Method For Tagging Control Information Associated With A Physical Address, Processing System And Device

A processing system, configured to:

• send a service request to another processing system;
• receive a hardware tag allocated by said another processing system, the hardware tag being invisible to a software system in the processing system;
• join the hardware tag with a physical address to form a compound physical address, the hardware tag including M bits carried by a dedicated hardware tag control line, the physical address including N bits carried by a physical address bus, M and N being positive integers, wherein the hardware tag does not occupy the physical address bus;
• and
• access a storage space corresponding to the hardware tag by using the hardware tag in the compound physical address.

A processing system, configured to:

• receive a service request from another processing system;
• set a unique hardware tag corresponding to said another processing system, the hardware tag being invisible to a software system in the processing system;
• and
• tag control information with the hardware tag, the control information being configured as a unique encryption key of a storage space accessible by said another processing system, wherein the tag control information with the hardware tag joins the hardware tag with a physical address to form a compound physical address, the hardware tag including M bits carried by a dedicated hardware tag control line, the physical address including N bits carried by a physical address bus, M and N being positive integers, wherein the hardware tag does not occupy the physical address bus.