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 hierarchical fasteoi+edge and fasteoi+level handlers 74config IRQ_FASTEOI_HIERARCHY_HANDLERS 75 bool 76 77# Generic IRQ IPI support 78config GENERIC_IRQ_IPI 79 bool 80 81# Generic MSI interrupt support 82config GENERIC_MSI_IRQ 83 bool 84 85# Generic MSI hierarchical interrupt domain support 86config GENERIC_MSI_IRQ_DOMAIN 87 bool 88 select IRQ_DOMAIN_HIERARCHY 89 select GENERIC_MSI_IRQ 90 91config IRQ_MSI_IOMMU 92 bool 93 94config HANDLE_DOMAIN_IRQ 95 bool 96 97config IRQ_TIMINGS 98 bool 99 100config GENERIC_IRQ_MATRIX_ALLOCATOR 101 bool 102 103config GENERIC_IRQ_RESERVATION_MODE 104 bool 105 106# Support forced irq threading 107config IRQ_FORCED_THREADING 108 bool 109 110config SPARSE_IRQ 111 bool "Support sparse irq numbering" if MAY_HAVE_SPARSE_IRQ 112 help 113 114 Sparse irq numbering is useful for distro kernels that want 115 to define a high CONFIG_NR_CPUS value but still want to have 116 low kernel memory footprint on smaller machines. 117 118 ( Sparse irqs can also be beneficial on NUMA boxes, as they spread 119 out the interrupt descriptors in a more NUMA-friendly way. ) 120 121 If you don't know what to do here, say N. 122 123config GENERIC_IRQ_DEBUGFS 124 bool "Expose irq internals in debugfs" 125 depends on DEBUG_FS 126 select GENERIC_IRQ_INJECTION 127 default n 128 help 129 130 Exposes internal state information through debugfs. Mostly for 131 developers and debugging of hard to diagnose interrupt problems. 132 133 If you don't know what to do here, say N. 134 135endmenu 136 137config GENERIC_IRQ_MULTI_HANDLER 138 bool 139 help 140 Allow to specify the low level IRQ handler at run time. 141