2 * Common interrupt code for 32 and 64 bit
5 #include <linux/interrupt.h>
6 #include <linux/kernel_stat.h>
7 #include <linux/seq_file.h>
11 #include <asm/io_apic.h>
14 atomic_t irq_err_count
;
17 * 'what should we do if we get a hw irq event on an illegal vector'.
18 * each architecture has to answer this themselves.
20 void ack_bad_irq(unsigned int irq
)
22 printk(KERN_ERR
"unexpected IRQ trap at vector %02x\n", irq
);
24 #ifdef CONFIG_X86_LOCAL_APIC
26 * Currently unexpected vectors happen only on SMP and APIC.
27 * We _must_ ack these because every local APIC has only N
28 * irq slots per priority level, and a 'hanging, unacked' IRQ
29 * holds up an irq slot - in excessive cases (when multiple
30 * unexpected vectors occur) that might lock up the APIC
32 * But only ack when the APIC is enabled -AK
40 # define irq_stats(x) (&per_cpu(irq_stat, x))
42 # define irq_stats(x) cpu_pda(x)
45 * /proc/interrupts printing:
47 static int show_other_interrupts(struct seq_file
*p
)
51 seq_printf(p
, "NMI: ");
52 for_each_online_cpu(j
)
53 seq_printf(p
, "%10u ", irq_stats(j
)->__nmi_count
);
54 seq_printf(p
, " Non-maskable interrupts\n");
55 #ifdef CONFIG_X86_LOCAL_APIC
56 seq_printf(p
, "LOC: ");
57 for_each_online_cpu(j
)
58 seq_printf(p
, "%10u ", irq_stats(j
)->apic_timer_irqs
);
59 seq_printf(p
, " Local timer interrupts\n");
62 seq_printf(p
, "RES: ");
63 for_each_online_cpu(j
)
64 seq_printf(p
, "%10u ", irq_stats(j
)->irq_resched_count
);
65 seq_printf(p
, " Rescheduling interrupts\n");
66 seq_printf(p
, "CAL: ");
67 for_each_online_cpu(j
)
68 seq_printf(p
, "%10u ", irq_stats(j
)->irq_call_count
);
69 seq_printf(p
, " Function call interrupts\n");
70 seq_printf(p
, "TLB: ");
71 for_each_online_cpu(j
)
72 seq_printf(p
, "%10u ", irq_stats(j
)->irq_tlb_count
);
73 seq_printf(p
, " TLB shootdowns\n");
76 seq_printf(p
, "TRM: ");
77 for_each_online_cpu(j
)
78 seq_printf(p
, "%10u ", irq_stats(j
)->irq_thermal_count
);
79 seq_printf(p
, " Thermal event interrupts\n");
81 seq_printf(p
, "THR: ");
82 for_each_online_cpu(j
)
83 seq_printf(p
, "%10u ", irq_stats(j
)->irq_threshold_count
);
84 seq_printf(p
, " Threshold APIC interrupts\n");
87 #ifdef CONFIG_X86_LOCAL_APIC
88 seq_printf(p
, "SPU: ");
89 for_each_online_cpu(j
)
90 seq_printf(p
, "%10u ", irq_stats(j
)->irq_spurious_count
);
91 seq_printf(p
, " Spurious interrupts\n");
93 seq_printf(p
, "ERR: %10u\n", atomic_read(&irq_err_count
));
94 #if defined(CONFIG_X86_IO_APIC)
95 seq_printf(p
, "MIS: %10u\n", atomic_read(&irq_mis_count
));
100 int show_interrupts(struct seq_file
*p
, void *v
)
102 unsigned long flags
, any_count
= 0;
103 int i
= *(loff_t
*) v
, j
;
104 struct irqaction
*action
;
105 struct irq_desc
*desc
;
111 return show_other_interrupts(p
);
116 for_each_online_cpu(j
)
117 seq_printf(p
, "CPU%-8d", j
);
121 desc
= irq_to_desc(i
);
125 spin_lock_irqsave(&desc
->lock
, flags
);
127 any_count
= kstat_irqs(i
);
129 for_each_online_cpu(j
)
130 any_count
|= kstat_irqs_cpu(i
, j
);
132 action
= desc
->action
;
133 if (!action
&& !any_count
)
136 seq_printf(p
, "%3d: ", i
);
138 seq_printf(p
, "%10u ", kstat_irqs(i
));
140 for_each_online_cpu(j
)
141 seq_printf(p
, "%10u ", kstat_irqs_cpu(i
, j
));
143 seq_printf(p
, " %8s", desc
->chip
->name
);
144 seq_printf(p
, "-%-8s", desc
->name
);
147 seq_printf(p
, " %s", action
->name
);
148 while ((action
= action
->next
) != NULL
)
149 seq_printf(p
, ", %s", action
->name
);
154 spin_unlock_irqrestore(&desc
->lock
, flags
);
161 u64
arch_irq_stat_cpu(unsigned int cpu
)
163 u64 sum
= irq_stats(cpu
)->__nmi_count
;
165 #ifdef CONFIG_X86_LOCAL_APIC
166 sum
+= irq_stats(cpu
)->apic_timer_irqs
;
169 sum
+= irq_stats(cpu
)->irq_resched_count
;
170 sum
+= irq_stats(cpu
)->irq_call_count
;
171 sum
+= irq_stats(cpu
)->irq_tlb_count
;
173 #ifdef CONFIG_X86_MCE
174 sum
+= irq_stats(cpu
)->irq_thermal_count
;
175 # ifdef CONFIG_X86_64
176 sum
+= irq_stats(cpu
)->irq_threshold_count
;
179 #ifdef CONFIG_X86_LOCAL_APIC
180 sum
+= irq_stats(cpu
)->irq_spurious_count
;
185 u64
arch_irq_stat(void)
187 u64 sum
= atomic_read(&irq_err_count
);
189 #ifdef CONFIG_X86_IO_APIC
190 sum
+= atomic_read(&irq_mis_count
);
195 EXPORT_SYMBOL_GPL(vector_used_by_percpu_irq
);