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# Support for delayed migration from interrupt context 30config GENERIC_PENDING_IRQ 31 bool 32 33# Support for generic irq migrating off cpu before the cpu is offline. 34config GENERIC_IRQ_MIGRATION 35 bool 36 37# Alpha specific irq affinity mechanism 38config AUTO_IRQ_AFFINITY 39 bool 40 41# Interrupt injection mechanism 42config GENERIC_IRQ_INJECTION 43 bool 44 45# Tasklet based software resend for pending interrupts on enable_irq() 46config HARDIRQS_SW_RESEND 47 bool 48 49# Edge style eoi based handler (cell) 50config IRQ_EDGE_EOI_HANDLER 51 bool 52 53# Generic configurable interrupt chip implementation 54config GENERIC_IRQ_CHIP 55 bool 56 select IRQ_DOMAIN 57 58# Generic irq_domain hw <--> linux irq number translation 59config IRQ_DOMAIN 60 bool 61 62# Support for simulated interrupts 63config IRQ_SIM 64 bool 65 select IRQ_WORK 66 select IRQ_DOMAIN 67 68# Support for hierarchical irq domains 69config IRQ_DOMAIN_HIERARCHY 70 bool 71 select IRQ_DOMAIN 72 73# Support for obsolete non-mapping irq domains 74config IRQ_DOMAIN_NOMAP 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 IRQ_TIMINGS 101 bool 102 103config GENERIC_IRQ_MATRIX_ALLOCATOR 104 bool 105 106config GENERIC_IRQ_RESERVATION_MODE 107 bool 108 109# Support forced irq threading 110config IRQ_FORCED_THREADING 111 bool 112 113config SPARSE_IRQ 114 bool "Support sparse irq numbering" if MAY_HAVE_SPARSE_IRQ 115 help 116 117 Sparse irq numbering is useful for distro kernels that want 118 to define a high CONFIG_NR_CPUS value but still want to have 119 low kernel memory footprint on smaller machines. 120 121 ( Sparse irqs can also be beneficial on NUMA boxes, as they spread 122 out the interrupt descriptors in a more NUMA-friendly way. ) 123 124 If you don't know what to do here, say N. 125 126config GENERIC_IRQ_DEBUGFS 127 bool "Expose irq internals in debugfs" 128 depends on DEBUG_FS 129 select GENERIC_IRQ_INJECTION 130 default n 131 help 132 133 Exposes internal state information through debugfs. Mostly for 134 developers and debugging of hard to diagnose interrupt problems. 135 136 If you don't know what to do here, say N. 137 138endmenu 139 140config GENERIC_IRQ_MULTI_HANDLER 141 bool 142 help 143 Allow to specify the low level IRQ handler at run time. 144 145# Cavium Octeon is the last system to use this deprecated option 146# Do not even think of enabling this on any new platform 147config DEPRECATED_IRQ_CPU_ONOFFLINE 148 bool 149 depends on CAVIUM_OCTEON_SOC 150 default CAVIUM_OCTEON_SOC 151