kernel/irq/Kconfig

   1 # Select this to activate the generic irq options below
   2 config HAVE_GENERIC_HARDIRQS
   3         bool
   4
   5 if HAVE_GENERIC_HARDIRQS
   6 menu "IRQ subsystem"
   7 #
   8 # Interrupt subsystem related configuration options
   9 #
  10 config GENERIC_HARDIRQS
  11        def_bool y
  12
  13 # Options selectable by the architecture code
  14
  15 # Make sparse irq Kconfig switch below available
  16 config MAY_HAVE_SPARSE_IRQ
  17        bool
  18
  19 # Enable the generic irq autoprobe mechanism
  20 config GENERIC_IRQ_PROBE
  21         bool
  22
  23 # Use the generic /proc/interrupts implementation
  24 config GENERIC_IRQ_SHOW
  25        bool
  26
  27 # Print level/edge extra information
  28 config GENERIC_IRQ_SHOW_LEVEL
  29        bool
  30
  31 # Support for delayed migration from interrupt context
  32 config GENERIC_PENDING_IRQ
  33         bool
  34
  35 # Alpha specific irq affinity mechanism
  36 config AUTO_IRQ_AFFINITY
  37        bool
  38
  39 # Tasklet based software resend for pending interrupts on enable_irq()
  40 config HARDIRQS_SW_RESEND
  41        bool
  42
  43 # Preflow handler support for fasteoi (sparc64)
  44 config IRQ_PREFLOW_FASTEOI
  45        bool
  46
  47 # Edge style eoi based handler (cell)
  48 config IRQ_EDGE_EOI_HANDLER
  49        bool
  50
  51 # Generic configurable interrupt chip implementation
  52 config GENERIC_IRQ_CHIP
  53        bool
  54
  55 # Generic irq_domain hw <--> linux irq number translation
  56 config IRQ_DOMAIN
  57         bool
  58
  59 config IRQ_DOMAIN_DEBUG
  60         bool "Expose hardware/virtual IRQ mapping via debugfs"
  61         depends on IRQ_DOMAIN && DEBUG_FS
  62         help
  63           This option will show the mapping relationship between hardware irq
  64           numbers and Linux irq numbers. The mapping is exposed via debugfs
  65           in the file "irq_domain_mapping".
  66
  67           If you don't know what this means you don't need it.
  68
  69 # Support forced irq threading
  70 config IRQ_FORCED_THREADING
  71        bool
  72
  73 config SPARSE_IRQ
  74         bool "Support sparse irq numbering" if MAY_HAVE_SPARSE_IRQ
  75         ---help---
  76
  77           Sparse irq numbering is useful for distro kernels that want
  78           to define a high CONFIG_NR_CPUS value but still want to have
  79           low kernel memory footprint on smaller machines.
  80
  81           ( Sparse irqs can also be beneficial on NUMA boxes, as they spread
  82             out the interrupt descriptors in a more NUMA-friendly way. )
  83
  84           If you don't know what to do here, say N.
  85
  86 endmenu
  87 endif