Merge branch 'clock' into HEAD
[deliverable/linux.git] / kernel / irq / Kconfig
CommitLineData
d9817ebe 1menu "IRQ subsystem"
d9817ebe 2# Options selectable by the architecture code
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3
4# Make sparse irq Kconfig switch below available
2ed86b16 5config MAY_HAVE_SPARSE_IRQ
fd4afaf3 6 bool
d9817ebe 7
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8# Legacy support, required for itanic
9config GENERIC_IRQ_LEGACY
10 bool
11
c68fd4f3 12# Enable the generic irq autoprobe mechanism
d9817ebe 13config GENERIC_IRQ_PROBE
fd4afaf3 14 bool
d9817ebe 15
c68fd4f3 16# Use the generic /proc/interrupts implementation
c78b9b65 17config GENERIC_IRQ_SHOW
fd4afaf3 18 bool
c78b9b65 19
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20# Print level/edge extra information
21config GENERIC_IRQ_SHOW_LEVEL
22 bool
23
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24# Facility to allocate a hardware interrupt. This is legacy support
25# and should not be used in new code. Use irq domains instead.
26config GENERIC_IRQ_LEGACY_ALLOC_HWIRQ
27 bool
28
c68fd4f3 29# Support for delayed migration from interrupt context
d9817ebe 30config GENERIC_PENDING_IRQ
fd4afaf3 31 bool
d9817ebe 32
c68fd4f3 33# Alpha specific irq affinity mechanism
d9817ebe 34config AUTO_IRQ_AFFINITY
fd4afaf3 35 bool
d9817ebe 36
c68fd4f3 37# Tasklet based software resend for pending interrupts on enable_irq()
d9817ebe 38config HARDIRQS_SW_RESEND
fd4afaf3 39 bool
d9817ebe 40
c68fd4f3 41# Preflow handler support for fasteoi (sparc64)
78129576 42config IRQ_PREFLOW_FASTEOI
fd4afaf3 43 bool
78129576 44
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45# Edge style eoi based handler (cell)
46config IRQ_EDGE_EOI_HANDLER
47 bool
48
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49# Generic configurable interrupt chip implementation
50config GENERIC_IRQ_CHIP
51 bool
923fa4ea 52 select IRQ_DOMAIN
c42321c7 53
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54# Generic irq_domain hw <--> linux irq number translation
55config IRQ_DOMAIN
56 bool
57
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58# Support for hierarchical irq domains
59config IRQ_DOMAIN_HIERARCHY
60 bool
61 select IRQ_DOMAIN
62
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63# Generic MSI interrupt support
64config GENERIC_MSI_IRQ
65 bool
66
67# Generic MSI hierarchical interrupt domain support
68config GENERIC_MSI_IRQ_DOMAIN
69 bool
70 select IRQ_DOMAIN_HIERARCHY
71 select GENERIC_MSI_IRQ
72
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73config HANDLE_DOMAIN_IRQ
74 bool
75
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76config IRQ_DOMAIN_DEBUG
77 bool "Expose hardware/virtual IRQ mapping via debugfs"
78 depends on IRQ_DOMAIN && DEBUG_FS
79 help
80 This option will show the mapping relationship between hardware irq
81 numbers and Linux irq numbers. The mapping is exposed via debugfs
ac5830a3 82 in the file "irq_domain_mapping".
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83
84 If you don't know what this means you don't need it.
85
c68fd4f3 86# Support forced irq threading
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87config IRQ_FORCED_THREADING
88 bool
89
d9817ebe 90config SPARSE_IRQ
2ed86b16 91 bool "Support sparse irq numbering" if MAY_HAVE_SPARSE_IRQ
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92 ---help---
93
94 Sparse irq numbering is useful for distro kernels that want
95 to define a high CONFIG_NR_CPUS value but still want to have
96 low kernel memory footprint on smaller machines.
97
98 ( Sparse irqs can also be beneficial on NUMA boxes, as they spread
99 out the interrupt descriptors in a more NUMA-friendly way. )
100
101 If you don't know what to do here, say N.
102
103endmenu
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