VariableServiceSetVariable(), VariableServiceQueryVariableInfo(), ReclaimForOS(), \r
SmmVariableGetStatistics() should also do validation based on its own knowledge.\r
\r
-Copyright (c) 2010 - 2013, Intel Corporation. All rights reserved.<BR>\r
+Copyright (c) 2010 - 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
#include <Protocol/SmmFirmwareVolumeBlock.h>\r
#include <Protocol/SmmFaultTolerantWrite.h>\r
#include <Protocol/SmmAccess2.h>\r
+#include <Protocol/SmmEndOfDxe.h>\r
+#include <Protocol/SmmVarCheck.h>\r
\r
#include <Library/SmmServicesTableLib.h>\r
+#include <Library/SmmMemLib.h>\r
\r
#include <Guid/AuthenticatedVariableFormat.h>\r
#include <Guid/SmmVariableCommon.h>\r
#include "Variable.h"\r
\r
-EFI_SMRAM_DESCRIPTOR *mSmramRanges;\r
-UINTN mSmramRangeCount;\r
-\r
extern VARIABLE_INFO_ENTRY *gVariableInfo;\r
EFI_HANDLE mSmmVariableHandle = NULL;\r
EFI_HANDLE mVariableHandle = NULL;\r
EFI_GUID mZeroGuid = {0, 0, 0, {0, 0, 0, 0, 0, 0, 0, 0}};\r
UINT8 *mVariableBufferPayload = NULL;\r
UINTN mVariableBufferPayloadSize;\r
+extern BOOLEAN mEndOfDxe;\r
+extern BOOLEAN mEnableLocking;\r
\r
-EFI_SMM_VARIABLE_PROTOCOL gSmmVariable = {\r
- VariableServiceGetVariable,\r
- VariableServiceGetNextVariableName,\r
- VariableServiceSetVariable,\r
- VariableServiceQueryVariableInfo\r
-};\r
+/**\r
+ SecureBoot Hook for SetVariable.\r
\r
+ @param[in] VariableName Name of Variable to be found.\r
+ @param[in] VendorGuid Variable vendor GUID.\r
\r
-/**\r
- Return TRUE if ExitBootServices () has been called.\r
- \r
- @retval TRUE If ExitBootServices () has been called.\r
**/\r
-BOOLEAN\r
-AtRuntime (\r
- VOID\r
+VOID\r
+EFIAPI\r
+SecureBootHook (\r
+ IN CHAR16 *VariableName,\r
+ IN EFI_GUID *VendorGuid\r
)\r
{\r
- return mAtRuntime;\r
+ return ;\r
}\r
\r
/**\r
- This function check if the address is in SMRAM.\r
\r
- @param Buffer the buffer address to be checked.\r
- @param Length the buffer length to be checked.\r
+ This code sets variable in storage blocks (Volatile or Non-Volatile).\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
- @retval TRUE this address is in SMRAM.\r
- @retval FALSE this address is NOT in SMRAM.\r
**/\r
-BOOLEAN\r
-InternalIsAddressInSmram (\r
- IN EFI_PHYSICAL_ADDRESS Buffer,\r
- IN UINT64 Length\r
+EFI_STATUS\r
+EFIAPI\r
+SmmVariableSetVariable (\r
+ IN CHAR16 *VariableName,\r
+ IN EFI_GUID *VendorGuid,\r
+ IN UINT32 Attributes,\r
+ IN UINTN DataSize,\r
+ IN VOID *Data\r
)\r
{\r
- UINTN Index;\r
-\r
- for (Index = 0; Index < mSmramRangeCount; Index ++) {\r
- if (((Buffer >= mSmramRanges[Index].CpuStart) && (Buffer < mSmramRanges[Index].CpuStart + mSmramRanges[Index].PhysicalSize)) ||\r
- ((mSmramRanges[Index].CpuStart >= Buffer) && (mSmramRanges[Index].CpuStart < Buffer + Length))) {\r
- return TRUE;\r
- }\r
- }\r
+ EFI_STATUS Status;\r
\r
- return FALSE;\r
+ //\r
+ // Disable write protection when the calling SetVariable() through EFI_SMM_VARIABLE_PROTOCOL.\r
+ //\r
+ mEnableLocking = FALSE;\r
+ Status = VariableServiceSetVariable (\r
+ VariableName,\r
+ VendorGuid,\r
+ Attributes,\r
+ DataSize,\r
+ Data\r
+ );\r
+ mEnableLocking = TRUE;\r
+ return Status;\r
}\r
\r
-/**\r
- This function check if the address refered by Buffer and Length is valid.\r
+EFI_SMM_VARIABLE_PROTOCOL gSmmVariable = {\r
+ VariableServiceGetVariable,\r
+ VariableServiceGetNextVariableName,\r
+ SmmVariableSetVariable,\r
+ VariableServiceQueryVariableInfo\r
+};\r
\r
- @param Buffer the buffer address to be checked.\r
- @param Length the buffer length to be checked.\r
+EDKII_SMM_VAR_CHECK_PROTOCOL mSmmVarCheck = { VarCheckRegisterSetVariableCheckHandler,\r
+ VarCheckVariablePropertySet,\r
+ VarCheckVariablePropertyGet };\r
\r
- @retval TRUE this address is valid.\r
- @retval FALSE this address is NOT valid.\r
+/**\r
+ Return TRUE if ExitBootServices () has been called.\r
+ \r
+ @retval TRUE If ExitBootServices () has been called.\r
**/\r
BOOLEAN\r
-InternalIsAddressValid (\r
- IN UINTN Buffer,\r
- IN UINTN Length\r
+AtRuntime (\r
+ VOID\r
)\r
{\r
- if (Buffer > (MAX_ADDRESS - Length)) {\r
- //\r
- // Overflow happen\r
- //\r
- return FALSE;\r
- }\r
- if (InternalIsAddressInSmram ((EFI_PHYSICAL_ADDRESS)Buffer, (UINT64)Length)) {\r
- return FALSE;\r
- }\r
- return TRUE;\r
+ return mAtRuntime;\r
}\r
\r
/**\r
SMM_VARIABLE_COMMUNICATE_GET_NEXT_VARIABLE_NAME *GetNextVariableName;\r
SMM_VARIABLE_COMMUNICATE_QUERY_VARIABLE_INFO *QueryVariableInfo;\r
VARIABLE_INFO_ENTRY *VariableInfo;\r
+ SMM_VARIABLE_COMMUNICATE_LOCK_VARIABLE *VariableToLock;\r
+ SMM_VARIABLE_COMMUNICATE_VAR_CHECK_VARIABLE_PROPERTY *CommVariableProperty;\r
UINTN InfoSize;\r
UINTN NameBufferSize;\r
UINTN CommBufferPayloadSize;\r
+ UINTN TempCommBufferSize;\r
\r
//\r
// If input is invalid, stop processing this SMI\r
return EFI_SUCCESS;\r
}\r
\r
- if (*CommBufferSize < SMM_VARIABLE_COMMUNICATE_HEADER_SIZE) {\r
+ TempCommBufferSize = *CommBufferSize;\r
+\r
+ if (TempCommBufferSize < SMM_VARIABLE_COMMUNICATE_HEADER_SIZE) {\r
DEBUG ((EFI_D_ERROR, "SmmVariableHandler: SMM communication buffer size invalid!\n"));\r
return EFI_SUCCESS;\r
}\r
- CommBufferPayloadSize = *CommBufferSize - SMM_VARIABLE_COMMUNICATE_HEADER_SIZE;\r
+ CommBufferPayloadSize = TempCommBufferSize - SMM_VARIABLE_COMMUNICATE_HEADER_SIZE;\r
if (CommBufferPayloadSize > mVariableBufferPayloadSize) {\r
DEBUG ((EFI_D_ERROR, "SmmVariableHandler: SMM communication buffer payload size invalid!\n"));\r
return EFI_SUCCESS;\r
}\r
\r
- if (!InternalIsAddressValid ((UINTN)CommBuffer, *CommBufferSize)) {\r
+ if (!SmmIsBufferOutsideSmmValid ((UINTN)CommBuffer, TempCommBufferSize)) {\r
DEBUG ((EFI_D_ERROR, "SmmVariableHandler: SMM communication buffer in SMRAM or overflow!\n"));\r
return EFI_SUCCESS;\r
}\r
break;\r
\r
case SMM_VARIABLE_FUNCTION_READY_TO_BOOT:\r
+ mEndOfDxe = TRUE;\r
+ //\r
+ // The initialization for variable quota.\r
+ //\r
+ InitializeVariableQuota ();\r
if (AtRuntime()) {\r
Status = EFI_UNSUPPORTED;\r
break;\r
\r
case SMM_VARIABLE_FUNCTION_GET_STATISTICS:\r
VariableInfo = (VARIABLE_INFO_ENTRY *) SmmVariableFunctionHeader->Data;\r
- InfoSize = *CommBufferSize - SMM_VARIABLE_COMMUNICATE_HEADER_SIZE;\r
+ InfoSize = TempCommBufferSize - SMM_VARIABLE_COMMUNICATE_HEADER_SIZE;\r
\r
//\r
// Do not need to check SmmVariableFunctionHeader->Data in SMRAM here. \r
// It is covered by previous CommBuffer check \r
//\r
\r
- if (InternalIsAddressInSmram ((EFI_PHYSICAL_ADDRESS)(UINTN)CommBufferSize, sizeof(UINTN))) {\r
+ if (!SmmIsBufferOutsideSmmValid ((EFI_PHYSICAL_ADDRESS)(UINTN)CommBufferSize, sizeof(UINTN))) {\r
DEBUG ((EFI_D_ERROR, "GetStatistics: SMM communication buffer in SMRAM!\n"));\r
Status = EFI_ACCESS_DENIED;\r
goto EXIT;\r
*CommBufferSize = InfoSize + SMM_VARIABLE_COMMUNICATE_HEADER_SIZE;\r
break;\r
\r
+ case SMM_VARIABLE_FUNCTION_LOCK_VARIABLE:\r
+ if (mEndOfDxe) {\r
+ Status = EFI_ACCESS_DENIED;\r
+ } else {\r
+ VariableToLock = (SMM_VARIABLE_COMMUNICATE_LOCK_VARIABLE *) SmmVariableFunctionHeader->Data;\r
+ Status = VariableLockRequestToLock (\r
+ NULL,\r
+ VariableToLock->Name,\r
+ &VariableToLock->Guid\r
+ );\r
+ }\r
+ break;\r
+ case SMM_VARIABLE_FUNCTION_VAR_CHECK_VARIABLE_PROPERTY_SET:\r
+ if (mEndOfDxe) {\r
+ Status = EFI_ACCESS_DENIED;\r
+ } else {\r
+ CommVariableProperty = (SMM_VARIABLE_COMMUNICATE_VAR_CHECK_VARIABLE_PROPERTY *) SmmVariableFunctionHeader->Data;\r
+ Status = VarCheckVariablePropertySet (\r
+ CommVariableProperty->Name,\r
+ &CommVariableProperty->Guid,\r
+ &CommVariableProperty->VariableProperty\r
+ );\r
+ }\r
+ break;\r
+ case SMM_VARIABLE_FUNCTION_VAR_CHECK_VARIABLE_PROPERTY_GET:\r
+ if (CommBufferPayloadSize < OFFSET_OF (SMM_VARIABLE_COMMUNICATE_VAR_CHECK_VARIABLE_PROPERTY, Name)) {\r
+ DEBUG ((EFI_D_ERROR, "VarCheckVariablePropertyGet: SMM communication buffer size invalid!\n"));\r
+ return EFI_SUCCESS;\r
+ }\r
+ //\r
+ // Copy the input communicate buffer payload to pre-allocated SMM variable buffer payload.\r
+ //\r
+ CopyMem (mVariableBufferPayload, SmmVariableFunctionHeader->Data, CommBufferPayloadSize);\r
+ CommVariableProperty = (SMM_VARIABLE_COMMUNICATE_VAR_CHECK_VARIABLE_PROPERTY *) mVariableBufferPayload;\r
+ if ((UINTN) (~0) - CommVariableProperty->NameSize < OFFSET_OF (SMM_VARIABLE_COMMUNICATE_VAR_CHECK_VARIABLE_PROPERTY, Name)) {\r
+ //\r
+ // Prevent InfoSize overflow happen\r
+ //\r
+ Status = EFI_ACCESS_DENIED;\r
+ goto EXIT;\r
+ }\r
+ InfoSize = OFFSET_OF (SMM_VARIABLE_COMMUNICATE_VAR_CHECK_VARIABLE_PROPERTY, Name) + CommVariableProperty->NameSize;\r
+\r
+ //\r
+ // SMRAM range check already covered before\r
+ //\r
+ if (InfoSize > CommBufferPayloadSize) {\r
+ DEBUG ((EFI_D_ERROR, "VarCheckVariablePropertyGet: Data size exceed communication buffer size limit!\n"));\r
+ Status = EFI_ACCESS_DENIED;\r
+ goto EXIT;\r
+ }\r
+\r
+ if (CommVariableProperty->NameSize < sizeof (CHAR16) || CommVariableProperty->Name[CommVariableProperty->NameSize/sizeof (CHAR16) - 1] != L'\0') {\r
+ //\r
+ // Make sure VariableName is A Null-terminated string.\r
+ //\r
+ Status = EFI_ACCESS_DENIED;\r
+ goto EXIT;\r
+ }\r
+\r
+ Status = VarCheckVariablePropertyGet (\r
+ CommVariableProperty->Name,\r
+ &CommVariableProperty->Guid,\r
+ &CommVariableProperty->VariableProperty\r
+ );\r
+ CopyMem (SmmVariableFunctionHeader->Data, mVariableBufferPayload, CommBufferPayloadSize);\r
+ break;\r
+\r
default:\r
Status = EFI_UNSUPPORTED;\r
}\r
return EFI_SUCCESS;\r
}\r
\r
+/**\r
+ SMM END_OF_DXE protocol notification event handler.\r
+\r
+ @param Protocol Points to the protocol's unique identifier\r
+ @param Interface Points to the interface instance\r
+ @param Handle The handle on which the interface was installed\r
+\r
+ @retval EFI_SUCCESS SmmEndOfDxeCallback runs successfully\r
+\r
+**/\r
+EFI_STATUS\r
+EFIAPI\r
+SmmEndOfDxeCallback (\r
+ IN CONST EFI_GUID *Protocol,\r
+ IN VOID *Interface,\r
+ IN EFI_HANDLE Handle\r
+ )\r
+{\r
+ DEBUG ((EFI_D_INFO, "[Variable]END_OF_DXE is signaled\n"));\r
+ mEndOfDxe = TRUE;\r
+ //\r
+ // The initialization for variable quota.\r
+ //\r
+ InitializeVariableQuota ();\r
+ if (PcdGetBool (PcdReclaimVariableSpaceAtEndOfDxe)) {\r
+ ReclaimForOS ();\r
+ }\r
+ return EFI_SUCCESS;\r
+}\r
\r
/**\r
SMM Fault Tolerant Write protocol notification event handler.\r
EFI_SMM_FIRMWARE_VOLUME_BLOCK_PROTOCOL *FvbProtocol;\r
EFI_SMM_FAULT_TOLERANT_WRITE_PROTOCOL *FtwProtocol;\r
EFI_PHYSICAL_ADDRESS NvStorageVariableBase;\r
+ UINTN FtwMaxBlockSize;\r
\r
if (mVariableModuleGlobal->FvbInstance != NULL) {\r
return EFI_SUCCESS;\r
return Status;\r
}\r
\r
+ Status = FtwProtocol->GetMaxBlockSize (FtwProtocol, &FtwMaxBlockSize);\r
+ if (!EFI_ERROR (Status)) {\r
+ ASSERT (PcdGet32 (PcdFlashNvStorageVariableSize) <= FtwMaxBlockSize);\r
+ }\r
+\r
//\r
// Find the proper FVB protocol for variable.\r
//\r
mVariableModuleGlobal->FvbInstance = FvbProtocol;\r
\r
Status = VariableWriteServiceInitialize ();\r
- ASSERT_EFI_ERROR (Status);\r
+ if (EFI_ERROR (Status)) {\r
+ DEBUG ((DEBUG_ERROR, "Variable write service initialization failed. Status = %r\n", Status));\r
+ }\r
\r
//\r
// Notify the variable wrapper driver the variable write service is ready\r
EFI_STATUS Status;\r
EFI_HANDLE VariableHandle;\r
VOID *SmmFtwRegistration;\r
- EFI_SMM_ACCESS2_PROTOCOL *SmmAccess;\r
- UINTN Size;\r
+ VOID *SmmEndOfDxeRegistration;\r
\r
//\r
// Variable initialize.\r
);\r
ASSERT_EFI_ERROR (Status);\r
\r
- //\r
- // Get SMRAM information\r
- //\r
- Status = gBS->LocateProtocol (&gEfiSmmAccess2ProtocolGuid, NULL, (VOID **)&SmmAccess);\r
- ASSERT_EFI_ERROR (Status);\r
-\r
- Size = 0;\r
- Status = SmmAccess->GetCapabilities (SmmAccess, &Size, NULL);\r
- ASSERT (Status == EFI_BUFFER_TOO_SMALL);\r
-\r
- Status = gSmst->SmmAllocatePool (\r
- EfiRuntimeServicesData,\r
- Size,\r
- (VOID **)&mSmramRanges\r
+ Status = gSmst->SmmInstallProtocolInterface (\r
+ &VariableHandle,\r
+ &gEdkiiSmmVarCheckProtocolGuid,\r
+ EFI_NATIVE_INTERFACE,\r
+ &mSmmVarCheck\r
);\r
ASSERT_EFI_ERROR (Status);\r
\r
- Status = SmmAccess->GetCapabilities (SmmAccess, &Size, mSmramRanges);\r
- ASSERT_EFI_ERROR (Status);\r
-\r
- mSmramRangeCount = Size / sizeof (EFI_SMRAM_DESCRIPTOR);\r
-\r
mVariableBufferPayloadSize = MAX (PcdGet32 (PcdMaxVariableSize), PcdGet32 (PcdMaxHardwareErrorVariableSize)) +\r
- OFFSET_OF (SMM_VARIABLE_COMMUNICATE_ACCESS_VARIABLE, Name) - sizeof (VARIABLE_HEADER);\r
+ OFFSET_OF (SMM_VARIABLE_COMMUNICATE_VAR_CHECK_VARIABLE_PROPERTY, Name) - sizeof (VARIABLE_HEADER);\r
\r
Status = gSmst->SmmAllocatePool (\r
EfiRuntimeServicesData,\r
);\r
ASSERT_EFI_ERROR (Status);\r
\r
+ //\r
+ // Register EFI_SMM_END_OF_DXE_PROTOCOL_GUID notify function.\r
+ //\r
+ Status = gSmst->SmmRegisterProtocolNotify (\r
+ &gEfiSmmEndOfDxeProtocolGuid,\r
+ SmmEndOfDxeCallback,\r
+ &SmmEndOfDxeRegistration\r
+ );\r
+ ASSERT_EFI_ERROR (Status);\r
+\r
//\r
// Register FtwNotificationEvent () notify function.\r
// \r
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