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