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- # SPDX-License-Identifier: GPL-2.0-only
- 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
- # Supports effective affinity mask
- config GENERIC_IRQ_EFFECTIVE_AFF_MASK
- depends on SMP
- 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
- # Interrupt injection mechanism
- config GENERIC_IRQ_INJECTION
- bool
- # Tasklet based software resend for pending interrupts on enable_irq()
- config HARDIRQS_SW_RESEND
- 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 simulated interrupts
- config IRQ_SIM
- bool
- select IRQ_WORK
- select IRQ_DOMAIN
- # Support for hierarchical irq domains
- config IRQ_DOMAIN_HIERARCHY
- bool
- select IRQ_DOMAIN
- # Support for obsolete non-mapping irq domains
- config IRQ_DOMAIN_NOMAP
- bool
- select IRQ_DOMAIN
- # Support for hierarchical fasteoi+edge and fasteoi+level handlers
- config IRQ_FASTEOI_HIERARCHY_HANDLERS
- bool
- # Generic IRQ IPI support
- config GENERIC_IRQ_IPI
- bool
- depends on SMP
- select IRQ_DOMAIN_HIERARCHY
- # 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 IRQ_MSI_IOMMU
- bool
- config IRQ_TIMINGS
- bool
- config GENERIC_IRQ_MATRIX_ALLOCATOR
- bool
- config GENERIC_IRQ_RESERVATION_MODE
- bool
- # 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.
- config GENERIC_IRQ_DEBUGFS
- bool "Expose irq internals in debugfs"
- depends on DEBUG_FS
- select GENERIC_IRQ_INJECTION
- default n
- help
- Exposes internal state information through debugfs. Mostly for
- developers and debugging of hard to diagnose interrupt problems.
- If you don't know what to do here, say N.
- endmenu
- config GENERIC_IRQ_MULTI_HANDLER
- bool
- help
- Allow to specify the low level IRQ handler at run time.
- # Cavium Octeon is the last system to use this deprecated option
- # Do not even think of enabling this on any new platform
- config DEPRECATED_IRQ_CPU_ONOFFLINE
- bool
- depends on CAVIUM_OCTEON_SOC
- default CAVIUM_OCTEON_SOC
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