This adds an irq counter for the watchdog soft-NMI. This interrupt only fires when interrupts are soft-disabled, so it will not increment much even when the watchdog is running. However it's useful for debugging and sanity checking.
Signed-off-by: Nicholas Piggin <npig...@gmail.com> --- arch/powerpc/include/asm/hardirq.h | 3 +++ arch/powerpc/kernel/irq.c | 10 ++++++++++ 2 files changed, 13 insertions(+) diff --git a/arch/powerpc/include/asm/hardirq.h b/arch/powerpc/include/asm/hardirq.h index 64b73b03d473..c97603d617e3 100644 --- a/arch/powerpc/include/asm/hardirq.h +++ b/arch/powerpc/include/asm/hardirq.h @@ -13,6 +13,9 @@ typedef struct { unsigned int spurious_irqs; unsigned int hmi_exceptions; unsigned int sreset_irqs; +#ifdef CONFIG_PPC_WATCHDOG + unsigned int soft_nmi_irqs; +#endif #ifdef CONFIG_PPC_DOORBELL unsigned int doorbell_irqs; #endif diff --git a/arch/powerpc/kernel/irq.c b/arch/powerpc/kernel/irq.c index 5c18335580b6..77a7f7514327 100644 --- a/arch/powerpc/kernel/irq.c +++ b/arch/powerpc/kernel/irq.c @@ -475,6 +475,13 @@ int arch_show_interrupts(struct seq_file *p, int prec) seq_printf(p, "%10u ", per_cpu(irq_stat, j).sreset_irqs); seq_printf(p, " System Reset interrupts\n"); +#ifdef CONFIG_PPC_WATCHDOG + seq_printf(p, "%*s: ", prec, "WDG"); + for_each_online_cpu(j) + seq_printf(p, "%10u ", per_cpu(irq_stat, j).soft_nmi_irqs); + seq_printf(p, " Watchdog soft-NMI interrupts\n"); +#endif + #ifdef CONFIG_PPC_DOORBELL if (cpu_has_feature(CPU_FTR_DBELL)) { seq_printf(p, "%*s: ", prec, "DBL"); @@ -500,6 +507,9 @@ u64 arch_irq_stat_cpu(unsigned int cpu) sum += per_cpu(irq_stat, cpu).timer_irqs_others; sum += per_cpu(irq_stat, cpu).hmi_exceptions; sum += per_cpu(irq_stat, cpu).sreset_irqs; +#ifdef CONFIG_PPC_WATCHDOG + sum += per_cpu(irq_stat, cpu).soft_nmi_irqs; +#endif #ifdef CONFIG_PPC_DOORBELL sum += per_cpu(irq_stat, cpu).doorbell_irqs; #endif -- 2.11.0