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- 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 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
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