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 # Facility to allocate a hardware interrupt. This is legacy support
30 # and should not be used in new code. Use irq domains instead.
31 config GENERIC_IRQ_LEGACY_ALLOC_HWIRQ
34 # Support for delayed migration from interrupt context
35 config GENERIC_PENDING_IRQ
38 # Support for generic irq migrating off cpu before the cpu is offline.
39 config GENERIC_IRQ_MIGRATION
42 # Alpha specific irq affinity mechanism
43 config AUTO_IRQ_AFFINITY
46 # Interrupt injection mechanism
47 config GENERIC_IRQ_INJECTION
50 # Tasklet based software resend for pending interrupts on enable_irq()
51 config HARDIRQS_SW_RESEND
54 # Preflow handler support for fasteoi (sparc64)
55 config IRQ_PREFLOW_FASTEOI
58 # Edge style eoi based handler (cell)
59 config IRQ_EDGE_EOI_HANDLER
62 # Generic configurable interrupt chip implementation
63 config GENERIC_IRQ_CHIP
67 # Generic irq_domain hw <--> linux irq number translation
71 # Support for simulated interrupts
76 # Support for hierarchical irq domains
77 config IRQ_DOMAIN_HIERARCHY
81 # Support for hierarchical fasteoi+edge and fasteoi+level handlers
82 config IRQ_FASTEOI_HIERARCHY_HANDLERS
85 # Generic IRQ IPI support
86 config GENERIC_IRQ_IPI
89 # Generic MSI interrupt support
90 config GENERIC_MSI_IRQ
93 # Generic MSI hierarchical interrupt domain support
94 config GENERIC_MSI_IRQ_DOMAIN
96 select IRQ_DOMAIN_HIERARCHY
97 select GENERIC_MSI_IRQ
102 config HANDLE_DOMAIN_IRQ
108 config GENERIC_IRQ_MATRIX_ALLOCATOR
111 config GENERIC_IRQ_RESERVATION_MODE
114 # Support forced irq threading
115 config IRQ_FORCED_THREADING
119 bool "Support sparse irq numbering" if MAY_HAVE_SPARSE_IRQ
122 Sparse irq numbering is useful for distro kernels that want
123 to define a high CONFIG_NR_CPUS value but still want to have
124 low kernel memory footprint on smaller machines.
126 ( Sparse irqs can also be beneficial on NUMA boxes, as they spread
127 out the interrupt descriptors in a more NUMA-friendly way. )
129 If you don't know what to do here, say N.
131 config GENERIC_IRQ_DEBUGFS
132 bool "Expose irq internals in debugfs"
134 select GENERIC_IRQ_INJECTION
138 Exposes internal state information through debugfs. Mostly for
139 developers and debugging of hard to diagnose interrupt problems.
141 If you don't know what to do here, say N.
145 config GENERIC_IRQ_MULTI_HANDLER
148 Allow to specify the low level IRQ handler at run time.