| menuconfig ION |
| bool "Ion Memory Manager" |
| depends on HAVE_MEMBLOCK && HAS_DMA && MMU |
| select GENERIC_ALLOCATOR |
| select DMA_SHARED_BUFFER |
| ---help--- |
| Chose this option to enable the ION Memory Manager, |
| used by Android to efficiently allocate buffers |
| from userspace that can be shared between drivers. |
| If you're not using Android its probably safe to |
| say N here. |
| |
| config ION_SYSTEM_HEAP |
| bool "Ion system heap" |
| depends on ION |
| help |
| Choose this option to enable the Ion system heap. The system heap |
| is backed by pages from the buddy allocator. If in doubt, say Y. |
| |
| config ION_CARVEOUT_HEAP |
| bool "Ion carveout heap support" |
| depends on ION |
| help |
| Choose this option to enable carveout heaps with Ion. Carveout heaps |
| are backed by memory reserved from the system. Allocation times are |
| typically faster at the cost of memory not being used. Unless you |
| know your system has these regions, you should say N here. |
| |
| config ION_CHUNK_HEAP |
| bool "Ion chunk heap support" |
| depends on ION |
| help |
| Choose this option to enable chunk heaps with Ion. This heap is |
| similar in function the carveout heap but memory is broken down |
| into smaller chunk sizes, typically corresponding to a TLB size. |
| Unless you know your system has these regions, you should say N here. |
| |
| config ION_CMA_HEAP |
| bool "Ion CMA heap support" |
| depends on ION && CMA |
| help |
| Choose this option to enable CMA heaps with Ion. This heap is backed |
| by the Contiguous Memory Allocator (CMA). If your system has these |
| regions, you should say Y here. |
