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authorThomas Gleixner <tglx@linutronix.de>2008-10-16 11:32:24 +0200
committerIngo Molnar <mingo@elte.hu>2008-10-16 16:53:29 +0200
commit6b39ba771e3c78d00e0abcebad270bd4212b28bc (patch)
tree98c0b1598eff3882faaef3b0f2ee72dcbe2f0ea0 /arch/x86/kernel/irq.c
parentc0c168ca26b54a4a6ad34fc813fe00f275fbc94c (diff)
x86: unify show_interrupts() and proc helpers
show_interrupts() and proc helpers are basically the same for 32 and 64 bit. Move them to a shared source file. Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Diffstat (limited to 'arch/x86/kernel/irq.c')
-rw-r--r--arch/x86/kernel/irq.c166
1 files changed, 166 insertions, 0 deletions
diff --git a/arch/x86/kernel/irq.c b/arch/x86/kernel/irq.c
new file mode 100644
index 00000000000..3b912849897
--- /dev/null
+++ b/arch/x86/kernel/irq.c
@@ -0,0 +1,166 @@
+/*
+ * Common interrupt code for 32 and 64 bit
+ */
+#include <linux/cpu.h>
+#include <linux/interrupt.h>
+#include <linux/kernel_stat.h>
+#include <linux/seq_file.h>
+
+#include <asm/apic.h>
+#include <asm/io_apic.h>
+#include <asm/smp.h>
+
+atomic_t irq_err_count;
+
+#ifdef CONFIG_X86_32
+# define irq_stats(x) (&per_cpu(irq_stat,x))
+#else
+# define irq_stats(x) cpu_pda(x)
+#endif
+/*
+ * /proc/interrupts printing:
+ */
+static int show_other_interrupts(struct seq_file *p)
+{
+ int j;
+
+ seq_printf(p, "NMI: ");
+ for_each_online_cpu(j)
+ seq_printf(p, "%10u ", irq_stats(j)->__nmi_count);
+ seq_printf(p, " Non-maskable interrupts\n");
+#ifdef CONFIG_X86_LOCAL_APIC
+ seq_printf(p, "LOC: ");
+ for_each_online_cpu(j)
+ seq_printf(p, "%10u ", irq_stats(j)->apic_timer_irqs);
+ seq_printf(p, " Local timer interrupts\n");
+#endif
+#ifdef CONFIG_SMP
+ seq_printf(p, "RES: ");
+ for_each_online_cpu(j)
+ seq_printf(p, "%10u ", irq_stats(j)->irq_resched_count);
+ seq_printf(p, " Rescheduling interrupts\n");
+ seq_printf(p, "CAL: ");
+ for_each_online_cpu(j)
+ seq_printf(p, "%10u ", irq_stats(j)->irq_call_count);
+ seq_printf(p, " Function call interrupts\n");
+ seq_printf(p, "TLB: ");
+ for_each_online_cpu(j)
+ seq_printf(p, "%10u ", irq_stats(j)->irq_tlb_count);
+ seq_printf(p, " TLB shootdowns\n");
+#endif
+#ifdef CONFIG_X86_MCE
+ seq_printf(p, "TRM: ");
+ for_each_online_cpu(j)
+ seq_printf(p, "%10u ", irq_stats(j)->irq_thermal_count);
+ seq_printf(p, " Thermal event interrupts\n");
+# ifdef CONFIG_X86_64
+ seq_printf(p, "THR: ");
+ for_each_online_cpu(j)
+ seq_printf(p, "%10u ", irq_stats(j)->irq_threshold_count);
+ seq_printf(p, " Threshold APIC interrupts\n");
+# endif
+#endif
+#ifdef CONFIG_X86_LOCAL_APIC
+ seq_printf(p, "SPU: ");
+ for_each_online_cpu(j)
+ seq_printf(p, "%10u ", irq_stats(j)->irq_spurious_count);
+ seq_printf(p, " Spurious interrupts\n");
+#endif
+ seq_printf(p, "ERR: %10u\n", atomic_read(&irq_err_count));
+#if defined(CONFIG_X86_IO_APIC)
+ seq_printf(p, "MIS: %10u\n", atomic_read(&irq_mis_count));
+#endif
+ return 0;
+}
+
+int show_interrupts(struct seq_file *p, void *v)
+{
+ unsigned long flags, any_count = 0;
+ int i = *(loff_t *) v, j;
+ struct irqaction *action;
+ struct irq_desc *desc;
+
+ if (i > nr_irqs)
+ return 0;
+
+ if (i == nr_irqs)
+ return show_other_interrupts(p);
+
+ /* print header */
+ if (i == 0) {
+ seq_printf(p, " ");
+ for_each_online_cpu(j)
+ seq_printf(p, "CPU%-8d",j);
+ seq_putc(p, '\n');
+ }
+
+ desc = irq_to_desc(i);
+ spin_lock_irqsave(&desc->lock, flags);
+#ifndef CONFIG_SMP
+ any_count = kstat_irqs(i);
+#else
+ for_each_online_cpu(j)
+ any_count |= kstat_irqs_cpu(i, j);
+#endif
+ action = desc->action;
+ if (!action && !any_count)
+ goto out;
+
+ seq_printf(p, "%3d: ", i);
+#ifndef CONFIG_SMP
+ seq_printf(p, "%10u ", kstat_irqs(i));
+#else
+ for_each_online_cpu(j)
+ seq_printf(p, "%10u ", kstat_irqs_cpu(i, j));
+#endif
+ seq_printf(p, " %8s", desc->chip->name);
+ seq_printf(p, "-%-8s", desc->name);
+
+ if (action) {
+ seq_printf(p, " %s", action->name);
+ while ((action = action->next) != NULL)
+ seq_printf(p, ", %s", action->name);
+ }
+
+ seq_putc(p, '\n');
+out:
+ spin_unlock_irqrestore(&desc->lock, flags);
+ return 0;
+}
+
+/*
+ * /proc/stat helpers
+ */
+u64 arch_irq_stat_cpu(unsigned int cpu)
+{
+ u64 sum = irq_stats(cpu)->__nmi_count;
+
+#ifdef CONFIG_X86_LOCAL_APIC
+ sum += irq_stats(cpu)->apic_timer_irqs;
+#endif
+#ifdef CONFIG_SMP
+ sum += irq_stats(cpu)->irq_resched_count;
+ sum += irq_stats(cpu)->irq_call_count;
+ sum += irq_stats(cpu)->irq_tlb_count;
+#endif
+#ifdef CONFIG_X86_MCE
+ sum += irq_stats(cpu)->irq_thermal_count;
+# ifdef CONFIG_X86_64
+ sum += irq_stats(cpu)->irq_threshold_count;
+#endif
+#endif
+#ifdef CONFIG_X86_LOCAL_APIC
+ sum += irq_stats(cpu)->irq_spurious_count;
+#endif
+ return sum;
+}
+
+u64 arch_irq_stat(void)
+{
+ u64 sum = atomic_read(&irq_err_count);
+
+#ifdef CONFIG_X86_IO_APIC
+ sum += atomic_read(&irq_mis_count);
+#endif
+ return sum;
+}