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| author | Cyrill Gorcunov <gorcunov@gmail.com> | 2008-05-24 19:36:40 +0400 |
|---|---|---|
| committer | Thomas Gleixner <tglx@linutronix.de> | 2008-05-25 22:32:51 +0200 |
| commit | fd5cea02de100197a4c26d9e103508cf09b50a82 (patch) | |
| tree | 92f56b9deab1524fb09d1ab4eef7a4d0520031ba /arch/x86/kernel/nmi_64.c | |
| parent | 7c2ba83f9a479eee6f302147767a30f3187fbd4b (diff) | |
| download | linux-fd5cea02de100197a4c26d9e103508cf09b50a82.tar.gz linux-fd5cea02de100197a4c26d9e103508cf09b50a82.tar.bz2 linux-fd5cea02de100197a4c26d9e103508cf09b50a82.zip | |
x86: nmi_32/64.c - add helper functions to hide arch specific data
Signed-off-by: Cyrill Gorcunov <gorcunov@gmail.com>
Cc: hpa@zytor.com
Cc: mingo@redhat.com
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Diffstat (limited to 'arch/x86/kernel/nmi_64.c')
| -rw-r--r-- | arch/x86/kernel/nmi_64.c | 42 |
1 files changed, 31 insertions, 11 deletions
diff --git a/arch/x86/kernel/nmi_64.c b/arch/x86/kernel/nmi_64.c index d98b21cd4928..c6802447262c 100644 --- a/arch/x86/kernel/nmi_64.c +++ b/arch/x86/kernel/nmi_64.c @@ -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) { /* |