CONFIG_INFINIBAND_VIRT_DMA (not configurable)

configname: CONFIG_INFINIBAND_VIRT_DMA

Linux Kernel Configuration
└─>Device Drivers
└─>InfiniBand support
└─>INFINIBAND_VIRT_DMA
In linux kernel since version 5.1 (release Date: 2019-05-05)  

is selected by
CONFIG_RDMA_RXE