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"MdeModulePkg/Core/PiSmmCore/PiSmmIpl.inf" (a DXE_RUNTIME_DRIVER) implements the SMM Initial Program Loader. It produces EFI_SMM_BASE2_PROTOCOL and EFI_SMM_COMMUNICATION_PROTOCOL, relying on: - EFI_SMM_ACCESS2_PROTOCOL (provided by OvmfPkg/SmmAccess/SmmAccess2Dxe.inf), - EFI_SMM_CONTROL2_PROTOCOL (provided by OvmfPkg/SmmControl2Dxe/SmmControl2Dxe.inf). (The SMM IPL also depends on EFI_SMM_CONFIGURATION_PROTOCOL_GUID, but this dependency is not enforced in the entry point. A protocol notify callback is registered instead, hence we can delay providing that protocol via the PiSmmCpuDxeSmm driver that is (to be) imported from UefiCpuPkg/.) The SMM IPL loads the SMM core into SMRAM and executes it from there. Therefore we add the SMM core to the build as well. For the SMM core, a number of library classes need to be resolved. Furthermore, each FDF file must provide the GenFds.py BaseTools utility with a build rule for SMM_CORE; we copy the DXE_CORE's rule. 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@19043 6f19259b-4bc3-4df7-8a09-765794883524