Re: [meta-arm] [PATCH v3 2/2] trusted-service: remove optee udev and group settings

Hi,

On Thu, Oct 17, 2024 at 08:17:32AM +0000, Gyorgy Szing wrote:
> How is the system going to work if op-tee client is not deployed, but libts is? E.g. if the SPMC is Hafnium and no S-EL1 OP-TEE SP is needed, but the FWU SP is used?

If optee-client is not installed, then optee is not functional
in Linux userspace and rootfs so optee-test fails. The plain
kernel driver for optee will work and /dev/tee* and /dev/teepriv* interfaces
will pop up with root access rights, but not with the setup expected by
tee-supplicant systemd service file from optee-client. This may be enough for TS
use cases.

In the firmware side, optee services are not affected.

If this impacts libts users, then IMO they need to install optee-client or
setup the udev rules etc in some other way.

Is there some problem I missed or a setup which is not covered in meta-arm testing?

Cheers,

-Mikko