Sure. Scenario #1:
MinPlatformPkg/PlatformInit/PlatformInitPei/PlatformInitPreMem.inf and MinPlatormPkg/PlatformInit/PlatformInitPei/PlatformInitPostMem.inf both link against an instance of BoardInitLib. Many boards link against a single BoardInitLib instance. See example - https://github.com/tianocore/edk2-platforms/blob/cd4e6b716c7d1bcde94035e7dce14b53a553e103/Platform/Intel/KabylakeOpenBoardPkg/KabylakeRvp3/OpenBoardPkg.dsc#L203 That BoardInitLib instance may link against SmmAccessLib. PlatformInitPreMem may wish to library class override the SmmAccessLib to the NULL instance while keeping it to non-NULL instance in PlatformInitPostMem. Scenario #2: A PEIM is built that checks whether the boot mode is S3. If so, it calls PeiInstallSmmAccessPpi(). A particular platform does not support S3, therefore, it links BaseSmmAccessLibNull as its library instance for SmmAccessLib. -=-=-=-=-=-=-=-=-=-=-=- Groups.io Links: You receive all messages sent to this group. View/Reply Online (#79228): https://edk2.groups.io/g/devel/message/79228 Mute This Topic: https://groups.io/mt/84769134/21656 Group Owner: devel+ow...@edk2.groups.io Unsubscribe: https://edk2.groups.io/g/devel/unsub [arch...@mail-archive.com] -=-=-=-=-=-=-=-=-=-=-=-
