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
30 # Support for delayed migration from interrupt context
31 config GENERIC_PENDING_IRQ
34 # Support for generic irq migrating off cpu before the cpu is offline.
35 config GENERIC_IRQ_MIGRATION
38 # Alpha specific irq affinity mechanism
39 config AUTO_IRQ_AFFINITY
42 # Interrupt injection mechanism
43 config GENERIC_IRQ_INJECTION
46 # Tasklet based software resend for pending interrupts on enable_irq()
47 config HARDIRQS_SW_RESEND
50 # Edge style eoi based handler (cell)
51 config IRQ_EDGE_EOI_HANDLER
54 # Generic configurable interrupt chip implementation
55 config GENERIC_IRQ_CHIP
59 # Generic irq_domain hw <--> linux irq number translation
63 # Support for simulated interrupts
69 # Support for hierarchical irq domains
70 config IRQ_DOMAIN_HIERARCHY
74 # Support for obsolete non-mapping irq domains
75 config IRQ_DOMAIN_NOMAP
79 # Support for hierarchical fasteoi+edge and fasteoi+level handlers
80 config IRQ_FASTEOI_HIERARCHY_HANDLERS
83 # Generic IRQ IPI support
84 config GENERIC_IRQ_IPI
87 select IRQ_DOMAIN_HIERARCHY
89 # Generic IRQ IPI Mux support
90 config GENERIC_IRQ_IPI_MUX
94 # Generic MSI hierarchical interrupt domain support
95 config GENERIC_MSI_IRQ
97 select IRQ_DOMAIN_HIERARCHY
105 config GENERIC_IRQ_MATRIX_ALLOCATOR
108 config GENERIC_IRQ_RESERVATION_MODE
111 # Snapshot for interrupt statistics
112 config GENERIC_IRQ_STAT_SNAPSHOT
115 # Support forced irq threading
116 config IRQ_FORCED_THREADING
120 bool "Support sparse irq numbering" if MAY_HAVE_SPARSE_IRQ
123 Sparse irq numbering is useful for distro kernels that want
124 to define a high CONFIG_NR_CPUS value but still want to have
125 low kernel memory footprint on smaller machines.
127 ( Sparse irqs can also be beneficial on NUMA boxes, as they spread
128 out the interrupt descriptors in a more NUMA-friendly way. )
130 If you don't know what to do here, say N.
132 config GENERIC_IRQ_DEBUGFS
133 bool "Expose irq internals in debugfs"
135 select GENERIC_IRQ_INJECTION
139 Exposes internal state information through debugfs. Mostly for
140 developers and debugging of hard to diagnose interrupt problems.
142 If you don't know what to do here, say N.
146 config GENERIC_IRQ_MULTI_HANDLER
149 Allow to specify the low level IRQ handler at run time.
151 # Cavium Octeon is the last system to use this deprecated option
152 # Do not even think of enabling this on any new platform
153 config DEPRECATED_IRQ_CPU_ONOFFLINE
155 depends on CAVIUM_OCTEON_SOC
156 default CAVIUM_OCTEON_SOC