[AVR32] NMI debugging

Change the NMI handler to use the die notifier chain to signal anyone
who cares. Add a simple "nmi debugger" which hooks into this chain and
that may dump registers, task state, etc. when it happens.

Signed-off-by: Haavard Skinnemoen <hskinnemoen@atmel.com>

1 files changed, 5 insertions, 0 deletions

diff --git a/Documentation/kernel-parameters.txt b/Documentation/kernel-parameters.txt
index c4178778e7fd..17fc60e32443 100644
--- a/Documentation/kernel-parameters.txt
+++ b/Documentation/kernel-parameters.txt
@@ -34,6 +34,7 @@ parameter is applicable:
         ALSA    ALSA sound support is enabled.
         APIC    APIC support is enabled.
         APM     Advanced Power Management support is enabled.
+        AVR32   AVR32 architecture is enabled.
         AX25    Appropriate AX.25 support is enabled.
         BLACKFIN Blackfin architecture is enabled.
         DRM     Direct Rendering Management support is enabled.
@@ -1123,6 +1124,10 @@ and is between 256 and 4096 characters. It is defined in the file
                         of returning the full 64-bit number.
                         The default is to return 64-bit inode numbers.
 
+        nmi_debug=      [KNL,AVR32] Specify one or more actions to take
+                        when a NMI is triggered.
+                        Format: [state][,regs][,debounce][,die]
+
         nmi_watchdog=   [KNL,BUGS=X86-32] Debugging features for SMP kernels
 
         no387           [BUGS=X86-32] Tells the kernel to use the 387 maths