Failed to run BIOS UEFI service StartupAllAPs()
We invoked an UEFI service (MP_SERVICE) to bring up the multicore (APs) and found that the EFI_MP_SERVICES_PROTOCOL.StartupAllAPs() failed to execute in Non-Blocking mode. We followed the “PI Spec(1.6) Vol2. Chapter 13.4 MP Services Protocol” to startup our APs in Non-Blocking mode. While on UP2 board, it failed to execute in Non-Blocking mode, BSP is always waiting for APs to complete their work (like a blocking mode instead). It seems a bug of the BIOS. The latest BIOS version also has the issue.