[mirror_ubuntu-jammy-kernel.git] / kernel / irq / Kconfig

# 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
       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 hierarchical fasteoi+edge and fasteoi+level handlers
config IRQ_FASTEOI_HIERARCHY_HANDLERS
	bool

# Generic IRQ IPI support
config GENERIC_IRQ_IPI
	bool
	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 HANDLE_DOMAIN_IRQ
	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.
Commit	Line	Data
ec8f24b7	1	# SPDX-License-Identifier: GPL-2.0-only
d9817ebe	2	menu "IRQ subsystem"
d9817ebe	3	# Options selectable by the architecture code
c68fd4f3 TG	4
c68fd4f3 TG	5	# Make sparse irq Kconfig switch below available
2ed86b16	6	config MAY_HAVE_SPARSE_IRQ
fd4afaf3	7	bool
d9817ebe	8
c940e01c TG	9	# Legacy support, required for itanic
	10	config GENERIC_IRQ_LEGACY
	11	bool
	12
c68fd4f3	13	# Enable the generic irq autoprobe mechanism
d9817ebe	14	config GENERIC_IRQ_PROBE
fd4afaf3	15	bool
d9817ebe	16
c68fd4f3	17	# Use the generic /proc/interrupts implementation
c78b9b65	18	config GENERIC_IRQ_SHOW
fd4afaf3	19	bool
c78b9b65	20
ab7798ff TG	21	# Print level/edge extra information
	22	config GENERIC_IRQ_SHOW_LEVEL
	23	bool
	24
0d3f5425 TG	25	# Supports effective affinity mask
	26	config GENERIC_IRQ_EFFECTIVE_AFF_MASK
	27	bool
	28
c68fd4f3	29	# Support for delayed migration from interrupt context
d9817ebe	30	config GENERIC_PENDING_IRQ
fd4afaf3	31	bool
d9817ebe	32
f1e0bb0a YY	33	# Support for generic irq migrating off cpu before the cpu is offline.
	34	config GENERIC_IRQ_MIGRATION
	35	bool
	36
c68fd4f3	37	# Alpha specific irq affinity mechanism
d9817ebe	38	config AUTO_IRQ_AFFINITY
fd4afaf3	39	bool
d9817ebe	40
acd26bcf TG	41	# Interrupt injection mechanism
	42	config GENERIC_IRQ_INJECTION
	43	bool
	44
c68fd4f3	45	# Tasklet based software resend for pending interrupts on enable_irq()
d9817ebe	46	config HARDIRQS_SW_RESEND
fd4afaf3	47	bool
d9817ebe	48
0521c8fb TG	49	# Edge style eoi based handler (cell)
	50	config IRQ_EDGE_EOI_HANDLER
	51	bool
	52
c42321c7 TG	53	# Generic configurable interrupt chip implementation
	54	config GENERIC_IRQ_CHIP
	55	bool
923fa4ea	56	select IRQ_DOMAIN
c42321c7	57
08a543ad GL	58	# Generic irq_domain hw <--> linux irq number translation
	59	config IRQ_DOMAIN
	60	bool
	61
b19af510 BG	62	# Support for simulated interrupts
	63	config IRQ_SIM
	64	bool
	65	select IRQ_WORK
337cbeb2	66	select IRQ_DOMAIN
b19af510	67
f8264e34 JL	68	# Support for hierarchical irq domains
	69	config IRQ_DOMAIN_HIERARCHY
	70	bool
	71	select IRQ_DOMAIN
	72
7703b08c DD	73	# Support for hierarchical fasteoi+edge and fasteoi+level handlers
	74	config IRQ_FASTEOI_HIERARCHY_HANDLERS
	75	bool
	76
379b6564 QY	77	# Generic IRQ IPI support
	78	config GENERIC_IRQ_IPI
	79	bool
151a5351	80	select IRQ_DOMAIN_HIERARCHY
379b6564	81
f3cf8bb0 JL	82	# Generic MSI interrupt support
	83	config GENERIC_MSI_IRQ
	84	bool
	85
	86	# Generic MSI hierarchical interrupt domain support
	87	config GENERIC_MSI_IRQ_DOMAIN
	88	bool
	89	select IRQ_DOMAIN_HIERARCHY
	90	select GENERIC_MSI_IRQ
	91
aaebdf8d JG	92	config IRQ_MSI_IOMMU
	93	bool
	94
76ba59f8 MZ	95	config HANDLE_DOMAIN_IRQ
	96	bool
	97
b2d3d61a DL	98	config IRQ_TIMINGS
	99	bool
	100
2f75d9e1 TG	101	config GENERIC_IRQ_MATRIX_ALLOCATOR
	102	bool
	103
2b5175c4 TG	104	config GENERIC_IRQ_RESERVATION_MODE
	105	bool
	106
c68fd4f3	107	# Support forced irq threading
8d32a307 TG	108	config IRQ_FORCED_THREADING
	109	bool
	110
d9817ebe	111	config SPARSE_IRQ
2ed86b16	112	bool "Support sparse irq numbering" if MAY_HAVE_SPARSE_IRQ
a7f7f624	113	help
d9817ebe TG	114
	115	Sparse irq numbering is useful for distro kernels that want
	116	to define a high CONFIG_NR_CPUS value but still want to have
	117	low kernel memory footprint on smaller machines.
	118
	119	( Sparse irqs can also be beneficial on NUMA boxes, as they spread
	120	out the interrupt descriptors in a more NUMA-friendly way. )
	121
	122	If you don't know what to do here, say N.
	123
087cdfb6 TG	124	config GENERIC_IRQ_DEBUGFS
	125	bool "Expose irq internals in debugfs"
	126	depends on DEBUG_FS
acd26bcf	127	select GENERIC_IRQ_INJECTION
087cdfb6	128	default n
a7f7f624	129	help
087cdfb6 TG	130
	131	Exposes internal state information through debugfs. Mostly for
	132	developers and debugging of hard to diagnose interrupt problems.
	133
	134	If you don't know what to do here, say N.
	135
d9817ebe	136	endmenu
caacdbf4 PD	137
	138	config GENERIC_IRQ_MULTI_HANDLER
	139	bool
	140	help
	141	Allow to specify the low level IRQ handler at run time.