SECURE MEMORY CONTROL PARAMETERS IN TABLE LOOK ASIDE BUFFER DATA FIELDS AND SUPPORT MEMORY ARRAY

摘要

Techniques and apparatus for utilizing bits in a translation look aside buffer (TLB) table to identify and access security parameters to be used in securely accessing data are provided. Any type of bits in the TLB may be used, such as excess bits in a translated address, excess attribute bits, or special purpose bits added specifically for security purposes. In some cases, the security parameters may include an index into a key table for use in retrieving a set of one or more keys to use for encryption and/or decryption.

主权项

1. A security-enabled system on chip (SOC) for processing secure data stored, in an encrypted form in external memory, comprising:
one or more processing cores; a security parameters table having entries, each containing a set of one or more security parameters for use in securely accessing a corresponding block of data; a translation look aside buffer (TLB) having entries, each containing a translated real address for a corresponding virtual address contained in a memory access request; and a security mechanism configured to securely access data targeted by memory access requests using security parameters from an entry in the security parameters table retrieved using an index obtained from an entry in the TLB.