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REF: https://bugzilla.tianocore.org/show_bug.cgi?id=1272 To have high confidence in usage for platform, add option (BIT2 of PcdVTdPolicyPropertyMask) to force no IOMMU access attribute request recording before DMAR table is installed. Check PcdVTdPolicyPropertyMask BIT2 before RequestAccessAttribute() and ProcessRequestedAccessAttribute(), then RequestAccessAttribute(), ProcessRequestedAccessAttribute() and mAccessRequestXXX variables could be optimized by compiler when PcdVTdPolicyPropertyMask BIT2 = 1. Test done: 1: Created case that has IOMMU access attribute request before DMAR table is installed, ASSERT was triggered after setting PcdVTdPolicyPropertyMask BIT2 to 1. 2. Confirmed RequestAccessAttribute(), ProcessRequestedAccessAttribute() and mAccessRequestXXX variables were optimized by compiler after setting PcdVTdPolicyPropertyMask BIT2 to 1. Cc: Jiewen Yao <jiewen.yao@intel.com> Cc: Rangasai V Chaganty <rangasai.v.chaganty@intel.com> Contributed-under: TianoCore Contribution Agreement 1.1 Signed-off-by: Star Zeng <star.zeng@intel.com> Reviewed-by: Jiewen Yao <jiewen.yao@intel.com>
EDK II Project
A modern, feature-rich, cross-platform firmware development environment for the UEFI and PI specifications from www.uefi.org.
Contributions to the EDK II open source project are covered by the TianoCore Contribution Agreement 1.1
The majority of the content in the EDK II open source project uses a BSD 2-Clause License. The EDK II open source project contains the following components that are covered by additional licenses:
- AppPkg/Applications/Python/Python-2.7.2/Tools/pybench
- AppPkg/Applications/Python/Python-2.7.2
- AppPkg/Applications/Python/Python-2.7.10
- BaseTools/Source/C/BrotliCompress
- MdeModulePkg/Library/BrotliCustomDecompressLib
- OvmfPkg
- CryptoPkg/Library/OpensslLib/openssl
The EDK II Project is composed of packages. The maintainers for each package are listed in Maintainers.txt.