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linux_kernel
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kernel
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irq
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Kconfig

Kconfig 2.2 KB
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  1. menu "IRQ subsystem"
    2. 

  2. # Options selectable by the architecture code
    3. 

  3. 

  4. # Make sparse irq Kconfig switch below available
    5. 

  5. config MAY_HAVE_SPARSE_IRQ
    6. 

  6.        bool
    7. 

  7. 

  8. # Legacy support, required for itanic
    9. 

  9. config GENERIC_IRQ_LEGACY
    10. 

  10.        bool
    11. 

  11. 

  12. # Enable the generic irq autoprobe mechanism
    13. 

  13. config GENERIC_IRQ_PROBE
    14. 

  14. 	bool
    15. 

  15. 

  16. # Use the generic /proc/interrupts implementation
    17. 

  17. config GENERIC_IRQ_SHOW
    18. 

  18.        bool
    19. 

  19. 

  20. # Print level/edge extra information
    21. 

  21. config GENERIC_IRQ_SHOW_LEVEL
    22. 

  22.        bool
    23. 

  23. 

  24. # Facility to allocate a hardware interrupt. This is legacy support
    25. 

  25. # and should not be used in new code. Use irq domains instead.
    26. 

  26. config GENERIC_IRQ_LEGACY_ALLOC_HWIRQ
    27. 

  27.        bool
    28. 

  28. 

  29. # Support for delayed migration from interrupt context
    30. 

  30. config GENERIC_PENDING_IRQ
    31. 

  31. 	bool
    32. 

  32. 

  33. # Alpha specific irq affinity mechanism
    34. 

  34. config AUTO_IRQ_AFFINITY
    35. 

  35.        bool
    36. 

  36. 

  37. # Tasklet based software resend for pending interrupts on enable_irq()
    38. 

  38. config HARDIRQS_SW_RESEND
    39. 

  39.        bool
    40. 

  40. 

  41. # Preflow handler support for fasteoi (sparc64)
    42. 

  42. config IRQ_PREFLOW_FASTEOI
    43. 

  43.        bool
    44. 

  44. 

  45. # Edge style eoi based handler (cell)
    46. 

  46. config IRQ_EDGE_EOI_HANDLER
    47. 

  47.        bool
    48. 

  48. 

  49. # Generic configurable interrupt chip implementation
    50. 

  50. config GENERIC_IRQ_CHIP
    51. 

  51.        bool
    52. 

  52.        select IRQ_DOMAIN
    53. 

  53. 

  54. # Generic irq_domain hw <--> linux irq number translation
    55. 

  55. config IRQ_DOMAIN
    56. 

  56. 	bool
    57. 

  57. 

  58. config HANDLE_DOMAIN_IRQ
    59. 

  59. 	bool
    60. 

  60. 

  61. config IRQ_DOMAIN_DEBUG
    62. 

  62. 	bool "Expose hardware/virtual IRQ mapping via debugfs"
    63. 

  63. 	depends on IRQ_DOMAIN && DEBUG_FS
    64. 

  64. 	help
    65. 

  65. 	  This option will show the mapping relationship between hardware irq
    66. 

  66. 	  numbers and Linux irq numbers. The mapping is exposed via debugfs
    67. 

  67. 	  in the file "irq_domain_mapping".
    68. 

  68. 

  69. 	  If you don't know what this means you don't need it.
    70. 

  70. 

  71. # Support forced irq threading
    72. 

  72. config IRQ_FORCED_THREADING
    73. 

  73.        bool
    74. 

  74. 

  75. config SPARSE_IRQ
    76. 

  76. 	bool "Support sparse irq numbering" if MAY_HAVE_SPARSE_IRQ
    77. 

  77. 	---help---
    78. 

  78. 

  79. 	  Sparse irq numbering is useful for distro kernels that want
    80. 

  80. 	  to define a high CONFIG_NR_CPUS value but still want to have
    81. 

  81. 	  low kernel memory footprint on smaller machines.
    82. 

  82. 

  83. 	  ( Sparse irqs can also be beneficial on NUMA boxes, as they spread
    84. 

  84. 	    out the interrupt descriptors in a more NUMA-friendly way. )
    85. 

  85. 

  86. 	  If you don't know what to do here, say N.
    87. 

  87. 

  88. endmenu
    89.