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Currently supplicant dependent optee device enumeration only registers
devices whenever tee-supplicant is invoked for the first time. But it
forgets to remove devices when tee-supplicant daemon stops running and
closes its context gracefully. This leads to following error for fTPM
driver during reboot/shutdown:
[ 73.466791] tpm tpm0: ftpm_tee_tpm_op_send: SUBMIT_COMMAND invoke error: 0xffff3024
Fix this by adding an attribute for supplicant dependent devices so that
the user-space service can detect and detach supplicant devices before
closing the supplicant:
$ for dev in /sys/bus/tee/devices/*; do if [[ -f "$dev/need_supplicant" && -f "$dev/driver/unbind" ]]; \
then echo $(basename "$dev") > $dev/driver/unbind; fi done
Reported-by: Jan Kiszka <jan.kiszka@siemens.com>
Closes: https://github.com/OP-TEE/optee_os/issues/6094
Fixes: 5f178bb71e ("optee: enable support for multi-stage bus enumeration")
Signed-off-by: Sumit Garg <sumit.garg@linaro.org>
Reviewed-by: Ilias Apalodimas <ilias.apalodimas@linaro.org>
Acked-by: Jerome Forissier <jerome.forissier@linaro.org>
[jw: fixed up Date documentation]
Signed-off-by: Jens Wiklander <jens.wiklander@linaro.org>
18 lines
760 B
Plaintext
18 lines
760 B
Plaintext
What: /sys/bus/tee/devices/optee-ta-<uuid>/
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Date: May 2020
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KernelVersion 5.8
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Contact: op-tee@lists.trustedfirmware.org
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Description:
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OP-TEE bus provides reference to registered drivers under this directory. The <uuid>
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matches Trusted Application (TA) driver and corresponding TA in secure OS. Drivers
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are free to create needed API under optee-ta-<uuid> directory.
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What: /sys/bus/tee/devices/optee-ta-<uuid>/need_supplicant
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Date: November 2023
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KernelVersion: 6.7
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Contact: op-tee@lists.trustedfirmware.org
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Description:
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Allows to distinguish whether an OP-TEE based TA/device requires user-space
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tee-supplicant to function properly or not. This attribute will be present for
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devices which depend on tee-supplicant to be running.
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