Apparatus and method for page walk extension for enhanced security checks

摘要

An apparatus and method for managing a protection table by a processor. For example, a processor according to one embodiment of the invention comprises: protection table management logic to manage a protection table, the protection table having an entry for each protected page or each group of protected pages in memory; wherein the protection table management logic prevents direct access to the protection table by user application program code and operating system program code but permits direct access by the processor.

主权项

1. A processor comprising:
protection table management logic to manage a protection table, the protection table having one entry for each protected page or each group of protected pages in a memory; wherein entries in the protection table contain permission information indicating that a particular protected page cannot be accessed in a certain manner, and wherein the protection table management logic prevents direct access to the protection table by user application program code and operating system program code but permits direct access by the processor, wherein the direct access by the processor includes loading data from the protection table into a dedicated register accessible only by the processor.