MIPS: Add NMI notifier

Allow the board support code to register a raw notifier callback for
NMI, similar to what is done for CU2 exceptions.

Signed-off-by: Kevin Cernekee <cernekee@gmail.com>
Cc: linux-mips@linux-mips.org
Patchwork: https://patchwork.linux-mips.org/patch/2958/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>

1 files changed, 12 insertions, 0 deletions

diff --git a/arch/mips/include/asm/traps.h b/arch/mips/include/asm/traps.h
index 90ff2f497c5..4edab87eebd 100644
--- a/arch/mips/include/asm/traps.h
+++ b/arch/mips/include/asm/traps.h
@@ -25,4 +25,16 @@ extern void (*board_nmi_handler_setup)(void);
 extern void (*board_ejtag_handler_setup)(void);
 extern void (*board_bind_eic_interrupt)(int irq, int regset);
 
+extern int register_nmi_notifier(struct notifier_block *nb);
+
+#define nmi_notifier(fn, pri)                                           \
+({                                                                      \
+        static struct notifier_block fn##_nb = {                        \
+                .notifier_call = fn,                                    \
+                .priority = pri                                         \
+        };                                                              \
+                                                                        \
+        register_nmi_notifier(&fn##_nb);                                \
+})
+
 #endif /* _ASM_TRAPS_H */