1menu "IRQ subsystem" 2# Options selectable by the architecture code 3 4# Make sparse irq Kconfig switch below available 5config MAY_HAVE_SPARSE_IRQ 6 bool 7 8# Enable the generic irq autoprobe mechanism 9config GENERIC_IRQ_PROBE 10 bool 11 12# Use the generic /proc/interrupts implementation 13config GENERIC_IRQ_SHOW 14 bool 15 16# Print level/edge extra information 17config GENERIC_IRQ_SHOW_LEVEL 18 bool 19 20# Support for delayed migration from interrupt context 21config GENERIC_PENDING_IRQ 22 bool 23 24# Alpha specific irq affinity mechanism 25config AUTO_IRQ_AFFINITY 26 bool 27 28# Tasklet based software resend for pending interrupts on enable_irq() 29config HARDIRQS_SW_RESEND 30 bool 31 32# Preflow handler support for fasteoi (sparc64) 33config IRQ_PREFLOW_FASTEOI 34 bool 35 36# Edge style eoi based handler (cell) 37config IRQ_EDGE_EOI_HANDLER 38 bool 39 40# Generic configurable interrupt chip implementation 41config GENERIC_IRQ_CHIP 42 bool 43 44# Generic irq_domain hw <--> linux irq number translation 45config IRQ_DOMAIN 46 bool 47 48config IRQ_DOMAIN_DEBUG 49 bool "Expose hardware/virtual IRQ mapping via debugfs" 50 depends on IRQ_DOMAIN && DEBUG_FS 51 help 52 This option will show the mapping relationship between hardware irq 53 numbers and Linux irq numbers. The mapping is exposed via debugfs 54 in the file "irq_domain_mapping". 55 56 If you don't know what this means you don't need it. 57 58# Support forced irq threading 59config IRQ_FORCED_THREADING 60 bool 61 62config SPARSE_IRQ 63 bool "Support sparse irq numbering" if MAY_HAVE_SPARSE_IRQ 64 ---help--- 65 66 Sparse irq numbering is useful for distro kernels that want 67 to define a high CONFIG_NR_CPUS value but still want to have 68 low kernel memory footprint on smaller machines. 69 70 ( Sparse irqs can also be beneficial on NUMA boxes, as they spread 71 out the interrupt descriptors in a more NUMA-friendly way. ) 72 73 If you don't know what to do here, say N. 74 75endmenu 76