Blackfin: implement nmi_watchdog for SMP on BF561

Signed-off-by: Graf Yang <graf.yang@analog.com>
Signed-off-by: Mike Frysinger <vapier@gentoo.org>

1 files changed, 9 insertions, 0 deletions

diff --git a/arch/blackfin/Kconfig.debug b/arch/blackfin/Kconfig.debug
index 87f195ee2e06..1460d7b5edc1 100644
--- a/arch/blackfin/Kconfig.debug
+++ b/arch/blackfin/Kconfig.debug
@@ -238,6 +238,15 @@ config EARLY_PRINTK
           all of this lives in the init section and is thrown away after the
           kernel boots completely.
 
+config NMI_WATCHDOG
+        bool "Enable NMI watchdog to help debugging lockup on SMP"
+        default n
+        depends on (SMP && !BFIN_SCRATCH_REG_RETN)
+        help
+          If any CPU in the system does not execute the period local timer
+          interrupt for more than 5 seconds, then the NMI handler dumps debug
+          information. This information can be used to debug the lockup.
+
 config CPLB_INFO
         bool "Display the CPLB information"
         help