This repo holds the work area and revisions of the RISC-V AP-TEEI specification. This specification defines the programming interfaces (ABI) to support a scalable confidential compute architecture for RISC-V application-processor platforms. The RISC-V AP-TEE Interface is used by OS/VMMs to enable scalable hosting of confidential virtual machines, applications and other workloads where the hosting software, infrastructure, developers and operators are considered outside the Trusted Computing Base (TCB).