userspace dmabuf misc driver

modulename: udmabuf.ko

configname: CONFIG_UDMABUF

Linux Kernel Configuration
└─>Device Drivers
└─>DMABUF options
└─>userspace dmabuf misc driver
In linux kernel since version 3.10 (release Date: 2013-06-30)
A driver to let userspace turn memfd regions into dma-bufs.
Qemu can use this to create host dmabufs for guest framebuffers.
source code:
drivers/dma-buf/udmabuf.c