1# SPDX-License-Identifier: GPL-2.0-only
  2menu "IRQ subsystem"
  3# Options selectable by the architecture code
  4
  5# Make sparse irq Kconfig switch below available
  6config MAY_HAVE_SPARSE_IRQ
  7       bool
  8
  9# Legacy support, required for itanic
 10config GENERIC_IRQ_LEGACY
 11       bool
 12
 13# Enable the generic irq autoprobe mechanism
 14config GENERIC_IRQ_PROBE
 15	bool
 16
 17# Use the generic /proc/interrupts implementation
 18config GENERIC_IRQ_SHOW
 19       bool
 20
 21# Print level/edge extra information
 22config GENERIC_IRQ_SHOW_LEVEL
 23       bool
 24
 25# Supports effective affinity mask
 26config GENERIC_IRQ_EFFECTIVE_AFF_MASK
 27       bool
 28
 29# Facility to allocate a hardware interrupt. This is legacy support
 30# and should not be used in new code. Use irq domains instead.
 31config GENERIC_IRQ_LEGACY_ALLOC_HWIRQ
 32       bool
 33
 34# Support for delayed migration from interrupt context
 35config GENERIC_PENDING_IRQ
 36	bool
 37
 38# Support for generic irq migrating off cpu before the cpu is offline.
 39config GENERIC_IRQ_MIGRATION
 40	bool
 41
 42# Alpha specific irq affinity mechanism
 43config AUTO_IRQ_AFFINITY
 44       bool
 45
 
 
 
 
 46# Tasklet based software resend for pending interrupts on enable_irq()
 47config HARDIRQS_SW_RESEND
 48       bool
 49
 50# Preflow handler support for fasteoi (sparc64)
 51config IRQ_PREFLOW_FASTEOI
 52       bool
 53
 54# Edge style eoi based handler (cell)
 55config IRQ_EDGE_EOI_HANDLER
 56       bool
 57
 58# Generic configurable interrupt chip implementation
 59config GENERIC_IRQ_CHIP
 60       bool
 61       select IRQ_DOMAIN
 62
 63# Generic irq_domain hw <--> linux irq number translation
 64config IRQ_DOMAIN
 65	bool
 66
 67# Support for simulated interrupts
 68config IRQ_SIM
 69	bool
 70	select IRQ_WORK
 
 71
 72# Support for hierarchical irq domains
 73config IRQ_DOMAIN_HIERARCHY
 74	bool
 75	select IRQ_DOMAIN
 76
 
 
 
 
 
 77# Support for hierarchical fasteoi+edge and fasteoi+level handlers
 78config IRQ_FASTEOI_HIERARCHY_HANDLERS
 79	bool
 80
 81# Generic IRQ IPI support
 82config GENERIC_IRQ_IPI
 83	bool
 84
 85# Generic MSI interrupt support
 86config GENERIC_MSI_IRQ
 87	bool
 88
 89# Generic MSI hierarchical interrupt domain support
 90config GENERIC_MSI_IRQ_DOMAIN
 91	bool
 92	select IRQ_DOMAIN_HIERARCHY
 93	select GENERIC_MSI_IRQ
 94
 95config IRQ_MSI_IOMMU
 96	bool
 97
 98config HANDLE_DOMAIN_IRQ
 99	bool
100
101config IRQ_TIMINGS
102	bool
103
104config GENERIC_IRQ_MATRIX_ALLOCATOR
105	bool
106
107config GENERIC_IRQ_RESERVATION_MODE
108	bool
109
110# Support forced irq threading
111config IRQ_FORCED_THREADING
112       bool
113
114config SPARSE_IRQ
115	bool "Support sparse irq numbering" if MAY_HAVE_SPARSE_IRQ
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
127config 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
138endmenu
139
140config GENERIC_IRQ_MULTI_HANDLER
141	bool
142	help
143	  Allow to specify the low level IRQ handler at run time.

  1# SPDX-License-Identifier: GPL-2.0-only
  2menu "IRQ subsystem"
  3# Options selectable by the architecture code
  4
  5# Make sparse irq Kconfig switch below available
  6config MAY_HAVE_SPARSE_IRQ
  7       bool
  8
  9# Legacy support, required for itanic
 10config GENERIC_IRQ_LEGACY
 11       bool
 12
 13# Enable the generic irq autoprobe mechanism
 14config GENERIC_IRQ_PROBE
 15	bool
 16
 17# Use the generic /proc/interrupts implementation
 18config GENERIC_IRQ_SHOW
 19       bool
 20
 21# Print level/edge extra information
 22config GENERIC_IRQ_SHOW_LEVEL
 23       bool
 24
 25# Supports effective affinity mask
 26config GENERIC_IRQ_EFFECTIVE_AFF_MASK
 27       depends on SMP
 
 
 
 
 28       bool
 29
 30# Support for delayed migration from interrupt context
 31config GENERIC_PENDING_IRQ
 32	bool
 33
 34# Support for generic irq migrating off cpu before the cpu is offline.
 35config GENERIC_IRQ_MIGRATION
 36	bool
 37
 38# Alpha specific irq affinity mechanism
 39config AUTO_IRQ_AFFINITY
 40       bool
 41
 42# Interrupt injection mechanism
 43config GENERIC_IRQ_INJECTION
 44	bool
 45
 46# Tasklet based software resend for pending interrupts on enable_irq()
 47config HARDIRQS_SW_RESEND
 48       bool
 49
 
 
 
 
 50# Edge style eoi based handler (cell)
 51config IRQ_EDGE_EOI_HANDLER
 52       bool
 53
 54# Generic configurable interrupt chip implementation
 55config GENERIC_IRQ_CHIP
 56       bool
 57       select IRQ_DOMAIN
 58
 59# Generic irq_domain hw <--> linux irq number translation
 60config IRQ_DOMAIN
 61	bool
 62
 63# Support for simulated interrupts
 64config IRQ_SIM
 65	bool
 66	select IRQ_WORK
 67	select IRQ_DOMAIN
 68
 69# Support for hierarchical irq domains
 70config IRQ_DOMAIN_HIERARCHY
 71	bool
 72	select IRQ_DOMAIN
 73
 74# Support for obsolete non-mapping irq domains
 75config IRQ_DOMAIN_NOMAP
 76	bool
 77	select IRQ_DOMAIN
 78
 79# Support for hierarchical fasteoi+edge and fasteoi+level handlers
 80config IRQ_FASTEOI_HIERARCHY_HANDLERS
 81	bool
 82
 83# Generic IRQ IPI support
 84config GENERIC_IRQ_IPI
 85	bool
 86	depends on SMP
 87	select IRQ_DOMAIN_HIERARCHY
 
 
 88
 89# Generic MSI hierarchical interrupt domain support
 90config GENERIC_MSI_IRQ
 91	bool
 92	select IRQ_DOMAIN_HIERARCHY
 
 93
 94config IRQ_MSI_IOMMU
 95	bool
 96
 
 
 
 97config IRQ_TIMINGS
 98	bool
 99
100config GENERIC_IRQ_MATRIX_ALLOCATOR
101	bool
102
103config GENERIC_IRQ_RESERVATION_MODE
104	bool
105
106# Support forced irq threading
107config IRQ_FORCED_THREADING
108       bool
109
110config SPARSE_IRQ
111	bool "Support sparse irq numbering" if MAY_HAVE_SPARSE_IRQ
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
123config GENERIC_IRQ_DEBUGFS
124	bool "Expose irq internals in debugfs"
125	depends on DEBUG_FS
126	select GENERIC_IRQ_INJECTION
127	default n
128	help
129
130	  Exposes internal state information through debugfs. Mostly for
131	  developers and debugging of hard to diagnose interrupt problems.
132
133	  If you don't know what to do here, say N.
134
135endmenu
136
137config GENERIC_IRQ_MULTI_HANDLER
138	bool
139	help
140	  Allow to specify the low level IRQ handler at run time.
141
142# Cavium Octeon is the last system to use this deprecated option
143# Do not even think of enabling this on any new platform
144config DEPRECATED_IRQ_CPU_ONOFFLINE
145	bool
146	depends on CAVIUM_OCTEON_SOC
147	default CAVIUM_OCTEON_SOC