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f0c8431568
Adds support in the OP-TEE drivers (both SMC and FF-A ABIs) to probe and use an RPMB device via the RPMB subsystem instead of passing the RPMB frames via tee-supplicant in user space. A fallback mechanism is kept to route RPMB frames via tee-supplicant if the RPMB subsystem isn't available. The OP-TEE RPC ABI is extended to support iterating over all RPMB devices until one is found with the expected RPMB key already programmed. Signed-off-by: Jens Wiklander <jens.wiklander@linaro.org> Tested-by: Manuel Traut <manut@mecka.net> Reviewed-by: Sumit Garg <sumit.garg@linaro.org> Link: https://lore.kernel.org/r/20240814153558.708365-5-jens.wiklander@linaro.org Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
15 lines
711 B
Text
15 lines
711 B
Text
What: /sys/class/tee/tee{,priv}X/rpmb_routing_model
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Date: May 2024
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KernelVersion: 6.10
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Contact: op-tee@lists.trustedfirmware.org
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Description:
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RPMB frames can be routed to the RPMB device via the
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user-space daemon tee-supplicant or the RPMB subsystem
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in the kernel. The value "user" means that the driver
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will route the RPMB frames via user space. Conversely,
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"kernel" means that the frames are routed via the RPMB
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subsystem without assistance from tee-supplicant. It
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should be assumed that RPMB frames are routed via user
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space if the variable is absent. The primary purpose
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of this variable is to let systemd know whether
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tee-supplicant is needed in the early boot with initramfs.
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