1d9817ebeSThomas Gleixnermenu "IRQ subsystem" 2d9817ebeSThomas Gleixner# Options selectable by the architecture code 3c68fd4f3SThomas Gleixner 4c68fd4f3SThomas Gleixner# Make sparse irq Kconfig switch below available 52ed86b16SRob Herringconfig MAY_HAVE_SPARSE_IRQ 6fd4afaf3SJan Beulich bool 7d9817ebeSThomas Gleixner 8c940e01cSThomas Gleixner# Legacy support, required for itanic 9c940e01cSThomas Gleixnerconfig GENERIC_IRQ_LEGACY 10c940e01cSThomas Gleixner bool 11c940e01cSThomas Gleixner 12c68fd4f3SThomas Gleixner# Enable the generic irq autoprobe mechanism 13d9817ebeSThomas Gleixnerconfig GENERIC_IRQ_PROBE 14fd4afaf3SJan Beulich bool 15d9817ebeSThomas Gleixner 16c68fd4f3SThomas Gleixner# Use the generic /proc/interrupts implementation 17c78b9b65SThomas Gleixnerconfig GENERIC_IRQ_SHOW 18fd4afaf3SJan Beulich bool 19c78b9b65SThomas Gleixner 20ab7798ffSThomas Gleixner# Print level/edge extra information 21ab7798ffSThomas Gleixnerconfig GENERIC_IRQ_SHOW_LEVEL 22ab7798ffSThomas Gleixner bool 23ab7798ffSThomas Gleixner 240d3f5425SThomas Gleixner# Supports effective affinity mask 250d3f5425SThomas Gleixnerconfig GENERIC_IRQ_EFFECTIVE_AFF_MASK 260d3f5425SThomas Gleixner bool 270d3f5425SThomas Gleixner 287b6ef126SThomas Gleixner# Facility to allocate a hardware interrupt. This is legacy support 297b6ef126SThomas Gleixner# and should not be used in new code. Use irq domains instead. 307b6ef126SThomas Gleixnerconfig GENERIC_IRQ_LEGACY_ALLOC_HWIRQ 317b6ef126SThomas Gleixner bool 327b6ef126SThomas Gleixner 33c68fd4f3SThomas Gleixner# Support for delayed migration from interrupt context 34d9817ebeSThomas Gleixnerconfig GENERIC_PENDING_IRQ 35fd4afaf3SJan Beulich bool 36d9817ebeSThomas Gleixner 37f1e0bb0aSYang Yingliang# Support for generic irq migrating off cpu before the cpu is offline. 38f1e0bb0aSYang Yingliangconfig GENERIC_IRQ_MIGRATION 39f1e0bb0aSYang Yingliang bool 40f1e0bb0aSYang Yingliang 41c68fd4f3SThomas Gleixner# Alpha specific irq affinity mechanism 42d9817ebeSThomas Gleixnerconfig AUTO_IRQ_AFFINITY 43fd4afaf3SJan Beulich bool 44d9817ebeSThomas Gleixner 45c68fd4f3SThomas Gleixner# Tasklet based software resend for pending interrupts on enable_irq() 46d9817ebeSThomas Gleixnerconfig HARDIRQS_SW_RESEND 47fd4afaf3SJan Beulich bool 48d9817ebeSThomas Gleixner 49c68fd4f3SThomas Gleixner# Preflow handler support for fasteoi (sparc64) 5078129576SThomas Gleixnerconfig IRQ_PREFLOW_FASTEOI 51fd4afaf3SJan Beulich bool 5278129576SThomas Gleixner 530521c8fbSThomas Gleixner# Edge style eoi based handler (cell) 540521c8fbSThomas Gleixnerconfig IRQ_EDGE_EOI_HANDLER 550521c8fbSThomas Gleixner bool 560521c8fbSThomas Gleixner 57c42321c7SThomas Gleixner# Generic configurable interrupt chip implementation 58c42321c7SThomas Gleixnerconfig GENERIC_IRQ_CHIP 59c42321c7SThomas Gleixner bool 60923fa4eaSNitin A Kamble select IRQ_DOMAIN 61c42321c7SThomas Gleixner 6208a543adSGrant Likely# Generic irq_domain hw <--> linux irq number translation 6308a543adSGrant Likelyconfig IRQ_DOMAIN 6408a543adSGrant Likely bool 6508a543adSGrant Likely 66b19af510SBartosz Golaszewski# Support for simulated interrupts 67b19af510SBartosz Golaszewskiconfig IRQ_SIM 68b19af510SBartosz Golaszewski bool 69b19af510SBartosz Golaszewski select IRQ_WORK 70b19af510SBartosz Golaszewski 71f8264e34SJiang Liu# Support for hierarchical irq domains 72f8264e34SJiang Liuconfig IRQ_DOMAIN_HIERARCHY 73f8264e34SJiang Liu bool 74f8264e34SJiang Liu select IRQ_DOMAIN 75f8264e34SJiang Liu 76*7703b08cSDavid Daney# Support for hierarchical fasteoi+edge and fasteoi+level handlers 77*7703b08cSDavid Daneyconfig IRQ_FASTEOI_HIERARCHY_HANDLERS 78*7703b08cSDavid Daney bool 79*7703b08cSDavid Daney 80379b6564SQais Yousef# Generic IRQ IPI support 81379b6564SQais Yousefconfig GENERIC_IRQ_IPI 82379b6564SQais Yousef bool 83379b6564SQais Yousef 84f3cf8bb0SJiang Liu# Generic MSI interrupt support 85f3cf8bb0SJiang Liuconfig GENERIC_MSI_IRQ 86f3cf8bb0SJiang Liu bool 87f3cf8bb0SJiang Liu 88f3cf8bb0SJiang Liu# Generic MSI hierarchical interrupt domain support 89f3cf8bb0SJiang Liuconfig GENERIC_MSI_IRQ_DOMAIN 90f3cf8bb0SJiang Liu bool 91f3cf8bb0SJiang Liu select IRQ_DOMAIN_HIERARCHY 92f3cf8bb0SJiang Liu select GENERIC_MSI_IRQ 93f3cf8bb0SJiang Liu 9476ba59f8SMarc Zyngierconfig HANDLE_DOMAIN_IRQ 9576ba59f8SMarc Zyngier bool 9676ba59f8SMarc Zyngier 97b2d3d61aSDaniel Lezcanoconfig IRQ_TIMINGS 98b2d3d61aSDaniel Lezcano bool 99b2d3d61aSDaniel Lezcano 100092b2fb0SGrant Likelyconfig IRQ_DOMAIN_DEBUG 101092b2fb0SGrant Likely bool "Expose hardware/virtual IRQ mapping via debugfs" 102092b2fb0SGrant Likely depends on IRQ_DOMAIN && DEBUG_FS 103092b2fb0SGrant Likely help 104092b2fb0SGrant Likely This option will show the mapping relationship between hardware irq 105092b2fb0SGrant Likely numbers and Linux irq numbers. The mapping is exposed via debugfs 106ac5830a3SMika Westerberg in the file "irq_domain_mapping". 107092b2fb0SGrant Likely 108092b2fb0SGrant Likely If you don't know what this means you don't need it. 109092b2fb0SGrant Likely 110c68fd4f3SThomas Gleixner# Support forced irq threading 1118d32a307SThomas Gleixnerconfig IRQ_FORCED_THREADING 1128d32a307SThomas Gleixner bool 1138d32a307SThomas Gleixner 114d9817ebeSThomas Gleixnerconfig SPARSE_IRQ 1152ed86b16SRob Herring bool "Support sparse irq numbering" if MAY_HAVE_SPARSE_IRQ 116d9817ebeSThomas Gleixner ---help--- 117d9817ebeSThomas Gleixner 118d9817ebeSThomas Gleixner Sparse irq numbering is useful for distro kernels that want 119d9817ebeSThomas Gleixner to define a high CONFIG_NR_CPUS value but still want to have 120d9817ebeSThomas Gleixner low kernel memory footprint on smaller machines. 121d9817ebeSThomas Gleixner 122d9817ebeSThomas Gleixner ( Sparse irqs can also be beneficial on NUMA boxes, as they spread 123d9817ebeSThomas Gleixner out the interrupt descriptors in a more NUMA-friendly way. ) 124d9817ebeSThomas Gleixner 125d9817ebeSThomas Gleixner If you don't know what to do here, say N. 126d9817ebeSThomas Gleixner 127087cdfb6SThomas Gleixnerconfig GENERIC_IRQ_DEBUGFS 128087cdfb6SThomas Gleixner bool "Expose irq internals in debugfs" 129087cdfb6SThomas Gleixner depends on DEBUG_FS 130087cdfb6SThomas Gleixner default n 131087cdfb6SThomas Gleixner ---help--- 132087cdfb6SThomas Gleixner 133087cdfb6SThomas Gleixner Exposes internal state information through debugfs. Mostly for 134087cdfb6SThomas Gleixner developers and debugging of hard to diagnose interrupt problems. 135087cdfb6SThomas Gleixner 136087cdfb6SThomas Gleixner If you don't know what to do here, say N. 137087cdfb6SThomas Gleixner 138d9817ebeSThomas Gleixnerendmenu 139