[linux-2.6-block.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

# 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 simulated interrupts
config IRQ_SIM
	bool
	select IRQ_WORK

# 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

# 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
	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
7b6ef126 TG	29	# Facility to allocate a hardware interrupt. This is legacy support
	30	# and should not be used in new code. Use irq domains instead.
	31	config GENERIC_IRQ_LEGACY_ALLOC_HWIRQ
	32	bool
	33
c68fd4f3	34	# Support for delayed migration from interrupt context
d9817ebe	35	config GENERIC_PENDING_IRQ
fd4afaf3	36	bool
d9817ebe	37
f1e0bb0a YY	38	# Support for generic irq migrating off cpu before the cpu is offline.
	39	config GENERIC_IRQ_MIGRATION
	40	bool
	41
c68fd4f3	42	# Alpha specific irq affinity mechanism
d9817ebe	43	config AUTO_IRQ_AFFINITY
fd4afaf3	44	bool
d9817ebe	45
c68fd4f3	46	# Tasklet based software resend for pending interrupts on enable_irq()
d9817ebe	47	config HARDIRQS_SW_RESEND
fd4afaf3	48	bool
d9817ebe	49
c68fd4f3	50	# Preflow handler support for fasteoi (sparc64)
78129576	51	config IRQ_PREFLOW_FASTEOI
fd4afaf3	52	bool
78129576	53
0521c8fb TG	54	# Edge style eoi based handler (cell)
	55	config IRQ_EDGE_EOI_HANDLER
	56	bool
	57
c42321c7 TG	58	# Generic configurable interrupt chip implementation
	59	config GENERIC_IRQ_CHIP
	60	bool
923fa4ea	61	select IRQ_DOMAIN
c42321c7	62
08a543ad GL	63	# Generic irq_domain hw <--> linux irq number translation
	64	config IRQ_DOMAIN
	65	bool
	66
b19af510 BG	67	# Support for simulated interrupts
	68	config IRQ_SIM
	69	bool
	70	select IRQ_WORK
	71
f8264e34 JL	72	# Support for hierarchical irq domains
	73	config IRQ_DOMAIN_HIERARCHY
	74	bool
	75	select IRQ_DOMAIN
	76
7703b08c DD	77	# Support for hierarchical fasteoi+edge and fasteoi+level handlers
	78	config IRQ_FASTEOI_HIERARCHY_HANDLERS
	79	bool
	80
379b6564 QY	81	# Generic IRQ IPI support
	82	config GENERIC_IRQ_IPI
	83	bool
	84
f3cf8bb0 JL	85	# Generic MSI interrupt support
	86	config GENERIC_MSI_IRQ
	87	bool
	88
	89	# Generic MSI hierarchical interrupt domain support
	90	config GENERIC_MSI_IRQ_DOMAIN
	91	bool
	92	select IRQ_DOMAIN_HIERARCHY
	93	select GENERIC_MSI_IRQ
	94
aaebdf8d JG	95	config IRQ_MSI_IOMMU
	96	bool
	97
76ba59f8 MZ	98	config HANDLE_DOMAIN_IRQ
	99	bool
	100
b2d3d61a DL	101	config IRQ_TIMINGS
	102	bool
	103
2f75d9e1 TG	104	config GENERIC_IRQ_MATRIX_ALLOCATOR
	105	bool
	106
2b5175c4 TG	107	config GENERIC_IRQ_RESERVATION_MODE
	108	bool
	109
c68fd4f3	110	# Support forced irq threading
8d32a307 TG	111	config IRQ_FORCED_THREADING
	112	bool
	113
d9817ebe	114	config SPARSE_IRQ
2ed86b16	115	bool "Support sparse irq numbering" if MAY_HAVE_SPARSE_IRQ
d9817ebe TG	116	---help---
	117
	118	Sparse irq numbering is useful for distro kernels that want
	119	to define a high CONFIG_NR_CPUS value but still want to have
	120	low kernel memory footprint on smaller machines.
	121
	122	( Sparse irqs can also be beneficial on NUMA boxes, as they spread
	123	out the interrupt descriptors in a more NUMA-friendly way. )
	124
	125	If you don't know what to do here, say N.
	126
087cdfb6 TG	127	config GENERIC_IRQ_DEBUGFS
	128	bool "Expose irq internals in debugfs"
	129	depends on DEBUG_FS
	130	default n
	131	---help---
	132
	133	Exposes internal state information through debugfs. Mostly for
	134	developers and debugging of hard to diagnose interrupt problems.
	135
	136	If you don't know what to do here, say N.
	137
d9817ebe	138	endmenu
caacdbf4 PD	139
	140	config GENERIC_IRQ_MULTI_HANDLER
	141	bool
	142	help
	143	Allow to specify the low level IRQ handler at run time.