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Current implemenation sets PM1_CNT.SCI_EN bit at ReadyToBoot event. However, this should not be done because this causes OS to skip triggering FADT.SMI_CMD, which leads to the functions implemented in the SMI handler being omitted. This issue was identified by Matt Delco <delco@google.com>. The fix does the following: - The SCI_EN bit setting is removed from CbSupportDxe driver. - Some additional checks are added in CbParseFadtInfo() in CbParseLib.c to output some error message and ASSERT (FALSE) if ALL of the following conditions are met: 1) HARDWARE_REDUCED_ACPI is not set; 2) SMI_CMD field is zero; 3) SCI_EN bit is zero; which indicates the ACPI enabling status is inconsistent: SCI is not enabled but the ACPI table does not provide a means to enable it through FADT->SMI_CMD. This may cause issues in OS. Cc: Maurice Ma <maurice.ma@intel.com> Cc: Prince Agyeman <prince.agyeman@intel.com> Cc: Matt Delco <delco@google.com> Contributed-under: TianoCore Contribution Agreement 1.0 Signed-off-by: Benjamin You <benjamin.you@intel.com> Reviewed-by: Maurice Ma <maurice.ma@intel.com> Reviewed-by: Matt Delco <delco@google.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.