Regarding HMM

[Valmiki <valmikibow@xxxxxxxxx>]

Hi All,

Im trying to understand heterogeneous memory management, i have 
following doubts.
If HMM is being used we dont have to use DMA controller on device for 
memory transfers ?
Without DMA if software is managing page faults and migrations, will 
there be any performance impacts ?
Is HMM targeted for any specific use cases where DMA controller is not 
there on device ?
Regards,
Valmiki