kernel/irq/Kconfig

   1 menu "IRQ subsystem"
   2 # Options selectable by the architecture code
   3
   4 # Make sparse irq Kconfig switch below available
   5 config MAY_HAVE_SPARSE_IRQ
   6        bool
   7
   8 # Enable the generic irq autoprobe mechanism
   9 config GENERIC_IRQ_PROBE
  10         bool
  11
  12 # Use the generic /proc/interrupts implementation
  13 config GENERIC_IRQ_SHOW
  14        bool
  15
  16 # Print level/edge extra information
  17 config GENERIC_IRQ_SHOW_LEVEL
  18        bool
  19
  20 # Support for delayed migration from interrupt context
  21 config GENERIC_PENDING_IRQ
  22         bool
  23
  24 # Alpha specific irq affinity mechanism
  25 config AUTO_IRQ_AFFINITY
  26        bool
  27
  28 # Tasklet based software resend for pending interrupts on enable_irq()
  29 config HARDIRQS_SW_RESEND
  30        bool
  31
  32 # Preflow handler support for fasteoi (sparc64)
  33 config IRQ_PREFLOW_FASTEOI
  34        bool
  35
  36 # Edge style eoi based handler (cell)
  37 config IRQ_EDGE_EOI_HANDLER
  38        bool
  39
  40 # Generic configurable interrupt chip implementation
  41 config GENERIC_IRQ_CHIP
  42        bool
  43        select IRQ_DOMAIN
  44
  45 # Generic irq_domain hw <--> linux irq number translation
  46 config IRQ_DOMAIN
  47         bool
  48
  49 config IRQ_DOMAIN_DEBUG
  50         bool "Expose hardware/virtual IRQ mapping via debugfs"
  51         depends on IRQ_DOMAIN && DEBUG_FS
  52         help
  53           This option will show the mapping relationship between hardware irq
  54           numbers and Linux irq numbers. The mapping is exposed via debugfs
  55           in the file "irq_domain_mapping".
  56
  57           If you don't know what this means you don't need it.
  58
  59 # Support forced irq threading
  60 config IRQ_FORCED_THREADING
  61        bool
  62
  63 config SPARSE_IRQ
  64         bool "Support sparse irq numbering" if MAY_HAVE_SPARSE_IRQ
  65         ---help---
  66
  67           Sparse irq numbering is useful for distro kernels that want
  68           to define a high CONFIG_NR_CPUS value but still want to have
  69           low kernel memory footprint on smaller machines.
  70
  71           ( Sparse irqs can also be beneficial on NUMA boxes, as they spread
  72             out the interrupt descriptors in a more NUMA-friendly way. )
  73
  74           If you don't know what to do here, say N.
  75
  76 endmenu