1 # SPDX-License-Identifier: GPL-2.0-only
3 # Options selectable by the architecture code
5 # Make sparse irq Kconfig switch below available
6 config MAY_HAVE_SPARSE_IRQ
9 # Legacy support, required for itanic
10 config GENERIC_IRQ_LEGACY
13 # Enable the generic irq autoprobe mechanism
14 config GENERIC_IRQ_PROBE
17 # Use the generic /proc/interrupts implementation
18 config GENERIC_IRQ_SHOW
21 # Print level/edge extra information
22 config GENERIC_IRQ_SHOW_LEVEL
25 # Supports effective affinity mask
26 config GENERIC_IRQ_EFFECTIVE_AFF_MASK
29 # Support for delayed migration from interrupt context
30 config GENERIC_PENDING_IRQ
33 # Support for generic irq migrating off cpu before the cpu is offline.
34 config GENERIC_IRQ_MIGRATION
37 # Alpha specific irq affinity mechanism
38 config AUTO_IRQ_AFFINITY
41 # Interrupt injection mechanism
42 config GENERIC_IRQ_INJECTION
45 # Tasklet based software resend for pending interrupts on enable_irq()
46 config HARDIRQS_SW_RESEND
49 # Edge style eoi based handler (cell)
50 config IRQ_EDGE_EOI_HANDLER
53 # Generic configurable interrupt chip implementation
54 config GENERIC_IRQ_CHIP
58 # Generic irq_domain hw <--> linux irq number translation
62 # Support for simulated interrupts
68 # Support for hierarchical irq domains
69 config IRQ_DOMAIN_HIERARCHY
73 # Support for obsolete non-mapping irq domains
74 config IRQ_DOMAIN_NOMAP
78 # Support for hierarchical fasteoi+edge and fasteoi+level handlers
79 config IRQ_FASTEOI_HIERARCHY_HANDLERS
82 # Generic IRQ IPI support
83 config GENERIC_IRQ_IPI
86 select IRQ_DOMAIN_HIERARCHY
88 # Generic MSI interrupt support
89 config GENERIC_MSI_IRQ
92 # Generic MSI hierarchical interrupt domain support
93 config GENERIC_MSI_IRQ_DOMAIN
95 select IRQ_DOMAIN_HIERARCHY
96 select GENERIC_MSI_IRQ
101 config HANDLE_DOMAIN_IRQ
107 config GENERIC_IRQ_MATRIX_ALLOCATOR
110 config GENERIC_IRQ_RESERVATION_MODE
113 # Support forced irq threading
114 config IRQ_FORCED_THREADING
118 bool "Support sparse irq numbering" if MAY_HAVE_SPARSE_IRQ
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.
125 ( Sparse irqs can also be beneficial on NUMA boxes, as they spread
126 out the interrupt descriptors in a more NUMA-friendly way. )
128 If you don't know what to do here, say N.
130 config GENERIC_IRQ_DEBUGFS
131 bool "Expose irq internals in debugfs"
133 select GENERIC_IRQ_INJECTION
137 Exposes internal state information through debugfs. Mostly for
138 developers and debugging of hard to diagnose interrupt problems.
140 If you don't know what to do here, say N.
144 config GENERIC_IRQ_MULTI_HANDLER
147 Allow to specify the low level IRQ handler at run time.