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. 15