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 # Generic configurable interrupt chip implementation
51 config GENERIC_IRQ_CHIP
55 # Generic irq_domain hw <--> linux irq number translation
59 # Support for simulated interrupts
65 # Support for hierarchical irq domains
66 config IRQ_DOMAIN_HIERARCHY
70 # Support for obsolete non-mapping irq domains
71 config IRQ_DOMAIN_NOMAP
75 # Support for hierarchical fasteoi+edge and fasteoi+level handlers
76 config IRQ_FASTEOI_HIERARCHY_HANDLERS
79 # Generic IRQ IPI support
80 config GENERIC_IRQ_IPI
83 select IRQ_DOMAIN_HIERARCHY
85 # Generic IRQ IPI Mux support
86 config GENERIC_IRQ_IPI_MUX
90 # Generic MSI hierarchical interrupt domain support
91 config GENERIC_MSI_IRQ
93 select IRQ_DOMAIN_HIERARCHY
95 # irqchip drivers should select this if they call iommu_dma_prepare_msi()
102 config GENERIC_IRQ_MATRIX_ALLOCATOR
105 config GENERIC_IRQ_RESERVATION_MODE
108 # Snapshot for interrupt statistics
109 config GENERIC_IRQ_STAT_SNAPSHOT
112 # Support forced irq threading
113 config IRQ_FORCED_THREADING
117 bool "Support sparse irq numbering" if MAY_HAVE_SPARSE_IRQ
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.
124 ( Sparse irqs can also be beneficial on NUMA boxes, as they spread
125 out the interrupt descriptors in a more NUMA-friendly way. )
127 If you don't know what to do here, say N.
129 config GENERIC_IRQ_DEBUGFS
130 bool "Expose irq internals in debugfs"
132 select GENERIC_IRQ_INJECTION
136 Exposes internal state information through debugfs. Mostly for
137 developers and debugging of hard to diagnose interrupt problems.
139 If you don't know what to do here, say N.
141 # Clear forwarded VM interrupts during kexec.
142 # This option ensures the kernel clears active states for interrupts
143 # forwarded to virtual machines (VMs) during a machine kexec.
144 config GENERIC_IRQ_KEXEC_CLEAR_VM_FORWARD
149 config GENERIC_IRQ_MULTI_HANDLER
152 Allow to specify the low level IRQ handler at run time.
154 # Cavium Octeon is the last system to use this deprecated option
155 # Do not even think of enabling this on any new platform
156 config DEPRECATED_IRQ_CPU_ONOFFLINE
158 depends on CAVIUM_OCTEON_SOC
159 default CAVIUM_OCTEON_SOC