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Arm® recently announced the availability of the next version of the Arm® AMBA® 5 AXI Protocol Specification, AXI Issue K (AXI-K). This blog will explain some of the feature updates of the AMBA AXI-K specification:

• Memory Encryption Contexts (MEC), related to Realm Management Extensions (RME) that is part of AXI-J specification
• Additional updates:
  • An additional option to extend the Memory Partitioning and Performance Monitoring (MPAM) Partition ID (PARTID) field to 12-bit
  • An additional option for ‘simplified’ Memory Tagging Extension (MTE)
  • Provision to disable fixed type bursts
  • An option to relax ordering requirements between Device and normal non-cacheable requests
  • Issuing WriteNoSnpFull opcode without using shareable cache lines

Let us look at these features in detail:

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