* [PATCH 5.0 33/95] MIPS: KGDB: fix kgdb support for SMP platforms.
[not found] <20190509181309.180685671@linuxfoundation.org>
@ 2019-05-09 18:41 ` Greg Kroah-Hartman
0 siblings, 0 replies; only message in thread
From: Greg Kroah-Hartman @ 2019-05-09 18:41 UTC (permalink / raw)
To: linux-kernel
Cc: Greg Kroah-Hartman, stable, Chong Qiao, Douglas Anderson,
Daniel Thompson, Paul Burton, Ralf Baechle, James Hogan,
Will Deacon, Christophe Leroy, linux-mips, Sasha Levin
[ 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 149100e1bc7c4..90f37626100fe 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);
}
--
2.20.1
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2019-05-09 18:41 ` [PATCH 5.0 33/95] MIPS: KGDB: fix kgdb support for SMP platforms Greg Kroah-Hartman
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