Currently kernel never set KGDB_REASON_NMI. We do now, when we enter KGDB/KDB from an NMI.
This is not to be confused with kgdb_nmicallback(), NMI callback is an entry for the slave CPUs during CPUs roundup, but REASON_NMI is the entry for the master CPU.
Signed-off-by: Anton Vorontsov anton.vorontsov@linaro.org --- kernel/debug/kdb/kdb_debugger.c | 4 ++++ 1 file changed, 4 insertions(+)
diff --git a/kernel/debug/kdb/kdb_debugger.c b/kernel/debug/kdb/kdb_debugger.c index 8b68ce7..be7b33b 100644 --- a/kernel/debug/kdb/kdb_debugger.c +++ b/kernel/debug/kdb/kdb_debugger.c @@ -12,6 +12,7 @@ #include <linux/kdb.h> #include <linux/kdebug.h> #include <linux/export.h> +#include <linux/hardirq.h> #include "kdb_private.h" #include "../debug_core.h"
@@ -52,6 +53,9 @@ int kdb_stub(struct kgdb_state *ks) if (atomic_read(&kgdb_setting_breakpoint)) reason = KDB_REASON_KEYBOARD;
+ if (in_nmi()) + reason = KDB_REASON_NMI; + for (i = 0, bp = kdb_breakpoints; i < KDB_MAXBPT; i++, bp++) { if ((bp->bp_enabled) && (bp->bp_addr == addr)) { reason = KDB_REASON_BREAK;