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MIPS: KGDB: fix kgdb support for SMP platforms. 

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>
hifive-unleashed-5.1
Chong Qiao 2019-03-28 07:08:01 +08:00 committed by Paul Burton
parent 8c2ffd9174
commit ab8a6d8211
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GPG Key ID: 3EA79FACB57500DD
1 changed files with 2 additions and 1 deletions
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3
arch/mips/kernel/kgdb.c
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@ -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(KERNEL_DS);
kgdb_nmicallback(raw_smp_processor_id(), NULL);
kgdb_nmicallback(raw_smp_processor_id(), get_irq_regs());
set_fs(old_fs);
}