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authorKevin Cernekee <cernekee@gmail.com>2011-11-16 01:25:44 +0000
committerRalf Baechle <ralf@linux-mips.org>2011-12-07 22:03:18 +0000
commit34bd92e27becdc2c8b50d200a329da5e9b8174d9 (patch)
tree80379235839035261bbdc239dc517beeeadba2f1 /arch/mips/kernel
parent18a1eef92dcd6b8ec30fcbe6e074e5d33ef31c02 (diff)
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>
Diffstat (limited to 'arch/mips/kernel')
-rw-r--r--arch/mips/kernel/traps.c9
1 files changed, 9 insertions, 0 deletions
diff --git a/arch/mips/kernel/traps.c b/arch/mips/kernel/traps.c
index 5c8a49d5505..33945aaa9b1 100644
--- a/arch/mips/kernel/traps.c
+++ b/arch/mips/kernel/traps.c
@@ -1339,9 +1339,18 @@ void ejtag_exception_handler(struct pt_regs *regs)
/*
* NMI exception handler.
+ * No lock; only written during early bootup by CPU 0.
*/
+static RAW_NOTIFIER_HEAD(nmi_chain);
+
+int register_nmi_notifier(struct notifier_block *nb)
+{
+ return raw_notifier_chain_register(&nmi_chain, nb);
+}
+
NORET_TYPE void ATTRIB_NORET nmi_exception_handler(struct pt_regs *regs)
{
+ raw_notifier_call_chain(&nmi_chain, 0, regs);
bust_spinlocks(1);
printk("NMI taken!!!!\n");
die("NMI", regs);