CONFIG_INTEL_IDXD_BUS (not configurable)

modulename: idxd_bus.ko

configname: CONFIG_INTEL_IDXD_BUS

Linux Kernel Configuration
└─>Device Drivers
└─>DMA Engine support
└─>INTEL_IDXD_BUS
In linux kernel since version 5.2 (release Date: 2019-07-07)  
source code:
drivers/dma/idxd/

is depended by
CONFIG_INTEL_IDXD_COMPAT