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 FPU_STAT_CREATE(ds_emul); 65 66 return 0; 67 } 68 arch_initcall(debugfs_fpuemu); 69