Padding on Optee + AES Block Cyphers

Dear Op-Tee support team,

Required some expert opinion - Could you please confirm whether AES block cyphers (ECB and CBC mode) support non-block aligned input for cryption ?

My Use case as below App (say input buffer as 17 bytes) -> OpTee (CA + TA) -> HSM.

In the above mentioned case, Does Op-Tee can take care the input buffer with any size or does it expect block-size aligned input buffer ? In which layer does the padding recommended ? Could you please provide any suggestions / links ?

Thanks & Regards, Hareesh