I build AOSP+OPTEE using https://github.com/bsupiot/hikey960-aosp-optee/wiki , and run android successfully, but I couldn’t find way to run xtest.
The kernel driver are already there–/dev/tee0，/dev/teepriv0；
dmesg | grep tee
[ 6.442064] optee: probing for conduit method from DT.
[ 6.450743] optee: initialized driver
And when I ran tee-supplicant&, the information is listed below.
/system/bin/sh: tee-supplicant: not found