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x86: nmi_32/64.c - add helper functions to hide arch specific data

Browse source 
Signed-off-by: Cyrill Gorcunov <gorcunov@gmail.com>
Cc: hpa@zytor.com
Cc: mingo@redhat.com
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
This commit is contained in:
Cyrill Gorcunov 2008-05-24 19:36:40 +04:00 committed by Thomas Gleixner
parent 7c2ba83f9a
commit fd5cea02de
2 changed files with 63 additions and 23 deletions
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44
arch/x86/kernel/nmi_32.c
View file

@ -51,6 +51,26 @@ static DEFINE_PER_CPU(short, wd_enabled);
static int endflag __initdata = 0;
static inline unsigned int get_nmi_count(int cpu)
{
return nmi_count(cpu);
}
static inline int mce_in_progress(void)
{
return 0;
}
/*
* Take the local apic timer and PIT/HPET into account. We don't
* know which one is active, when we have highres/dyntick on
*/
static inline unsigned int get_timer_irqs(int cpu)
{
return per_cpu(irq_stat, cpu).apic_timer_irqs +
per_cpu(irq_stat, cpu).irq0_irqs;
}
/* Run after command line and cpu_init init, but before all other checks */
void nmi_watchdog_default(void)
{
@ -104,19 +124,19 @@ int __init check_nmi_watchdog(void)
#endif
for_each_possible_cpu(cpu)
prev_nmi_count[cpu] = nmi_count(cpu);
prev_nmi_count[cpu] = get_nmi_count(cpu);
local_irq_enable();
mdelay((20*1000)/nmi_hz); // wait 20 ticks
for_each_online_cpu(cpu) {
if (!per_cpu(wd_enabled, cpu))
continue;
if (nmi_count(cpu) - prev_nmi_count[cpu] <= 5) {
if (get_nmi_count(cpu) - prev_nmi_count[cpu] <= 5) {
printk(KERN_WARNING "WARNING: CPU#%d: NMI "
"appears to be stuck (%d->%d)!\n",
cpu,
prev_nmi_count[cpu],
nmi_count(cpu));
get_nmi_count(cpu));
per_cpu(wd_enabled, cpu) = 0;
atomic_dec(&nmi_active);
}
@ -355,6 +375,13 @@ nmi_watchdog_tick(struct pt_regs *regs, unsigned reason)
touched = 1;
}
sum = get_timer_irqs(cpu);
if (__get_cpu_var(nmi_touch)) {
__get_cpu_var(nmi_touch) = 0;
touched = 1;
}
if (cpu_isset(cpu, backtrace_mask)) {
static DEFINE_SPINLOCK(lock); /* Serialise the printks */
@ -365,16 +392,9 @@ nmi_watchdog_tick(struct pt_regs *regs, unsigned reason)
cpu_clear(cpu, backtrace_mask);
}
/*
* Take the local apic timer and PIT/HPET into account. We don't
* know which one is active, when we have highres/dyntick on
*/
sum = per_cpu(irq_stat, cpu).apic_timer_irqs +
per_cpu(irq_stat, cpu).irq0_irqs;
if (__get_cpu_var(nmi_touch)) {
__get_cpu_var(nmi_touch) = 0;
/* Could check oops_in_progress here too, but it's safer not to */
if (mce_in_progress())
touched = 1;
}
/* if the none of the timers isn't firing, this cpu isn't doing much */
if (!touched && __get_cpu_var(last_irq_sum) == sum) {

42
arch/x86/kernel/nmi_64.c
View file

@ -47,6 +47,30 @@ static unsigned int nmi_hz = HZ;
static DEFINE_PER_CPU(short, wd_enabled);
static int endflag __initdata = 0;
static inline unsigned int get_nmi_count(int cpu)
{
return cpu_pda(cpu)->__nmi_count;
}
static inline int mce_in_progress(void)
{
#ifdef CONFIG_X86_MCE
return atomic_read(&mce_entry) > 0;
#endif
return 0;
}
/*
* Take the local apic timer and PIT/HPET into account. We don't
* know which one is active, when we have highres/dyntick on
*/
static inline unsigned int get_timer_irqs(int cpu)
{
return read_pda(apic_timer_irqs) + read_pda(irq0_irqs);
}
/* Run after command line and cpu_init init, but before all other checks */
void nmi_watchdog_default(void)
{
@ -55,8 +79,6 @@ void nmi_watchdog_default(void)
nmi_watchdog = NMI_NONE;
}
static int endflag __initdata = 0;
#ifdef CONFIG_SMP
/* The performance counters used by NMI_LOCAL_APIC don't trigger when
* the CPU is idle. To make sure the NMI watchdog really ticks on all
@ -99,19 +121,19 @@ int __init check_nmi_watchdog(void)
#endif
for_each_possible_cpu(cpu)
prev_nmi_count[cpu] = cpu_pda(cpu)->__nmi_count;
prev_nmi_count[cpu] = get_nmi_count(cpu);
local_irq_enable();
mdelay((20*1000)/nmi_hz); // wait 20 ticks
for_each_online_cpu(cpu) {
if (!per_cpu(wd_enabled, cpu))
continue;
if (cpu_pda(cpu)->__nmi_count - prev_nmi_count[cpu] <= 5) {
if (get_nmi_count(cpu) - prev_nmi_count[cpu] <= 5) {
printk(KERN_WARNING "WARNING: CPU#%d: NMI "
"appears to be stuck (%d->%d)!\n",
cpu,
prev_nmi_count[cpu],
cpu_pda(cpu)->__nmi_count);
get_nmi_count(cpu));
per_cpu(wd_enabled, cpu) = 0;
atomic_dec(&nmi_active);
}
@ -327,7 +349,8 @@ nmi_watchdog_tick(struct pt_regs *regs, unsigned reason)
touched = 1;
}
sum = read_pda(apic_timer_irqs) + read_pda(irq0_irqs);
sum = get_timer_irqs(cpu);
if (__get_cpu_var(nmi_touch)) {
__get_cpu_var(nmi_touch) = 0;
touched = 1;
@ -343,12 +366,9 @@ nmi_watchdog_tick(struct pt_regs *regs, unsigned reason)
cpu_clear(cpu, backtrace_mask);
}
#ifdef CONFIG_X86_MCE
/* Could check oops_in_progress here too, but it's safer
not too */
if (atomic_read(&mce_entry) > 0)
if (mce_in_progress())
touched = 1;
#endif
/* if the apic timer isn't firing, this cpu isn't doing much */
if (!touched && __get_cpu_var(last_irq_sum) == sum) {
/*