xref: /openbmc/linux/kernel/irq/Kconfig (revision a44e4f3a)
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# Facility to allocate a hardware interrupt. This is legacy support
30# and should not be used in new code. Use irq domains instead.
31config GENERIC_IRQ_LEGACY_ALLOC_HWIRQ
32       bool
33
34# Support for delayed migration from interrupt context
35config GENERIC_PENDING_IRQ
36	bool
37
38# Support for generic irq migrating off cpu before the cpu is offline.
39config GENERIC_IRQ_MIGRATION
40	bool
41
42# Alpha specific irq affinity mechanism
43config AUTO_IRQ_AFFINITY
44       bool
45
46# Tasklet based software resend for pending interrupts on enable_irq()
47config HARDIRQS_SW_RESEND
48       bool
49
50# Preflow handler support for fasteoi (sparc64)
51config IRQ_PREFLOW_FASTEOI
52       bool
53
54# Edge style eoi based handler (cell)
55config IRQ_EDGE_EOI_HANDLER
56       bool
57
58# Generic configurable interrupt chip implementation
59config GENERIC_IRQ_CHIP
60       bool
61       select IRQ_DOMAIN
62
63# Generic irq_domain hw <--> linux irq number translation
64config IRQ_DOMAIN
65	bool
66
67# Support for simulated interrupts
68config IRQ_SIM
69	bool
70	select IRQ_WORK
71
72# Support for hierarchical irq domains
73config IRQ_DOMAIN_HIERARCHY
74	bool
75	select IRQ_DOMAIN
76
77# Support for hierarchical fasteoi+edge and fasteoi+level handlers
78config IRQ_FASTEOI_HIERARCHY_HANDLERS
79	bool
80
81# Generic IRQ IPI support
82config GENERIC_IRQ_IPI
83	bool
84
85# Generic MSI interrupt support
86config GENERIC_MSI_IRQ
87	bool
88
89# Generic MSI hierarchical interrupt domain support
90config GENERIC_MSI_IRQ_DOMAIN
91	bool
92	select IRQ_DOMAIN_HIERARCHY
93	select GENERIC_MSI_IRQ
94
95config IRQ_MSI_IOMMU
96	bool
97
98config HANDLE_DOMAIN_IRQ
99	bool
100
101config IRQ_TIMINGS
102	bool
103
104config GENERIC_IRQ_MATRIX_ALLOCATOR
105	bool
106
107config GENERIC_IRQ_RESERVATION_MODE
108	bool
109
110# Support forced irq threading
111config IRQ_FORCED_THREADING
112       bool
113
114config SPARSE_IRQ
115	bool "Support sparse irq numbering" if MAY_HAVE_SPARSE_IRQ
116	---help---
117
118	  Sparse irq numbering is useful for distro kernels that want
119	  to define a high CONFIG_NR_CPUS value but still want to have
120	  low kernel memory footprint on smaller machines.
121
122	  ( Sparse irqs can also be beneficial on NUMA boxes, as they spread
123	    out the interrupt descriptors in a more NUMA-friendly way. )
124
125	  If you don't know what to do here, say N.
126
127config GENERIC_IRQ_DEBUGFS
128	bool "Expose irq internals in debugfs"
129	depends on DEBUG_FS
130	default n
131	---help---
132
133	  Exposes internal state information through debugfs. Mostly for
134	  developers and debugging of hard to diagnose interrupt problems.
135
136	  If you don't know what to do here, say N.
137
138endmenu
139
140config GENERIC_IRQ_MULTI_HANDLER
141	bool
142	help
143	  Allow to specify the low level IRQ handler at run time.
144