http://doc.qt.io/QtForDeviceCreation/qtee-supported-platforms.html#minimum-hardware-requirements
http://blog.qt.io/blog/2018/05/03/qt-microncontrollers-mcu/
PS: I wonder when the Qt project will pick up the UEFI ports done by EFIDroid:
https://firmwaresecurity.com/2017/11/25/qtbase-efidroid-port-of-qt-to-uefi/