Not all of the Z87 motherboards require patching. For example, my new ASUS Z87-WS, my friends Asus Maximus VI GENE, do NOT require a patch. PM works on the factory BIOS. Before anyone starts to complain that he can not upload a converted BIOS for Z87, let them first examine whether he needs to do the patch.
Unfortunately, there are still mainboards with locked msr register, such as the MSI Z87-G43.
PM on the Z87 works differently. AICPM is not loaded, but the kernel deals with the PM. If you have to restart immediately after booting the kernel, then locked register msr is the cause and BIOS needs to patch.