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# Tasklet based software resend for pending interrupts on enable_irq() 47config HARDIRQS_SW_RESEND 48 bool 49 50# Preflow handler support for fasteoi (sparc64) 51config IRQ_PREFLOW_FASTEOI 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 72# Support for hierarchical irq domains 73config IRQ_DOMAIN_HIERARCHY 74 bool 75 select IRQ_DOMAIN 76 77# Support for hierarchical fasteoi+edge and fasteoi+level handlers 78config IRQ_FASTEOI_HIERARCHY_HANDLERS 79 bool 80 81# Generic IRQ IPI support 82config GENERIC_IRQ_IPI 83 bool 84 85# Generic MSI interrupt support 86config GENERIC_MSI_IRQ 87 bool 88 89# Generic MSI hierarchical interrupt domain support 90config GENERIC_MSI_IRQ_DOMAIN 91 bool 92 select IRQ_DOMAIN_HIERARCHY 93 select GENERIC_MSI_IRQ 94 95config IRQ_MSI_IOMMU 96 bool 97 98config HANDLE_DOMAIN_IRQ 99 bool 100 101config IRQ_TIMINGS 102 bool 103 104config GENERIC_IRQ_MATRIX_ALLOCATOR 105 bool 106 107config GENERIC_IRQ_RESERVATION_MODE 108 bool 109 110# Support forced irq threading 111config IRQ_FORCED_THREADING 112 bool 113 114config SPARSE_IRQ 115 bool "Support sparse irq numbering" if MAY_HAVE_SPARSE_IRQ 116 ---help--- 117 118 Sparse irq numbering is useful for distro kernels that want 119 to define a high CONFIG_NR_CPUS value but still want to have 120 low kernel memory footprint on smaller machines. 121 122 ( Sparse irqs can also be beneficial on NUMA boxes, as they spread 123 out the interrupt descriptors in a more NUMA-friendly way. ) 124 125 If you don't know what to do here, say N. 126 127config GENERIC_IRQ_DEBUGFS 128 bool "Expose irq internals in debugfs" 129 depends on DEBUG_FS 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