| # SPDX-License-Identifier: GPL-2.0-only | |
| # OP-TEE Trusted Execution Environment Configuration | |
| config OPTEE | |
| tristate "OP-TEE" | |
| depends on HAVE_ARM_SMCCC | |
| depends on MMU | |
| depends on RPMB || !RPMB | |
| help | |
| This implements the OP-TEE Trusted Execution Environment (TEE) | |
| driver. | |
| config OPTEE_INSECURE_LOAD_IMAGE | |
| bool "Load OP-TEE image as firmware" | |
| default n | |
| depends on OPTEE && ARM64 | |
| help | |
| This loads the BL32 image for OP-TEE as firmware when the driver is | |
| probed. This returns -EPROBE_DEFER until the firmware is loadable from | |
| the filesystem which is determined by checking the system_state until | |
| it is in SYSTEM_RUNNING. This also requires enabling the corresponding | |
| option in Trusted Firmware for Arm. The documentation there explains | |
| the security threat associated with enabling this as well as | |
| mitigations at the firmware and platform level. | |
| https://trustedfirmware-a.readthedocs.io/en/latest/threat_model/threat_model.html | |
| Additional documentation on kernel security risks are at | |
| Documentation/tee/op-tee.rst. | |
| config OPTEE_STATIC_PROTMEM_POOL | |
| bool | |
| depends on HAS_IOMEM && TEE_DMABUF_HEAPS | |
| default y |