[POWERPC] Add debugging trigger to Axon MSI code

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This adds some debugging code to the Axon MSI driver.  It creates a
file per MSIC in /sys/kernel/debug/powerpc, which allows the user to
trigger a fake MSI interrupt by writing to the file.

This can be used to test some of the MSI generation path.  In
particular, that the MSIC recognises a write to the MSI address,
generates an interrupt and writes the MSI packet into the ring buffer.

All the code is inside #ifdef DEBUG so it causes no harm unless it's
enabled.

Signed-off-by: Michael Ellerman <michael@ellerman.id.au>
Signed-off-by: Paul Mackerras <paulus@samba.org>

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Michael Ellerman 2008-05-23 14:21:30 +10:00 • committed by Paul Mackerras

parent 475ca391b4

commit 72cac213fd

1 changed files with 58 additions and 0 deletions

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arch/powerpc/platforms/cell/axon_msi.c

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