This is a work-in-progress set of patches to add support for implementing IPIs using FIQ. Currently KGDB is the only user of this feature although others could easily be added due to the use of notifier chains.
Patches depend on the KGDB NMI/FIQ patch series. I'll send a complete patchset for the KGDB NMI/FIQ shortly after 3.17rc1 comes out.
-- 1.9.3