forge/linux-pinenote
1
0
Fork 0
Code Issues Pull requests Projects Releases Packages Wiki Activity Actions

sparc64: Implement NMI watchdog on capable cpus.

Browse source 
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
David S. Miller 2009-01-29 21:22:47 -08:00
parent c3cf5e8cc5
commit e5553a6d04
10 changed files with 319 additions and 173 deletions
Download patch file Download diff file Expand all files Collapse all files

68
arch/sparc/kernel/irq_64.c
View file

@ -196,6 +196,11 @@ int show_interrupts(struct seq_file *p, void *v)
seq_putc(p, '\n');
skip:
spin_unlock_irqrestore(&irq_desc[i].lock, flags);
} else if (i == NR_IRQS) {
seq_printf(p, "NMI: ");
for_each_online_cpu(j)
seq_printf(p, "%10u ", cpu_data(j).__nmi_count);
seq_printf(p, " Non-maskable interrupts\n");
}
return 0;
}
@ -778,69 +783,6 @@ void do_softirq(void)
local_irq_restore(flags);
}
static void unhandled_perf_irq(struct pt_regs *regs)
{
unsigned long pcr, pic;
read_pcr(pcr);
read_pic(pic);
write_pcr(0);
printk(KERN_EMERG "CPU %d: Got unexpected perf counter IRQ.\n",
smp_processor_id());
printk(KERN_EMERG "CPU %d: PCR[%016lx] PIC[%016lx]\n",
smp_processor_id(), pcr, pic);
}
/* Almost a direct copy of the powerpc PMC code. */
static DEFINE_SPINLOCK(perf_irq_lock);
static void *perf_irq_owner_caller; /* mostly for debugging */
static void (*perf_irq)(struct pt_regs *regs) = unhandled_perf_irq;
/* Invoked from level 15 PIL handler in trap table. */
void perfctr_irq(int irq, struct pt_regs *regs)
{
clear_softint(1 << irq);
perf_irq(regs);
}
int register_perfctr_intr(void (*handler)(struct pt_regs *))
{
int ret;
if (!handler)
return -EINVAL;
spin_lock(&perf_irq_lock);
if (perf_irq != unhandled_perf_irq) {
printk(KERN_WARNING "register_perfctr_intr: "
"perf IRQ busy (reserved by caller %p)\n",
perf_irq_owner_caller);
ret = -EBUSY;
goto out;
}
perf_irq_owner_caller = __builtin_return_address(0);
perf_irq = handler;
ret = 0;
out:
spin_unlock(&perf_irq_lock);
return ret;
}
EXPORT_SYMBOL_GPL(register_perfctr_intr);
void release_perfctr_intr(void (*handler)(struct pt_regs *))
{
spin_lock(&perf_irq_lock);
perf_irq_owner_caller = NULL;
perf_irq = unhandled_perf_irq;
spin_unlock(&perf_irq_lock);
}
EXPORT_SYMBOL_GPL(release_perfctr_intr);
#ifdef CONFIG_HOTPLUG_CPU
void fixup_irqs(void)
{