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1.. SPDX-License-Identifier: GPL-2.02 3===================================4TEE (Trusted Execution Environment)5===================================6 7This document describes the TEE subsystem in Linux.8 9Overview10========11 12A TEE is a trusted OS running in some secure environment, for example,13TrustZone on ARM CPUs, or a separate secure co-processor etc. A TEE driver14handles the details needed to communicate with the TEE.15 16This subsystem deals with:17 18- Registration of TEE drivers19 20- Managing shared memory between Linux and the TEE21 22- Providing a generic API to the TEE23