Tcg platform libaray

[changab]

Description

Introduce a platform-level library that facilitates the platform-specific implementation to provide and initiate TCG event log area with the event logs created before PEI phase. In AMD use case, we have the TCG event log before the X86 phase.

• [X ] Breaking change?

  • Breaking change - Will this cause a break in build or boot behavior? The platform may be built failed as TcgDxe has a dependency with DxePlatformTcgEventLogLib. Currently, only Intel Quark and Vlv2TbltDevice have the reference of TcgDxe under edk2-platforms. However, these two platforms can not be built successfully even without the changes provided in this PR. I think these two platforms are not in maintenance. We can merge this PR with the approval and go back to update the DSC files of Intel platforms on edk2-platforms.

• [ ] Impacts security? No

• [ ] Includes tests? Tested on AMD server platform

How This Was Tested

Tested on AMD server platform

Integration Instructions

A NULL instance is provided for the platform if they don't have the platform-specific implementation on TCG event log. Platform-level implementation is provided if the platform has its own TCG event log before PEI phase.

[jyao1]

Adding additional dependency will break all existing platforms.

This issue can be easily resolved by creating TCG2 EventLog HOB in PEI phase.

Intel platform just uses additional EventLog HOB for measurement done by Intel Boot Guard ACM.

[github-actions[bot]]

This PR has been automatically marked as stale because it has not had activity in 60 days. It will be closed if no further activity occurs within 7 days. Thank you for your contributions.

[github-actions[bot]]

This pull request has been automatically been closed because it did not have any activity in 60 days and no follow up within 7 days after being marked stale. Thank you for your contributions.