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# Interrupt injection mechanism
 47config GENERIC_IRQ_INJECTION
 48	bool
 49
 50# Tasklet based software resend for pending interrupts on enable_irq()
 51config HARDIRQS_SW_RESEND
 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	select IRQ_DOMAIN
 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
 85
 86# Generic MSI interrupt support
 87config GENERIC_MSI_IRQ
 88	bool
 89
 90# Generic MSI hierarchical interrupt domain support
 91config GENERIC_MSI_IRQ_DOMAIN
 92	bool
 93	select IRQ_DOMAIN_HIERARCHY
 94	select GENERIC_MSI_IRQ
 95
 96config IRQ_MSI_IOMMU
 97	bool
 98
 99config HANDLE_DOMAIN_IRQ
100	bool
101
102config IRQ_TIMINGS
103	bool
104
105config GENERIC_IRQ_MATRIX_ALLOCATOR
106	bool
107
108config GENERIC_IRQ_RESERVATION_MODE
109	bool
110
111# Support forced irq threading
112config IRQ_FORCED_THREADING
113       bool
114
115config SPARSE_IRQ
116	bool "Support sparse irq numbering" if MAY_HAVE_SPARSE_IRQ
117	help
 
118
119	  Sparse irq numbering is useful for distro kernels that want
120	  to define a high CONFIG_NR_CPUS value but still want to have
121	  low kernel memory footprint on smaller machines.
122
123	  ( Sparse irqs can also be beneficial on NUMA boxes, as they spread
124	    out the interrupt descriptors in a more NUMA-friendly way. )
125
126	  If you don't know what to do here, say N.
127
128config GENERIC_IRQ_DEBUGFS
129	bool "Expose irq internals in debugfs"
130	depends on DEBUG_FS
131	select GENERIC_IRQ_INJECTION
132	default n
133	help
134
135	  Exposes internal state information through debugfs. Mostly for
136	  developers and debugging of hard to diagnose interrupt problems.
137
138	  If you don't know what to do here, say N.
139
140endmenu
141
142config GENERIC_IRQ_MULTI_HANDLER
143	bool
144	help
145	  Allow to specify the low level IRQ handler at run time.

 1# Select this to activate the generic irq options below
 2config HAVE_GENERIC_HARDIRQS
 3	bool
 4
 5if HAVE_GENERIC_HARDIRQS
 6menu "IRQ subsystem"
 7#
 8# Interrupt subsystem related configuration options
 9#
10config GENERIC_HARDIRQS
11       def_bool y
12
13# Options selectable by the architecture code
14
15# Make sparse irq Kconfig switch below available
16config HAVE_SPARSE_IRQ
 
 
 
 
17       bool
18
19# Enable the generic irq autoprobe mechanism
20config GENERIC_IRQ_PROBE
21	bool
22
23# Use the generic /proc/interrupts implementation
24config GENERIC_IRQ_SHOW
25       bool
26
27# Print level/edge extra information
28config GENERIC_IRQ_SHOW_LEVEL
29       bool
30
 
 
 
 
 
 
 
 
 
31# Support for delayed migration from interrupt context
32config GENERIC_PENDING_IRQ
33	bool
34
 
 
 
 
35# Alpha specific irq affinity mechanism
36config AUTO_IRQ_AFFINITY
37       bool
38
 
 
 
 
39# Tasklet based software resend for pending interrupts on enable_irq()
40config HARDIRQS_SW_RESEND
41       bool
42
43# Preflow handler support for fasteoi (sparc64)
44config IRQ_PREFLOW_FASTEOI
45       bool
46
47# Edge style eoi based handler (cell)
48config IRQ_EDGE_EOI_HANDLER
49       bool
50
51# Generic configurable interrupt chip implementation
52config GENERIC_IRQ_CHIP
53       bool
 
54
55# Generic irq_domain hw <--> linux irq number translation
56config IRQ_DOMAIN
57	bool
58
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
59# Support forced irq threading
60config IRQ_FORCED_THREADING
61       bool
62
63config SPARSE_IRQ
64	bool "Support sparse irq numbering"
65	depends on HAVE_SPARSE_IRQ
66	---help---
67
68	  Sparse irq numbering is useful for distro kernels that want
69	  to define a high CONFIG_NR_CPUS value but still want to have
70	  low kernel memory footprint on smaller machines.
71
72	  ( Sparse irqs can also be beneficial on NUMA boxes, as they spread
73	    out the interrupt descriptors in a more NUMA-friendly way. )
74
75	  If you don't know what to do here, say N.
76
 
 
 
 
 
 
 
 
 
 
 
 
77endmenu
78endif