tyler.durden/audk
1
0
Fork 0
mirror of https://github.com/acidanthera/audk.git synced 2025-07-26 23:24:03 +02:00
Code Issues Packages Projects Releases Wiki Activity

MdeModulePkg/SecurityPkg Variable: Calculate enough space for PlatformLang and Lang variables and use PcdUefiVariableDefaultLangDeprecate to turn off auto update between PlatformLang and Lang variables.

Browse Source 
Contributed-under: TianoCore Contribution Agreement 1.0
Signed-off-by: Star Zeng <star.zeng@intel.com>
Reviewed-by: Jiewen Yao <jiewen.yao@intel.com>
Reviewed-by: Guo Dong <guo.dong@intel.com>

git-svn-id: https://svn.code.sf.net/p/edk2/code/trunk/edk2@15388 6f19259b-4bc3-4df7-8a09-765794883524
This commit is contained in:
Star Zeng 2014-03-25 06:56:55 +00:00 committed by lzeng14
parent a8d8d43051
commit b2bd493edb
10 changed files with 659 additions and 122 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

4
IntelFrameworkModulePkg/Universal/BdsDxe/Language.c
View File

@ -462,7 +462,7 @@ InitializeLanguage (
if (LangCodesSettingRequired) { if (LangCodesSettingRequired) {
if (!FeaturePcdGet (PcdUefiVariableDefaultLangDeprecate)) { if (!FeaturePcdGet (PcdUefiVariableDefaultLangDeprecate)) {
// //
// UEFI 2.1 depricated this variable so we support turning it off // UEFI 2.0 depricated this variable so we support turning it off
// //
Status = gRT->SetVariable ( Status = gRT->SetVariable (
L"LangCodes", L"LangCodes",
@ -492,7 +492,7 @@ InitializeLanguage (
if (!FeaturePcdGet (PcdUefiVariableDefaultLangDeprecate)) { if (!FeaturePcdGet (PcdUefiVariableDefaultLangDeprecate)) {
// //
// UEFI 2.1 depricated this variable so we support turning it off // UEFI 2.0 depricated this variable so we support turning it off
// //
InitializeLangVariable (L"Lang", LangCodes, (CHAR8 *) PcdGetPtr (PcdUefiVariableDefaultLang), TRUE); InitializeLangVariable (L"Lang", LangCodes, (CHAR8 *) PcdGetPtr (PcdUefiVariableDefaultLang), TRUE);
} }

312
MdeModulePkg/Universal/Variable/RuntimeDxe/Variable.c
View File

@ -1258,6 +1258,121 @@ VariableGetBestLanguage (
return NULL; return NULL;
} }
/**
This function is to check if the remaining variable space is enough to set
all Variables from argument list successfully. The purpose of the check
is to keep the consistency of the Variables to be in variable storage.
Note: Variables are assumed to be in same storage.
The set sequence of Variables will be same with the sequence of VariableEntry from argument list,
so follow the argument sequence to check the Variables.
@param[in] Attributes Variable attributes for Variable entries.
@param ... Variable argument list with type VARIABLE_ENTRY_CONSISTENCY *.
A NULL terminates the list.
@retval TRUE Have enough variable space to set the Variables successfully.
@retval FALSE No enough variable space to set the Variables successfully.
**/
BOOLEAN
EFIAPI
CheckRemainingSpaceForConsistency (
IN UINT32 Attributes,
...
)
{
EFI_STATUS Status;
VA_LIST Args;
VARIABLE_ENTRY_CONSISTENCY *VariableEntry;
UINT64 MaximumVariableStorageSize;
UINT64 RemainingVariableStorageSize;
UINT64 MaximumVariableSize;
UINTN TotalNeededSize;
UINTN OriginalVarSize;
VARIABLE_STORE_HEADER *VariableStoreHeader;
VARIABLE_POINTER_TRACK VariablePtrTrack;
VARIABLE_HEADER *NextVariable;
//
// Non-Volatile related.
//
VariableStoreHeader = mNvVariableCache;
Status = VariableServiceQueryVariableInfoInternal (
Attributes,
&MaximumVariableStorageSize,
&RemainingVariableStorageSize,
&MaximumVariableSize
);
ASSERT_EFI_ERROR (Status);
TotalNeededSize = 0;
VA_START (Args, Attributes);
VariableEntry = VA_ARG (Args, VARIABLE_ENTRY_CONSISTENCY *);
while (VariableEntry != NULL) {
TotalNeededSize += VariableEntry->VariableSize;
VariableEntry = VA_ARG (Args, VARIABLE_ENTRY_CONSISTENCY *);
}
VA_END (Args);
if (RemainingVariableStorageSize >= TotalNeededSize) {
//
// Already have enough space.
//
return TRUE;
} else if (AtRuntime ()) {
//
// At runtime, no reclaim.
// The original variable space of Variables can't be reused.
//
return FALSE;
}
VA_START (Args, Attributes);
VariableEntry = VA_ARG (Args, VARIABLE_ENTRY_CONSISTENCY *);
while (VariableEntry != NULL) {
//
// Check if Variable[Index] has been present and get its size.
//
OriginalVarSize = 0;
VariablePtrTrack.StartPtr = GetStartPointer (VariableStoreHeader);
VariablePtrTrack.EndPtr = GetEndPointer (VariableStoreHeader);
Status = FindVariableEx (
VariableEntry->Name,
VariableEntry->Guid,
FALSE,
&VariablePtrTrack
);
if (!EFI_ERROR (Status)) {
//
// Get size of Variable[Index].
//
NextVariable = GetNextVariablePtr (VariablePtrTrack.CurrPtr);
OriginalVarSize = (UINTN) NextVariable - (UINTN) VariablePtrTrack.CurrPtr;
//
// Add the original size of Variable[Index] to remaining variable storage size.
//
RemainingVariableStorageSize += OriginalVarSize;
}
if (VariableEntry->VariableSize > RemainingVariableStorageSize) {
//
// No enough space for Variable[Index].
//
VA_END (Args);
return FALSE;
}
//
// Sub the (new) size of Variable[Index] from remaining variable storage size.
//
RemainingVariableStorageSize -= VariableEntry->VariableSize;
VariableEntry = VA_ARG (Args, VARIABLE_ENTRY_CONSISTENCY *);
}
VA_END (Args);
return TRUE;
}
/** /**
Hook the operations in PlatformLangCodes, LangCodes, PlatformLang and Lang. Hook the operations in PlatformLangCodes, LangCodes, PlatformLang and Lang.
@ -1292,6 +1407,9 @@ AutoUpdateLangVariable (
UINT32 Attributes; UINT32 Attributes;
VARIABLE_POINTER_TRACK Variable; VARIABLE_POINTER_TRACK Variable;
BOOLEAN SetLanguageCodes; BOOLEAN SetLanguageCodes;
UINTN VarNameSize;
UINTN VarDataSize;
VARIABLE_ENTRY_CONSISTENCY VariableEntry[2];
// //
// Don't do updates for delete operation // Don't do updates for delete operation
@ -1413,6 +1531,30 @@ AutoUpdateLangVariable (
// //
BestLang = GetLangFromSupportedLangCodes (mVariableModuleGlobal->LangCodes, Index, TRUE); BestLang = GetLangFromSupportedLangCodes (mVariableModuleGlobal->LangCodes, Index, TRUE);
//
// Calculate the needed variable size for Lang variable.
//
VarNameSize = StrSize (EFI_LANG_VARIABLE_NAME);
VarDataSize = ISO_639_2_ENTRY_SIZE + 1;
VariableEntry[0].VariableSize = sizeof (VARIABLE_HEADER) + VarNameSize + GET_PAD_SIZE (VarNameSize) + VarDataSize + GET_PAD_SIZE (VarDataSize);
VariableEntry[0].VariableSize = HEADER_ALIGN (VariableEntry[0].VariableSize);
VariableEntry[0].Guid = &gEfiGlobalVariableGuid;
VariableEntry[0].Name = EFI_LANG_VARIABLE_NAME;
//
// Calculate the needed variable size for PlatformLang variable.
//
VarNameSize = StrSize (EFI_PLATFORM_LANG_VARIABLE_NAME);
VarDataSize = AsciiStrSize (BestPlatformLang);
VariableEntry[1].VariableSize = sizeof (VARIABLE_HEADER) + VarNameSize + GET_PAD_SIZE (VarNameSize) + VarDataSize + GET_PAD_SIZE (VarDataSize);
VariableEntry[1].VariableSize = HEADER_ALIGN (VariableEntry[1].VariableSize);
VariableEntry[1].Guid = &gEfiGlobalVariableGuid;
VariableEntry[1].Name = EFI_PLATFORM_LANG_VARIABLE_NAME;
if (!CheckRemainingSpaceForConsistency (VARIABLE_ATTRIBUTE_NV_BS_RT, &VariableEntry[0], &VariableEntry[1], NULL)) {
//
// No enough variable space to set both Lang and PlatformLang successfully.
//
Status = EFI_OUT_OF_RESOURCES;
} else {
// //
// Successfully convert PlatformLang to Lang, and set the BestLang value into Lang variable simultaneously. // Successfully convert PlatformLang to Lang, and set the BestLang value into Lang variable simultaneously.
// //
@ -1420,8 +1562,9 @@ AutoUpdateLangVariable (
Status = UpdateVariable (EFI_LANG_VARIABLE_NAME, &gEfiGlobalVariableGuid, BestLang, Status = UpdateVariable (EFI_LANG_VARIABLE_NAME, &gEfiGlobalVariableGuid, BestLang,
ISO_639_2_ENTRY_SIZE + 1, Attributes, &Variable); ISO_639_2_ENTRY_SIZE + 1, Attributes, &Variable);
}
DEBUG ((EFI_D_INFO, "Variable Driver Auto Update PlatformLang, PlatformLang:%a, Lang:%a: Status: %r\n", BestPlatformLang, BestLang, Status)); DEBUG ((EFI_D_INFO, "Variable Driver Auto Update PlatformLang, PlatformLang:%a, Lang:%a Status: %r\n", BestPlatformLang, BestLang, Status));
} }
} }
@ -1445,6 +1588,30 @@ AutoUpdateLangVariable (
// //
BestPlatformLang = GetLangFromSupportedLangCodes (mVariableModuleGlobal->PlatformLangCodes, Index, FALSE); BestPlatformLang = GetLangFromSupportedLangCodes (mVariableModuleGlobal->PlatformLangCodes, Index, FALSE);
//
// Calculate the needed variable size for PlatformLang variable.
//
VarNameSize = StrSize (EFI_PLATFORM_LANG_VARIABLE_NAME);
VarDataSize = AsciiStrSize (BestPlatformLang);
VariableEntry[0].VariableSize = sizeof (VARIABLE_HEADER) + VarNameSize + GET_PAD_SIZE (VarNameSize) + VarDataSize + GET_PAD_SIZE (VarDataSize);
VariableEntry[0].VariableSize = HEADER_ALIGN (VariableEntry[0].VariableSize);
VariableEntry[0].Guid = &gEfiGlobalVariableGuid;
VariableEntry[0].Name = EFI_PLATFORM_LANG_VARIABLE_NAME;
//
// Calculate the needed variable size for Lang variable.
//
VarNameSize = StrSize (EFI_LANG_VARIABLE_NAME);
VarDataSize = ISO_639_2_ENTRY_SIZE + 1;
VariableEntry[1].VariableSize = sizeof (VARIABLE_HEADER) + VarNameSize + GET_PAD_SIZE (VarNameSize) + VarDataSize + GET_PAD_SIZE (VarDataSize);
VariableEntry[1].VariableSize = HEADER_ALIGN (VariableEntry[1].VariableSize);
VariableEntry[1].Guid = &gEfiGlobalVariableGuid;
VariableEntry[1].Name = EFI_LANG_VARIABLE_NAME;
if (!CheckRemainingSpaceForConsistency (VARIABLE_ATTRIBUTE_NV_BS_RT, &VariableEntry[0], &VariableEntry[1], NULL)) {
//
// No enough variable space to set both PlatformLang and Lang successfully.
//
Status = EFI_OUT_OF_RESOURCES;
} else {
// //
// Successfully convert Lang to PlatformLang, and set the BestPlatformLang value into PlatformLang variable simultaneously. // Successfully convert Lang to PlatformLang, and set the BestPlatformLang value into PlatformLang variable simultaneously.
// //
@ -1452,13 +1619,21 @@ AutoUpdateLangVariable (
Status = UpdateVariable (EFI_PLATFORM_LANG_VARIABLE_NAME, &gEfiGlobalVariableGuid, BestPlatformLang, Status = UpdateVariable (EFI_PLATFORM_LANG_VARIABLE_NAME, &gEfiGlobalVariableGuid, BestPlatformLang,
AsciiStrSize (BestPlatformLang), Attributes, &Variable); AsciiStrSize (BestPlatformLang), Attributes, &Variable);
}
DEBUG ((EFI_D_INFO, "Variable Driver Auto Update Lang, Lang:%a, PlatformLang:%a Status: %r\n", BestLang, BestPlatformLang, Status)); DEBUG ((EFI_D_INFO, "Variable Driver Auto Update Lang, Lang:%a, PlatformLang:%a Status: %r\n", BestLang, BestPlatformLang, Status));
} }
} }
} }
if (SetLanguageCodes) {
//
// Continue to set PlatformLangCodes or LangCodes.
//
return EFI_SUCCESS;
} else {
return Status; return Status;
}
} }
/** /**
@ -2492,6 +2667,7 @@ VariableServiceSetVariable (
} }
} }
if (!FeaturePcdGet (PcdUefiVariableDefaultLangDeprecate)) {
// //
// Hook the operation of setting PlatformLangCodes/PlatformLang and LangCodes/Lang. // Hook the operation of setting PlatformLangCodes/PlatformLang and LangCodes/Lang.
// //
@ -2502,6 +2678,7 @@ VariableServiceSetVariable (
// //
goto Done; goto Done;
} }
}
Status = UpdateVariable (VariableName, VendorGuid, Data, DataSize, Attributes, &Variable); Status = UpdateVariable (VariableName, VendorGuid, Data, DataSize, Attributes, &Variable);
@ -2525,14 +2702,12 @@ Done:
@param MaximumVariableSize Pointer to the maximum size of an individual EFI variables @param MaximumVariableSize Pointer to the maximum size of an individual EFI variables
associated with the attributes specified. associated with the attributes specified.
@return EFI_INVALID_PARAMETER An invalid combination of attribute bits was supplied.
@return EFI_SUCCESS Query successfully. @return EFI_SUCCESS Query successfully.
@return EFI_UNSUPPORTED The attribute is not supported on this platform.
**/ **/
EFI_STATUS EFI_STATUS
EFIAPI EFIAPI
VariableServiceQueryVariableInfo ( VariableServiceQueryVariableInfoInternal (
IN UINT32 Attributes, IN UINT32 Attributes,
OUT UINT64 *MaximumVariableStorageSize, OUT UINT64 *MaximumVariableStorageSize,
OUT UINT64 *RemainingVariableStorageSize, OUT UINT64 *RemainingVariableStorageSize,
@ -2545,43 +2720,12 @@ VariableServiceQueryVariableInfo (
VARIABLE_STORE_HEADER *VariableStoreHeader; VARIABLE_STORE_HEADER *VariableStoreHeader;
UINT64 CommonVariableTotalSize; UINT64 CommonVariableTotalSize;
UINT64 HwErrVariableTotalSize; UINT64 HwErrVariableTotalSize;
EFI_STATUS Status;
VARIABLE_POINTER_TRACK VariablePtrTrack;
CommonVariableTotalSize = 0; CommonVariableTotalSize = 0;
HwErrVariableTotalSize = 0; HwErrVariableTotalSize = 0;
if(MaximumVariableStorageSize == NULL || RemainingVariableStorageSize == NULL || MaximumVariableSize == NULL || Attributes == 0) {
return EFI_INVALID_PARAMETER;
}
if((Attributes & (EFI_VARIABLE_NON_VOLATILE | EFI_VARIABLE_BOOTSERVICE_ACCESS | EFI_VARIABLE_RUNTIME_ACCESS | EFI_VARIABLE_HARDWARE_ERROR_RECORD)) == 0) {
//
// Make sure the Attributes combination is supported by the platform.
//
return EFI_UNSUPPORTED;
} else if ((Attributes & (EFI_VARIABLE_RUNTIME_ACCESS | EFI_VARIABLE_BOOTSERVICE_ACCESS)) == EFI_VARIABLE_RUNTIME_ACCESS) {
//
// Make sure if runtime bit is set, boot service bit is set also.
//
return EFI_INVALID_PARAMETER;
} else if (AtRuntime () && ((Attributes & EFI_VARIABLE_RUNTIME_ACCESS) == 0)) {
//
// Make sure RT Attribute is set if we are in Runtime phase.
//
return EFI_INVALID_PARAMETER;
} else if ((Attributes & (EFI_VARIABLE_NON_VOLATILE | EFI_VARIABLE_HARDWARE_ERROR_RECORD)) == EFI_VARIABLE_HARDWARE_ERROR_RECORD) {
//
// Make sure Hw Attribute is set with NV.
//
return EFI_INVALID_PARAMETER;
} else if ((Attributes & EFI_VARIABLE_AUTHENTICATED_WRITE_ACCESS) != 0) {
//
// Not support authentiated variable write yet.
//
return EFI_UNSUPPORTED;
}
AcquireLockOnlyAtBootTime(&mVariableModuleGlobal->VariableGlobal.VariableServicesLock);
if((Attributes & EFI_VARIABLE_NON_VOLATILE) == 0) { if((Attributes & EFI_VARIABLE_NON_VOLATILE) == 0) {
// //
// Query is Volatile related. // Query is Volatile related.
@ -2653,6 +2797,27 @@ VariableServiceQueryVariableInfo (
} else { } else {
CommonVariableTotalSize += VariableSize; CommonVariableTotalSize += VariableSize;
} }
} else if (Variable->State == (VAR_IN_DELETED_TRANSITION & VAR_ADDED)) {
//
// If it is a IN_DELETED_TRANSITION variable,
// and there is not also a same ADDED one at the same time,
// this IN_DELETED_TRANSITION variable is valid.
//
VariablePtrTrack.StartPtr = GetStartPointer (VariableStoreHeader);
VariablePtrTrack.EndPtr = GetEndPointer (VariableStoreHeader);
Status = FindVariableEx (
GetVariableNamePtr (Variable),
&Variable->VendorGuid,
FALSE,
&VariablePtrTrack
);
if (!EFI_ERROR (Status) && VariablePtrTrack.CurrPtr->State != VAR_ADDED) {
if ((Variable->Attributes & EFI_VARIABLE_HARDWARE_ERROR_RECORD) == EFI_VARIABLE_HARDWARE_ERROR_RECORD) {
HwErrVariableTotalSize += VariableSize;
} else {
CommonVariableTotalSize += VariableSize;
}
}
} }
} }
@ -2674,10 +2839,81 @@ VariableServiceQueryVariableInfo (
*MaximumVariableSize = *RemainingVariableStorageSize - sizeof (VARIABLE_HEADER); *MaximumVariableSize = *RemainingVariableStorageSize - sizeof (VARIABLE_HEADER);
} }
ReleaseLockOnlyAtBootTime (&mVariableModuleGlobal->VariableGlobal.VariableServicesLock);
return EFI_SUCCESS; return EFI_SUCCESS;
} }
/**
This code returns information about the EFI variables.
@param Attributes Attributes bitmask to specify the type of variables
on which to return information.
@param MaximumVariableStorageSize Pointer to the maximum size of the storage space available
for the EFI variables associated with the attributes specified.
@param RemainingVariableStorageSize Pointer to the remaining size of the storage space available
for EFI variables associated with the attributes specified.
@param MaximumVariableSize Pointer to the maximum size of an individual EFI variables
associated with the attributes specified.
@return EFI_INVALID_PARAMETER An invalid combination of attribute bits was supplied.
@return EFI_SUCCESS Query successfully.
@return EFI_UNSUPPORTED The attribute is not supported on this platform.
**/
EFI_STATUS
EFIAPI
VariableServiceQueryVariableInfo (
IN UINT32 Attributes,
OUT UINT64 *MaximumVariableStorageSize,
OUT UINT64 *RemainingVariableStorageSize,
OUT UINT64 *MaximumVariableSize
)
{
EFI_STATUS Status;
if(MaximumVariableStorageSize == NULL || RemainingVariableStorageSize == NULL || MaximumVariableSize == NULL || Attributes == 0) {
return EFI_INVALID_PARAMETER;
}
if((Attributes & (EFI_VARIABLE_NON_VOLATILE | EFI_VARIABLE_BOOTSERVICE_ACCESS | EFI_VARIABLE_RUNTIME_ACCESS | EFI_VARIABLE_HARDWARE_ERROR_RECORD)) == 0) {
//
// Make sure the Attributes combination is supported by the platform.
//
return EFI_UNSUPPORTED;
} else if ((Attributes & (EFI_VARIABLE_RUNTIME_ACCESS | EFI_VARIABLE_BOOTSERVICE_ACCESS)) == EFI_VARIABLE_RUNTIME_ACCESS) {
//
// Make sure if runtime bit is set, boot service bit is set also.
//
return EFI_INVALID_PARAMETER;
} else if (AtRuntime () && ((Attributes & EFI_VARIABLE_RUNTIME_ACCESS) == 0)) {
//
// Make sure RT Attribute is set if we are in Runtime phase.
//
return EFI_INVALID_PARAMETER;
} else if ((Attributes & (EFI_VARIABLE_NON_VOLATILE | EFI_VARIABLE_HARDWARE_ERROR_RECORD)) == EFI_VARIABLE_HARDWARE_ERROR_RECORD) {
//
// Make sure Hw Attribute is set with NV.
//
return EFI_INVALID_PARAMETER;
} else if ((Attributes & (EFI_VARIABLE_AUTHENTICATED_WRITE_ACCESS | EFI_VARIABLE_TIME_BASED_AUTHENTICATED_WRITE_ACCESS | EFI_VARIABLE_APPEND_WRITE)) != 0) {
//
// Not support authenticated or append variable write yet.
//
return EFI_UNSUPPORTED;
}
AcquireLockOnlyAtBootTime(&mVariableModuleGlobal->VariableGlobal.VariableServicesLock);
Status = VariableServiceQueryVariableInfoInternal (
Attributes,
MaximumVariableStorageSize,
RemainingVariableStorageSize,
MaximumVariableSize
);
ReleaseLockOnlyAtBootTime (&mVariableModuleGlobal->VariableGlobal.VariableServicesLock);
return Status;
}
/** /**
This function reclaims variable storage if free size is below the threshold. This function reclaims variable storage if free size is below the threshold.

37
MdeModulePkg/Universal/Variable/RuntimeDxe/Variable.h
View File

@ -3,7 +3,7 @@
The internal header file includes the common header files, defines The internal header file includes the common header files, defines
internal structure and functions used by Variable modules. internal structure and functions used by Variable modules.
Copyright (c) 2006 - 2013, Intel Corporation. All rights reserved.<BR> Copyright (c) 2006 - 2014, Intel Corporation. All rights reserved.<BR>
This program and the accompanying materials This program and the accompanying materials
are licensed and made available under the terms and conditions of the BSD License are licensed and made available under the terms and conditions of the BSD License
which accompanies this distribution. The full text of the license may be found at which accompanies this distribution. The full text of the license may be found at
@ -101,10 +101,12 @@ typedef struct {
typedef struct { typedef struct {
EFI_GUID *Guid; EFI_GUID *Guid;
CHAR16 *Name; CHAR16 *Name;
UINT32 Attributes; // UINT32 Attributes;
UINTN DataSize; //
VOID *Data; // Variable size include variable header, name and data.
} VARIABLE_CACHE_ENTRY; //
UINTN VariableSize;
} VARIABLE_ENTRY_CONSISTENCY;
typedef struct { typedef struct {
EFI_GUID Guid; EFI_GUID Guid;
@ -443,6 +445,31 @@ VariableServiceSetVariable (
IN VOID *Data IN VOID *Data
); );
/**
This code returns information about the EFI variables.
@param Attributes Attributes bitmask to specify the type of variables
on which to return information.
@param MaximumVariableStorageSize Pointer to the maximum size of the storage space available
for the EFI variables associated with the attributes specified.
@param RemainingVariableStorageSize Pointer to the remaining size of the storage space available
for EFI variables associated with the attributes specified.
@param MaximumVariableSize Pointer to the maximum size of an individual EFI variables
associated with the attributes specified.
@return EFI_SUCCESS Query successfully.
**/
EFI_STATUS
EFIAPI
VariableServiceQueryVariableInfoInternal (
IN UINT32 Attributes,
OUT UINT64 *MaximumVariableStorageSize,
OUT UINT64 *RemainingVariableStorageSize,
OUT UINT64 *MaximumVariableSize
);
/** /**
This code returns information about the EFI variables. This code returns information about the EFI variables.

5
MdeModulePkg/Universal/Variable/RuntimeDxe/VariableRuntimeDxe.inf
View File

@ -2,7 +2,7 @@
# Component description file for Variable module. # Component description file for Variable module.
# #
# This module installs three EFI_RUNTIME_SERVICES: SetVariable, GetVariable, GetNextVariableName. # This module installs three EFI_RUNTIME_SERVICES: SetVariable, GetVariable, GetNextVariableName.
# Copyright (c) 2006 - 2013, Intel Corporation. All rights reserved.<BR> # Copyright (c) 2006 - 2014, Intel Corporation. All rights reserved.<BR>
# #
# This program and the accompanying materials # This program and the accompanying materials
# are licensed and made available under the terms and conditions of the BSD License # are licensed and made available under the terms and conditions of the BSD License
@ -80,7 +80,8 @@
gEfiMdeModulePkgTokenSpaceGuid.PcdHwErrStorageSize gEfiMdeModulePkgTokenSpaceGuid.PcdHwErrStorageSize
[FeaturePcd] [FeaturePcd]
gEfiMdeModulePkgTokenSpaceGuid.PcdVariableCollectStatistics ## SOMETIME_CONSUMES (statistic the information of variable.) gEfiMdeModulePkgTokenSpaceGuid.PcdVariableCollectStatistics ## CONSUMES # statistic the information of variable.
gEfiMdePkgTokenSpaceGuid.PcdUefiVariableDefaultLangDeprecate ## CONSUMES
[Depex] [Depex]
TRUE TRUE

5
MdeModulePkg/Universal/Variable/RuntimeDxe/VariableSmm.inf
View File

@ -14,7 +14,7 @@
# This external input must be validated carefully to avoid security issue like # This external input must be validated carefully to avoid security issue like
# buffer overflow, integer overflow. # buffer overflow, integer overflow.
# #
# Copyright (c) 2010 - 2013, Intel Corporation. All rights reserved.<BR> # Copyright (c) 2010 - 2014, Intel Corporation. All rights reserved.<BR>
# This program and the accompanying materials # This program and the accompanying materials
# are licensed and made available under the terms and conditions of the BSD License # are licensed and made available under the terms and conditions of the BSD License
# which accompanies this distribution. The full text of the license may be found at # which accompanies this distribution. The full text of the license may be found at
@ -89,7 +89,8 @@
gEfiMdeModulePkgTokenSpaceGuid.PcdHwErrStorageSize gEfiMdeModulePkgTokenSpaceGuid.PcdHwErrStorageSize
[FeaturePcd] [FeaturePcd]
gEfiMdeModulePkgTokenSpaceGuid.PcdVariableCollectStatistics ## SOMETIME_CONSUMES (statistic the information of variable.) gEfiMdeModulePkgTokenSpaceGuid.PcdVariableCollectStatistics ## CONSUMES # statistic the information of variable.
gEfiMdePkgTokenSpaceGuid.PcdUefiVariableDefaultLangDeprecate ## CONSUMES
[Depex] [Depex]
TRUE TRUE

3
MdePkg/MdePkg.dec
View File

@ -1375,7 +1375,8 @@
## If TRUE, the driver diagnostics2 protocol will not be installed. ## If TRUE, the driver diagnostics2 protocol will not be installed.
gEfiMdePkgTokenSpaceGuid.PcdDriverDiagnostics2Disable|FALSE|BOOLEAN|0x00000011 gEfiMdePkgTokenSpaceGuid.PcdDriverDiagnostics2Disable|FALSE|BOOLEAN|0x00000011
## Indicates whether EFI 1.1 ISO 639-2 language supports are obsolete ## Indicates whether EFI 1.1 ISO 639-2 language supports are obsolete.
# If TRUE, Variable driver will be also not to auto update between PlatformLang and Lang variables.
gEfiMdePkgTokenSpaceGuid.PcdUefiVariableDefaultLangDeprecate|FALSE|BOOLEAN|0x00000012 gEfiMdePkgTokenSpaceGuid.PcdUefiVariableDefaultLangDeprecate|FALSE|BOOLEAN|0x00000012
## If TRUE, UGA Draw Protocol is still consumed. ## If TRUE, UGA Draw Protocol is still consumed.

303
SecurityPkg/VariableAuthenticated/RuntimeDxe/Variable.c
View File

@ -1508,6 +1508,121 @@ VariableGetBestLanguage (
return NULL; return NULL;
} }
/**
This function is to check if the remaining variable space is enough to set
all Variables from argument list successfully. The purpose of the check
is to keep the consistency of the Variables to be in variable storage.
Note: Variables are assumed to be in same storage.
The set sequence of Variables will be same with the sequence of VariableEntry from argument list,
so follow the argument sequence to check the Variables.
@param[in] Attributes Variable attributes for Variable entries.
@param ... Variable argument list with type VARIABLE_ENTRY_CONSISTENCY *.
A NULL terminates the list.
@retval TRUE Have enough variable space to set the Variables successfully.
@retval FALSE No enough variable space to set the Variables successfully.
**/
BOOLEAN
EFIAPI
CheckRemainingSpaceForConsistency (
IN UINT32 Attributes,
...
)
{
EFI_STATUS Status;
VA_LIST Args;
VARIABLE_ENTRY_CONSISTENCY *VariableEntry;
UINT64 MaximumVariableStorageSize;
UINT64 RemainingVariableStorageSize;
UINT64 MaximumVariableSize;
UINTN TotalNeededSize;
UINTN OriginalVarSize;
VARIABLE_STORE_HEADER *VariableStoreHeader;
VARIABLE_POINTER_TRACK VariablePtrTrack;
VARIABLE_HEADER *NextVariable;
//
// Non-Volatile related.
//
VariableStoreHeader = mNvVariableCache;
Status = VariableServiceQueryVariableInfoInternal (
Attributes,
&MaximumVariableStorageSize,
&RemainingVariableStorageSize,
&MaximumVariableSize
);
ASSERT_EFI_ERROR (Status);
TotalNeededSize = 0;
VA_START (Args, Attributes);
VariableEntry = VA_ARG (Args, VARIABLE_ENTRY_CONSISTENCY *);
while (VariableEntry != NULL) {
TotalNeededSize += VariableEntry->VariableSize;
VariableEntry = VA_ARG (Args, VARIABLE_ENTRY_CONSISTENCY *);
}
VA_END (Args);
if (RemainingVariableStorageSize >= TotalNeededSize) {
//
// Already have enough space.
//
return TRUE;
} else if (AtRuntime ()) {
//
// At runtime, no reclaim.
// The original variable space of Variables can't be reused.
//
return FALSE;
}
VA_START (Args, Attributes);
VariableEntry = VA_ARG (Args, VARIABLE_ENTRY_CONSISTENCY *);
while (VariableEntry != NULL) {
//
// Check if Variable[Index] has been present and get its size.
//
OriginalVarSize = 0;
VariablePtrTrack.StartPtr = GetStartPointer (VariableStoreHeader);
VariablePtrTrack.EndPtr = GetEndPointer (VariableStoreHeader);
Status = FindVariableEx (
VariableEntry->Name,
VariableEntry->Guid,
FALSE,
&VariablePtrTrack
);
if (!EFI_ERROR (Status)) {
//
// Get size of Variable[Index].
//
NextVariable = GetNextVariablePtr (VariablePtrTrack.CurrPtr);
OriginalVarSize = (UINTN) NextVariable - (UINTN) VariablePtrTrack.CurrPtr;
//
// Add the original size of Variable[Index] to remaining variable storage size.
//
RemainingVariableStorageSize += OriginalVarSize;
}
if (VariableEntry->VariableSize > RemainingVariableStorageSize) {
//
// No enough space for Variable[Index].
//
VA_END (Args);
return FALSE;
}
//
// Sub the (new) size of Variable[Index] from remaining variable storage size.
//
RemainingVariableStorageSize -= VariableEntry->VariableSize;
VariableEntry = VA_ARG (Args, VARIABLE_ENTRY_CONSISTENCY *);
}
VA_END (Args);
return TRUE;
}
/** /**
Hook the operations in PlatformLangCodes, LangCodes, PlatformLang and Lang. Hook the operations in PlatformLangCodes, LangCodes, PlatformLang and Lang.
@ -1542,6 +1657,9 @@ AutoUpdateLangVariable (
UINT32 Attributes; UINT32 Attributes;
VARIABLE_POINTER_TRACK Variable; VARIABLE_POINTER_TRACK Variable;
BOOLEAN SetLanguageCodes; BOOLEAN SetLanguageCodes;
UINTN VarNameSize;
UINTN VarDataSize;
VARIABLE_ENTRY_CONSISTENCY VariableEntry[2];
// //
// Don't do updates for delete operation // Don't do updates for delete operation
@ -1663,6 +1781,30 @@ AutoUpdateLangVariable (
// //
BestLang = GetLangFromSupportedLangCodes (mVariableModuleGlobal->LangCodes, Index, TRUE); BestLang = GetLangFromSupportedLangCodes (mVariableModuleGlobal->LangCodes, Index, TRUE);
//
// Calculate the needed variable size for Lang variable.
//
VarNameSize = StrSize (EFI_LANG_VARIABLE_NAME);
VarDataSize = ISO_639_2_ENTRY_SIZE + 1;
VariableEntry[0].VariableSize = sizeof (VARIABLE_HEADER) + VarNameSize + GET_PAD_SIZE (VarNameSize) + VarDataSize + GET_PAD_SIZE (VarDataSize);
VariableEntry[0].VariableSize = HEADER_ALIGN (VariableEntry[0].VariableSize);
VariableEntry[0].Guid = &gEfiGlobalVariableGuid;
VariableEntry[0].Name = EFI_LANG_VARIABLE_NAME;
//
// Calculate the needed variable size for PlatformLang variable.
//
VarNameSize = StrSize (EFI_PLATFORM_LANG_VARIABLE_NAME);
VarDataSize = AsciiStrSize (BestPlatformLang);
VariableEntry[1].VariableSize = sizeof (VARIABLE_HEADER) + VarNameSize + GET_PAD_SIZE (VarNameSize) + VarDataSize + GET_PAD_SIZE (VarDataSize);
VariableEntry[1].VariableSize = HEADER_ALIGN (VariableEntry[1].VariableSize);
VariableEntry[1].Guid = &gEfiGlobalVariableGuid;
VariableEntry[1].Name = EFI_PLATFORM_LANG_VARIABLE_NAME;
if (!CheckRemainingSpaceForConsistency (VARIABLE_ATTRIBUTE_NV_BS_RT, &VariableEntry[0], &VariableEntry[1], NULL)) {
//
// No enough variable space to set both Lang and PlatformLang successfully.
//
Status = EFI_OUT_OF_RESOURCES;
} else {
// //
// Successfully convert PlatformLang to Lang, and set the BestLang value into Lang variable simultaneously. // Successfully convert PlatformLang to Lang, and set the BestLang value into Lang variable simultaneously.
// //
@ -1670,6 +1812,7 @@ AutoUpdateLangVariable (
Status = UpdateVariable (EFI_LANG_VARIABLE_NAME, &gEfiGlobalVariableGuid, BestLang, Status = UpdateVariable (EFI_LANG_VARIABLE_NAME, &gEfiGlobalVariableGuid, BestLang,
ISO_639_2_ENTRY_SIZE + 1, Attributes, 0, 0, &Variable, NULL); ISO_639_2_ENTRY_SIZE + 1, Attributes, 0, 0, &Variable, NULL);
}
DEBUG ((EFI_D_INFO, "Variable Driver Auto Update PlatformLang, PlatformLang:%a, Lang:%a Status: %r\n", BestPlatformLang, BestLang, Status)); DEBUG ((EFI_D_INFO, "Variable Driver Auto Update PlatformLang, PlatformLang:%a, Lang:%a Status: %r\n", BestPlatformLang, BestLang, Status));
} }
@ -1695,6 +1838,30 @@ AutoUpdateLangVariable (
// //
BestPlatformLang = GetLangFromSupportedLangCodes (mVariableModuleGlobal->PlatformLangCodes, Index, FALSE); BestPlatformLang = GetLangFromSupportedLangCodes (mVariableModuleGlobal->PlatformLangCodes, Index, FALSE);
//
// Calculate the needed variable size for PlatformLang variable.
//
VarNameSize = StrSize (EFI_PLATFORM_LANG_VARIABLE_NAME);
VarDataSize = AsciiStrSize (BestPlatformLang);
VariableEntry[0].VariableSize = sizeof (VARIABLE_HEADER) + VarNameSize + GET_PAD_SIZE (VarNameSize) + VarDataSize + GET_PAD_SIZE (VarDataSize);
VariableEntry[0].VariableSize = HEADER_ALIGN (VariableEntry[0].VariableSize);
VariableEntry[0].Guid = &gEfiGlobalVariableGuid;
VariableEntry[0].Name = EFI_PLATFORM_LANG_VARIABLE_NAME;
//
// Calculate the needed variable size for Lang variable.
//
VarNameSize = StrSize (EFI_LANG_VARIABLE_NAME);
VarDataSize = ISO_639_2_ENTRY_SIZE + 1;
VariableEntry[1].VariableSize = sizeof (VARIABLE_HEADER) + VarNameSize + GET_PAD_SIZE (VarNameSize) + VarDataSize + GET_PAD_SIZE (VarDataSize);
VariableEntry[1].VariableSize = HEADER_ALIGN (VariableEntry[1].VariableSize);
VariableEntry[1].Guid = &gEfiGlobalVariableGuid;
VariableEntry[1].Name = EFI_LANG_VARIABLE_NAME;
if (!CheckRemainingSpaceForConsistency (VARIABLE_ATTRIBUTE_NV_BS_RT, &VariableEntry[0], &VariableEntry[1], NULL)) {
//
// No enough variable space to set both PlatformLang and Lang successfully.
//
Status = EFI_OUT_OF_RESOURCES;
} else {
// //
// Successfully convert Lang to PlatformLang, and set the BestPlatformLang value into PlatformLang variable simultaneously. // Successfully convert Lang to PlatformLang, and set the BestPlatformLang value into PlatformLang variable simultaneously.
// //
@ -1702,13 +1869,21 @@ AutoUpdateLangVariable (
Status = UpdateVariable (EFI_PLATFORM_LANG_VARIABLE_NAME, &gEfiGlobalVariableGuid, BestPlatformLang, Status = UpdateVariable (EFI_PLATFORM_LANG_VARIABLE_NAME, &gEfiGlobalVariableGuid, BestPlatformLang,
AsciiStrSize (BestPlatformLang), Attributes, 0, 0, &Variable, NULL); AsciiStrSize (BestPlatformLang), Attributes, 0, 0, &Variable, NULL);
}
DEBUG ((EFI_D_INFO, "Variable Driver Auto Update Lang, Lang:%a, PlatformLang:%a Status: %r\n", BestLang, BestPlatformLang, Status)); DEBUG ((EFI_D_INFO, "Variable Driver Auto Update Lang, Lang:%a, PlatformLang:%a Status: %r\n", BestLang, BestPlatformLang, Status));
} }
} }
} }
if (SetLanguageCodes) {
//
// Continue to set PlatformLangCodes or LangCodes.
//
return EFI_SUCCESS;
} else {
return Status; return Status;
}
} }
/** /**
@ -2993,6 +3168,7 @@ VariableServiceSetVariable (
} }
} }
if (!FeaturePcdGet (PcdUefiVariableDefaultLangDeprecate)) {
// //
// Hook the operation of setting PlatformLangCodes/PlatformLang and LangCodes/Lang. // Hook the operation of setting PlatformLangCodes/PlatformLang and LangCodes/Lang.
// //
@ -3003,6 +3179,7 @@ VariableServiceSetVariable (
// //
goto Done; goto Done;
} }
}
// //
// Process PK, KEK, Sigdb seperately. // Process PK, KEK, Sigdb seperately.
@ -3053,14 +3230,12 @@ Done:
@param MaximumVariableSize Pointer to the maximum size of an individual EFI variables @param MaximumVariableSize Pointer to the maximum size of an individual EFI variables
associated with the attributes specified. associated with the attributes specified.
@return EFI_INVALID_PARAMETER An invalid combination of attribute bits was supplied.
@return EFI_SUCCESS Query successfully. @return EFI_SUCCESS Query successfully.
@return EFI_UNSUPPORTED The attribute is not supported on this platform.
**/ **/
EFI_STATUS EFI_STATUS
EFIAPI EFIAPI
VariableServiceQueryVariableInfo ( VariableServiceQueryVariableInfoInternal (
IN UINT32 Attributes, IN UINT32 Attributes,
OUT UINT64 *MaximumVariableStorageSize, OUT UINT64 *MaximumVariableStorageSize,
OUT UINT64 *RemainingVariableStorageSize, OUT UINT64 *RemainingVariableStorageSize,
@ -3073,38 +3248,12 @@ VariableServiceQueryVariableInfo (
VARIABLE_STORE_HEADER *VariableStoreHeader; VARIABLE_STORE_HEADER *VariableStoreHeader;
UINT64 CommonVariableTotalSize; UINT64 CommonVariableTotalSize;
UINT64 HwErrVariableTotalSize; UINT64 HwErrVariableTotalSize;
EFI_STATUS Status;
VARIABLE_POINTER_TRACK VariablePtrTrack;
CommonVariableTotalSize = 0; CommonVariableTotalSize = 0;
HwErrVariableTotalSize = 0; HwErrVariableTotalSize = 0;
if(MaximumVariableStorageSize == NULL || RemainingVariableStorageSize == NULL || MaximumVariableSize == NULL || Attributes == 0) {
return EFI_INVALID_PARAMETER;
}
if((Attributes & (EFI_VARIABLE_NON_VOLATILE | EFI_VARIABLE_BOOTSERVICE_ACCESS | EFI_VARIABLE_RUNTIME_ACCESS | EFI_VARIABLE_HARDWARE_ERROR_RECORD)) == 0) {
//
// Make sure the Attributes combination is supported by the platform.
//
return EFI_UNSUPPORTED;
} else if ((Attributes & (EFI_VARIABLE_RUNTIME_ACCESS | EFI_VARIABLE_BOOTSERVICE_ACCESS)) == EFI_VARIABLE_RUNTIME_ACCESS) {
//
// Make sure if runtime bit is set, boot service bit is set also.
//
return EFI_INVALID_PARAMETER;
} else if (AtRuntime () && ((Attributes & EFI_VARIABLE_RUNTIME_ACCESS) == 0)) {
//
// Make sure RT Attribute is set if we are in Runtime phase.
//
return EFI_INVALID_PARAMETER;
} else if ((Attributes & (EFI_VARIABLE_NON_VOLATILE | EFI_VARIABLE_HARDWARE_ERROR_RECORD)) == EFI_VARIABLE_HARDWARE_ERROR_RECORD) {
//
// Make sure Hw Attribute is set with NV.
//
return EFI_INVALID_PARAMETER;
}
AcquireLockOnlyAtBootTime(&mVariableModuleGlobal->VariableGlobal.VariableServicesLock);
if((Attributes & EFI_VARIABLE_NON_VOLATILE) == 0) { if((Attributes & EFI_VARIABLE_NON_VOLATILE) == 0) {
// //
// Query is Volatile related. // Query is Volatile related.
@ -3176,6 +3325,27 @@ VariableServiceQueryVariableInfo (
} else { } else {
CommonVariableTotalSize += VariableSize; CommonVariableTotalSize += VariableSize;
} }
} else if (Variable->State == (VAR_IN_DELETED_TRANSITION & VAR_ADDED)) {
//
// If it is a IN_DELETED_TRANSITION variable,
// and there is not also a same ADDED one at the same time,
// this IN_DELETED_TRANSITION variable is valid.
//
VariablePtrTrack.StartPtr = GetStartPointer (VariableStoreHeader);
VariablePtrTrack.EndPtr = GetEndPointer (VariableStoreHeader);
Status = FindVariableEx (
GetVariableNamePtr (Variable),
&Variable->VendorGuid,
FALSE,
&VariablePtrTrack
);
if (!EFI_ERROR (Status) && VariablePtrTrack.CurrPtr->State != VAR_ADDED) {
if ((Variable->Attributes & EFI_VARIABLE_HARDWARE_ERROR_RECORD) == EFI_VARIABLE_HARDWARE_ERROR_RECORD) {
HwErrVariableTotalSize += VariableSize;
} else {
CommonVariableTotalSize += VariableSize;
}
}
} }
} }
@ -3197,10 +3367,79 @@ VariableServiceQueryVariableInfo (
*MaximumVariableSize = *RemainingVariableStorageSize - sizeof (VARIABLE_HEADER); *MaximumVariableSize = *RemainingVariableStorageSize - sizeof (VARIABLE_HEADER);
} }
ReleaseLockOnlyAtBootTime (&mVariableModuleGlobal->VariableGlobal.VariableServicesLock);
return EFI_SUCCESS; return EFI_SUCCESS;
} }
/**
This code returns information about the EFI variables.
Caution: This function may receive untrusted input.
This function may be invoked in SMM mode. This function will do basic validation, before parse the data.
@param Attributes Attributes bitmask to specify the type of variables
on which to return information.
@param MaximumVariableStorageSize Pointer to the maximum size of the storage space available
for the EFI variables associated with the attributes specified.
@param RemainingVariableStorageSize Pointer to the remaining size of the storage space available
for EFI variables associated with the attributes specified.
@param MaximumVariableSize Pointer to the maximum size of an individual EFI variables
associated with the attributes specified.
@return EFI_INVALID_PARAMETER An invalid combination of attribute bits was supplied.
@return EFI_SUCCESS Query successfully.
@return EFI_UNSUPPORTED The attribute is not supported on this platform.
**/
EFI_STATUS
EFIAPI
VariableServiceQueryVariableInfo (
IN UINT32 Attributes,
OUT UINT64 *MaximumVariableStorageSize,
OUT UINT64 *RemainingVariableStorageSize,
OUT UINT64 *MaximumVariableSize
)
{
EFI_STATUS Status;
if(MaximumVariableStorageSize == NULL || RemainingVariableStorageSize == NULL || MaximumVariableSize == NULL || Attributes == 0) {
return EFI_INVALID_PARAMETER;
}
if((Attributes & (EFI_VARIABLE_NON_VOLATILE | EFI_VARIABLE_BOOTSERVICE_ACCESS | EFI_VARIABLE_RUNTIME_ACCESS | EFI_VARIABLE_HARDWARE_ERROR_RECORD)) == 0) {
//
// Make sure the Attributes combination is supported by the platform.
//
return EFI_UNSUPPORTED;
} else if ((Attributes & (EFI_VARIABLE_RUNTIME_ACCESS | EFI_VARIABLE_BOOTSERVICE_ACCESS)) == EFI_VARIABLE_RUNTIME_ACCESS) {
//
// Make sure if runtime bit is set, boot service bit is set also.
//
return EFI_INVALID_PARAMETER;
} else if (AtRuntime () && ((Attributes & EFI_VARIABLE_RUNTIME_ACCESS) == 0)) {
//
// Make sure RT Attribute is set if we are in Runtime phase.
//
return EFI_INVALID_PARAMETER;
} else if ((Attributes & (EFI_VARIABLE_NON_VOLATILE | EFI_VARIABLE_HARDWARE_ERROR_RECORD)) == EFI_VARIABLE_HARDWARE_ERROR_RECORD) {
//
// Make sure Hw Attribute is set with NV.
//
return EFI_INVALID_PARAMETER;
}
AcquireLockOnlyAtBootTime(&mVariableModuleGlobal->VariableGlobal.VariableServicesLock);
Status = VariableServiceQueryVariableInfoInternal (
Attributes,
MaximumVariableStorageSize,
RemainingVariableStorageSize,
MaximumVariableSize
);
ReleaseLockOnlyAtBootTime (&mVariableModuleGlobal->VariableGlobal.VariableServicesLock);
return Status;
}
/** /**
This function reclaims variable storage if free size is below the threshold. This function reclaims variable storage if free size is below the threshold.

40
SecurityPkg/VariableAuthenticated/RuntimeDxe/Variable.h
View File

@ -2,7 +2,7 @@
The internal header file includes the common header files, defines The internal header file includes the common header files, defines
internal structure and functions used by Variable modules. internal structure and functions used by Variable modules.
Copyright (c) 2009 - 2013, Intel Corporation. All rights reserved.<BR> Copyright (c) 2009 - 2014, Intel Corporation. All rights reserved.<BR>
This program and the accompanying materials This program and the accompanying materials
are licensed and made available under the terms and conditions of the BSD License are licensed and made available under the terms and conditions of the BSD License
which accompanies this distribution. The full text of the license may be found at which accompanies this distribution. The full text of the license may be found at
@ -111,10 +111,12 @@ typedef struct {
typedef struct { typedef struct {
EFI_GUID *Guid; EFI_GUID *Guid;
CHAR16 *Name; CHAR16 *Name;
UINT32 Attributes; // UINT32 Attributes;
UINTN DataSize; //
VOID *Data; // Variable size include variable header, name and data.
} VARIABLE_CACHE_ENTRY; //
UINTN VariableSize;
} VARIABLE_ENTRY_CONSISTENCY;
typedef struct { typedef struct {
EFI_GUID Guid; EFI_GUID Guid;
@ -564,6 +566,34 @@ VariableServiceSetVariable (
IN VOID *Data IN VOID *Data
); );
/**
This code returns information about the EFI variables.
Caution: This function may receive untrusted input.
This function may be invoked in SMM mode. This function will do basic validation, before parse the data.
@param Attributes Attributes bitmask to specify the type of variables
on which to return information.
@param MaximumVariableStorageSize Pointer to the maximum size of the storage space available
for the EFI variables associated with the attributes specified.
@param RemainingVariableStorageSize Pointer to the remaining size of the storage space available
for EFI variables associated with the attributes specified.
@param MaximumVariableSize Pointer to the maximum size of an individual EFI variables
associated with the attributes specified.
@return EFI_SUCCESS Query successfully.
**/
EFI_STATUS
EFIAPI
VariableServiceQueryVariableInfoInternal (
IN UINT32 Attributes,
OUT UINT64 *MaximumVariableStorageSize,
OUT UINT64 *RemainingVariableStorageSize,
OUT UINT64 *MaximumVariableSize
);
/** /**
This code returns information about the EFI variables. This code returns information about the EFI variables.

3
SecurityPkg/VariableAuthenticated/RuntimeDxe/VariableRuntimeDxe.inf
View File

@ -99,7 +99,8 @@
gEfiMdeModulePkgTokenSpaceGuid.PcdHwErrStorageSize gEfiMdeModulePkgTokenSpaceGuid.PcdHwErrStorageSize
[FeaturePcd] [FeaturePcd]
gEfiMdeModulePkgTokenSpaceGuid.PcdVariableCollectStatistics ## SOMETIME_CONSUMES (statistic the information of variable.) gEfiMdeModulePkgTokenSpaceGuid.PcdVariableCollectStatistics ## CONSUMES # statistic the information of variable.
gEfiMdePkgTokenSpaceGuid.PcdUefiVariableDefaultLangDeprecate ## CONSUMES
[Depex] [Depex]
TRUE TRUE

3
SecurityPkg/VariableAuthenticated/RuntimeDxe/VariableSmm.inf
View File

@ -102,7 +102,8 @@
gEfiMdeModulePkgTokenSpaceGuid.PcdHwErrStorageSize gEfiMdeModulePkgTokenSpaceGuid.PcdHwErrStorageSize
[FeaturePcd] [FeaturePcd]
gEfiMdeModulePkgTokenSpaceGuid.PcdVariableCollectStatistics ## SOMETIME_CONSUMES (statistic the information of variable.) gEfiMdeModulePkgTokenSpaceGuid.PcdVariableCollectStatistics ## CONSUMES # statistic the information of variable.
gEfiMdePkgTokenSpaceGuid.PcdUefiVariableDefaultLangDeprecate ## CONSUMES
[Depex] [Depex]
TRUE TRUE