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authorThomas Gleixner <tglx@linutronix.de>2008-10-16 05:32:24 -0400
committerIngo Molnar <mingo@elte.hu>2008-10-16 10:53:29 -0400
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 000000000000..3b9128498976
--- /dev/null
+++ b/arch/x86/kernel/irq.c
@@ -0,0 +1,166 @@
1/*
2 * Common interrupt code for 32 and 64 bit
3 */
4#include <linux/cpu.h>
5#include <linux/interrupt.h>
6#include <linux/kernel_stat.h>
7#include <linux/seq_file.h>
8
9#include <asm/apic.h>
10#include <asm/io_apic.h>
11#include <asm/smp.h>
12
13atomic_t irq_err_count;
14
15#ifdef CONFIG_X86_32
16# define irq_stats(x) (&per_cpu(irq_stat,x))
17#else
18# define irq_stats(x) cpu_pda(x)
19#endif
20/*
21 * /proc/interrupts printing:
22 */
23static int show_other_interrupts(struct seq_file *p)
24{
25 int j;
26
27 seq_printf(p, "NMI: ");
28 for_each_online_cpu(j)
29 seq_printf(p, "%10u ", irq_stats(j)->__nmi_count);
30 seq_printf(p, " Non-maskable interrupts\n");
31#ifdef CONFIG_X86_LOCAL_APIC
32 seq_printf(p, "LOC: ");
33 for_each_online_cpu(j)
34 seq_printf(p, "%10u ", irq_stats(j)->apic_timer_irqs);
35 seq_printf(p, " Local timer interrupts\n");
36#endif
37#ifdef CONFIG_SMP
38 seq_printf(p, "RES: ");
39 for_each_online_cpu(j)
40 seq_printf(p, "%10u ", irq_stats(j)->irq_resched_count);
41 seq_printf(p, " Rescheduling interrupts\n");
42 seq_printf(p, "CAL: ");
43 for_each_online_cpu(j)
44 seq_printf(p, "%10u ", irq_stats(j)->irq_call_count);
45 seq_printf(p, " Function call interrupts\n");
46 seq_printf(p, "TLB: ");
47 for_each_online_cpu(j)
48 seq_printf(p, "%10u ", irq_stats(j)->irq_tlb_count);
49 seq_printf(p, " TLB shootdowns\n");
50#endif
51#ifdef CONFIG_X86_MCE
52 seq_printf(p, "TRM: ");
53 for_each_online_cpu(j)
54 seq_printf(p, "%10u ", irq_stats(j)->irq_thermal_count);
55 seq_printf(p, " Thermal event interrupts\n");
56# ifdef CONFIG_X86_64
57 seq_printf(p, "THR: ");
58 for_each_online_cpu(j)
59 seq_printf(p, "%10u ", irq_stats(j)->irq_threshold_count);
60 seq_printf(p, " Threshold APIC interrupts\n");
61# endif
62#endif
63#ifdef CONFIG_X86_LOCAL_APIC
64 seq_printf(p, "SPU: ");
65 for_each_online_cpu(j)
66 seq_printf(p, "%10u ", irq_stats(j)->irq_spurious_count);
67 seq_printf(p, " Spurious interrupts\n");
68#endif
69 seq_printf(p, "ERR: %10u\n", atomic_read(&irq_err_count));
70#if defined(CONFIG_X86_IO_APIC)
71 seq_printf(p, "MIS: %10u\n", atomic_read(&irq_mis_count));
72#endif
73 return 0;
74}
75
76int show_interrupts(struct seq_file *p, void *v)
77{
78 unsigned long flags, any_count = 0;
79 int i = *(loff_t *) v, j;
80 struct irqaction *action;
81 struct irq_desc *desc;
82
83 if (i > nr_irqs)
84 return 0;
85
86 if (i == nr_irqs)
87 return show_other_interrupts(p);
88
89 /* print header */
90 if (i == 0) {
91 seq_printf(p, " ");
92 for_each_online_cpu(j)
93 seq_printf(p, "CPU%-8d",j);
94 seq_putc(p, '\n');
95 }
96
97 desc = irq_to_desc(i);
98 spin_lock_irqsave(&desc->lock, flags);
99#ifndef CONFIG_SMP
100 any_count = kstat_irqs(i);
101#else
102 for_each_online_cpu(j)
103 any_count |= kstat_irqs_cpu(i, j);
104#endif
105 action = desc->action;
106 if (!action && !any_count)
107 goto out;
108
109 seq_printf(p, "%3d: ", i);
110#ifndef CONFIG_SMP
111 seq_printf(p, "%10u ", kstat_irqs(i));
112#else
113 for_each_online_cpu(j)
114 seq_printf(p, "%10u ", kstat_irqs_cpu(i, j));
115#endif
116 seq_printf(p, " %8s", desc->chip->name);
117 seq_printf(p, "-%-8s", desc->name);
118
119 if (action) {
120 seq_printf(p, " %s", action->name);
121 while ((action = action->next) != NULL)
122 seq_printf(p, ", %s", action->name);
123 }
124
125 seq_putc(p, '\n');
126out:
127 spin_unlock_irqrestore(&desc->lock, flags);
128 return 0;
129}
130
131/*
132 * /proc/stat helpers
133 */
134u64 arch_irq_stat_cpu(unsigned int cpu)
135{
136 u64 sum = irq_stats(cpu)->__nmi_count;
137
138#ifdef CONFIG_X86_LOCAL_APIC
139 sum += irq_stats(cpu)->apic_timer_irqs;
140#endif
141#ifdef CONFIG_SMP
142 sum += irq_stats(cpu)->irq_resched_count;
143 sum += irq_stats(cpu)->irq_call_count;
144 sum += irq_stats(cpu)->irq_tlb_count;
145#endif
146#ifdef CONFIG_X86_MCE
147 sum += irq_stats(cpu)->irq_thermal_count;
148# ifdef CONFIG_X86_64
149 sum += irq_stats(cpu)->irq_threshold_count;
150#endif
151#endif
152#ifdef CONFIG_X86_LOCAL_APIC
153 sum += irq_stats(cpu)->irq_spurious_count;
154#endif
155 return sum;
156}
157
158u64 arch_irq_stat(void)
159{
160 u64 sum = atomic_read(&irq_err_count);
161
162#ifdef CONFIG_X86_IO_APIC
163 sum += atomic_read(&irq_mis_count);
164#endif
165 return sum;
166}