drivers/staging/android/ion/Kconfig

   1 menuconfig ION
   2         bool "Ion Memory Manager"
   3         depends on HAVE_MEMBLOCK && HAS_DMA && MMU
   4         select GENERIC_ALLOCATOR
   5         select DMA_SHARED_BUFFER
   6         ---help---
   7           Chose this option to enable the ION Memory Manager,
   8           used by Android to efficiently allocate buffers
   9           from userspace that can be shared between drivers.
  10           If you're not using Android its probably safe to
  11           say N here.
  12
  13 config ION_SYSTEM_HEAP
  14         bool "Ion system heap"
  15         depends on ION
  16         help
  17           Choose this option to enable the Ion system heap. The system heap
  18           is backed by pages from the buddy allocator. If in doubt, say Y.
  19
  20 config ION_CARVEOUT_HEAP
  21         bool "Ion carveout heap support"
  22         depends on ION
  23         help
  24           Choose this option to enable carveout heaps with Ion. Carveout heaps
  25           are backed by memory reserved from the system. Allocation times are
  26           typically faster at the cost of memory not being used. Unless you
  27           know your system has these regions, you should say N here.
  28
  29 config ION_CHUNK_HEAP
  30         bool "Ion chunk heap support"
  31         depends on ION
  32         help
  33           Choose this option to enable chunk heaps with Ion. This heap is
  34           similar in function the carveout heap but memory is broken down
  35           into smaller chunk sizes, typically corresponding to a TLB size.
  36           Unless you know your system has these regions, you should say N here.
  37
  38 config ION_CMA_HEAP
  39         bool "Ion CMA heap support"
  40         depends on ION && CMA
  41         help
  42           Choose this option to enable CMA heaps with Ion. This heap is backed
  43           by the Contiguous Memory Allocator (CMA). If your system has these
  44           regions, you should say Y here.