void setup_apic_nmi_watchdog(void *unused)
{
struct hrtimer *hrtimer = &__get_cpu_var(nmi_watchdog_hrtimer);
if (__get_cpu_var(wd_enabled))
return;
/* cheap hack to support suspend/resume */
/* if cpu0 is not active neither should the other cpus */
if (smp_processor_id() != 0 && atomic_read(&nmi_active) <= 0)
return;
switch (nmi_watchdog) {
case NMI_LOCAL_APIC:
if (lapic_watchdog_init(nmi_hz) < 0) {
__get_cpu_var(wd_enabled) = 0;
return;
}
/* FALL THROUGH */
case NMI_IO_APIC:
__get_cpu_var(wd_enabled) = 1;
atomic_inc(&nmi_active);
/* kick off hrtimers to use to determine if interrupts are working */
hrtimer_init(hrtimer, CLOCK_MONOTONIC, HRTIMER_MODE_REL);
hrtimer->function = nmi_watchdog_timer_fn;
hrtimer_start(hrtimer, ns_to_ktime(get_sample_period()),
HRTIMER_MODE_REL_PINNED);
}
}
void setup_apic_nmi_watchdog(void)
{
if (__get_cpu_var(wd_enabled) == 1)
return;
switch (nmi_watchdog) {
case NMI_LOCAL_APIC:
__get_cpu_var(wd_enabled) = 1;
if (lapic_watchdog_init(nmi_hz) < 0) {
__get_cpu_var(wd_enabled) = 0;
return;
}
/* FALL THROUGH */
case NMI_IO_APIC:
__get_cpu_var(wd_enabled) = 1;
if (atomic_inc_return(&nmi_watchdog_active) == 1)
nmi_active = 1;
}
}
void __cpuinit nmi_watchdog_default(void)
{
struct hrtimer *hrtimer = &__get_cpu_var(nmi_watchdog_hrtimer);
if (nmi_watchdog != NMI_DEFAULT)
return;
/* if not specified, probe it */
if (!lapic_watchdog_init(nmi_hz))
nmi_watchdog = NMI_LOCAL_APIC;
else {
cpu_nmi_set_wd_enabled();
nmi_watchdog = NMI_IO_APIC;
}
atomic_inc(&nmi_active);
/* kick off hrtimers to use to determine if interrupts are working */
hrtimer_init(hrtimer, CLOCK_MONOTONIC, HRTIMER_MODE_REL);
hrtimer->function = nmi_watchdog_timer_fn;
hrtimer_start(hrtimer, ns_to_ktime(get_sample_period()),
HRTIMER_MODE_REL_PINNED);
}
void setup_apic_nmi_watchdog(void *unused)
{
if (__get_cpu_var(wd_enabled))
return;
/* cheap hack to support suspend/resume */
/* if cpu0 is not active neither should the other cpus */
if (smp_processor_id() != 0 && atomic_read(&nmi_active) <= 0)
return;
switch (nmi_watchdog) {
case NMI_LOCAL_APIC:
if (lapic_watchdog_init(nmi_hz) < 0) {
__get_cpu_var(wd_enabled) = 0;
return;
}
/* FALL THROUGH */
case NMI_IO_APIC:
__get_cpu_var(wd_enabled) = 1;
atomic_inc(&nmi_active);
}
}
