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review.trustedfirmware.org / hafnium / third_party / linux / refs/heads/master / . / kernel / irq / Kconfig
blob: 0f2a44fc0971907bdcdf53a412762a345503ca1e [file] [log] [blame]
David Brazdil0f672f62019-12-10 10:32:29 +0000[diff] [blame]1# SPDX-License-Identifier: GPL-2.0-only
Andrew Scullb4b6d4a2019-01-02 15:54:55 +0000[diff] [blame]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
Olivier Deprez157378f2022-04-04 15:47:50 +0200[diff] [blame]46# Interrupt injection mechanism
47config GENERIC_IRQ_INJECTION
48 bool
49
Andrew Scullb4b6d4a2019-01-02 15:54:55 +0000[diff] [blame]50# Tasklet based software resend for pending interrupts on enable_irq()
51config HARDIRQS_SW_RESEND
52 bool
53
Andrew Scullb4b6d4a2019-01-02 15:54:55 +0000[diff] [blame]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
Olivier Deprez157378f2022-04-04 15:47:50 +0200[diff] [blame]71 select IRQ_DOMAIN
Andrew Scullb4b6d4a2019-01-02 15:54:55 +0000[diff] [blame]72
73# Support for hierarchical irq domains
74config IRQ_DOMAIN_HIERARCHY
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
Olivier Deprez92d4c212022-12-06 15:05:30 +0100[diff] [blame]85 depends on SMP
Olivier Deprez0e641232021-09-23 10:07:05 +0200[diff] [blame]86 select IRQ_DOMAIN_HIERARCHY
Andrew Scullb4b6d4a2019-01-02 15:54:55 +0000[diff] [blame]87
88# Generic MSI interrupt support
89config GENERIC_MSI_IRQ
90 bool
91
92# Generic MSI hierarchical interrupt domain support
93config GENERIC_MSI_IRQ_DOMAIN
94 bool
95 select IRQ_DOMAIN_HIERARCHY
96 select GENERIC_MSI_IRQ
97
David Brazdil0f672f62019-12-10 10:32:29 +0000[diff] [blame]98config IRQ_MSI_IOMMU
99 bool
100
Andrew Scullb4b6d4a2019-01-02 15:54:55 +0000[diff] [blame]101config HANDLE_DOMAIN_IRQ
102 bool
103
104config IRQ_TIMINGS
105 bool
106
107config GENERIC_IRQ_MATRIX_ALLOCATOR
108 bool
109
110config GENERIC_IRQ_RESERVATION_MODE
111 bool
112
113# Support forced irq threading
114config IRQ_FORCED_THREADING
115 bool
116
117config SPARSE_IRQ
118 bool "Support sparse irq numbering" if MAY_HAVE_SPARSE_IRQ
Olivier Deprez157378f2022-04-04 15:47:50 +0200[diff] [blame]119 help
Andrew Scullb4b6d4a2019-01-02 15:54:55 +0000[diff] [blame]120
121 Sparse irq numbering is useful for distro kernels that want
122 to define a high CONFIG_NR_CPUS value but still want to have
123 low kernel memory footprint on smaller machines.
124
125 ( Sparse irqs can also be beneficial on NUMA boxes, as they spread
126 out the interrupt descriptors in a more NUMA-friendly way. )
127
128 If you don't know what to do here, say N.
129
130config GENERIC_IRQ_DEBUGFS
131 bool "Expose irq internals in debugfs"
132 depends on DEBUG_FS
Olivier Deprez157378f2022-04-04 15:47:50 +0200[diff] [blame]133 select GENERIC_IRQ_INJECTION
Andrew Scullb4b6d4a2019-01-02 15:54:55 +0000[diff] [blame]134 default n
Olivier Deprez157378f2022-04-04 15:47:50 +0200[diff] [blame]135 help
Andrew Scullb4b6d4a2019-01-02 15:54:55 +0000[diff] [blame]136
137 Exposes internal state information through debugfs. Mostly for
138 developers and debugging of hard to diagnose interrupt problems.
139
140 If you don't know what to do here, say N.
141
142endmenu
143
144config GENERIC_IRQ_MULTI_HANDLER
145 bool
146 help
147 Allow to specify the low level IRQ handler at run time.