1ec8f24b7SThomas Gleixner# SPDX-License-Identifier: GPL-2.0-only 2d9817ebeSThomas Gleixnermenu "IRQ subsystem" 3d9817ebeSThomas Gleixner# Options selectable by the architecture code 4c68fd4f3SThomas Gleixner 5c68fd4f3SThomas Gleixner# Make sparse irq Kconfig switch below available 62ed86b16SRob Herringconfig MAY_HAVE_SPARSE_IRQ 7fd4afaf3SJan Beulich bool 8d9817ebeSThomas Gleixner 9c940e01cSThomas Gleixner# Legacy support, required for itanic 10c940e01cSThomas Gleixnerconfig GENERIC_IRQ_LEGACY 11c940e01cSThomas Gleixner bool 12c940e01cSThomas Gleixner 13c68fd4f3SThomas Gleixner# Enable the generic irq autoprobe mechanism 14d9817ebeSThomas Gleixnerconfig GENERIC_IRQ_PROBE 15fd4afaf3SJan Beulich bool 16d9817ebeSThomas Gleixner 17c68fd4f3SThomas Gleixner# Use the generic /proc/interrupts implementation 18c78b9b65SThomas Gleixnerconfig GENERIC_IRQ_SHOW 19fd4afaf3SJan Beulich bool 20c78b9b65SThomas Gleixner 21ab7798ffSThomas Gleixner# Print level/edge extra information 22ab7798ffSThomas Gleixnerconfig GENERIC_IRQ_SHOW_LEVEL 23ab7798ffSThomas Gleixner bool 24ab7798ffSThomas Gleixner 250d3f5425SThomas Gleixner# Supports effective affinity mask 260d3f5425SThomas Gleixnerconfig GENERIC_IRQ_EFFECTIVE_AFF_MASK 270d3f5425SThomas Gleixner bool 280d3f5425SThomas Gleixner 297b6ef126SThomas Gleixner# Facility to allocate a hardware interrupt. This is legacy support 307b6ef126SThomas Gleixner# and should not be used in new code. Use irq domains instead. 317b6ef126SThomas Gleixnerconfig GENERIC_IRQ_LEGACY_ALLOC_HWIRQ 327b6ef126SThomas Gleixner bool 337b6ef126SThomas Gleixner 34c68fd4f3SThomas Gleixner# Support for delayed migration from interrupt context 35d9817ebeSThomas Gleixnerconfig GENERIC_PENDING_IRQ 36fd4afaf3SJan Beulich bool 37d9817ebeSThomas Gleixner 38f1e0bb0aSYang Yingliang# Support for generic irq migrating off cpu before the cpu is offline. 39f1e0bb0aSYang Yingliangconfig GENERIC_IRQ_MIGRATION 40f1e0bb0aSYang Yingliang bool 41f1e0bb0aSYang Yingliang 42c68fd4f3SThomas Gleixner# Alpha specific irq affinity mechanism 43d9817ebeSThomas Gleixnerconfig AUTO_IRQ_AFFINITY 44fd4afaf3SJan Beulich bool 45d9817ebeSThomas Gleixner 46acd26bcfSThomas Gleixner# Interrupt injection mechanism 47acd26bcfSThomas Gleixnerconfig GENERIC_IRQ_INJECTION 48acd26bcfSThomas Gleixner bool 49acd26bcfSThomas Gleixner 50c68fd4f3SThomas Gleixner# Tasklet based software resend for pending interrupts on enable_irq() 51d9817ebeSThomas Gleixnerconfig HARDIRQS_SW_RESEND 52fd4afaf3SJan Beulich bool 53d9817ebeSThomas Gleixner 540521c8fbSThomas Gleixner# Edge style eoi based handler (cell) 550521c8fbSThomas Gleixnerconfig IRQ_EDGE_EOI_HANDLER 560521c8fbSThomas Gleixner bool 570521c8fbSThomas Gleixner 58c42321c7SThomas Gleixner# Generic configurable interrupt chip implementation 59c42321c7SThomas Gleixnerconfig GENERIC_IRQ_CHIP 60c42321c7SThomas Gleixner bool 61923fa4eaSNitin A Kamble select IRQ_DOMAIN 62c42321c7SThomas Gleixner 6308a543adSGrant Likely# Generic irq_domain hw <--> linux irq number translation 6408a543adSGrant Likelyconfig IRQ_DOMAIN 6508a543adSGrant Likely bool 6608a543adSGrant Likely 67b19af510SBartosz Golaszewski# Support for simulated interrupts 68b19af510SBartosz Golaszewskiconfig IRQ_SIM 69b19af510SBartosz Golaszewski bool 70b19af510SBartosz Golaszewski select IRQ_WORK 71337cbeb2SBartosz Golaszewski select IRQ_DOMAIN 72b19af510SBartosz Golaszewski 73f8264e34SJiang Liu# Support for hierarchical irq domains 74f8264e34SJiang Liuconfig IRQ_DOMAIN_HIERARCHY 75f8264e34SJiang Liu bool 76f8264e34SJiang Liu select IRQ_DOMAIN 77f8264e34SJiang Liu 787703b08cSDavid Daney# Support for hierarchical fasteoi+edge and fasteoi+level handlers 797703b08cSDavid Daneyconfig IRQ_FASTEOI_HIERARCHY_HANDLERS 807703b08cSDavid Daney bool 817703b08cSDavid Daney 82379b6564SQais Yousef# Generic IRQ IPI support 83379b6564SQais Yousefconfig GENERIC_IRQ_IPI 84379b6564SQais Yousef bool 85*151a5351SMarc Zyngier select IRQ_DOMAIN_HIERARCHY 86379b6564SQais Yousef 87f3cf8bb0SJiang Liu# Generic MSI interrupt support 88f3cf8bb0SJiang Liuconfig GENERIC_MSI_IRQ 89f3cf8bb0SJiang Liu bool 90f3cf8bb0SJiang Liu 91f3cf8bb0SJiang Liu# Generic MSI hierarchical interrupt domain support 92f3cf8bb0SJiang Liuconfig GENERIC_MSI_IRQ_DOMAIN 93f3cf8bb0SJiang Liu bool 94f3cf8bb0SJiang Liu select IRQ_DOMAIN_HIERARCHY 95f3cf8bb0SJiang Liu select GENERIC_MSI_IRQ 96f3cf8bb0SJiang Liu 97aaebdf8dSJulien Grallconfig IRQ_MSI_IOMMU 98aaebdf8dSJulien Grall bool 99aaebdf8dSJulien Grall 10076ba59f8SMarc Zyngierconfig HANDLE_DOMAIN_IRQ 10176ba59f8SMarc Zyngier bool 10276ba59f8SMarc Zyngier 103b2d3d61aSDaniel Lezcanoconfig IRQ_TIMINGS 104b2d3d61aSDaniel Lezcano bool 105b2d3d61aSDaniel Lezcano 1062f75d9e1SThomas Gleixnerconfig GENERIC_IRQ_MATRIX_ALLOCATOR 1072f75d9e1SThomas Gleixner bool 1082f75d9e1SThomas Gleixner 1092b5175c4SThomas Gleixnerconfig GENERIC_IRQ_RESERVATION_MODE 1102b5175c4SThomas Gleixner bool 1112b5175c4SThomas Gleixner 112c68fd4f3SThomas Gleixner# Support forced irq threading 1138d32a307SThomas Gleixnerconfig IRQ_FORCED_THREADING 1148d32a307SThomas Gleixner bool 1158d32a307SThomas Gleixner 116d9817ebeSThomas Gleixnerconfig SPARSE_IRQ 1172ed86b16SRob Herring bool "Support sparse irq numbering" if MAY_HAVE_SPARSE_IRQ 118a7f7f624SMasahiro Yamada help 119d9817ebeSThomas Gleixner 120d9817ebeSThomas Gleixner Sparse irq numbering is useful for distro kernels that want 121d9817ebeSThomas Gleixner to define a high CONFIG_NR_CPUS value but still want to have 122d9817ebeSThomas Gleixner low kernel memory footprint on smaller machines. 123d9817ebeSThomas Gleixner 124d9817ebeSThomas Gleixner ( Sparse irqs can also be beneficial on NUMA boxes, as they spread 125d9817ebeSThomas Gleixner out the interrupt descriptors in a more NUMA-friendly way. ) 126d9817ebeSThomas Gleixner 127d9817ebeSThomas Gleixner If you don't know what to do here, say N. 128d9817ebeSThomas Gleixner 129087cdfb6SThomas Gleixnerconfig GENERIC_IRQ_DEBUGFS 130087cdfb6SThomas Gleixner bool "Expose irq internals in debugfs" 131087cdfb6SThomas Gleixner depends on DEBUG_FS 132acd26bcfSThomas Gleixner select GENERIC_IRQ_INJECTION 133087cdfb6SThomas Gleixner default n 134a7f7f624SMasahiro Yamada help 135087cdfb6SThomas Gleixner 136087cdfb6SThomas Gleixner Exposes internal state information through debugfs. Mostly for 137087cdfb6SThomas Gleixner developers and debugging of hard to diagnose interrupt problems. 138087cdfb6SThomas Gleixner 139087cdfb6SThomas Gleixner If you don't know what to do here, say N. 140087cdfb6SThomas Gleixner 141d9817ebeSThomas Gleixnerendmenu 142caacdbf4SPalmer Dabbelt 143caacdbf4SPalmer Dabbeltconfig GENERIC_IRQ_MULTI_HANDLER 144caacdbf4SPalmer Dabbelt bool 145caacdbf4SPalmer Dabbelt help 146caacdbf4SPalmer Dabbelt Allow to specify the low level IRQ handler at run time. 147