• Michael Ellerman's avatar
    [POWERPC] Add debugging trigger to Axon MSI code · 72cac213
    Michael Ellerman authored
    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
    Signed-off-by: default avatarMichael Ellerman <michael@ellerman.id.au>
    Signed-off-by: default avatarPaul Mackerras <paulus@samba.org>
axon_msi.c 10.8 KB