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[POWERPC] Export virq mapping via debugfs

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This adds a debugfs file "powerpc/virq_mapping", which shows the virtual
to real mapping of irq numbers.  Enable it with CONFIG_VIRQ_DEBUG.

Signed-off-by: Zhang Wei <wei.zhang@freescale.com>
Signed-off-by: Chen Gong <G.Chen@freescale.com>
Signed-off-by: Michael Ellerman <michael@ellerman.id.au>
Signed-off-by: Paul Mackerras <paulus@samba.org>
This commit is contained in:
Michael Ellerman
2007-08-28 18:47:57 +10:00
committed by Paul Mackerras
parent 7866291d4c
commit 60b332e755
2 changed files with 73 additions and 0 deletions
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10
arch/powerpc/Kconfig.debug
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@ -124,6 +124,16 @@ config IRQSTACKS
for handling hard and soft interrupts. This can help avoid
overflowing the process kernel stacks.
config VIRQ_DEBUG
bool "Expose hardware/virtual IRQ mapping via debugfs"
depends on DEBUG_FS && PPC_MERGE
help
This option will show the mapping relationship between hardware irq
numbers and virtual irq numbers. The mapping is exposed via debugfs
in the file powerpc/virq_mapping.
If you don't know what this means you don't need it.
config BDI_SWITCH
bool "Include BDI-2000 user context switcher"
depends on DEBUG_KERNEL && PPC32