| Kyle Swenson | 8d8f654 | 2021-03-15 11:02:55 -0600 | [diff] [blame^] | 1 | menu "IRQ subsystem" |
| 2 | # Options selectable by the architecture code |
| 3 | |
| 4 | # Make sparse irq Kconfig switch below available |
| 5 | config MAY_HAVE_SPARSE_IRQ |
| 6 | bool |
| 7 | |
| 8 | # Legacy support, required for itanic |
| 9 | config GENERIC_IRQ_LEGACY |
| 10 | bool |
| 11 | |
| 12 | # Enable the generic irq autoprobe mechanism |
| 13 | config GENERIC_IRQ_PROBE |
| 14 | bool |
| 15 | |
| 16 | # Use the generic /proc/interrupts implementation |
| 17 | config GENERIC_IRQ_SHOW |
| 18 | bool |
| 19 | |
| 20 | # Print level/edge extra information |
| 21 | config GENERIC_IRQ_SHOW_LEVEL |
| 22 | bool |
| 23 | |
| 24 | # Facility to allocate a hardware interrupt. This is legacy support |
| 25 | # and should not be used in new code. Use irq domains instead. |
| 26 | config GENERIC_IRQ_LEGACY_ALLOC_HWIRQ |
| 27 | bool |
| 28 | |
| 29 | # Support for delayed migration from interrupt context |
| 30 | config GENERIC_PENDING_IRQ |
| 31 | bool |
| 32 | |
| 33 | # Support for generic irq migrating off cpu before the cpu is offline. |
| 34 | config GENERIC_IRQ_MIGRATION |
| 35 | bool |
| 36 | |
| 37 | # Alpha specific irq affinity mechanism |
| 38 | config AUTO_IRQ_AFFINITY |
| 39 | bool |
| 40 | |
| 41 | # Tasklet based software resend for pending interrupts on enable_irq() |
| 42 | config HARDIRQS_SW_RESEND |
| 43 | bool |
| 44 | |
| 45 | # Preflow handler support for fasteoi (sparc64) |
| 46 | config IRQ_PREFLOW_FASTEOI |
| 47 | bool |
| 48 | |
| 49 | # Edge style eoi based handler (cell) |
| 50 | config IRQ_EDGE_EOI_HANDLER |
| 51 | bool |
| 52 | |
| 53 | # Generic configurable interrupt chip implementation |
| 54 | config GENERIC_IRQ_CHIP |
| 55 | bool |
| 56 | select IRQ_DOMAIN |
| 57 | |
| 58 | # Generic irq_domain hw <--> linux irq number translation |
| 59 | config IRQ_DOMAIN |
| 60 | bool |
| 61 | |
| 62 | # Support for hierarchical irq domains |
| 63 | config IRQ_DOMAIN_HIERARCHY |
| 64 | bool |
| 65 | select IRQ_DOMAIN |
| 66 | |
| 67 | # Generic MSI interrupt support |
| 68 | config GENERIC_MSI_IRQ |
| 69 | bool |
| 70 | |
| 71 | # Generic MSI hierarchical interrupt domain support |
| 72 | config GENERIC_MSI_IRQ_DOMAIN |
| 73 | bool |
| 74 | select IRQ_DOMAIN_HIERARCHY |
| 75 | select GENERIC_MSI_IRQ |
| 76 | |
| 77 | config HANDLE_DOMAIN_IRQ |
| 78 | bool |
| 79 | |
| 80 | config IRQ_DOMAIN_DEBUG |
| 81 | bool "Expose hardware/virtual IRQ mapping via debugfs" |
| 82 | depends on IRQ_DOMAIN && DEBUG_FS |
| 83 | help |
| 84 | This option will show the mapping relationship between hardware irq |
| 85 | numbers and Linux irq numbers. The mapping is exposed via debugfs |
| 86 | in the file "irq_domain_mapping". |
| 87 | |
| 88 | If you don't know what this means you don't need it. |
| 89 | |
| 90 | # Support forced irq threading |
| 91 | config IRQ_FORCED_THREADING |
| 92 | bool |
| 93 | |
| 94 | config SPARSE_IRQ |
| 95 | bool "Support sparse irq numbering" if MAY_HAVE_SPARSE_IRQ |
| 96 | ---help--- |
| 97 | |
| 98 | Sparse irq numbering is useful for distro kernels that want |
| 99 | to define a high CONFIG_NR_CPUS value but still want to have |
| 100 | low kernel memory footprint on smaller machines. |
| 101 | |
| 102 | ( Sparse irqs can also be beneficial on NUMA boxes, as they spread |
| 103 | out the interrupt descriptors in a more NUMA-friendly way. ) |
| 104 | |
| 105 | If you don't know what to do here, say N. |
| 106 | |
| 107 | endmenu |