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 hierarchical fasteoi+edge and fasteoi+level handlers
74 config IRQ_FASTEOI_HIERARCHY_HANDLERS
77 # Generic IRQ IPI support
78 config GENERIC_IRQ_IPI
81 # Generic MSI interrupt support
82 config GENERIC_MSI_IRQ
85 # Generic MSI hierarchical interrupt domain support
86 config GENERIC_MSI_IRQ_DOMAIN
88 select IRQ_DOMAIN_HIERARCHY
89 select GENERIC_MSI_IRQ
94 config HANDLE_DOMAIN_IRQ
100 config GENERIC_IRQ_MATRIX_ALLOCATOR
103 config GENERIC_IRQ_RESERVATION_MODE
106 # Support forced irq threading
107 config IRQ_FORCED_THREADING
111 bool "Support sparse irq numbering" if MAY_HAVE_SPARSE_IRQ
114 Sparse irq numbering is useful for distro kernels that want
115 to define a high CONFIG_NR_CPUS value but still want to have
116 low kernel memory footprint on smaller machines.
118 ( Sparse irqs can also be beneficial on NUMA boxes, as they spread
119 out the interrupt descriptors in a more NUMA-friendly way. )
121 If you don't know what to do here, say N.
123 config GENERIC_IRQ_DEBUGFS
124 bool "Expose irq internals in debugfs"
126 select GENERIC_IRQ_INJECTION
130 Exposes internal state information through debugfs. Mostly for
131 developers and debugging of hard to diagnose interrupt problems.
133 If you don't know what to do here, say N.
137 config GENERIC_IRQ_MULTI_HANDLER
140 Allow to specify the low level IRQ handler at run time.