Kconfig

 1config DMABUF_HEAPS_SYSTEM
 2	bool "DMA-BUF System Heap"
 3	depends on DMABUF_HEAPS
 4	help
 5	  Choose this option to enable the system dmabuf heap. The system heap
 6	  is backed by pages from the buddy allocator. If in doubt, say Y.
 7
 8config DMABUF_HEAPS_CMA
 9	bool "DMA-BUF CMA Heap"
10	depends on DMABUF_HEAPS && DMA_CMA
11	help
12	  Choose this option to enable dma-buf CMA heap. This heap is backed
13	  by the Contiguous Memory Allocator (CMA). If your system has these
14	  regions, you should say Y here.