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Explanation from Michael Kinney: This PCD allows a platform to provide PlatformSmmBspElection() in a platform specific SmmCpuPlatformHookLib instance to decide which CPU gets elected to be the BSP in each SMI. The SmmCpuPlatformHookLibNull [instance] always returns EFI_NOT_READY for that function, which makes the module behave the same as the PCD being set to FALSE. The default is TRUE, so the platform lib is always called, so a platform developer can implement the hook function and does not have to also change a PCD setting for the hook function to be active. A platform that wants to eliminate the call to the hook function [altogether] can set the PCD to FALSE. So for OVMF, I think it makes sense to set this PCD to FALSE in the DSC file. Suggested-by: Michael Kinney <michael.d.kinney@intel.com> Contributed-under: TianoCore Contribution Agreement 1.0 Signed-off-by: Laszlo Ersek <lersek@redhat.com> Reviewed-by: Jordan Justen <jordan.l.justen@intel.com> git-svn-id: https://svn.code.sf.net/p/edk2/code/trunk/edk2@19053 6f19259b-4bc3-4df7-8a09-765794883524