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Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
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1#include <linux/cpumask.h>
2#include <linux/debugfs.h>
3#include <linux/fs.h>
4#include <linux/init.h>
5#include <linux/percpu.h>
6#include <linux/types.h>
7#include <asm/fpu_emulator.h>
8#include <asm/local.h>
9
10DEFINE_PER_CPU(struct mips_fpu_emulator_stats, fpuemustats);
11
12static int fpuemu_stat_get(void *data, u64 *val)
13{
14 int cpu;
15 unsigned long sum = 0;
16
17 for_each_online_cpu(cpu) {
18 struct mips_fpu_emulator_stats *ps;
19 local_t *pv;
20
21 ps = &per_cpu(fpuemustats, cpu);
22 pv = (void *)ps + (unsigned long)data;
23 sum += local_read(pv);
24 }
25 *val = sum;
26 return 0;
27}
28DEFINE_SIMPLE_ATTRIBUTE(fops_fpuemu_stat, fpuemu_stat_get, NULL, "%llu\n");
29
30extern struct dentry *mips_debugfs_dir;
31static int __init debugfs_fpuemu(void)
32{
33 struct dentry *d, *dir;
34
35 if (!mips_debugfs_dir)
36 return -ENODEV;
37 dir = debugfs_create_dir("fpuemustats", mips_debugfs_dir);
38 if (!dir)
39 return -ENOMEM;
40
41#define FPU_EMU_STAT_OFFSET(m) \
42 offsetof(struct mips_fpu_emulator_stats, m)
43
44#define FPU_STAT_CREATE(m) \
45do { \
46 d = debugfs_create_file(#m , S_IRUGO, dir, \
47 (void *)FPU_EMU_STAT_OFFSET(m), \
48 &fops_fpuemu_stat); \
49 if (!d) \
50 return -ENOMEM; \
51} while (0)
52
53 FPU_STAT_CREATE(emulated);
54 FPU_STAT_CREATE(loads);
55 FPU_STAT_CREATE(stores);
56 FPU_STAT_CREATE(cp1ops);
57 FPU_STAT_CREATE(cp1xops);
58 FPU_STAT_CREATE(errors);
59 FPU_STAT_CREATE(ieee754_inexact);
60 FPU_STAT_CREATE(ieee754_underflow);
61 FPU_STAT_CREATE(ieee754_overflow);
62 FPU_STAT_CREATE(ieee754_zerodiv);
63 FPU_STAT_CREATE(ieee754_invalidop);
64
65 return 0;
66}
67__initcall(debugfs_fpuemu);