default or selected kernelversion does not have config value CONFIG_HMM.
Result is shown for kernelversion 6.9.5

CONFIG_HMM (not configurable)

modulename: hmm.ko

configname: CONFIG_HMM

Linux Kernel Configuration
└─>Memory Management options
└─>HMM
In linux kernel since version 3.10 (release Date: 2013-06-30)  
source code:
mm/hmm.c