xref: /openbmc/linux/kernel/irq/Kconfig (revision 2579af94)
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       depends on SMP
28       bool
29
30# Support for delayed migration from interrupt context
31config GENERIC_PENDING_IRQ
32	bool
33
34# Support for generic irq migrating off cpu before the cpu is offline.
35config GENERIC_IRQ_MIGRATION
36	bool
37
38# Alpha specific irq affinity mechanism
39config AUTO_IRQ_AFFINITY
40       bool
41
42# Interrupt injection mechanism
43config GENERIC_IRQ_INJECTION
44	bool
45
46# Tasklet based software resend for pending interrupts on enable_irq()
47config HARDIRQS_SW_RESEND
48       bool
49
50# Edge style eoi based handler (cell)
51config IRQ_EDGE_EOI_HANDLER
52       bool
53
54# Generic configurable interrupt chip implementation
55config GENERIC_IRQ_CHIP
56       bool
57       select IRQ_DOMAIN
58
59# Generic irq_domain hw <--> linux irq number translation
60config IRQ_DOMAIN
61	bool
62
63# Support for simulated interrupts
64config IRQ_SIM
65	bool
66	select IRQ_WORK
67	select IRQ_DOMAIN
68
69# Support for hierarchical irq domains
70config IRQ_DOMAIN_HIERARCHY
71	bool
72	select IRQ_DOMAIN
73
74# Support for obsolete non-mapping irq domains
75config IRQ_DOMAIN_NOMAP
76	bool
77	select IRQ_DOMAIN
78
79# Support for hierarchical fasteoi+edge and fasteoi+level handlers
80config IRQ_FASTEOI_HIERARCHY_HANDLERS
81	bool
82
83# Generic IRQ IPI support
84config GENERIC_IRQ_IPI
85	bool
86	depends on SMP
87	select IRQ_DOMAIN_HIERARCHY
88
89# Generic MSI hierarchical interrupt domain support
90config GENERIC_MSI_IRQ
91	bool
92	select IRQ_DOMAIN_HIERARCHY
93
94config IRQ_MSI_IOMMU
95	bool
96
97config IRQ_TIMINGS
98	bool
99
100config GENERIC_IRQ_MATRIX_ALLOCATOR
101	bool
102
103config GENERIC_IRQ_RESERVATION_MODE
104	bool
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	select GENERIC_IRQ_INJECTION
127	default n
128	help
129
130	  Exposes internal state information through debugfs. Mostly for
131	  developers and debugging of hard to diagnose interrupt problems.
132
133	  If you don't know what to do here, say N.
134
135endmenu
136
137config GENERIC_IRQ_MULTI_HANDLER
138	bool
139	help
140	  Allow to specify the low level IRQ handler at run time.
141
142# Cavium Octeon is the last system to use this deprecated option
143# Do not even think of enabling this on any new platform
144config DEPRECATED_IRQ_CPU_ONOFFLINE
145	bool
146	depends on CAVIUM_OCTEON_SOC
147	default CAVIUM_OCTEON_SOC
148