arch/mips/math-emu/me-debugfs.c

   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
  10 DEFINE_PER_CPU(struct mips_fpu_emulator_stats, fpuemustats);
  11
  12 static 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 }
  28 DEFINE_SIMPLE_ATTRIBUTE(fops_fpuemu_stat, fpuemu_stat_get, NULL, "%llu\n");
  29
  30 extern struct dentry *mips_debugfs_dir;
  31 static 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)                                              \
  45 do {                                                                    \
  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);