CONFIG_DMA_OPS (not configurable)

modulename: ops_helpers.ko

and/or

dummy.ko

configname: CONFIG_DMA_OPS

Linux Kernel Configuration
└─>Library routines
└─>DMA_OPS
In linux kernel since version 4.14.326 (release Date: 2023-09-23)  
source code:
kernel/dma/ops_helpers.c
depends
CONFIG_HAS_DMA

is depended by
CONFIG_VDPA_SIM