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| author | niruiyu <niruiyu@6f19259b-4bc3-4df7-8a09-765794883524> | 2013-05-17 03:49:35 +0000 |
|---|---|---|
| committer | niruiyu <niruiyu@6f19259b-4bc3-4df7-8a09-765794883524> | 2013-05-17 03:49:35 +0000 |
| commit | ff8438477f2dcea28149514de25368ac0b2c02ee (patch) | |
| tree | bd41d2b98e006420fce4c37c259c06e452bc9de5 /MdeModulePkg/Include | |
| parent | efffd9c17e63dde624373b0d374623ffe4770570 (diff) | |
| download | edk2-ff8438477f2dcea28149514de25368ac0b2c02ee.zip edk2-ff8438477f2dcea28149514de25368ac0b2c02ee.tar.gz edk2-ff8438477f2dcea28149514de25368ac0b2c02ee.tar.bz2 | |
Add EDKII_VARIABLE_LOCK_PROTOCOL and the implementation in MdeModulePkg variable drivers.
Add code in BdsDxe driver to call the protocol to mark the read-only variables defined in the UEFI Spec.
Signed-off-by: Ruiyu Ni <ruiyu.ni@intel.com>
Reviewed-by: Guo Dong <guo.dong@intel.com>
Reviewed-by: Star Zeng <star.zeng@intel.com>
git-svn-id: https://edk2.svn.sourceforge.net/svnroot/edk2/trunk/edk2@14372 6f19259b-4bc3-4df7-8a09-765794883524
Diffstat (limited to 'MdeModulePkg/Include')
| -rw-r--r-- | MdeModulePkg/Include/Guid/SmmVariableCommon.h | 6 | ||||
| -rw-r--r-- | MdeModulePkg/Include/Protocol/VariableLock.h | 63 |
2 files changed, 69 insertions, 0 deletions
diff --git a/MdeModulePkg/Include/Guid/SmmVariableCommon.h b/MdeModulePkg/Include/Guid/SmmVariableCommon.h index 478fd05..a2daae8 100644 --- a/MdeModulePkg/Include/Guid/SmmVariableCommon.h +++ b/MdeModulePkg/Include/Guid/SmmVariableCommon.h @@ -60,6 +60,10 @@ typedef struct { // is gEfiSmmVariableProtocolGuid.
//
#define SMM_VARIABLE_FUNCTION_GET_STATISTICS 7
+//
+// The payload for this function is SMM_VARIABLE_COMMUNICATE_LOCK_VARIABLE
+//
+#define SMM_VARIABLE_FUNCTION_LOCK_VARIABLE 8
///
/// Size of SMM communicate header, without including the payload.
@@ -101,4 +105,6 @@ typedef struct { UINT32 Attributes;
} SMM_VARIABLE_COMMUNICATE_QUERY_VARIABLE_INFO;
+typedef SMM_VARIABLE_COMMUNICATE_GET_NEXT_VARIABLE_NAME SMM_VARIABLE_COMMUNICATE_LOCK_VARIABLE;
+
#endif // _SMM_VARIABLE_COMMON_H_
\ No newline at end of file diff --git a/MdeModulePkg/Include/Protocol/VariableLock.h b/MdeModulePkg/Include/Protocol/VariableLock.h new file mode 100644 index 0000000..a2a73bc --- /dev/null +++ b/MdeModulePkg/Include/Protocol/VariableLock.h @@ -0,0 +1,63 @@ +/** @file
+ Variable Lock Protocol is related to EDK II-specific implementation of variables
+ and intended for use as a means to mark a variable read-only after the event
+ EFI_END_OF_DXE_EVENT_GUID is signaled.
+
+ Copyright (c) 2013, Intel Corporation. All rights reserved.<BR>
+ This program and the accompanying materials
+ 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
+ http://opensource.org/licenses/bsd-license.php
+
+ THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
+ WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
+
+**/
+
+#ifndef __VARIABLE_LOCK_H__
+#define __VARIABLE_LOCK_H__
+
+#define EDKII_VARIABLE_LOCK_PROTOCOL_GUID \
+ { \
+ 0xcd3d0a05, 0x9e24, 0x437c, { 0xa8, 0x91, 0x1e, 0xe0, 0x53, 0xdb, 0x76, 0x38 } \
+ }
+
+typedef struct _EDKII_VARIABLE_LOCK_PROTOCOL EDKII_VARIABLE_LOCK_PROTOCOL;
+
+/**
+ Mark a variable that will become read-only after leaving the DXE phase of execution.
+ Write request coming from SMM environment through EFI_SMM_VARIABLE_PROTOCOL is allowed.
+
+ @param[in] This The EDKII_VARIABLE_LOCK_PROTOCOL instance.
+ @param[in] VariableName A pointer to the variable name that will be made read-only subsequently.
+ @param[in] VendorGuid A pointer to the vendor GUID that will be made read-only subsequently.
+
+ @retval EFI_SUCCESS The variable specified by the VariableName and the VendorGuid was marked
+ as pending to be read-only.
+ @retval EFI_INVALID_PARAMETER VariableName or VendorGuid is NULL.
+ Or VariableName is an empty string.
+ @retval EFI_ACCESS_DENIED EFI_END_OF_DXE_EVENT_GROUP_GUID or EFI_EVENT_GROUP_READY_TO_BOOT has
+ already been signaled.
+ @retval EFI_OUT_OF_RESOURCES There is not enough resource to hold the lock request.
+**/
+typedef
+EFI_STATUS
+(EFIAPI * EDKII_VARIABLE_LOCK_PROTOCOL_REQUEST_TO_LOCK) (
+ IN CONST EDKII_VARIABLE_LOCK_PROTOCOL *This,
+ IN CHAR16 *VariableName,
+ IN EFI_GUID *VendorGuid
+ );
+
+///
+/// Variable Lock Protocol is related to EDK II-specific implementation of variables
+/// and intended for use as a means to mark a variable read-only after the event
+/// EFI_END_OF_DXE_EVENT_GUID is signaled.
+///
+struct _EDKII_VARIABLE_LOCK_PROTOCOL {
+ EDKII_VARIABLE_LOCK_PROTOCOL_REQUEST_TO_LOCK RequestToLock;
+};
+
+extern EFI_GUID gEdkiiVariableLockProtocolGuid;
+
+#endif
+
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