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 simulated interrupts
  67 config IRQ_SIM
  68         bool
  69         select IRQ_WORK
  70
  71 # Support for hierarchical irq domains
  72 config IRQ_DOMAIN_HIERARCHY
  73         bool
  74         select IRQ_DOMAIN
  75
  76 # Support for hierarchical fasteoi+edge and fasteoi+level handlers
  77 config IRQ_FASTEOI_HIERARCHY_HANDLERS
  78         bool
  79
  80 # Generic IRQ IPI support
  81 config GENERIC_IRQ_IPI
  82         bool
  83
  84 # Generic MSI interrupt support
  85 config GENERIC_MSI_IRQ
  86         bool
  87
  88 # Generic MSI hierarchical interrupt domain support
  89 config GENERIC_MSI_IRQ_DOMAIN
  90         bool
  91         select IRQ_DOMAIN_HIERARCHY
  92         select GENERIC_MSI_IRQ
  93
  94 config HANDLE_DOMAIN_IRQ
  95         bool
  96
  97 config IRQ_TIMINGS
  98         bool
  99
 100 config GENERIC_IRQ_MATRIX_ALLOCATOR
 101         bool
 102
 103 config GENERIC_IRQ_RESERVATION_MODE
 104         bool
 105
 106 config IRQ_DOMAIN_DEBUG
 107         bool "Expose hardware/virtual IRQ mapping via debugfs"
 108         depends on IRQ_DOMAIN && DEBUG_FS
 109         help
 110           This option will show the mapping relationship between hardware irq
 111           numbers and Linux irq numbers. The mapping is exposed via debugfs
 112           in the file "irq_domain_mapping".
 113
 114           If you don't know what this means you don't need it.
 115
 116 # Support forced irq threading
 117 config IRQ_FORCED_THREADING
 118        bool
 119
 120 config SPARSE_IRQ
 121         bool "Support sparse irq numbering" if MAY_HAVE_SPARSE_IRQ
 122         ---help---
 123
 124           Sparse irq numbering is useful for distro kernels that want
 125           to define a high CONFIG_NR_CPUS value but still want to have
 126           low kernel memory footprint on smaller machines.
 127
 128           ( Sparse irqs can also be beneficial on NUMA boxes, as they spread
 129             out the interrupt descriptors in a more NUMA-friendly way. )
 130
 131           If you don't know what to do here, say N.
 132
 133 config GENERIC_IRQ_DEBUGFS
 134         bool "Expose irq internals in debugfs"
 135         depends on DEBUG_FS
 136         default n
 137         ---help---
 138
 139           Exposes internal state information through debugfs. Mostly for
 140           developers and debugging of hard to diagnose interrupt problems.
 141
 142           If you don't know what to do here, say N.
 143
 144 endmenu