1# SPDX-License-Identifier: GPL-2.0-only 2menu "IRQ subsystem" 3# Options selectable by the architecture code 4 5# Make sparse irq Kconfig switch below available 6config MAY_HAVE_SPARSE_IRQ 7 bool 8 9# Legacy support, required for itanic 10config GENERIC_IRQ_LEGACY 11 bool 12 13# Enable the generic irq autoprobe mechanism 14config GENERIC_IRQ_PROBE 15 bool 16 17# Use the generic /proc/interrupts implementation 18config GENERIC_IRQ_SHOW 19 bool 20 21# Print level/edge extra information 22config GENERIC_IRQ_SHOW_LEVEL 23 bool 24 25# Supports effective affinity mask 26config GENERIC_IRQ_EFFECTIVE_AFF_MASK 27 bool 28 29# Facility to allocate a hardware interrupt. This is legacy support 30# and should not be used in new code. Use irq domains instead. 31config GENERIC_IRQ_LEGACY_ALLOC_HWIRQ 32 bool 33 34# Support for delayed migration from interrupt context 35config GENERIC_PENDING_IRQ 36 bool 37 38# Support for generic irq migrating off cpu before the cpu is offline. 39config GENERIC_IRQ_MIGRATION 40 bool 41 42# Alpha specific irq affinity mechanism 43config AUTO_IRQ_AFFINITY 44 bool 45 46# Interrupt injection mechanism 47config GENERIC_IRQ_INJECTION 48 bool 49 50# Tasklet based software resend for pending interrupts on enable_irq() 51config HARDIRQS_SW_RESEND 52 bool 53 54# Edge style eoi based handler (cell) 55config IRQ_EDGE_EOI_HANDLER 56 bool 57 58# Generic configurable interrupt chip implementation 59config GENERIC_IRQ_CHIP 60 bool 61 select IRQ_DOMAIN 62 63# Generic irq_domain hw <--> linux irq number translation 64config IRQ_DOMAIN 65 bool 66 67# Support for simulated interrupts 68config IRQ_SIM 69 bool 70 select IRQ_WORK 71 select IRQ_DOMAIN 72 73# Support for hierarchical irq domains 74config IRQ_DOMAIN_HIERARCHY 75 bool 76 select IRQ_DOMAIN 77 78# Support for hierarchical fasteoi+edge and fasteoi+level handlers 79config IRQ_FASTEOI_HIERARCHY_HANDLERS 80 bool 81 82# Generic IRQ IPI support 83config GENERIC_IRQ_IPI 84 bool 85 select IRQ_DOMAIN_HIERARCHY 86 87# Generic MSI interrupt support 88config GENERIC_MSI_IRQ 89 bool 90 91# Generic MSI hierarchical interrupt domain support 92config GENERIC_MSI_IRQ_DOMAIN 93 bool 94 select IRQ_DOMAIN_HIERARCHY 95 select GENERIC_MSI_IRQ 96 97config IRQ_MSI_IOMMU 98 bool 99 100config HANDLE_DOMAIN_IRQ 101 bool 102 103config IRQ_TIMINGS 104 bool 105 106config GENERIC_IRQ_MATRIX_ALLOCATOR 107 bool 108 109config GENERIC_IRQ_RESERVATION_MODE 110 bool 111 112# Support forced irq threading 113config IRQ_FORCED_THREADING 114 bool 115 116config SPARSE_IRQ 117 bool "Support sparse irq numbering" if MAY_HAVE_SPARSE_IRQ 118 help 119 120 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. 123 124 ( Sparse irqs can also be beneficial on NUMA boxes, as they spread 125 out the interrupt descriptors in a more NUMA-friendly way. ) 126 127 If you don't know what to do here, say N. 128 129config GENERIC_IRQ_DEBUGFS 130 bool "Expose irq internals in debugfs" 131 depends on DEBUG_FS 132 select GENERIC_IRQ_INJECTION 133 default n 134 help 135 136 Exposes internal state information through debugfs. Mostly for 137 developers and debugging of hard to diagnose interrupt problems. 138 139 If you don't know what to do here, say N. 140 141endmenu 142 143config GENERIC_IRQ_MULTI_HANDLER 144 bool 145 help 146 Allow to specify the low level IRQ handler at run time. 147