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Date: Fri, 26 Apr 2019 21:37:46 -0400 From: Sasha Levin <sashal@...nel.org> To: linux-kernel@...r.kernel.org, stable@...r.kernel.org Cc: Chong Qiao <qiaochong@...ngson.cn>, Paul Burton <paul.burton@...s.com>, Ralf Baechle <ralf@...ux-mips.org>, James Hogan <jhogan@...nel.org>, Will Deacon <will.deacon@....com>, Christophe Leroy <christophe.leroy@....fr>, linux-mips@...r.kernel.org, Sasha Levin <sashal@...nel.org> Subject: [PATCH AUTOSEL 5.0 27/79] MIPS: KGDB: fix kgdb support for SMP platforms. From: Chong Qiao <qiaochong@...ngson.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@...ngson.cn> Reviewed-by: Douglas Anderson <dianders@...omium.org> Acked-by: Daniel Thompson <daniel.thompson@...aro.org> Signed-off-by: Paul Burton <paul.burton@...s.com> Cc: Ralf Baechle <ralf@...ux-mips.org> Cc: James Hogan <jhogan@...nel.org> Cc: Will Deacon <will.deacon@....com> Cc: Christophe Leroy <christophe.leroy@....fr> Cc: linux-mips@...r.kernel.org Cc: linux-kernel@...r.kernel.org Cc: QiaoChong <qiaochong@...ngson.cn> Signed-off-by: Sasha Levin <sashal@...nel.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); } -- 2.19.1
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