linux/kernel/debug/kdb
Mike Travis 8daaa5f826 kdb: Add support for external NMI handler to call KGDB/KDB
This patch adds a kgdb_nmicallin() interface that can be used by
external NMI handlers to call the KGDB/KDB handler.  The primary
need for this is for those types of NMI interrupts where all the
CPUs have already received the NMI signal.  Therefore no
send_IPI(NMI) is required, and in fact it will cause a 2nd
unhandled NMI to occur. This generates the "Dazed and Confuzed"
messages.

Since all the CPUs are getting the NMI at roughly the same time,
it's not guaranteed that the first CPU that hits the NMI handler
will manage to enter KGDB and set the dbg_master_lock before the
slaves start entering. The new argument "send_ready" was added
for KGDB to signal the NMI handler to release the slave CPUs for
entry into KGDB.

Signed-off-by: Mike Travis <travis@sgi.com>
Acked-by: Jason Wessel <jason.wessel@windriver.com>
Reviewed-by: Dimitri Sivanich <sivanich@sgi.com>
Reviewed-by: Hedi Berriche <hedi@sgi.com>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Arnaldo Carvalho de Melo <acme@ghostprotocols.net>
Link: http://lkml.kernel.org/r/20131002151417.928886849@asylum.americas.sgi.com
Signed-off-by: Ingo Molnar <mingo@kernel.org>
2013-10-03 18:47:54 +02:00
..
.gitignore kdb: core for kgdb back end (1 of 2) 2010-05-20 21:04:20 -05:00
kdb_bp.c kdb: Remove unhandled ssb command 2013-03-02 08:52:20 -06:00
kdb_bt.c kdb: Fix dmesg/bta scroll to quit with 'q' 2012-10-12 06:37:35 -05:00
kdb_cmds kdb: cleanup unused variables missed in the original kdb merge 2011-08-01 13:23:58 -05:00
kdb_debugger.c kdb: Add support for external NMI handler to call KGDB/KDB 2013-10-03 18:47:54 +02:00
kdb_io.c kdb,vt_console: Fix missed data due to pager overruns 2012-10-12 06:37:35 -05:00
kdb_keyboard.c KDB: Fix usability issues relating to the 'enter' key. 2012-03-22 15:07:15 -05:00
kdb_main.c kdb: Add support for external NMI handler to call KGDB/KDB 2013-10-03 18:47:54 +02:00
kdb_private.h kdb: Remove unhandled ssb command 2013-03-02 08:52:20 -06:00
kdb_support.c kdb: remove the second argument of k[un]map_atomic() 2012-03-20 21:48:26 +08:00
Makefile kgdboc,keyboard: Keyboard driver for kdb with kgdb 2010-05-20 21:04:24 -05:00