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Commit | Line | Data |
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d9817ebe | 1 | menu "IRQ subsystem" |
d9817ebe | 2 | # Options selectable by the architecture code |
c68fd4f3 TG |
3 | |
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 | ||
7b6ef126 TG |
24 | # Facility to allocate a hardware interrupt. This is legacy support |
25 | # and should not be used in new code. Use irq domains instead. | |
26 | config GENERIC_IRQ_LEGACY_ALLOC_HWIRQ | |
27 | bool | |
28 | ||
c68fd4f3 | 29 | # Support for delayed migration from interrupt context |
d9817ebe | 30 | config GENERIC_PENDING_IRQ |
fd4afaf3 | 31 | bool |
d9817ebe | 32 | |
c68fd4f3 | 33 | # Alpha specific irq affinity mechanism |
d9817ebe | 34 | config AUTO_IRQ_AFFINITY |
fd4afaf3 | 35 | bool |
d9817ebe | 36 | |
c68fd4f3 | 37 | # Tasklet based software resend for pending interrupts on enable_irq() |
d9817ebe | 38 | config HARDIRQS_SW_RESEND |
fd4afaf3 | 39 | bool |
d9817ebe | 40 | |
c68fd4f3 | 41 | # Preflow handler support for fasteoi (sparc64) |
78129576 | 42 | config IRQ_PREFLOW_FASTEOI |
fd4afaf3 | 43 | bool |
78129576 | 44 | |
0521c8fb TG |
45 | # Edge style eoi based handler (cell) |
46 | config IRQ_EDGE_EOI_HANDLER | |
47 | bool | |
48 | ||
c42321c7 TG |
49 | # Generic configurable interrupt chip implementation |
50 | config GENERIC_IRQ_CHIP | |
51 | bool | |
923fa4ea | 52 | select IRQ_DOMAIN |
c42321c7 | 53 | |
08a543ad GL |
54 | # Generic irq_domain hw <--> linux irq number translation |
55 | config IRQ_DOMAIN | |
56 | bool | |
57 | ||
092b2fb0 GL |
58 | config IRQ_DOMAIN_DEBUG |
59 | bool "Expose hardware/virtual IRQ mapping via debugfs" | |
60 | depends on IRQ_DOMAIN && DEBUG_FS | |
61 | help | |
62 | This option will show the mapping relationship between hardware irq | |
63 | numbers and Linux irq numbers. The mapping is exposed via debugfs | |
ac5830a3 | 64 | in the file "irq_domain_mapping". |
092b2fb0 GL |
65 | |
66 | If you don't know what this means you don't need it. | |
67 | ||
c68fd4f3 | 68 | # Support forced irq threading |
8d32a307 TG |
69 | config IRQ_FORCED_THREADING |
70 | bool | |
71 | ||
d9817ebe | 72 | config SPARSE_IRQ |
2ed86b16 | 73 | bool "Support sparse irq numbering" if MAY_HAVE_SPARSE_IRQ |
d9817ebe TG |
74 | ---help--- |
75 | ||
76 | Sparse irq numbering is useful for distro kernels that want | |
77 | to define a high CONFIG_NR_CPUS value but still want to have | |
78 | low kernel memory footprint on smaller machines. | |
79 | ||
80 | ( Sparse irqs can also be beneficial on NUMA boxes, as they spread | |
81 | out the interrupt descriptors in a more NUMA-friendly way. ) | |
82 | ||
83 | If you don't know what to do here, say N. | |
84 | ||
85 | endmenu |