If PI SMM IPL will be dispatched before the CPU AP is installed for a platform, the platform developer is expected to set cache-ability of SMRAM to WB earlier to improve performance of SMM initialization. git-svn-id: https://edk2.svn.sourceforge.net/svnroot/edk2/trunk/edk2@10998 6f19259b-4bc3-4df7-8a09-765794883524