[linux-2.6-block.git] / kernel / irq / Kconfig

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 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
d9817ebe	1	menu "IRQ subsystem"
d9817ebe	2	# Options selectable by the architecture code
c68fd4f3 TG	3
c68fd4f3 TG	4	# Make sparse irq Kconfig switch below available
2ed86b16	5	config MAY_HAVE_SPARSE_IRQ
fd4afaf3	6	bool
d9817ebe	7
c940e01c TG	8	# Legacy support, required for itanic
	9	config GENERIC_IRQ_LEGACY
	10	bool
	11
c68fd4f3	12	# Enable the generic irq autoprobe mechanism
d9817ebe	13	config GENERIC_IRQ_PROBE
fd4afaf3	14	bool
d9817ebe	15
c68fd4f3	16	# Use the generic /proc/interrupts implementation
c78b9b65	17	config GENERIC_IRQ_SHOW
fd4afaf3	18	bool
c78b9b65	19
ab7798ff TG	20	# Print level/edge extra information
	21	config GENERIC_IRQ_SHOW_LEVEL
	22	bool
	23
0d3f5425 TG	24	# Supports effective affinity mask
	25	config GENERIC_IRQ_EFFECTIVE_AFF_MASK
	26	bool
	27
7b6ef126 TG	28	# Facility to allocate a hardware interrupt. This is legacy support
	29	# and should not be used in new code. Use irq domains instead.
	30	config GENERIC_IRQ_LEGACY_ALLOC_HWIRQ
	31	bool
	32
c68fd4f3	33	# Support for delayed migration from interrupt context
d9817ebe	34	config GENERIC_PENDING_IRQ
fd4afaf3	35	bool
d9817ebe	36
f1e0bb0a YY	37	# Support for generic irq migrating off cpu before the cpu is offline.
	38	config GENERIC_IRQ_MIGRATION
	39	bool
	40
c68fd4f3	41	# Alpha specific irq affinity mechanism
d9817ebe	42	config AUTO_IRQ_AFFINITY
fd4afaf3	43	bool
d9817ebe	44
c68fd4f3	45	# Tasklet based software resend for pending interrupts on enable_irq()
d9817ebe	46	config HARDIRQS_SW_RESEND
fd4afaf3	47	bool
d9817ebe	48
c68fd4f3	49	# Preflow handler support for fasteoi (sparc64)
78129576	50	config IRQ_PREFLOW_FASTEOI
fd4afaf3	51	bool
78129576	52
0521c8fb TG	53	# Edge style eoi based handler (cell)
	54	config IRQ_EDGE_EOI_HANDLER
	55	bool
	56
c42321c7 TG	57	# Generic configurable interrupt chip implementation
	58	config GENERIC_IRQ_CHIP
	59	bool
923fa4ea	60	select IRQ_DOMAIN
c42321c7	61
08a543ad GL	62	# Generic irq_domain hw <--> linux irq number translation
	63	config IRQ_DOMAIN
	64	bool
	65
b19af510 BG	66	# Support for simulated interrupts
	67	config IRQ_SIM
	68	bool
	69	select IRQ_WORK
	70
f8264e34 JL	71	# Support for hierarchical irq domains
	72	config IRQ_DOMAIN_HIERARCHY
	73	bool
	74	select IRQ_DOMAIN
	75
7703b08c DD	76	# Support for hierarchical fasteoi+edge and fasteoi+level handlers
	77	config IRQ_FASTEOI_HIERARCHY_HANDLERS
	78	bool
	79
379b6564 QY	80	# Generic IRQ IPI support
	81	config GENERIC_IRQ_IPI
	82	bool
	83
f3cf8bb0 JL	84	# Generic MSI interrupt support
	85	config GENERIC_MSI_IRQ
	86	bool
	87
	88	# Generic MSI hierarchical interrupt domain support
	89	config GENERIC_MSI_IRQ_DOMAIN
	90	bool
	91	select IRQ_DOMAIN_HIERARCHY
	92	select GENERIC_MSI_IRQ
	93
76ba59f8 MZ	94	config HANDLE_DOMAIN_IRQ
	95	bool
	96
b2d3d61a DL	97	config IRQ_TIMINGS
	98	bool
	99
2f75d9e1 TG	100	config GENERIC_IRQ_MATRIX_ALLOCATOR
	101	bool
	102
2b5175c4 TG	103	config GENERIC_IRQ_RESERVATION_MODE
	104	bool
	105
c68fd4f3	106	# Support forced irq threading
8d32a307 TG	107	config IRQ_FORCED_THREADING
	108	bool
	109
d9817ebe	110	config SPARSE_IRQ
2ed86b16	111	bool "Support sparse irq numbering" if MAY_HAVE_SPARSE_IRQ
d9817ebe TG	112	---help---
	113
	114	Sparse irq numbering is useful for distro kernels that want
	115	to define a high CONFIG_NR_CPUS value but still want to have
	116	low kernel memory footprint on smaller machines.
	117
	118	( Sparse irqs can also be beneficial on NUMA boxes, as they spread
	119	out the interrupt descriptors in a more NUMA-friendly way. )
	120
	121	If you don't know what to do here, say N.
	122
087cdfb6 TG	123	config GENERIC_IRQ_DEBUGFS
	124	bool "Expose irq internals in debugfs"
	125	depends on DEBUG_FS
	126	default n
	127	---help---
	128
	129	Exposes internal state information through debugfs. Mostly for
	130	developers and debugging of hard to diagnose interrupt problems.
	131
	132	If you don't know what to do here, say N.
	133
d9817ebe	134	endmenu
caacdbf4 PD	135
	136	config GENERIC_IRQ_MULTI_HANDLER
	137	bool
	138	help
	139	Allow to specify the low level IRQ handler at run time.