This repo holds the work area and revisions of the non-ISA specification created by the RISC-V AP-TEE TG. This specification defines the programming interfaces (ABI) to support the Confidential VM Extension (CoVE) confidential computing architecture for RISC-V application-processor platforms.
Reference: link
Isn't the tvm-identity also represented as optional in Fig 19 above? Also described as optional in the paragraph "TVM Identity Claim" below