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| author | Star Zeng <star.zeng@intel.com> | 2013-07-03 09:08:40 +0000 |
|---|---|---|
| committer | lzeng14 <lzeng14@6f19259b-4bc3-4df7-8a09-765794883524> | 2013-07-03 09:08:40 +0000 |
| commit | 3e02ebb2bbe0fd4da880511b1f35951e1c4b8404 (patch) | |
| tree | 95fc155e9d76e163cd295db373734cc276f4abc6 /MdeModulePkg/Universal/FaultTolerantWriteDxe/FaultTolerantWriteDxe.inf | |
| parent | 70066a82a54bd5136556dff3ea76dff035a3aca3 (diff) | |
| download | edk2-3e02ebb2bbe0fd4da880511b1f35951e1c4b8404.zip edk2-3e02ebb2bbe0fd4da880511b1f35951e1c4b8404.tar.gz edk2-3e02ebb2bbe0fd4da880511b1f35951e1c4b8404.tar.bz2 | |
MdeModulePkg: Variable drivers robustly handle crashes during Reclaim().
PEI variable implementation checks only the variable header signature for validity. This does not seem robust if system crash occurred during previous Reclaim() operation. If the crash occurred while FTW was rewriting the variable FV, the signature could be valid even though the rest of the FV isn't valid.
Solution: Add a FaultTolerantWritePei driver to check and provide the FTW last write status, then PEI variable and early phase(before FTW protocol ready) of DXE variable can check the status and determine if all or partial variable data has been backed up in spare block, and then use the backed up data.
Contributed-under: TianoCore Contribution Agreement 1.0
Signed-off-by: Star Zeng <star.zeng@intel.com>
Reviewed-by: Liming Gao <liming.gao@intel.com>
git-svn-id: https://svn.code.sf.net/p/edk2/code/trunk/edk2@14454 6f19259b-4bc3-4df7-8a09-765794883524
Diffstat (limited to 'MdeModulePkg/Universal/FaultTolerantWriteDxe/FaultTolerantWriteDxe.inf')
| -rw-r--r-- | MdeModulePkg/Universal/FaultTolerantWriteDxe/FaultTolerantWriteDxe.inf | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/MdeModulePkg/Universal/FaultTolerantWriteDxe/FaultTolerantWriteDxe.inf b/MdeModulePkg/Universal/FaultTolerantWriteDxe/FaultTolerantWriteDxe.inf index f60ab28..3d4b912 100644 --- a/MdeModulePkg/Universal/FaultTolerantWriteDxe/FaultTolerantWriteDxe.inf +++ b/MdeModulePkg/Universal/FaultTolerantWriteDxe/FaultTolerantWriteDxe.inf @@ -3,7 +3,7 @@ # which provides fault tolerant write capability for block devices.
# Its implementation depends on the full functionality FVB protocol that support read, write/erase flash access.
#
-# Copyright (c) 2006 - 2012, Intel Corporation. All rights reserved.<BR>
+# Copyright (c) 2006 - 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
@@ -49,7 +49,7 @@ PcdLib
[Guids]
- gEfiSystemNvDataFvGuid ## CONSUMES ## FV Signature of Working Space Header
+ gEdkiiWorkingBlockSignatureGuid ## CONSUMES ## FV Signature of Working Space Header
[Protocols]
gEfiSwapAddressRangeProtocolGuid | gEfiMdeModulePkgTokenSpaceGuid.PcdFullFtwServiceEnable ## CONSUMES
|