\r
- //\r
- // Both ADDED and IN_DELETED_TRANSITION old variable are present,\r
- // set IN_DELETED_TRANSITION one to DELETED state first.\r
- //\r
- State = Variable->InDeletedTransitionPtr->State;\r
- State &= VAR_DELETED;\r
- Status = UpdateVariableStore (\r
- &mVariableModuleGlobal->VariableGlobal,\r
- Variable->Volatile,\r
- FALSE,\r
- Fvb,\r
- (UINTN) &Variable->InDeletedTransitionPtr->State,\r
- sizeof (UINT8),\r
- &State\r
- );\r
- if (!EFI_ERROR (Status)) {\r
- if (!Variable->Volatile) {\r
- ASSERT (CacheVariable->InDeletedTransitionPtr != NULL);\r
- CacheVariable->InDeletedTransitionPtr->State = State;\r
- }\r
- } else {\r
- goto Done;\r
- }\r
- }\r
-\r
- State = Variable->CurrPtr->State;\r
- State &= VAR_DELETED;\r
-\r
- Status = UpdateVariableStore (\r
- &mVariableModuleGlobal->VariableGlobal,\r
- Variable->Volatile,\r
- FALSE,\r
- Fvb,\r
- (UINTN) &Variable->CurrPtr->State,\r
- sizeof (UINT8),\r
- &State\r
- );\r
- if (!EFI_ERROR (Status) && !Variable->Volatile) {\r
- CacheVariable->CurrPtr->State = State;\r
- }\r
- }\r
-\r
- if (!EFI_ERROR (Status)) {\r
- UpdateVariableInfo (VariableName, VendorGuid, Volatile, FALSE, TRUE, FALSE, FALSE);\r
- if (!Volatile) {\r
- FlushHobVariableToFlash (VariableName, VendorGuid);\r
- }\r
- }\r
-\r
-Done:\r
- return Status;\r
-}\r
-\r
-/**\r
- Check if a Unicode character is a hexadecimal character.\r
-\r
- This function checks if a Unicode character is a\r
- hexadecimal character. The valid hexadecimal character is\r
- L'0' to L'9', L'a' to L'f', or L'A' to L'F'.\r
-\r
-\r
- @param Char The character to check against.\r
-\r
- @retval TRUE If the Char is a hexadecmial character.\r
- @retval FALSE If the Char is not a hexadecmial character.\r
-\r
-**/\r
-BOOLEAN\r
-EFIAPI\r
-IsHexaDecimalDigitCharacter (\r
- IN CHAR16 Char\r
- )\r
-{\r
- return (BOOLEAN) ((Char >= L'0' && Char <= L'9') || (Char >= L'A' && Char <= L'F') || (Char >= L'a' && Char <= L'f'));\r
-}\r
-\r
-/**\r
-\r
- This code checks if variable is hardware error record variable or not.\r
-\r
- According to UEFI spec, hardware error record variable should use the EFI_HARDWARE_ERROR_VARIABLE VendorGuid\r
- and have the L"HwErrRec####" name convention, #### is a printed hex value and no 0x or h is included in the hex value.\r
-\r
- @param VariableName Pointer to variable name.\r
- @param VendorGuid Variable Vendor Guid.\r
-\r
- @retval TRUE Variable is hardware error record variable.\r
- @retval FALSE Variable is not hardware error record variable.\r
-\r
-**/\r
-BOOLEAN\r
-EFIAPI\r
-IsHwErrRecVariable (\r
- IN CHAR16 *VariableName,\r
- IN EFI_GUID *VendorGuid\r
- )\r
-{\r
- if (!CompareGuid (VendorGuid, &gEfiHardwareErrorVariableGuid) ||\r
- (StrLen (VariableName) != StrLen (L"HwErrRec####")) ||\r
- (StrnCmp(VariableName, L"HwErrRec", StrLen (L"HwErrRec")) != 0) ||\r
- !IsHexaDecimalDigitCharacter (VariableName[0x8]) ||\r
- !IsHexaDecimalDigitCharacter (VariableName[0x9]) ||\r
- !IsHexaDecimalDigitCharacter (VariableName[0xA]) ||\r
- !IsHexaDecimalDigitCharacter (VariableName[0xB])) {\r
- return FALSE;\r
- }\r
-\r
- return TRUE;\r
-}\r
-\r
-/**\r
- Mark a variable that will become read-only after leaving the DXE phase of execution.\r
-\r
- @param[in] This The VARIABLE_LOCK_PROTOCOL instance.\r
- @param[in] VariableName A pointer to the variable name that will be made read-only subsequently.\r
- @param[in] VendorGuid A pointer to the vendor GUID that will be made read-only subsequently.\r
-\r
- @retval EFI_SUCCESS The variable specified by the VariableName and the VendorGuid was marked\r
- as pending to be read-only.\r
- @retval EFI_INVALID_PARAMETER VariableName or VendorGuid is NULL.\r
- Or VariableName is an empty string.\r
- @retval EFI_ACCESS_DENIED EFI_END_OF_DXE_EVENT_GROUP_GUID or EFI_EVENT_GROUP_READY_TO_BOOT has\r
- already been signaled.\r
- @retval EFI_OUT_OF_RESOURCES There is not enough resource to hold the lock request.\r
-**/\r
-EFI_STATUS\r
-EFIAPI\r
-VariableLockRequestToLock (\r
- IN CONST EDKII_VARIABLE_LOCK_PROTOCOL *This,\r
- IN CHAR16 *VariableName,\r
- IN EFI_GUID *VendorGuid\r
- )\r
-{\r
- VARIABLE_ENTRY *Entry;\r
- CHAR16 *Name;\r
- LIST_ENTRY *Link;\r
- VARIABLE_ENTRY *LockedEntry;\r
-\r
- if (VariableName == NULL || VariableName[0] == 0 || VendorGuid == NULL) {\r
- return EFI_INVALID_PARAMETER;\r
- }\r
-\r
- if (mEndOfDxe) {\r
- return EFI_ACCESS_DENIED;\r
- }\r
-\r
- Entry = AllocateRuntimeZeroPool (sizeof (*Entry) + StrSize (VariableName));\r
- if (Entry == NULL) {\r
- return EFI_OUT_OF_RESOURCES;\r
- }\r
-\r
- DEBUG ((EFI_D_INFO, "[Variable] Lock: %g:%s\n", VendorGuid, VariableName));\r
-\r
- AcquireLockOnlyAtBootTime(&mVariableModuleGlobal->VariableGlobal.VariableServicesLock);\r
-\r
- for ( Link = GetFirstNode (&mLockedVariableList)\r
- ; !IsNull (&mLockedVariableList, Link)\r
- ; Link = GetNextNode (&mLockedVariableList, Link)\r
- ) {\r
- LockedEntry = BASE_CR (Link, VARIABLE_ENTRY, Link);\r
- Name = (CHAR16 *) ((UINTN) LockedEntry + sizeof (*LockedEntry));\r
- if (CompareGuid (&LockedEntry->Guid, VendorGuid) && (StrCmp (Name, VariableName) == 0)) {\r
- goto Done;\r
- }\r
- }\r
-\r
- Name = (CHAR16 *) ((UINTN) Entry + sizeof (*Entry));\r
- StrnCpy (Name, VariableName, StrLen (VariableName));\r
- CopyGuid (&Entry->Guid, VendorGuid);\r
- InsertTailList (&mLockedVariableList, &Entry->Link);\r
-\r
-Done:\r
- ReleaseLockOnlyAtBootTime (&mVariableModuleGlobal->VariableGlobal.VariableServicesLock);\r
-\r
- return EFI_SUCCESS;\r
-}\r
-\r
-/**\r
-\r
- This code finds variable in storage blocks (Volatile or Non-Volatile).\r
-\r
- Caution: This function may receive untrusted input.\r
- This function may be invoked in SMM mode, and datasize is external input.\r
- This function will do basic validation, before parse the data.\r
-\r
- @param VariableName Name of Variable to be found.\r
- @param VendorGuid Variable vendor GUID.\r
- @param Attributes Attribute value of the variable found.\r
- @param DataSize Size of Data found. If size is less than the\r
- data, this value contains the required size.\r
- @param Data Data pointer.\r
-\r
- @return EFI_INVALID_PARAMETER Invalid parameter.\r
- @return EFI_SUCCESS Find the specified variable.\r
- @return EFI_NOT_FOUND Not found.\r
- @return EFI_BUFFER_TO_SMALL DataSize is too small for the result.\r
-\r
-**/\r
-EFI_STATUS\r
-EFIAPI\r
-VariableServiceGetVariable (\r
- IN CHAR16 *VariableName,\r
- IN EFI_GUID *VendorGuid,\r
- OUT UINT32 *Attributes OPTIONAL,\r
- IN OUT UINTN *DataSize,\r
- OUT VOID *Data\r
- )\r
-{\r
- EFI_STATUS Status;\r
- VARIABLE_POINTER_TRACK Variable;\r
- UINTN VarDataSize;\r
-\r
- if (VariableName == NULL || VendorGuid == NULL || DataSize == NULL) {\r
- return EFI_INVALID_PARAMETER;\r
- }\r
-\r
- AcquireLockOnlyAtBootTime(&mVariableModuleGlobal->VariableGlobal.VariableServicesLock);\r
-\r
- Status = FindVariable (VariableName, VendorGuid, &Variable, &mVariableModuleGlobal->VariableGlobal, FALSE);\r
- if (Variable.CurrPtr == NULL || EFI_ERROR (Status)) {\r
- goto Done;\r
- }\r
-\r
- //\r
- // Get data size\r
- //\r
- VarDataSize = DataSizeOfVariable (Variable.CurrPtr);\r
- ASSERT (VarDataSize != 0);\r
-\r
- if (*DataSize >= VarDataSize) {\r
- if (Data == NULL) {\r
- Status = EFI_INVALID_PARAMETER;\r
- goto Done;\r
- }\r
-\r
- CopyMem (Data, GetVariableDataPtr (Variable.CurrPtr), VarDataSize);\r
- if (Attributes != NULL) {\r
- *Attributes = Variable.CurrPtr->Attributes;\r
- }\r
-\r
- *DataSize = VarDataSize;\r
- UpdateVariableInfo (VariableName, VendorGuid, Variable.Volatile, TRUE, FALSE, FALSE, FALSE);\r
-\r
- Status = EFI_SUCCESS;\r
- goto Done;\r
- } else {\r
- *DataSize = VarDataSize;\r
- Status = EFI_BUFFER_TOO_SMALL;\r
- goto Done;\r
- }\r
-\r
-Done:\r
- ReleaseLockOnlyAtBootTime (&mVariableModuleGlobal->VariableGlobal.VariableServicesLock);\r
- return Status;\r
-}\r
-\r
-\r
-\r
-/**\r
-\r
- This code Finds the Next available variable.\r
-\r
- Caution: This function may receive untrusted input.\r
- This function may be invoked in SMM mode. This function will do basic validation, before parse the data.\r
-\r
- @param VariableNameSize Size of the variable name.\r
- @param VariableName Pointer to variable name.\r
- @param VendorGuid Variable Vendor Guid.\r
-\r
- @return EFI_INVALID_PARAMETER Invalid parameter.\r
- @return EFI_SUCCESS Find the specified variable.\r
- @return EFI_NOT_FOUND Not found.\r
- @return EFI_BUFFER_TO_SMALL DataSize is too small for the result.\r
-\r
-**/\r
-EFI_STATUS\r
-EFIAPI\r
-VariableServiceGetNextVariableName (\r
- IN OUT UINTN *VariableNameSize,\r
- IN OUT CHAR16 *VariableName,\r
- IN OUT EFI_GUID *VendorGuid\r
- )\r
-{\r
- VARIABLE_STORE_TYPE Type;\r
- VARIABLE_POINTER_TRACK Variable;\r
- VARIABLE_POINTER_TRACK VariableInHob;\r
- VARIABLE_POINTER_TRACK VariablePtrTrack;\r
- UINTN VarNameSize;\r
- EFI_STATUS Status;\r
- VARIABLE_STORE_HEADER *VariableStoreHeader[VariableStoreTypeMax];\r
-\r
- if (VariableNameSize == NULL || VariableName == NULL || VendorGuid == NULL) {\r
- return EFI_INVALID_PARAMETER;\r
- }\r
-\r
- AcquireLockOnlyAtBootTime(&mVariableModuleGlobal->VariableGlobal.VariableServicesLock);\r
-\r
- Status = FindVariable (VariableName, VendorGuid, &Variable, &mVariableModuleGlobal->VariableGlobal, FALSE);\r
- if (Variable.CurrPtr == NULL || EFI_ERROR (Status)) {\r
- goto Done;\r
- }\r
-\r
- if (VariableName[0] != 0) {\r
- //\r
- // If variable name is not NULL, get next variable.\r
- //\r
- Variable.CurrPtr = GetNextVariablePtr (Variable.CurrPtr);\r
- }\r
-\r
- //\r
- // 0: Volatile, 1: HOB, 2: Non-Volatile.\r
- // The index and attributes mapping must be kept in this order as FindVariable\r
- // makes use of this mapping to implement search algorithm.\r
- //\r
- VariableStoreHeader[VariableStoreTypeVolatile] = (VARIABLE_STORE_HEADER *) (UINTN) mVariableModuleGlobal->VariableGlobal.VolatileVariableBase;\r
- VariableStoreHeader[VariableStoreTypeHob] = (VARIABLE_STORE_HEADER *) (UINTN) mVariableModuleGlobal->VariableGlobal.HobVariableBase;\r
- VariableStoreHeader[VariableStoreTypeNv] = mNvVariableCache;\r
-\r
- while (TRUE) {\r
- //\r
- // Switch from Volatile to HOB, to Non-Volatile.\r
- //\r
- while (!IsValidVariableHeader (Variable.CurrPtr, Variable.EndPtr)) {\r
- //\r
- // Find current storage index\r
- //\r
- for (Type = (VARIABLE_STORE_TYPE) 0; Type < VariableStoreTypeMax; Type++) {\r
- if ((VariableStoreHeader[Type] != NULL) && (Variable.StartPtr == GetStartPointer (VariableStoreHeader[Type]))) {\r
- break;\r
- }\r
- }\r
- ASSERT (Type < VariableStoreTypeMax);\r
- //\r
- // Switch to next storage\r
- //\r
- for (Type++; Type < VariableStoreTypeMax; Type++) {\r
- if (VariableStoreHeader[Type] != NULL) {\r
- break;\r
- }\r
- }\r
- //\r
- // Capture the case that\r
- // 1. current storage is the last one, or\r
- // 2. no further storage\r
- //\r
- if (Type == VariableStoreTypeMax) {\r
- Status = EFI_NOT_FOUND;\r
- goto Done;\r
- }\r
- Variable.StartPtr = GetStartPointer (VariableStoreHeader[Type]);\r
- Variable.EndPtr = GetEndPointer (VariableStoreHeader[Type]);\r
- Variable.CurrPtr = Variable.StartPtr;\r
- }\r
-\r
- //\r
- // Variable is found\r
- //\r
- if (Variable.CurrPtr->State == VAR_ADDED || Variable.CurrPtr->State == (VAR_IN_DELETED_TRANSITION & VAR_ADDED)) {\r
- if (!AtRuntime () || ((Variable.CurrPtr->Attributes & EFI_VARIABLE_RUNTIME_ACCESS) != 0)) {\r
- if (Variable.CurrPtr->State == (VAR_IN_DELETED_TRANSITION & VAR_ADDED)) {\r
- //\r
- // If it is a IN_DELETED_TRANSITION variable,\r
- // and there is also a same ADDED one at the same time,\r
- // don't return it.\r
- //\r
- VariablePtrTrack.StartPtr = Variable.StartPtr;\r
- VariablePtrTrack.EndPtr = Variable.EndPtr;\r
- Status = FindVariableEx (\r
- GetVariableNamePtr (Variable.CurrPtr),\r
- &Variable.CurrPtr->VendorGuid,\r
- FALSE,\r
- &VariablePtrTrack\r
- );\r
- if (!EFI_ERROR (Status) && VariablePtrTrack.CurrPtr->State == VAR_ADDED) {\r
- Variable.CurrPtr = GetNextVariablePtr (Variable.CurrPtr);\r
- continue;\r
- }\r
- }\r
-\r
- //\r
- // Don't return NV variable when HOB overrides it\r
- //\r
- if ((VariableStoreHeader[VariableStoreTypeHob] != NULL) && (VariableStoreHeader[VariableStoreTypeNv] != NULL) &&\r
- (Variable.StartPtr == GetStartPointer (VariableStoreHeader[VariableStoreTypeNv]))\r
- ) {\r
- VariableInHob.StartPtr = GetStartPointer (VariableStoreHeader[VariableStoreTypeHob]);\r
- VariableInHob.EndPtr = GetEndPointer (VariableStoreHeader[VariableStoreTypeHob]);\r
- Status = FindVariableEx (\r
- GetVariableNamePtr (Variable.CurrPtr),\r
- &Variable.CurrPtr->VendorGuid,\r
- FALSE,\r
- &VariableInHob\r
- );\r
- if (!EFI_ERROR (Status)) {\r
- Variable.CurrPtr = GetNextVariablePtr (Variable.CurrPtr);\r
- continue;\r
- }\r
- }\r
-\r
- VarNameSize = NameSizeOfVariable (Variable.CurrPtr);\r
- ASSERT (VarNameSize != 0);\r
-\r
- if (VarNameSize <= *VariableNameSize) {\r
- CopyMem (VariableName, GetVariableNamePtr (Variable.CurrPtr), VarNameSize);\r
- CopyMem (VendorGuid, &Variable.CurrPtr->VendorGuid, sizeof (EFI_GUID));\r
- Status = EFI_SUCCESS;\r
- } else {\r
- Status = EFI_BUFFER_TOO_SMALL;\r
- }\r
-\r
- *VariableNameSize = VarNameSize;\r
- goto Done;\r
- }\r
- }\r
-\r
- Variable.CurrPtr = GetNextVariablePtr (Variable.CurrPtr);\r
- }\r
-\r
-Done:\r
- ReleaseLockOnlyAtBootTime (&mVariableModuleGlobal->VariableGlobal.VariableServicesLock);\r
- return Status;\r
-}\r
-\r
-/**\r
-\r
- This code sets variable in storage blocks (Volatile or Non-Volatile).\r
-\r
- Caution: This function may receive untrusted input.\r
- This function may be invoked in SMM mode, and datasize and data are external input.\r
- This function will do basic validation, before parse the data.\r
- This function will parse the authentication carefully to avoid security issues, like\r
- buffer overflow, integer overflow.\r
- This function will check attribute carefully to avoid authentication bypass.\r
-\r
- @param VariableName Name of Variable to be found.\r
- @param VendorGuid Variable vendor GUID.\r
- @param Attributes Attribute value of the variable found\r
- @param DataSize Size of Data found. If size is less than the\r
- data, this value contains the required size.\r
- @param Data Data pointer.\r
-\r
- @return EFI_INVALID_PARAMETER Invalid parameter.\r
- @return EFI_SUCCESS Set successfully.\r
- @return EFI_OUT_OF_RESOURCES Resource not enough to set variable.\r
- @return EFI_NOT_FOUND Not found.\r
- @return EFI_WRITE_PROTECTED Variable is read-only.\r
-\r
-**/\r
-EFI_STATUS\r
-EFIAPI\r
-VariableServiceSetVariable (\r
- IN CHAR16 *VariableName,\r
- IN EFI_GUID *VendorGuid,\r
- IN UINT32 Attributes,\r
- IN UINTN DataSize,\r
- IN VOID *Data\r
- )\r
-{\r
- VARIABLE_POINTER_TRACK Variable;\r
- EFI_STATUS Status;\r
- VARIABLE_HEADER *NextVariable;\r
- EFI_PHYSICAL_ADDRESS Point;\r
- UINTN PayloadSize;\r
- LIST_ENTRY *Link;\r
- VARIABLE_ENTRY *Entry;\r
- CHAR16 *Name;\r
-\r
- //\r
- // Check input parameters.\r
- //\r
- if (VariableName == NULL || VariableName[0] == 0 || VendorGuid == NULL) {\r
- return EFI_INVALID_PARAMETER;\r
- }\r
-\r
- if (DataSize != 0 && Data == NULL) {\r
- return EFI_INVALID_PARAMETER;\r
- }\r
-\r
- //\r
- // Check for reserverd bit in variable attribute.\r
- //\r
- if ((Attributes & (~EFI_VARIABLE_ATTRIBUTES_MASK)) != 0) {\r
- return EFI_INVALID_PARAMETER;\r
- }\r
-\r
- //\r
- // Make sure if runtime bit is set, boot service bit is set also.\r
- //\r
- if ((Attributes & (EFI_VARIABLE_RUNTIME_ACCESS | EFI_VARIABLE_BOOTSERVICE_ACCESS)) == EFI_VARIABLE_RUNTIME_ACCESS) {\r
- return EFI_INVALID_PARAMETER;\r
- }\r
-\r
- //\r
- // EFI_VARIABLE_AUTHENTICATED_WRITE_ACCESS and EFI_VARIABLE_TIME_BASED_AUTHENTICATED_WRITE_ACCESS attribute\r
- // cannot be set both.\r
- //\r
- if (((Attributes & EFI_VARIABLE_AUTHENTICATED_WRITE_ACCESS) == EFI_VARIABLE_AUTHENTICATED_WRITE_ACCESS)\r
- && ((Attributes & EFI_VARIABLE_TIME_BASED_AUTHENTICATED_WRITE_ACCESS) == EFI_VARIABLE_TIME_BASED_AUTHENTICATED_WRITE_ACCESS)) {\r
- return EFI_INVALID_PARAMETER;\r
- }\r
-\r
- if ((Attributes & EFI_VARIABLE_AUTHENTICATED_WRITE_ACCESS) == EFI_VARIABLE_AUTHENTICATED_WRITE_ACCESS) {\r
- if (DataSize < AUTHINFO_SIZE) {\r
- //\r
- // Try to write Authenticated Variable without AuthInfo.\r
- //\r
- return EFI_SECURITY_VIOLATION;\r
- }\r
- PayloadSize = DataSize - AUTHINFO_SIZE;\r
- } else if ((Attributes & EFI_VARIABLE_TIME_BASED_AUTHENTICATED_WRITE_ACCESS) == EFI_VARIABLE_TIME_BASED_AUTHENTICATED_WRITE_ACCESS) {\r
- //\r
- // Sanity check for EFI_VARIABLE_AUTHENTICATION_2 descriptor.\r
- //\r
- if (DataSize < OFFSET_OF_AUTHINFO2_CERT_DATA ||\r
- ((EFI_VARIABLE_AUTHENTICATION_2 *) Data)->AuthInfo.Hdr.dwLength > DataSize - (OFFSET_OF (EFI_VARIABLE_AUTHENTICATION_2, AuthInfo)) ||\r
- ((EFI_VARIABLE_AUTHENTICATION_2 *) Data)->AuthInfo.Hdr.dwLength < OFFSET_OF (WIN_CERTIFICATE_UEFI_GUID, CertData)) {\r
- return EFI_SECURITY_VIOLATION;\r
- }\r
- PayloadSize = DataSize - AUTHINFO2_SIZE (Data);\r
- } else {\r
- PayloadSize = DataSize;\r
- }\r
-\r
- if ((UINTN)(~0) - PayloadSize < StrSize(VariableName)){\r
- //\r
- // Prevent whole variable size overflow\r
- //\r
- return EFI_INVALID_PARAMETER;\r
- }\r
-\r
- //\r
- // The size of the VariableName, including the Unicode Null in bytes plus\r
- // the DataSize is limited to maximum size of PcdGet32 (PcdMaxHardwareErrorVariableSize)\r
- // bytes for HwErrRec.\r
- //\r
- if ((Attributes & EFI_VARIABLE_HARDWARE_ERROR_RECORD) == EFI_VARIABLE_HARDWARE_ERROR_RECORD) {\r
- if (StrSize (VariableName) + PayloadSize > PcdGet32 (PcdMaxHardwareErrorVariableSize) - sizeof (VARIABLE_HEADER)) {\r
- return EFI_INVALID_PARAMETER;\r
- }\r
- if (!IsHwErrRecVariable(VariableName, VendorGuid)) {\r
- return EFI_INVALID_PARAMETER;\r
- }\r
- } else {\r
- //\r
- // The size of the VariableName, including the Unicode Null in bytes plus\r
- // the DataSize is limited to maximum size of Max(Auth)VariableSize bytes.\r
- //\r
- if ((Attributes & VARIABLE_ATTRIBUTE_AT_AW) != 0) {\r
- if (StrSize (VariableName) + PayloadSize > mVariableModuleGlobal->MaxAuthVariableSize - sizeof (VARIABLE_HEADER)) {\r
- return EFI_INVALID_PARAMETER;\r
- }\r
- } else {\r
- if (StrSize (VariableName) + PayloadSize > mVariableModuleGlobal->MaxVariableSize - sizeof (VARIABLE_HEADER)) {\r
- return EFI_INVALID_PARAMETER;\r
- }\r
- }\r
- }\r
-\r
- AcquireLockOnlyAtBootTime(&mVariableModuleGlobal->VariableGlobal.VariableServicesLock);\r
-\r
- //\r
- // Consider reentrant in MCA/INIT/NMI. It needs be reupdated.\r
- //\r
- if (1 < InterlockedIncrement (&mVariableModuleGlobal->VariableGlobal.ReentrantState)) {\r
- Point = mVariableModuleGlobal->VariableGlobal.NonVolatileVariableBase;\r
- //\r
- // Parse non-volatile variable data and get last variable offset.\r
- //\r
- NextVariable = GetStartPointer ((VARIABLE_STORE_HEADER *) (UINTN) Point);\r
- while (IsValidVariableHeader (NextVariable, GetEndPointer ((VARIABLE_STORE_HEADER *) (UINTN) Point))) {\r
- NextVariable = GetNextVariablePtr (NextVariable);\r
- }\r
- mVariableModuleGlobal->NonVolatileLastVariableOffset = (UINTN) NextVariable - (UINTN) Point;\r
- }\r
-\r
- if (mEndOfDxe && mEnableLocking) {\r
- //\r
- // Treat the variables listed in the forbidden variable list as read-only after leaving DXE phase.\r
- //\r
- for ( Link = GetFirstNode (&mLockedVariableList)\r
- ; !IsNull (&mLockedVariableList, Link)\r
- ; Link = GetNextNode (&mLockedVariableList, Link)\r
- ) {\r
- Entry = BASE_CR (Link, VARIABLE_ENTRY, Link);\r
- Name = (CHAR16 *) ((UINTN) Entry + sizeof (*Entry));\r
- if (CompareGuid (&Entry->Guid, VendorGuid) && (StrCmp (Name, VariableName) == 0)) {\r
- Status = EFI_WRITE_PROTECTED;\r
- DEBUG ((EFI_D_INFO, "[Variable]: Changing readonly variable after leaving DXE phase - %g:%s\n", VendorGuid, VariableName));\r
- goto Done;\r
- }\r
- }\r
- }\r
-\r
- Status = InternalVarCheckSetVariableCheck (VariableName, VendorGuid, Attributes, PayloadSize, (VOID *) ((UINTN) Data + DataSize - PayloadSize));\r
- if (EFI_ERROR (Status)) {\r
- goto Done;\r
- }\r
-\r
- //\r
- // Check whether the input variable is already existed.\r
- //\r
- Status = FindVariable (VariableName, VendorGuid, &Variable, &mVariableModuleGlobal->VariableGlobal, TRUE);\r
- if (!EFI_ERROR (Status)) {\r
- if (((Variable.CurrPtr->Attributes & EFI_VARIABLE_RUNTIME_ACCESS) == 0) && AtRuntime ()) {\r
- Status = EFI_WRITE_PROTECTED;\r
- goto Done;\r
- }\r
- if (Attributes != 0 && (Attributes & (~EFI_VARIABLE_APPEND_WRITE)) != Variable.CurrPtr->Attributes) {\r
- //\r
- // If a preexisting variable is rewritten with different attributes, SetVariable() shall not\r
- // modify the variable and shall return EFI_INVALID_PARAMETER. Two exceptions to this rule:\r
- // 1. No access attributes specified\r
- // 2. The only attribute differing is EFI_VARIABLE_APPEND_WRITE\r
- //\r
- Status = EFI_INVALID_PARAMETER;\r
- DEBUG ((EFI_D_INFO, "[Variable]: Rewritten a preexisting variable(0x%08x) with different attributes(0x%08x) - %g:%s\n", Variable.CurrPtr->Attributes, Attributes, VendorGuid, VariableName));\r
- goto Done;\r
- }\r
- }\r
-\r
- if (!FeaturePcdGet (PcdUefiVariableDefaultLangDeprecate)) {\r
- //\r
- // Hook the operation of setting PlatformLangCodes/PlatformLang and LangCodes/Lang.\r
- //\r
- Status = AutoUpdateLangVariable (VariableName, Data, DataSize);\r
- if (EFI_ERROR (Status)) {\r
- //\r
- // The auto update operation failed, directly return to avoid inconsistency between PlatformLang and Lang.\r
- //\r
- goto Done;\r
- }\r
- }\r
-\r
- //\r
- // Process PK, KEK, Sigdb seperately.\r
- //\r
- if (CompareGuid (VendorGuid, &gEfiGlobalVariableGuid) && (StrCmp (VariableName, EFI_PLATFORM_KEY_NAME) == 0)){\r
- Status = ProcessVarWithPk (VariableName, VendorGuid, Data, DataSize, &Variable, Attributes, TRUE);\r
- } else if (CompareGuid (VendorGuid, &gEfiGlobalVariableGuid) && (StrCmp (VariableName, EFI_KEY_EXCHANGE_KEY_NAME) == 0)) {\r
- Status = ProcessVarWithPk (VariableName, VendorGuid, Data, DataSize, &Variable, Attributes, FALSE);\r
- } else if (CompareGuid (VendorGuid, &gEfiImageSecurityDatabaseGuid) &&\r
- ((StrCmp (VariableName, EFI_IMAGE_SECURITY_DATABASE) == 0) ||\r
- (StrCmp (VariableName, EFI_IMAGE_SECURITY_DATABASE1) == 0) ||\r
- (StrCmp (VariableName, EFI_IMAGE_SECURITY_DATABASE2) == 0)\r
- )\r
- ) {\r
- Status = ProcessVarWithPk (VariableName, VendorGuid, Data, DataSize, &Variable, Attributes, FALSE);\r
- if (EFI_ERROR (Status)) {\r
- Status = ProcessVarWithKek (VariableName, VendorGuid, Data, DataSize, &Variable, Attributes);\r
- }\r
- } else {\r
- Status = ProcessVariable (VariableName, VendorGuid, Data, DataSize, &Variable, Attributes);\r
- }\r
-\r
-Done:\r
- InterlockedDecrement (&mVariableModuleGlobal->VariableGlobal.ReentrantState);\r
- ReleaseLockOnlyAtBootTime (&mVariableModuleGlobal->VariableGlobal.VariableServicesLock);\r
-\r
- if (!AtRuntime ()) {\r
- if (!EFI_ERROR (Status)) {\r
- SecureBootHook (\r
- VariableName,\r
- VendorGuid\r
- );\r
- }\r
- }\r
-\r
- return Status;\r
-}\r
-\r
-/**\r
-\r
- This code returns information about the EFI variables.\r
-\r
- Caution: This function may receive untrusted input.\r
- This function may be invoked in SMM mode. This function will do basic validation, before parse the data.\r
-\r
- @param Attributes Attributes bitmask to specify the type of variables\r
- on which to return information.\r
- @param MaximumVariableStorageSize Pointer to the maximum size of the storage space available\r
- for the EFI variables associated with the attributes specified.\r
- @param RemainingVariableStorageSize Pointer to the remaining size of the storage space available\r
- for EFI variables associated with the attributes specified.\r
- @param MaximumVariableSize Pointer to the maximum size of an individual EFI variables\r
- associated with the attributes specified.\r
-\r
- @return EFI_SUCCESS Query successfully.\r
-\r
-**/\r
-EFI_STATUS\r
-EFIAPI\r
-VariableServiceQueryVariableInfoInternal (\r
- IN UINT32 Attributes,\r
- OUT UINT64 *MaximumVariableStorageSize,\r
- OUT UINT64 *RemainingVariableStorageSize,\r
- OUT UINT64 *MaximumVariableSize\r
- )\r
-{\r
- VARIABLE_HEADER *Variable;\r
- VARIABLE_HEADER *NextVariable;\r
- UINT64 VariableSize;\r
- VARIABLE_STORE_HEADER *VariableStoreHeader;\r
- UINT64 CommonVariableTotalSize;\r
- UINT64 HwErrVariableTotalSize;\r
- EFI_STATUS Status;\r
- VARIABLE_POINTER_TRACK VariablePtrTrack;\r
-\r
- CommonVariableTotalSize = 0;\r
- HwErrVariableTotalSize = 0;\r
-\r
- if((Attributes & EFI_VARIABLE_NON_VOLATILE) == 0) {\r
- //\r
- // Query is Volatile related.\r
- //\r
- VariableStoreHeader = (VARIABLE_STORE_HEADER *) ((UINTN) mVariableModuleGlobal->VariableGlobal.VolatileVariableBase);\r
- } else {\r
- //\r
- // Query is Non-Volatile related.\r
- //\r
- VariableStoreHeader = mNvVariableCache;\r
- }\r
-\r
- //\r
- // Now let's fill *MaximumVariableStorageSize *RemainingVariableStorageSize\r
- // with the storage size (excluding the storage header size).\r
- //\r
- *MaximumVariableStorageSize = VariableStoreHeader->Size - sizeof (VARIABLE_STORE_HEADER);\r
-\r
- //\r
- // Harware error record variable needs larger size.\r
- //\r
- if ((Attributes & (EFI_VARIABLE_NON_VOLATILE | EFI_VARIABLE_HARDWARE_ERROR_RECORD)) == (EFI_VARIABLE_NON_VOLATILE | EFI_VARIABLE_HARDWARE_ERROR_RECORD)) {\r
- *MaximumVariableStorageSize = PcdGet32 (PcdHwErrStorageSize);\r
- *MaximumVariableSize = PcdGet32 (PcdMaxHardwareErrorVariableSize) - sizeof (VARIABLE_HEADER);\r
- } else {\r
- if ((Attributes & EFI_VARIABLE_NON_VOLATILE) != 0) {\r
- if (AtRuntime ()) {\r
- *MaximumVariableStorageSize = mVariableModuleGlobal->CommonRuntimeVariableSpace;\r
- } else {\r
- *MaximumVariableStorageSize = mVariableModuleGlobal->CommonVariableSpace;\r
- }\r
- }\r
-\r
- //\r
- // Let *MaximumVariableSize be Max(Auth)VariableSize with the exception of the variable header size.\r
- //\r
- if ((Attributes & VARIABLE_ATTRIBUTE_AT_AW) != 0) {\r
- *MaximumVariableSize = mVariableModuleGlobal->MaxAuthVariableSize - sizeof (VARIABLE_HEADER);\r
- } else {\r
- *MaximumVariableSize = mVariableModuleGlobal->MaxVariableSize - sizeof (VARIABLE_HEADER);\r
- }\r
- }\r
-\r
- //\r
- // Point to the starting address of the variables.\r
- //\r
- Variable = GetStartPointer (VariableStoreHeader);\r
-\r
- //\r
- // Now walk through the related variable store.\r
- //\r
- while (IsValidVariableHeader (Variable, GetEndPointer (VariableStoreHeader))) {\r
- NextVariable = GetNextVariablePtr (Variable);\r
- VariableSize = (UINT64) (UINTN) NextVariable - (UINT64) (UINTN) Variable;\r
-\r
- if (AtRuntime ()) {\r
- //\r
- // We don't take the state of the variables in mind\r
- // when calculating RemainingVariableStorageSize,\r
- // since the space occupied by variables not marked with\r
- // VAR_ADDED is not allowed to be reclaimed in Runtime.\r
- //\r
- if ((Variable->Attributes & EFI_VARIABLE_HARDWARE_ERROR_RECORD) == EFI_VARIABLE_HARDWARE_ERROR_RECORD) {\r
- HwErrVariableTotalSize += VariableSize;\r
- } else {\r
- CommonVariableTotalSize += VariableSize;\r
- }\r
- } else {\r
- //\r
- // Only care about Variables with State VAR_ADDED, because\r
- // the space not marked as VAR_ADDED is reclaimable now.\r
- //\r
- if (Variable->State == VAR_ADDED) {\r
- if ((Variable->Attributes & EFI_VARIABLE_HARDWARE_ERROR_RECORD) == EFI_VARIABLE_HARDWARE_ERROR_RECORD) {\r
- HwErrVariableTotalSize += VariableSize;\r
- } else {\r
- CommonVariableTotalSize += VariableSize;\r
- }\r
- } else if (Variable->State == (VAR_IN_DELETED_TRANSITION & VAR_ADDED)) {\r
- //\r
- // If it is a IN_DELETED_TRANSITION variable,\r
- // and there is not also a same ADDED one at the same time,\r
- // this IN_DELETED_TRANSITION variable is valid.\r
- //\r
- VariablePtrTrack.StartPtr = GetStartPointer (VariableStoreHeader);\r
- VariablePtrTrack.EndPtr = GetEndPointer (VariableStoreHeader);\r
- Status = FindVariableEx (\r
- GetVariableNamePtr (Variable),\r
- &Variable->VendorGuid,\r
- FALSE,\r
- &VariablePtrTrack\r
- );\r
- if (!EFI_ERROR (Status) && VariablePtrTrack.CurrPtr->State != VAR_ADDED) {\r
- if ((Variable->Attributes & EFI_VARIABLE_HARDWARE_ERROR_RECORD) == EFI_VARIABLE_HARDWARE_ERROR_RECORD) {\r
- HwErrVariableTotalSize += VariableSize;\r
- } else {\r
- CommonVariableTotalSize += VariableSize;\r
- }\r
- }\r
- }\r
- }\r
-\r
- //\r
- // Go to the next one.\r
- //\r
- Variable = NextVariable;\r
- }\r
-\r
- if ((Attributes & EFI_VARIABLE_HARDWARE_ERROR_RECORD) == EFI_VARIABLE_HARDWARE_ERROR_RECORD){\r
- *RemainingVariableStorageSize = *MaximumVariableStorageSize - HwErrVariableTotalSize;\r
- } else {\r
- if (*MaximumVariableStorageSize < CommonVariableTotalSize) {\r
- *RemainingVariableStorageSize = 0;\r
- } else {\r
- *RemainingVariableStorageSize = *MaximumVariableStorageSize - CommonVariableTotalSize;\r
- }\r
- }\r
-\r
- if (*RemainingVariableStorageSize < sizeof (VARIABLE_HEADER)) {\r
- *MaximumVariableSize = 0;\r
- } else if ((*RemainingVariableStorageSize - sizeof (VARIABLE_HEADER)) < *MaximumVariableSize) {\r
- *MaximumVariableSize = *RemainingVariableStorageSize - sizeof (VARIABLE_HEADER);\r
- }\r
-\r
- return EFI_SUCCESS;\r
-}\r
-\r
-/**\r
-\r
- This code returns information about the EFI variables.\r
-\r
- Caution: This function may receive untrusted input.\r
- This function may be invoked in SMM mode. This function will do basic validation, before parse the data.\r
-\r
- @param Attributes Attributes bitmask to specify the type of variables\r
- on which to return information.\r
- @param MaximumVariableStorageSize Pointer to the maximum size of the storage space available\r
- for the EFI variables associated with the attributes specified.\r
- @param RemainingVariableStorageSize Pointer to the remaining size of the storage space available\r
- for EFI variables associated with the attributes specified.\r
- @param MaximumVariableSize Pointer to the maximum size of an individual EFI variables\r
- associated with the attributes specified.\r
-\r
- @return EFI_INVALID_PARAMETER An invalid combination of attribute bits was supplied.\r
- @return EFI_SUCCESS Query successfully.\r
- @return EFI_UNSUPPORTED The attribute is not supported on this platform.\r
-\r
-**/\r
-EFI_STATUS\r
-EFIAPI\r
-VariableServiceQueryVariableInfo (\r
- IN UINT32 Attributes,\r
- OUT UINT64 *MaximumVariableStorageSize,\r
- OUT UINT64 *RemainingVariableStorageSize,\r
- OUT UINT64 *MaximumVariableSize\r
- )\r
-{\r
- EFI_STATUS Status;\r
-\r
- if(MaximumVariableStorageSize == NULL || RemainingVariableStorageSize == NULL || MaximumVariableSize == NULL || Attributes == 0) {\r
- return EFI_INVALID_PARAMETER;\r
- }\r
-\r
- if ((Attributes & VARIABLE_ATTRIBUTE_NV_BS_RT_AT_HR_AW) == 0) {\r
- //\r
- // Make sure the Attributes combination is supported by the platform.\r
- //\r
- return EFI_UNSUPPORTED;\r
- } else if ((Attributes & (EFI_VARIABLE_RUNTIME_ACCESS | EFI_VARIABLE_BOOTSERVICE_ACCESS)) == EFI_VARIABLE_RUNTIME_ACCESS) {\r
- //\r
- // Make sure if runtime bit is set, boot service bit is set also.\r
- //\r
- return EFI_INVALID_PARAMETER;\r
- } else if (AtRuntime () && ((Attributes & EFI_VARIABLE_RUNTIME_ACCESS) == 0)) {\r
- //\r
- // Make sure RT Attribute is set if we are in Runtime phase.\r
- //\r
- return EFI_INVALID_PARAMETER;\r
- } else if ((Attributes & (EFI_VARIABLE_NON_VOLATILE | EFI_VARIABLE_HARDWARE_ERROR_RECORD)) == EFI_VARIABLE_HARDWARE_ERROR_RECORD) {\r
- //\r
- // Make sure Hw Attribute is set with NV.\r
- //\r
- return EFI_INVALID_PARAMETER;\r
- }\r
-\r
- AcquireLockOnlyAtBootTime(&mVariableModuleGlobal->VariableGlobal.VariableServicesLock);\r
-\r
- Status = VariableServiceQueryVariableInfoInternal (\r
- Attributes,\r
- MaximumVariableStorageSize,\r
- RemainingVariableStorageSize,\r
- MaximumVariableSize\r
- );\r
-\r
- ReleaseLockOnlyAtBootTime (&mVariableModuleGlobal->VariableGlobal.VariableServicesLock);\r
- return Status;\r
-}\r
-\r
-/**\r
- This function reclaims variable storage if free size is below the threshold.\r
-\r
- Caution: This function may be invoked at SMM mode.\r
- Care must be taken to make sure not security issue.\r
-\r
-**/\r
-VOID\r
-ReclaimForOS(\r
- VOID\r
- )\r
-{\r
- EFI_STATUS Status;\r
- UINTN RemainingCommonRuntimeVariableSpace;\r
- UINTN RemainingHwErrVariableSpace;\r
- STATIC BOOLEAN Reclaimed;\r
-\r
- //\r
- // This function will be called only once at EndOfDxe or ReadyToBoot event.\r
- //\r
- if (Reclaimed) {\r
- return;\r
- }\r
- Reclaimed = TRUE;\r
-\r
- Status = EFI_SUCCESS;\r
-\r
- if (mVariableModuleGlobal->CommonRuntimeVariableSpace < mVariableModuleGlobal->CommonVariableTotalSize) {\r
- RemainingCommonRuntimeVariableSpace = 0;\r
- } else {\r
- RemainingCommonRuntimeVariableSpace = mVariableModuleGlobal->CommonRuntimeVariableSpace - mVariableModuleGlobal->CommonVariableTotalSize;\r
- }\r
-\r
- RemainingHwErrVariableSpace = PcdGet32 (PcdHwErrStorageSize) - mVariableModuleGlobal->HwErrVariableTotalSize;\r
-\r
- //\r
- // Check if the free area is below a threshold.\r
- //\r
- if (((RemainingCommonRuntimeVariableSpace < mVariableModuleGlobal->MaxVariableSize) ||\r
- (RemainingCommonRuntimeVariableSpace < mVariableModuleGlobal->MaxAuthVariableSize)) ||\r
- ((PcdGet32 (PcdHwErrStorageSize) != 0) &&\r
- (RemainingHwErrVariableSpace < PcdGet32 (PcdMaxHardwareErrorVariableSize)))){\r
- Status = Reclaim (\r
- mVariableModuleGlobal->VariableGlobal.NonVolatileVariableBase,\r
- &mVariableModuleGlobal->NonVolatileLastVariableOffset,\r
- FALSE,\r
- NULL,\r
- NULL,\r
- 0,\r
- FALSE\r
- );\r
- ASSERT_EFI_ERROR (Status);\r
- }\r
-}\r
-\r
-/**\r
- Init non-volatile variable store.\r
-\r
- @retval EFI_SUCCESS Function successfully executed.\r
- @retval EFI_OUT_OF_RESOURCES Fail to allocate enough memory resource.\r
- @retval EFI_VOLUME_CORRUPTED Variable Store or Firmware Volume for Variable Store is corrupted.\r
-\r
-**/\r
-EFI_STATUS\r
-InitNonVolatileVariableStore (\r
- VOID\r
- )\r
-{\r
- EFI_FIRMWARE_VOLUME_HEADER *FvHeader;\r
- VARIABLE_HEADER *Variable;\r
- VARIABLE_HEADER *NextVariable;\r
- EFI_PHYSICAL_ADDRESS VariableStoreBase;\r
- UINT64 VariableStoreLength;\r
- UINTN VariableSize;\r
- EFI_HOB_GUID_TYPE *GuidHob;\r
- EFI_PHYSICAL_ADDRESS NvStorageBase;\r
- UINT8 *NvStorageData;\r
- UINT32 NvStorageSize;\r
- FAULT_TOLERANT_WRITE_LAST_WRITE_DATA *FtwLastWriteData;\r
- UINT32 BackUpOffset;\r
- UINT32 BackUpSize;\r
- UINT32 HwErrStorageSize;\r
- UINT32 MaxUserNvVariableSpaceSize;\r
- UINT32 BoottimeReservedNvVariableSpaceSize;\r
-\r
- mVariableModuleGlobal->FvbInstance = NULL;\r
-\r
- //\r
- // Allocate runtime memory used for a memory copy of the FLASH region.\r
- // Keep the memory and the FLASH in sync as updates occur.\r
- //\r
- NvStorageSize = PcdGet32 (PcdFlashNvStorageVariableSize);\r
- NvStorageData = AllocateRuntimeZeroPool (NvStorageSize);\r
- if (NvStorageData == NULL) {\r
- return EFI_OUT_OF_RESOURCES;\r
- }\r
-\r
- NvStorageBase = (EFI_PHYSICAL_ADDRESS) PcdGet64 (PcdFlashNvStorageVariableBase64);\r
- if (NvStorageBase == 0) {\r
- NvStorageBase = (EFI_PHYSICAL_ADDRESS) PcdGet32 (PcdFlashNvStorageVariableBase);\r
- }\r
- //\r
- // Copy NV storage data to the memory buffer.\r
- //\r
- CopyMem (NvStorageData, (UINT8 *) (UINTN) NvStorageBase, NvStorageSize);\r
-\r
- //\r
- // Check the FTW last write data hob.\r
- //\r
- GuidHob = GetFirstGuidHob (&gEdkiiFaultTolerantWriteGuid);\r
- if (GuidHob != NULL) {\r
- FtwLastWriteData = (FAULT_TOLERANT_WRITE_LAST_WRITE_DATA *) GET_GUID_HOB_DATA (GuidHob);\r
- if (FtwLastWriteData->TargetAddress == NvStorageBase) {\r
- DEBUG ((EFI_D_INFO, "Variable: NV storage is backed up in spare block: 0x%x\n", (UINTN) FtwLastWriteData->SpareAddress));\r
- //\r
- // Copy the backed up NV storage data to the memory buffer from spare block.\r
- //\r
- CopyMem (NvStorageData, (UINT8 *) (UINTN) (FtwLastWriteData->SpareAddress), NvStorageSize);\r
- } else if ((FtwLastWriteData->TargetAddress > NvStorageBase) &&\r
- (FtwLastWriteData->TargetAddress < (NvStorageBase + NvStorageSize))) {\r
- //\r
- // Flash NV storage from the Offset is backed up in spare block.\r
- //\r
- BackUpOffset = (UINT32) (FtwLastWriteData->TargetAddress - NvStorageBase);\r
- BackUpSize = NvStorageSize - BackUpOffset;\r
- DEBUG ((EFI_D_INFO, "Variable: High partial NV storage from offset: %x is backed up in spare block: 0x%x\n", BackUpOffset, (UINTN) FtwLastWriteData->SpareAddress));\r
- //\r
- // Copy the partial backed up NV storage data to the memory buffer from spare block.\r
- //\r
- CopyMem (NvStorageData + BackUpOffset, (UINT8 *) (UINTN) FtwLastWriteData->SpareAddress, BackUpSize);\r
- }\r
- }\r
-\r
- FvHeader = (EFI_FIRMWARE_VOLUME_HEADER *) NvStorageData;\r
-\r
- //\r
- // Check if the Firmware Volume is not corrupted\r
- //\r
- if ((FvHeader->Signature != EFI_FVH_SIGNATURE) || (!CompareGuid (&gEfiSystemNvDataFvGuid, &FvHeader->FileSystemGuid))) {\r
- FreePool (NvStorageData);\r
- DEBUG ((EFI_D_ERROR, "Firmware Volume for Variable Store is corrupted\n"));\r
- return EFI_VOLUME_CORRUPTED;\r
- }\r
-\r
- VariableStoreBase = (EFI_PHYSICAL_ADDRESS) ((UINTN) FvHeader + FvHeader->HeaderLength);\r
- VariableStoreLength = (UINT64) (NvStorageSize - FvHeader->HeaderLength);\r
-\r
- mVariableModuleGlobal->VariableGlobal.NonVolatileVariableBase = VariableStoreBase;\r
- mNvVariableCache = (VARIABLE_STORE_HEADER *) (UINTN) VariableStoreBase;\r
- if (GetVariableStoreStatus (mNvVariableCache) != EfiValid) {\r
- FreePool (NvStorageData);\r
- DEBUG((EFI_D_ERROR, "Variable Store header is corrupted\n"));\r
- return EFI_VOLUME_CORRUPTED;\r
- }\r
- ASSERT(mNvVariableCache->Size == VariableStoreLength);\r
-\r
-\r
- ASSERT (sizeof (VARIABLE_STORE_HEADER) <= VariableStoreLength);\r
-\r
- HwErrStorageSize = PcdGet32 (PcdHwErrStorageSize);\r
- MaxUserNvVariableSpaceSize = PcdGet32 (PcdMaxUserNvVariableSpaceSize);\r
- BoottimeReservedNvVariableSpaceSize = PcdGet32 (PcdBoottimeReservedNvVariableSpaceSize);\r
-\r
- //\r
- // Note that in EdkII variable driver implementation, Hardware Error Record type variable\r
- // is stored with common variable in the same NV region. So the platform integrator should\r
- // ensure that the value of PcdHwErrStorageSize is less than the value of\r
- // (VariableStoreLength - sizeof (VARIABLE_STORE_HEADER)).\r
- //\r
- ASSERT (HwErrStorageSize < (VariableStoreLength - sizeof (VARIABLE_STORE_HEADER)));\r
- //\r
- // Ensure that the value of PcdMaxUserNvVariableSpaceSize is less than the value of\r
- // (VariableStoreLength - sizeof (VARIABLE_STORE_HEADER)) - PcdGet32 (PcdHwErrStorageSize).\r
- //\r
- ASSERT (MaxUserNvVariableSpaceSize < (VariableStoreLength - sizeof (VARIABLE_STORE_HEADER) - HwErrStorageSize));\r
- //\r
- // Ensure that the value of PcdBoottimeReservedNvVariableSpaceSize is less than the value of\r
- // (VariableStoreLength - sizeof (VARIABLE_STORE_HEADER)) - PcdGet32 (PcdHwErrStorageSize).\r
- //\r
- ASSERT (BoottimeReservedNvVariableSpaceSize < (VariableStoreLength - sizeof (VARIABLE_STORE_HEADER) - HwErrStorageSize));\r
-\r
- mVariableModuleGlobal->CommonVariableSpace = ((UINTN) VariableStoreLength - sizeof (VARIABLE_STORE_HEADER) - HwErrStorageSize);\r
- mVariableModuleGlobal->CommonMaxUserVariableSpace = ((MaxUserNvVariableSpaceSize != 0) ? MaxUserNvVariableSpaceSize : mVariableModuleGlobal->CommonVariableSpace);\r
- mVariableModuleGlobal->CommonRuntimeVariableSpace = mVariableModuleGlobal->CommonVariableSpace - BoottimeReservedNvVariableSpaceSize;\r
-\r
- DEBUG ((EFI_D_INFO, "Variable driver common space: 0x%x 0x%x 0x%x\n", mVariableModuleGlobal->CommonVariableSpace, mVariableModuleGlobal->CommonMaxUserVariableSpace, mVariableModuleGlobal->CommonRuntimeVariableSpace));\r
-\r
- //\r
- // The max NV variable size should be < (VariableStoreLength - sizeof (VARIABLE_STORE_HEADER)).\r
- //\r
- ASSERT (MAX_NV_VARIABLE_SIZE < (VariableStoreLength - sizeof (VARIABLE_STORE_HEADER)));\r
-\r
- mVariableModuleGlobal->MaxVariableSize = PcdGet32 (PcdMaxVariableSize);\r
- mVariableModuleGlobal->MaxAuthVariableSize = ((PcdGet32 (PcdMaxAuthVariableSize) != 0) ? PcdGet32 (PcdMaxAuthVariableSize) : mVariableModuleGlobal->MaxVariableSize);\r
-\r
- //\r
- // Parse non-volatile variable data and get last variable offset.\r
- //\r
- Variable = GetStartPointer ((VARIABLE_STORE_HEADER *)(UINTN)VariableStoreBase);\r
- while (IsValidVariableHeader (Variable, GetEndPointer ((VARIABLE_STORE_HEADER *)(UINTN)VariableStoreBase))) {\r
- NextVariable = GetNextVariablePtr (Variable);\r
- VariableSize = (UINTN) NextVariable - (UINTN) Variable;\r
- if ((Variable->Attributes & (EFI_VARIABLE_NON_VOLATILE | EFI_VARIABLE_HARDWARE_ERROR_RECORD)) == (EFI_VARIABLE_NON_VOLATILE | EFI_VARIABLE_HARDWARE_ERROR_RECORD)) {\r
- mVariableModuleGlobal->HwErrVariableTotalSize += VariableSize;\r
- } else {\r
- mVariableModuleGlobal->CommonVariableTotalSize += VariableSize;\r
- }\r
-\r
- Variable = NextVariable;\r
- }\r
- mVariableModuleGlobal->NonVolatileLastVariableOffset = (UINTN) Variable - (UINTN) VariableStoreBase;\r
-\r
- return EFI_SUCCESS;\r
-}\r
-\r
-/**\r
- Flush the HOB variable to flash.\r
-\r
- @param[in] VariableName Name of variable has been updated or deleted.\r
- @param[in] VendorGuid Guid of variable has been updated or deleted.\r
-\r
-**/\r
-VOID\r
-FlushHobVariableToFlash (\r
- IN CHAR16 *VariableName,\r
- IN EFI_GUID *VendorGuid\r
- )\r
-{\r
- EFI_STATUS Status;\r
- VARIABLE_STORE_HEADER *VariableStoreHeader;\r
- VARIABLE_HEADER *Variable;\r
- VOID *VariableData;\r
- BOOLEAN ErrorFlag;\r
-\r
- ErrorFlag = FALSE;\r
-\r
- //\r
- // Flush the HOB variable to flash.\r
- //\r
- if (mVariableModuleGlobal->VariableGlobal.HobVariableBase != 0) {\r
- VariableStoreHeader = (VARIABLE_STORE_HEADER *) (UINTN) mVariableModuleGlobal->VariableGlobal.HobVariableBase;\r
- //\r
- // Set HobVariableBase to 0, it can avoid SetVariable to call back.\r
- //\r
- mVariableModuleGlobal->VariableGlobal.HobVariableBase = 0;\r
- for ( Variable = GetStartPointer (VariableStoreHeader)\r
- ; IsValidVariableHeader (Variable, GetEndPointer (VariableStoreHeader))\r
- ; Variable = GetNextVariablePtr (Variable)\r
- ) {\r
- if (Variable->State != VAR_ADDED) {\r
- //\r
- // The HOB variable has been set to DELETED state in local.\r
- //\r
- continue;\r
- }\r
- ASSERT ((Variable->Attributes & EFI_VARIABLE_NON_VOLATILE) != 0);\r
- if (VendorGuid == NULL || VariableName == NULL ||\r
- !CompareGuid (VendorGuid, &Variable->VendorGuid) ||\r
- StrCmp (VariableName, GetVariableNamePtr (Variable)) != 0) {\r
- VariableData = GetVariableDataPtr (Variable);\r
- Status = VariableServiceSetVariable (\r
- GetVariableNamePtr (Variable),\r
- &Variable->VendorGuid,\r
- Variable->Attributes,\r
- Variable->DataSize,\r
- VariableData\r
- );\r
- DEBUG ((EFI_D_INFO, "Variable driver flush the HOB variable to flash: %g %s %r\n", &Variable->VendorGuid, GetVariableNamePtr (Variable), Status));\r
- } else {\r
- //\r
- // The updated or deleted variable is matched with the HOB variable.\r
- // Don't break here because we will try to set other HOB variables\r
- // since this variable could be set successfully.\r
- //\r
- Status = EFI_SUCCESS;\r
- }\r
- if (!EFI_ERROR (Status)) {\r
- //\r
- // If set variable successful, or the updated or deleted variable is matched with the HOB variable,\r
- // set the HOB variable to DELETED state in local.\r
- //\r
- DEBUG ((EFI_D_INFO, "Variable driver set the HOB variable to DELETED state in local: %g %s\n", &Variable->VendorGuid, GetVariableNamePtr (Variable)));\r
- Variable->State &= VAR_DELETED;\r
- } else {\r
- ErrorFlag = TRUE;\r
- }\r
- }\r
- if (ErrorFlag) {\r
- //\r
- // We still have HOB variable(s) not flushed in flash.\r
- //\r
- mVariableModuleGlobal->VariableGlobal.HobVariableBase = (EFI_PHYSICAL_ADDRESS) (UINTN) VariableStoreHeader;\r
- } else {\r
- //\r
- // All HOB variables have been flushed in flash.\r
- //\r
- DEBUG ((EFI_D_INFO, "Variable driver: all HOB variables have been flushed in flash.\n"));\r
- if (!AtRuntime ()) {\r
- FreePool ((VOID *) VariableStoreHeader);\r
- }\r
- }\r
- }\r
-\r
-}\r
-\r
-/**\r
- Initializes variable write service after FTW was ready.\r
-\r
- @retval EFI_SUCCESS Function successfully executed.\r
- @retval Others Fail to initialize the variable service.\r
-\r
-**/\r
-EFI_STATUS\r
-VariableWriteServiceInitialize (\r
- VOID\r
- )\r
-{\r
- EFI_STATUS Status;\r
- VARIABLE_STORE_HEADER *VariableStoreHeader;\r
- UINTN Index;\r
- UINT8 Data;\r
- EFI_PHYSICAL_ADDRESS VariableStoreBase;\r
- EFI_PHYSICAL_ADDRESS NvStorageBase;\r
-\r
- NvStorageBase = (EFI_PHYSICAL_ADDRESS) PcdGet64 (PcdFlashNvStorageVariableBase64);\r
- if (NvStorageBase == 0) {\r
- NvStorageBase = (EFI_PHYSICAL_ADDRESS) PcdGet32 (PcdFlashNvStorageVariableBase);\r
- }\r
- VariableStoreBase = NvStorageBase + (((EFI_FIRMWARE_VOLUME_HEADER *)(UINTN)(NvStorageBase))->HeaderLength);\r
-\r
- //\r
- // Let NonVolatileVariableBase point to flash variable store base directly after FTW ready.\r
- //\r
- mVariableModuleGlobal->VariableGlobal.NonVolatileVariableBase = VariableStoreBase;\r
- VariableStoreHeader = (VARIABLE_STORE_HEADER *)(UINTN)VariableStoreBase;\r
-\r
- //\r
- // Check if the free area is really free.\r
- //\r
- for (Index = mVariableModuleGlobal->NonVolatileLastVariableOffset; Index < VariableStoreHeader->Size; Index++) {\r
- Data = ((UINT8 *) mNvVariableCache)[Index];\r
- if (Data != 0xff) {\r
- //\r
- // There must be something wrong in variable store, do reclaim operation.\r
- //\r
- Status = Reclaim (\r
- mVariableModuleGlobal->VariableGlobal.NonVolatileVariableBase,\r
- &mVariableModuleGlobal->NonVolatileLastVariableOffset,\r
- FALSE,\r
- NULL,\r
- NULL,\r
- 0,\r
- FALSE\r
- );\r
- if (EFI_ERROR (Status)) {\r
- return Status;\r
- }\r
- break;\r
- }\r
- }\r
-\r
- FlushHobVariableToFlash (NULL, NULL);\r
-\r
- //\r
- // Authenticated variable initialize.\r
- //\r
- Status = AutenticatedVariableServiceInitialize (mVariableModuleGlobal->MaxAuthVariableSize - sizeof (VARIABLE_HEADER));\r
-\r
- return Status;\r
-}\r
-\r
-\r
-/**\r
- Initializes variable store area for non-volatile and volatile variable.\r
-\r
- @retval EFI_SUCCESS Function successfully executed.\r
- @retval EFI_OUT_OF_RESOURCES Fail to allocate enough memory resource.\r
-\r
-**/\r
-EFI_STATUS\r
-VariableCommonInitialize (\r
- VOID\r
- )\r
-{\r
- EFI_STATUS Status;\r
- VARIABLE_STORE_HEADER *VolatileVariableStore;\r
- VARIABLE_STORE_HEADER *VariableStoreHeader;\r
- UINT64 VariableStoreLength;\r
- UINTN ScratchSize;\r
- EFI_HOB_GUID_TYPE *GuidHob;\r
-\r
- //\r
- // Allocate runtime memory for variable driver global structure.\r
- //\r
- mVariableModuleGlobal = AllocateRuntimeZeroPool (sizeof (VARIABLE_MODULE_GLOBAL));\r
- if (mVariableModuleGlobal == NULL) {\r
- return EFI_OUT_OF_RESOURCES;\r
- }\r
-\r
- InitializeLock (&mVariableModuleGlobal->VariableGlobal.VariableServicesLock, TPL_NOTIFY);\r
-\r
- //\r
- // Get HOB variable store.\r
- //\r
- GuidHob = GetFirstGuidHob (&gEfiAuthenticatedVariableGuid);\r
- if (GuidHob != NULL) {\r
- VariableStoreHeader = GET_GUID_HOB_DATA (GuidHob);\r
- VariableStoreLength = (UINT64) (GuidHob->Header.HobLength - sizeof (EFI_HOB_GUID_TYPE));\r
- if (GetVariableStoreStatus (VariableStoreHeader) == EfiValid) {\r
- mVariableModuleGlobal->VariableGlobal.HobVariableBase = (EFI_PHYSICAL_ADDRESS) (UINTN) AllocateRuntimeCopyPool ((UINTN) VariableStoreLength, (VOID *) VariableStoreHeader);\r
- if (mVariableModuleGlobal->VariableGlobal.HobVariableBase == 0) {\r
- FreePool (mVariableModuleGlobal);\r
- return EFI_OUT_OF_RESOURCES;\r
- }\r
- } else {\r
- DEBUG ((EFI_D_ERROR, "HOB Variable Store header is corrupted!\n"));\r
- }\r
- }\r
-\r
- //\r
- // Allocate memory for volatile variable store, note that there is a scratch space to store scratch data.\r
- //\r
- ScratchSize = MAX_NV_VARIABLE_SIZE;\r
- mVariableModuleGlobal->ScratchBufferSize = ScratchSize;\r
- VolatileVariableStore = AllocateRuntimePool (PcdGet32 (PcdVariableStoreSize) + ScratchSize);\r
- if (VolatileVariableStore == NULL) {\r
- if (mVariableModuleGlobal->VariableGlobal.HobVariableBase != 0) {\r
- FreePool ((VOID *) (UINTN) mVariableModuleGlobal->VariableGlobal.HobVariableBase);\r
- }\r
- FreePool (mVariableModuleGlobal);\r
- return EFI_OUT_OF_RESOURCES;\r
- }\r
-\r
- SetMem (VolatileVariableStore, PcdGet32 (PcdVariableStoreSize) + ScratchSize, 0xff);\r
-\r
- //\r
- // Initialize Variable Specific Data.\r
- //\r
- mVariableModuleGlobal->VariableGlobal.VolatileVariableBase = (EFI_PHYSICAL_ADDRESS) (UINTN) VolatileVariableStore;\r
- mVariableModuleGlobal->VolatileLastVariableOffset = (UINTN) GetStartPointer (VolatileVariableStore) - (UINTN) VolatileVariableStore;\r
-\r
- CopyGuid (&VolatileVariableStore->Signature, &gEfiAuthenticatedVariableGuid);\r
- VolatileVariableStore->Size = PcdGet32 (PcdVariableStoreSize);\r
- VolatileVariableStore->Format = VARIABLE_STORE_FORMATTED;\r
- VolatileVariableStore->State = VARIABLE_STORE_HEALTHY;\r
- VolatileVariableStore->Reserved = 0;\r
- VolatileVariableStore->Reserved1 = 0;\r
-\r
- //\r
- // Init non-volatile variable store.\r
- //\r
- Status = InitNonVolatileVariableStore ();\r
- if (EFI_ERROR (Status)) {\r
- if (mVariableModuleGlobal->VariableGlobal.HobVariableBase != 0) {\r
- FreePool ((VOID *) (UINTN) mVariableModuleGlobal->VariableGlobal.HobVariableBase);\r
- }\r
- FreePool (mVariableModuleGlobal);\r
- FreePool (VolatileVariableStore);\r
- }\r
-\r
- return Status;\r
-}\r
-\r
-\r
-/**\r
- Get the proper fvb handle and/or fvb protocol by the given Flash address.\r
-\r
- @param[in] Address The Flash address.\r
- @param[out] FvbHandle In output, if it is not NULL, it points to the proper FVB handle.\r
- @param[out] FvbProtocol In output, if it is not NULL, it points to the proper FVB protocol.\r
-\r
-**/\r
-EFI_STATUS\r
-GetFvbInfoByAddress (\r
- IN EFI_PHYSICAL_ADDRESS Address,\r
- OUT EFI_HANDLE *FvbHandle OPTIONAL,\r
- OUT EFI_FIRMWARE_VOLUME_BLOCK_PROTOCOL **FvbProtocol OPTIONAL\r
- )\r
-{\r
- EFI_STATUS Status;\r
- EFI_HANDLE *HandleBuffer;\r
- UINTN HandleCount;\r
- UINTN Index;\r
- EFI_PHYSICAL_ADDRESS FvbBaseAddress;\r
- EFI_FIRMWARE_VOLUME_BLOCK_PROTOCOL *Fvb;\r
- EFI_FVB_ATTRIBUTES_2 Attributes;\r
- UINTN BlockSize;\r
- UINTN NumberOfBlocks;\r
-\r
- HandleBuffer = NULL;\r
- //\r
- // Get all FVB handles.\r
- //\r
- Status = GetFvbCountAndBuffer (&HandleCount, &HandleBuffer);\r
- if (EFI_ERROR (Status)) {\r
- return EFI_NOT_FOUND;\r
- }\r
-\r
- //\r
- // Get the FVB to access variable store.\r
- //\r
- Fvb = NULL;\r
- for (Index = 0; Index < HandleCount; Index += 1, Status = EFI_NOT_FOUND, Fvb = NULL) {\r
- Status = GetFvbByHandle (HandleBuffer[Index], &Fvb);\r
- if (EFI_ERROR (Status)) {\r
- Status = EFI_NOT_FOUND;\r
- break;\r
- }\r
-\r
- //\r
- // Ensure this FVB protocol supported Write operation.\r
- //\r
- Status = Fvb->GetAttributes (Fvb, &Attributes);\r
- if (EFI_ERROR (Status) || ((Attributes & EFI_FVB2_WRITE_STATUS) == 0)) {\r
- continue;\r
- }\r
-\r
- //\r
- // Compare the address and select the right one.\r
- //\r
- Status = Fvb->GetPhysicalAddress (Fvb, &FvbBaseAddress);\r
- if (EFI_ERROR (Status)) {\r
- continue;\r
- }\r
-\r
- //\r
- // Assume one FVB has one type of BlockSize.\r
- //\r
- Status = Fvb->GetBlockSize (Fvb, 0, &BlockSize, &NumberOfBlocks);\r
- if (EFI_ERROR (Status)) {\r
- continue;\r
- }\r
-\r
- if ((Address >= FvbBaseAddress) && (Address < (FvbBaseAddress + BlockSize * NumberOfBlocks))) {\r
- if (FvbHandle != NULL) {\r
- *FvbHandle = HandleBuffer[Index];\r
- }\r
- if (FvbProtocol != NULL) {\r
- *FvbProtocol = Fvb;\r
- }\r
- Status = EFI_SUCCESS;\r
- break;\r
- }\r
- }\r
- FreePool (HandleBuffer);\r
-\r
- if (Fvb == NULL) {\r
- Status = EFI_NOT_FOUND;\r
- }\r
-\r
- return Status;\r
-}\r
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