ACPI Heterogeneous Memory Attribute Table Support

modulename: hmat.ko

configname: CONFIG_ACPI_HMAT

Linux Kernel Configuration
└─>Power management and ACPI options
└─>ACPI (Advanced Configuration and Power Interface) Support
└─>ACPI Heterogeneous Memory Attribute Table Support
In linux kernel since version 4.14.326 (release Date: 2023-09-23)  
If set, this option has the kernel parse and report the
platform's ACPI HMAT (Heterogeneous Memory Attributes Table),
register memory initiators with their targets, and export
performance attributes through the node's sysfs device if
provided.

source code: