Hi Eric Li
Hope You are Doing Well
First Make Clear IPCF and LLCE both are different things. If you want to Send Massage From A core to M Core, IPCF is used. Inter-Platform Communication Framework (IPCF) is a subsystem which enables applications, running on multiple homogenous or heterogenous processing cores, located on the same chip or different chips, running on different operating systems.
While LLCE does not make Inter-Platform Communication on cores like A to M core. Please read Application Note or Product brief of ipcf and llce.
Regards ,
Tushar