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review.trustedfirmware.org / hafnium / third_party / linux / 157378f43faad830e4aa3815bde5fa9f9a9f5be6 / . / kernel / irq / Kconfig
blob: 164a031cfdb66e8fd4240ace61f1bbd5d1d7e884 [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 Deprez0e641232021-09-23 10:07:05 +0200[diff] [blame]85 select IRQ_DOMAIN_HIERARCHY
Andrew Scullb4b6d4a2019-01-02 15:54:55 +0000[diff] [blame]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
David Brazdil0f672f62019-12-10 10:32:29 +0000[diff] [blame]97config IRQ_MSI_IOMMU
98 bool
99
Andrew Scullb4b6d4a2019-01-02 15:54:55 +0000[diff] [blame]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
Olivier Deprez157378f2022-04-04 15:47:50 +0200[diff] [blame^]118 help
Andrew Scullb4b6d4a2019-01-02 15:54:55 +0000[diff] [blame]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
Olivier Deprez157378f2022-04-04 15:47:50 +0200[diff] [blame^]132 select GENERIC_IRQ_INJECTION
Andrew Scullb4b6d4a2019-01-02 15:54:55 +0000[diff] [blame]133 default n
Olivier Deprez157378f2022-04-04 15:47:50 +0200[diff] [blame^]134 help
Andrew Scullb4b6d4a2019-01-02 15:54:55 +0000[diff] [blame]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.