Method to manage graphics address remap table (GART) translations in a secure system

摘要

intercepted in order to determine if the modification will result in an aperture memory address mapping to a region of trusted memory. If it is determined that the GART modification will not result in a mapping to a portion of trusted memory, then the GART modification is allowed. If it is determined that the GART modification will result in a mapping to a portion of trusted memory, then the modification is not allowed and an alarm is raised in the system.