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edd3183c5c
Prevent build error when CONFIG_RPMB=m and CONFIG_OPTEE=y by adding a
dependency to CONFIG_RPMB for CONFIG_OPTEE so the RPMB subsystem always
is reachable if configured. This means that CONFIG_OPTEE automatically
becomes compiled as a module if CONFIG_RPMB is compiled as a module. If
CONFIG_RPMB isn't configured or is configured as built-in, CONFIG_OPTEE
will remain unchanged.
Reported-by: kernel test robot <lkp@intel.com>
Closes: https://lore.kernel.org/oe-kbuild-all/202409021448.RSvcBPzt-lkp@intel.com/
Fixes: f0c8431568 ("optee: probe RPMB device using RPMB subsystem")
Signed-off-by: Jens Wiklander <jens.wiklander@linaro.org>
Link: https://lore.kernel.org/r/20240902151231.3705204-2-jens.wiklander@linaro.org
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
28 lines
1.0 KiB
Plaintext
28 lines
1.0 KiB
Plaintext
# SPDX-License-Identifier: GPL-2.0-only
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# OP-TEE Trusted Execution Environment Configuration
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config OPTEE
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tristate "OP-TEE"
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depends on HAVE_ARM_SMCCC
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depends on MMU
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depends on RPMB || !RPMB
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help
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This implements the OP-TEE Trusted Execution Environment (TEE)
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driver.
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config OPTEE_INSECURE_LOAD_IMAGE
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bool "Load OP-TEE image as firmware"
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default n
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depends on OPTEE && ARM64
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help
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This loads the BL32 image for OP-TEE as firmware when the driver is
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probed. This returns -EPROBE_DEFER until the firmware is loadable from
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the filesystem which is determined by checking the system_state until
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it is in SYSTEM_RUNNING. This also requires enabling the corresponding
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option in Trusted Firmware for Arm. The documentation there explains
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the security threat associated with enabling this as well as
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mitigations at the firmware and platform level.
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https://trustedfirmware-a.readthedocs.io/en/latest/threat_model/threat_model.html
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Additional documentation on kernel security risks are at
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Documentation/tee/op-tee.rst.
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