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 # Legacy support, required for itanic
   9 config GENERIC_IRQ_LEGACY
  10        bool
  11
  12 # Enable the generic irq autoprobe mechanism
  13 config GENERIC_IRQ_PROBE
  14         bool
  15
  16 # Use the generic /proc/interrupts implementation
  17 config GENERIC_IRQ_SHOW
  18        bool
  19
  20 # Print level/edge extra information
  21 config GENERIC_IRQ_SHOW_LEVEL
  22        bool
  23
  24 # Supports effective affinity mask
  25 config GENERIC_IRQ_EFFECTIVE_AFF_MASK
  26        bool
  27
  28 # Facility to allocate a hardware interrupt. This is legacy support
  29 # and should not be used in new code. Use irq domains instead.
  30 config GENERIC_IRQ_LEGACY_ALLOC_HWIRQ
  31        bool
  32
  33 # Support for delayed migration from interrupt context
  34 config GENERIC_PENDING_IRQ
  35         bool
  36
  37 # Support for generic irq migrating off cpu before the cpu is offline.
  38 config GENERIC_IRQ_MIGRATION
  39         bool
  40
  41 # Alpha specific irq affinity mechanism
  42 config AUTO_IRQ_AFFINITY
  43        bool
  44
  45 # Tasklet based software resend for pending interrupts on enable_irq()
  46 config HARDIRQS_SW_RESEND
  47        bool
  48
  49 # Preflow handler support for fasteoi (sparc64)
  50 config IRQ_PREFLOW_FASTEOI
  51        bool
  52
  53 # Edge style eoi based handler (cell)
  54 config IRQ_EDGE_EOI_HANDLER
  55        bool
  56
  57 # Generic configurable interrupt chip implementation
  58 config GENERIC_IRQ_CHIP
  59        bool
  60        select IRQ_DOMAIN
  61
  62 # Generic irq_domain hw <--> linux irq number translation
  63 config IRQ_DOMAIN
  64         bool
  65
  66 # Support for hierarchical irq domains
  67 config IRQ_DOMAIN_HIERARCHY
  68         bool
  69         select IRQ_DOMAIN
  70
  71 # Generic IRQ IPI support
  72 config GENERIC_IRQ_IPI
  73         bool
  74
  75 # Generic MSI interrupt support
  76 config GENERIC_MSI_IRQ
  77         bool
  78
  79 # Generic MSI hierarchical interrupt domain support
  80 config GENERIC_MSI_IRQ_DOMAIN
  81         bool
  82         select IRQ_DOMAIN_HIERARCHY
  83         select GENERIC_MSI_IRQ
  84
  85 config HANDLE_DOMAIN_IRQ
  86         bool
  87
  88 config IRQ_TIMINGS
  89         bool
  90
  91 config IRQ_DOMAIN_DEBUG
  92         bool "Expose hardware/virtual IRQ mapping via debugfs"
  93         depends on IRQ_DOMAIN && DEBUG_FS
  94         help
  95           This option will show the mapping relationship between hardware irq
  96           numbers and Linux irq numbers. The mapping is exposed via debugfs
  97           in the file "irq_domain_mapping".
  98
  99           If you don't know what this means you don't need it.
 100
 101 # Support forced irq threading
 102 config IRQ_FORCED_THREADING
 103        bool
 104
 105 config IRQ_FORCED_THREADING_DEFAULT
 106         bool "Use IRQ threading by default"
 107         depends on IRQ_FORCED_THREADING
 108
 109 config SPARSE_IRQ
 110         bool "Support sparse irq numbering" if MAY_HAVE_SPARSE_IRQ
 111         ---help---
 112
 113           Sparse irq numbering is useful for distro kernels that want
 114           to define a high CONFIG_NR_CPUS value but still want to have
 115           low kernel memory footprint on smaller machines.
 116
 117           ( Sparse irqs can also be beneficial on NUMA boxes, as they spread
 118             out the interrupt descriptors in a more NUMA-friendly way. )
 119
 120           If you don't know what to do here, say N.
 121
 122 config GENERIC_IRQ_DEBUGFS
 123         bool "Expose irq internals in debugfs"
 124         depends on DEBUG_FS
 125         default n
 126         ---help---
 127
 128           Exposes internal state information through debugfs. Mostly for
 129           developers and debugging of hard to diagnose interrupt problems.
 130
 131           If you don't know what to do here, say N.
 132
 133 endmenu