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# SPDX-License-Identifier: GPL-2.0-only
# OP-TEE Trusted Execution Environment Configuration
config OPTEE
tristate "OP-TEE communication"
select HAVE_OPTEE
select ARM_SMCCC
depends on MMU
help
This driver implements bidirectional communication with the OP-TEE
Trusted Execution Environment (TEE). OP-TEE is a Trusted OS designed
primarily to rely on the ARM TrustZone(R) technology as the
underlying hardware isolation mechanism.
This driver can request services from OP-TEE, but doesn't
yet provide a supplicant to handle Remote Procedure Calls (RPC).
For more information see: https://www.op-tee.org
This driver doesn't actually load OP-TEE. For that see
CONFIG_BOOTM_OPTEE and PBL_OPTEE.
If unsure, say n here.
config OPTEE_DEVFS
bool "Provide /dev/tee0 interface"
depends on OPTEE && FS_DEVFS && EXPERIMENTAL
help
Userspace accesses OP-TEE via ioctls and mmaps of the /dev/tee0
device. This are no current in-tree users of this interface,
but it's useful for compiling libteeclient + optee_tests for
use inside barebox to verify proper operation of CONFIG_OPTEE.
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