1.. SPDX-License-Identifier: GPL-2.0
 2
 3===================================
 4TEE (Trusted Execution Environment)
 5===================================
 6
 7This document describes the TEE subsystem in Linux.
 8
 9Overview
10========
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 driver
14handles the details needed to communicate with the TEE.
15
16This subsystem deals with:
17
18- Registration of TEE drivers
19
20- Managing shared memory between Linux and the TEE
21
22- Providing a generic API to the TEE