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| author | Sumit Garg <sumit.garg@linaro.org> | 2023-11-02 13:00:55 +0530 |
|---|---|---|
| committer | Jens Wiklander <jens.wiklander@linaro.org> | 2023-11-03 09:27:20 +0100 |
| commit | 7269cba53d906cf257c139d3b3a53ad272176bca (patch) | |
| tree | c9ab1b4575e5cbd97667360925b12925af8d6789 /Documentation/ABI | |
| parent | ffc253263a1375a65fa6c9f62a893e9767fbebfa (diff) | |
| download | linux-7269cba53d906cf257c139d3b3a53ad272176bca.tar.gz | |
tee: optee: Fix supplicant based device enumeration
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: 5f178bb71e3a ("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>
Diffstat (limited to 'Documentation/ABI')
| -rw-r--r-- | Documentation/ABI/testing/sysfs-bus-optee-devices | 9 |
1 files changed, 9 insertions, 0 deletions
diff --git a/Documentation/ABI/testing/sysfs-bus-optee-devices b/Documentation/ABI/testing/sysfs-bus-optee-devices index 0f58701367b66..af31e5a22d89f 100644 --- a/Documentation/ABI/testing/sysfs-bus-optee-devices +++ b/Documentation/ABI/testing/sysfs-bus-optee-devices @@ -6,3 +6,12 @@ Description: OP-TEE bus provides reference to registered drivers under this directory. The <uuid> matches Trusted Application (TA) driver and corresponding TA in secure OS. Drivers are free to create needed API under optee-ta-<uuid> directory. + +What: /sys/bus/tee/devices/optee-ta-<uuid>/need_supplicant +Date: November 2023 +KernelVersion: 6.7 +Contact: op-tee@lists.trustedfirmware.org +Description: + Allows to distinguish whether an OP-TEE based TA/device requires user-space + tee-supplicant to function properly or not. This attribute will be present for + devices which depend on tee-supplicant to be running. |