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SubjectRe: [PATCH] MIPS: KGDB: fix kgdb support for SMP platforms.
On Thu, Mar 28, 2019 at 07:08:01AM +0800, Chong Qiao wrote:
> 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>

Acked-by: Daniel Thompson <daniel.thompson@linaro.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 6e574c02e4c3b..ea781b29f7f17 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(KERNEL_DS);
>
> - kgdb_nmicallback(raw_smp_processor_id(), NULL);
> + kgdb_nmicallback(raw_smp_processor_id(), get_irq_regs());
>
> set_fs(old_fs);
> }
> --
> 2.17.0
>
>

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