config DMABUF_HEAPS_SYSTEM bool "DMA-BUF System Heap" depends on DMABUF_HEAPS help Choose this option to enable the system dmabuf heap. The system heap is backed by pages from the buddy allocator. If in doubt, say Y. config DMABUF_HEAPS_CMA bool "DMA-BUF CMA Heap" depends on DMABUF_HEAPS && DMA_CMA help Choose this option to enable dma-buf CMA heap. This heap is backed by the Contiguous Memory Allocator (CMA). If your system has these regions, you should say Y here. config DMABUF_HEAPS_CMA_LEGACY bool "Legacy DMA-BUF CMA Heap" default y depends on DMABUF_HEAPS_CMA help Add a duplicate CMA-backed dma-buf heap with legacy naming derived from the CMA area's devicetree node, or "reserved" if the area is not defined in the devicetree. This uses the same underlying allocator as CONFIG_DMABUF_HEAPS_CMA.