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SecurityPkg Variable: Remove mStorageData buffer allocation and use Scratch buffer instead to reduce SMRAM consumption.

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It can reduce MAX (PcdGet32 (PcdMaxVariableSize), PcdGet32 (PcdMaxHardwareErrorVariableSize)) size of SMRAM consumption.

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

git-svn-id: https://svn.code.sf.net/p/edk2/code/trunk/edk2@14855 6f19259b-4bc3-4df7-8a09-765794883524
This commit is contained in:
Star Zeng
2013-11-18 02:56:04 +00:00
committed by lzeng14
parent e82edcf914
commit fddbbc661e
4 changed files with 40 additions and 48 deletions
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16
SecurityPkg/VariableAuthenticated/RuntimeDxe/AuthService.c
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@@ -48,14 +48,6 @@ CONST UINT8 mRsaE[] = { 0x01, 0x00, 0x01 };
//
VOID *mHashCtx = NULL;
//
// Pointer to runtime buffer.
// For "Append" operation to an existing variable, a read/modify/write operation
// is supported by firmware internally. Reserve runtime buffer to cache previous
// variable data in runtime phase because memory allocation is forbidden in virtual mode.
//
VOID *mStorageArea = NULL;
//
// The serialization of the values of the VariableName, VendorGuid and Attributes
// parameters of the SetVariable() call and the TimeStamp component of the
@@ -191,14 +183,6 @@ AutenticatedVariableServiceInitialize (
return EFI_OUT_OF_RESOURCES;
}
//
// Reserved runtime buffer for "Append" operation in virtual mode.
//
mStorageArea = AllocateRuntimePool (MAX (PcdGet32 (PcdMaxVariableSize), PcdGet32 (PcdMaxHardwareErrorVariableSize)));
if (mStorageArea == NULL) {
return EFI_OUT_OF_RESOURCES;
}
//
// Prepare runtime buffer for serialized data of time-based authenticated
// Variable, i.e. (VariableName, VendorGuid, Attributes, TimeStamp, Data).