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>
10 #include <asm/io_apic.h>
13 atomic_t irq_err_count
;
16 * 'what should we do if we get a hw irq event on an illegal vector'.
17 * each architecture has to answer this themselves.
19 void ack_bad_irq(unsigned int irq
)
21 printk(KERN_ERR
"unexpected IRQ trap at vector %02x\n", irq
);
23 #ifdef CONFIG_X86_LOCAL_APIC
25 * Currently unexpected vectors happen only on SMP and APIC.
26 * We _must_ ack these because every local APIC has only N
27 * irq slots per priority level, and a 'hanging, unacked' IRQ
28 * holds up an irq slot - in excessive cases (when multiple
29 * unexpected vectors occur) that might lock up the APIC
31 * But only ack when the APIC is enabled -AK
39 # define irq_stats(x) (&per_cpu(irq_stat, x))
41 # define irq_stats(x) cpu_pda(x)
44 * /proc/interrupts printing:
46 static int show_other_interrupts(struct seq_file
*p
)
50 seq_printf(p
, "NMI: ");
51 for_each_online_cpu(j
)
52 seq_printf(p
, "%10u ", irq_stats(j
)->__nmi_count
);
53 seq_printf(p
, " Non-maskable interrupts\n");
54 #ifdef CONFIG_X86_LOCAL_APIC
55 seq_printf(p
, "LOC: ");
56 for_each_online_cpu(j
)
57 seq_printf(p
, "%10u ", irq_stats(j
)->apic_timer_irqs
);
58 seq_printf(p
, " Local timer interrupts\n");
59 seq_printf(p
, "CNT: ");
60 for_each_online_cpu(j
)
61 seq_printf(p
, "%10u ", irq_stats(j
)->apic_perf_irqs
);
62 seq_printf(p
, " Performance counter interrupts\n");
65 seq_printf(p
, "RES: ");
66 for_each_online_cpu(j
)
67 seq_printf(p
, "%10u ", irq_stats(j
)->irq_resched_count
);
68 seq_printf(p
, " Rescheduling interrupts\n");
69 seq_printf(p
, "CAL: ");
70 for_each_online_cpu(j
)
71 seq_printf(p
, "%10u ", irq_stats(j
)->irq_call_count
);
72 seq_printf(p
, " Function call interrupts\n");
73 seq_printf(p
, "TLB: ");
74 for_each_online_cpu(j
)
75 seq_printf(p
, "%10u ", irq_stats(j
)->irq_tlb_count
);
76 seq_printf(p
, " TLB shootdowns\n");
79 seq_printf(p
, "TRM: ");
80 for_each_online_cpu(j
)
81 seq_printf(p
, "%10u ", irq_stats(j
)->irq_thermal_count
);
82 seq_printf(p
, " Thermal event interrupts\n");
84 seq_printf(p
, "THR: ");
85 for_each_online_cpu(j
)
86 seq_printf(p
, "%10u ", irq_stats(j
)->irq_threshold_count
);
87 seq_printf(p
, " Threshold APIC interrupts\n");
90 #ifdef CONFIG_X86_LOCAL_APIC
91 seq_printf(p
, "SPU: ");
92 for_each_online_cpu(j
)
93 seq_printf(p
, "%10u ", irq_stats(j
)->irq_spurious_count
);
94 seq_printf(p
, " Spurious interrupts\n");
96 seq_printf(p
, "ERR: %10u\n", atomic_read(&irq_err_count
));
97 #if defined(CONFIG_X86_IO_APIC)
98 seq_printf(p
, "MIS: %10u\n", atomic_read(&irq_mis_count
));
103 int show_interrupts(struct seq_file
*p
, void *v
)
105 unsigned long flags
, any_count
= 0;
106 int i
= *(loff_t
*) v
, j
;
107 struct irqaction
*action
;
108 struct irq_desc
*desc
;
114 return show_other_interrupts(p
);
119 for_each_online_cpu(j
)
120 seq_printf(p
, "CPU%-8d", j
);
124 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
;
167 sum
+= irq_stats(cpu
)->apic_perf_irqs
;
170 sum
+= irq_stats(cpu
)->irq_resched_count
;
171 sum
+= irq_stats(cpu
)->irq_call_count
;
172 sum
+= irq_stats(cpu
)->irq_tlb_count
;
174 #ifdef CONFIG_X86_MCE
175 sum
+= irq_stats(cpu
)->irq_thermal_count
;
176 # ifdef CONFIG_X86_64
177 sum
+= irq_stats(cpu
)->irq_threshold_count
;
180 #ifdef CONFIG_X86_LOCAL_APIC
181 sum
+= irq_stats(cpu
)->irq_spurious_count
;
186 u64
arch_irq_stat(void)
188 u64 sum
= atomic_read(&irq_err_count
);
190 #ifdef CONFIG_X86_IO_APIC
191 sum
+= atomic_read(&irq_mis_count
);
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