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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 IRQ IPI Mux support
config GENERIC_IRQ_IPI_MUX
bool
depends on SMP
# Generic MSI hierarchical interrupt domain support
config GENERIC_MSI_IRQ
bool
select IRQ_DOMAIN_HIERARCHY
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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