| menu "IRQ subsystem" | |
| # Options selectable by the architecture code | |
| # Make sparse irq Kconfig switch below available | |
| config MAY_HAVE_SPARSE_IRQ | |
| bool | |
| # Legacy support, required for itanic | |
| config GENERIC_IRQ_LEGACY | |
| bool | |
| # Enable the generic irq autoprobe mechanism | |
| config GENERIC_IRQ_PROBE | |
| bool | |
| # Use the generic /proc/interrupts implementation | |
| config GENERIC_IRQ_SHOW | |
| bool | |
| # Print level/edge extra information | |
| config GENERIC_IRQ_SHOW_LEVEL | |
| bool | |
| # Facility to allocate a hardware interrupt. This is legacy support | |
| # and should not be used in new code. Use irq domains instead. | |
| config GENERIC_IRQ_LEGACY_ALLOC_HWIRQ | |
| bool | |
| # Support for delayed migration from interrupt context | |
| config GENERIC_PENDING_IRQ | |
| bool | |
| # Support for generic irq migrating off cpu before the cpu is offline. | |
| config GENERIC_IRQ_MIGRATION | |
| bool | |
| # Alpha specific irq affinity mechanism | |
| config AUTO_IRQ_AFFINITY | |
| bool | |
| # Tasklet based software resend for pending interrupts on enable_irq() | |
| config HARDIRQS_SW_RESEND | |
| bool | |
| # Preflow handler support for fasteoi (sparc64) | |
| config IRQ_PREFLOW_FASTEOI | |
| bool | |
| # Edge style eoi based handler (cell) | |
| config IRQ_EDGE_EOI_HANDLER | |
| bool | |
| # Generic configurable interrupt chip implementation | |
| config GENERIC_IRQ_CHIP | |
| bool | |
| select IRQ_DOMAIN | |
| # Generic irq_domain hw <--> linux irq number translation | |
| config IRQ_DOMAIN | |
| bool | |
| # Support for hierarchical irq domains | |
| config IRQ_DOMAIN_HIERARCHY | |
| bool | |
| select IRQ_DOMAIN | |
| # Generic IRQ IPI support | |
| config GENERIC_IRQ_IPI | |
| bool | |
| # Generic MSI interrupt support | |
| config GENERIC_MSI_IRQ | |
| bool | |
| # Generic MSI hierarchical interrupt domain support | |
| config GENERIC_MSI_IRQ_DOMAIN | |
| bool | |
| select IRQ_DOMAIN_HIERARCHY | |
| select GENERIC_MSI_IRQ | |
| config HANDLE_DOMAIN_IRQ | |
| bool | |
| config IRQ_DOMAIN_DEBUG | |
| bool "Expose hardware/virtual IRQ mapping via debugfs" | |
| depends on IRQ_DOMAIN && DEBUG_FS | |
| help | |
| This option will show the mapping relationship between hardware irq | |
| numbers and Linux irq numbers. The mapping is exposed via debugfs | |
| in the file "irq_domain_mapping". | |
| If you don't know what this means you don't need it. | |
| # Support forced irq threading | |
| config IRQ_FORCED_THREADING | |
| bool | |
| config SPARSE_IRQ | |
| bool "Support sparse irq numbering" if MAY_HAVE_SPARSE_IRQ | |
| ---help--- | |
| Sparse irq numbering is useful for distro kernels that want | |
| to define a high CONFIG_NR_CPUS value but still want to have | |
| low kernel memory footprint on smaller machines. | |
| ( Sparse irqs can also be beneficial on NUMA boxes, as they spread | |
| out the interrupt descriptors in a more NUMA-friendly way. ) | |
| If you don't know what to do here, say N. | |
| endmenu |