From: Chong Qiao qiaochong@loongson.cn
[ Upstream commit ab8a6d821179ab9bea1a9179f535ccba6330c1ed ]
KGDB_call_nmi_hook is called by other cpu through smp call. MIPS smp call is processed in ipi irq handler and regs is saved in handle_int. So kgdb_call_nmi_hook get regs by get_irq_regs and regs will be passed to kgdb_cpu_enter.
Signed-off-by: Chong Qiao qiaochong@loongson.cn Reviewed-by: Douglas Anderson dianders@chromium.org Acked-by: Daniel Thompson daniel.thompson@linaro.org Signed-off-by: Paul Burton paul.burton@mips.com Cc: Ralf Baechle ralf@linux-mips.org Cc: James Hogan jhogan@kernel.org Cc: Will Deacon will.deacon@arm.com Cc: Christophe Leroy christophe.leroy@c-s.fr Cc: linux-mips@vger.kernel.org Cc: linux-kernel@vger.kernel.org Cc: QiaoChong qiaochong@loongson.cn Signed-off-by: Sasha Levin sashal@kernel.org --- arch/mips/kernel/kgdb.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-)
diff --git a/arch/mips/kernel/kgdb.c b/arch/mips/kernel/kgdb.c index 149100e1bc7c..90f37626100f 100644 --- a/arch/mips/kernel/kgdb.c +++ b/arch/mips/kernel/kgdb.c @@ -33,6 +33,7 @@ #include <asm/processor.h> #include <asm/sigcontext.h> #include <linux/uaccess.h> +#include <asm/irq_regs.h>
static struct hard_trap_info { unsigned char tt; /* Trap type code for MIPS R3xxx and R4xxx */ @@ -214,7 +215,7 @@ void kgdb_call_nmi_hook(void *ignored) old_fs = get_fs(); set_fs(get_ds());
- kgdb_nmicallback(raw_smp_processor_id(), NULL); + kgdb_nmicallback(raw_smp_processor_id(), get_irq_regs());
set_fs(old_fs); }