xref: /linux/kernel/irq/Kconfig (revision 7cb2fad97ee057c7b0cb5913074eee8071490a71) 
1menu "IRQ subsystem"
2# Options selectable by the architecture code
3
4# Make sparse irq Kconfig switch below available
5config MAY_HAVE_SPARSE_IRQ
6       bool
7
8# Legacy support, required for itanic
9config GENERIC_IRQ_LEGACY
10       bool
11
12# Enable the generic irq autoprobe mechanism
13config GENERIC_IRQ_PROBE
14	bool
15
16# Use the generic /proc/interrupts implementation
17config GENERIC_IRQ_SHOW
18       bool
19
20# Print level/edge extra information
21config GENERIC_IRQ_SHOW_LEVEL
22       bool
23
24# Supports effective affinity mask
25config 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.
30config GENERIC_IRQ_LEGACY_ALLOC_HWIRQ
31       bool
32
33# Support for delayed migration from interrupt context
34config GENERIC_PENDING_IRQ
35	bool
36
37# Support for generic irq migrating off cpu before the cpu is offline.
38config GENERIC_IRQ_MIGRATION
39	bool
40
41# Alpha specific irq affinity mechanism
42config AUTO_IRQ_AFFINITY
43       bool
44
45# Tasklet based software resend for pending interrupts on enable_irq()
46config HARDIRQS_SW_RESEND
47       bool
48
49# Preflow handler support for fasteoi (sparc64)
50config IRQ_PREFLOW_FASTEOI
51       bool
52
53# Edge style eoi based handler (cell)
54config IRQ_EDGE_EOI_HANDLER
55       bool
56
57# Generic configurable interrupt chip implementation
58config GENERIC_IRQ_CHIP
59       bool
60       select IRQ_DOMAIN
61
62# Generic irq_domain hw <--> linux irq number translation
63config IRQ_DOMAIN
64	bool
65
66# Support for simulated interrupts
67config IRQ_SIM
68	bool
69	select IRQ_WORK
70
71# Support for hierarchical irq domains
72config IRQ_DOMAIN_HIERARCHY
73	bool
74	select IRQ_DOMAIN
75
76# Generic IRQ IPI support
77config GENERIC_IRQ_IPI
78	bool
79
80# Generic MSI interrupt support
81config GENERIC_MSI_IRQ
82	bool
83
84# Generic MSI hierarchical interrupt domain support
85config GENERIC_MSI_IRQ_DOMAIN
86	bool
87	select IRQ_DOMAIN_HIERARCHY
88	select GENERIC_MSI_IRQ
89
90config HANDLE_DOMAIN_IRQ
91	bool
92
93config IRQ_TIMINGS
94	bool
95
96config IRQ_DOMAIN_DEBUG
97	bool "Expose hardware/virtual IRQ mapping via debugfs"
98	depends on IRQ_DOMAIN && DEBUG_FS
99	help
100	  This option will show the mapping relationship between hardware irq
101	  numbers and Linux irq numbers. The mapping is exposed via debugfs
102	  in the file "irq_domain_mapping".
103
104	  If you don't know what this means you don't need it.
105
106# Support forced irq threading
107config IRQ_FORCED_THREADING
108       bool
109
110config SPARSE_IRQ
111	bool "Support sparse irq numbering" if MAY_HAVE_SPARSE_IRQ
112	---help---
113
114	  Sparse irq numbering is useful for distro kernels that want
115	  to define a high CONFIG_NR_CPUS value but still want to have
116	  low kernel memory footprint on smaller machines.
117
118	  ( Sparse irqs can also be beneficial on NUMA boxes, as they spread
119	    out the interrupt descriptors in a more NUMA-friendly way. )
120
121	  If you don't know what to do here, say N.
122
123config GENERIC_IRQ_DEBUGFS
124	bool "Expose irq internals in debugfs"
125	depends on DEBUG_FS
126	default n
127	---help---
128
129	  Exposes internal state information through debugfs. Mostly for
130	  developers and debugging of hard to diagnose interrupt problems.
131
132	  If you don't know what to do here, say N.
133
134endmenu
135