1 # SPDX-License-Identifier: GPL-2.0-only
2 menu "IRQ subsystem"
3 # Options selectable by the architecture code
4
5 # Make sparse irq Kconfig switch below availab
6 config MAY_HAVE_SPARSE_IRQ
7 bool
8
9 # Legacy support, required for itanic
10 config GENERIC_IRQ_LEGACY
11 bool
12
13 # Enable the generic irq autoprobe mechanism
14 config GENERIC_IRQ_PROBE
15 bool
16
17 # Use the generic /proc/interrupts implementat
18 config GENERIC_IRQ_SHOW
19 bool
20
21 # Print level/edge extra information
22 config GENERIC_IRQ_SHOW_LEVEL
23 bool
24
25 # Supports effective affinity mask
26 config GENERIC_IRQ_EFFECTIVE_AFF_MASK
27 depends on SMP
28 bool
29
30 # Support for delayed migration from interrupt
31 config GENERIC_PENDING_IRQ
32 bool
33
34 # Support for generic irq migrating off cpu be
35 config GENERIC_IRQ_MIGRATION
36 bool
37
38 # Alpha specific irq affinity mechanism
39 config AUTO_IRQ_AFFINITY
40 bool
41
42 # Interrupt injection mechanism
43 config GENERIC_IRQ_INJECTION
44 bool
45
46 # Tasklet based software resend for pending in
47 config HARDIRQS_SW_RESEND
48 bool
49
50 # Edge style eoi based handler (cell)
51 config IRQ_EDGE_EOI_HANDLER
52 bool
53
54 # Generic configurable interrupt chip implemen
55 config GENERIC_IRQ_CHIP
56 bool
57 select IRQ_DOMAIN
58
59 # Generic irq_domain hw <--> linux irq number
60 config IRQ_DOMAIN
61 bool
62
63 # Support for simulated interrupts
64 config IRQ_SIM
65 bool
66 select IRQ_WORK
67 select IRQ_DOMAIN
68
69 # Support for hierarchical irq domains
70 config IRQ_DOMAIN_HIERARCHY
71 bool
72 select IRQ_DOMAIN
73
74 # Support for obsolete non-mapping irq domains
75 config IRQ_DOMAIN_NOMAP
76 bool
77 select IRQ_DOMAIN
78
79 # Support for hierarchical fasteoi+edge and fa
80 config IRQ_FASTEOI_HIERARCHY_HANDLERS
81 bool
82
83 # Generic IRQ IPI support
84 config GENERIC_IRQ_IPI
85 bool
86 depends on SMP
87 select IRQ_DOMAIN_HIERARCHY
88
89 # Generic IRQ IPI Mux support
90 config GENERIC_IRQ_IPI_MUX
91 bool
92 depends on SMP
93
94 # Generic MSI hierarchical interrupt domain su
95 config GENERIC_MSI_IRQ
96 bool
97 select IRQ_DOMAIN_HIERARCHY
98
99 config IRQ_MSI_IOMMU
100 bool
101
102 config IRQ_TIMINGS
103 bool
104
105 config GENERIC_IRQ_MATRIX_ALLOCATOR
106 bool
107
108 config GENERIC_IRQ_RESERVATION_MODE
109 bool
110
111 # Snapshot for interrupt statistics
112 config GENERIC_IRQ_STAT_SNAPSHOT
113 bool
114
115 # Support forced irq threading
116 config IRQ_FORCED_THREADING
117 bool
118
119 config SPARSE_IRQ
120 bool "Support sparse irq numbering" if
121 help
122
123 Sparse irq numbering is useful for d
124 to define a high CONFIG_NR_CPUS valu
125 low kernel memory footprint on small
126
127 ( Sparse irqs can also be beneficial
128 out the interrupt descriptors in a
129
130 If you don't know what to do here, s
131
132 config GENERIC_IRQ_DEBUGFS
133 bool "Expose irq internals in debugfs"
134 depends on DEBUG_FS
135 select GENERIC_IRQ_INJECTION
136 default n
137 help
138
139 Exposes internal state information t
140 developers and debugging of hard to
141
142 If you don't know what to do here, s
143
144 endmenu
145
146 config GENERIC_IRQ_MULTI_HANDLER
147 bool
148 help
149 Allow to specify the low level IRQ h
150
151 # Cavium Octeon is the last system to use this
152 # Do not even think of enabling this on any ne
153 config DEPRECATED_IRQ_CPU_ONOFFLINE
154 bool
155 depends on CAVIUM_OCTEON_SOC
156 default CAVIUM_OCTEON_SOC
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