TDA4VM: How to boot MCU1_1(locked step mode)[SDK8.0 RTOS+QNX]

Hi Experts,
We want to do the full-load test on all cores in Main and MCU domain on QNX, so,

We followed TI's documents and some e2e questions, mcu1_0,mcu2_0,mcu2_1,mcu3_0,mcu3_1 can boot successfully.
but how to boot mcu1_1?

The vision_apps_build_flags.mak says that:

# Since MCU R5F runs in locked step mode in vision apps, dont set these to 'yes'
BUILD_CPU_MCU1_1?=no

Thanks,
Jianqiang