Add the rt linux 4.1.3-rt3 as base

[kvmfornfv.git] / kernel / arch / mips / math-emu / me-debugfs.c

diff --git a/kernel/arch/mips/math-emu/me-debugfs.c b/kernel/arch/mips/math-emu/me-debugfs.c
new file mode 100644 (file)
index 0000000..f308e0f
--- /dev/null
+++ b/kernel/arch/mips/math-emu/me-debugfs.c
@@ -0,0 +1,68 @@
+#include <linux/cpumask.h>
+#include <linux/debugfs.h>
+#include <linux/fs.h>
+#include <linux/init.h>
+#include <linux/percpu.h>
+#include <linux/types.h>
+#include <asm/fpu_emulator.h>
+#include <asm/local.h>
+
+DEFINE_PER_CPU(struct mips_fpu_emulator_stats, fpuemustats);
+
+static int fpuemu_stat_get(void *data, u64 *val)
+{
+       int cpu;
+       unsigned long sum = 0;
+
+       for_each_online_cpu(cpu) {
+               struct mips_fpu_emulator_stats *ps;
+               local_t *pv;
+
+               ps = &per_cpu(fpuemustats, cpu);
+               pv = (void *)ps + (unsigned long)data;
+               sum += local_read(pv);
+       }
+       *val = sum;
+       return 0;
+}
+DEFINE_SIMPLE_ATTRIBUTE(fops_fpuemu_stat, fpuemu_stat_get, NULL, "%llu\n");
+
+extern struct dentry *mips_debugfs_dir;
+static int __init debugfs_fpuemu(void)
+{
+       struct dentry *d, *dir;
+
+       if (!mips_debugfs_dir)
+               return -ENODEV;
+       dir = debugfs_create_dir("fpuemustats", mips_debugfs_dir);
+       if (!dir)
+               return -ENOMEM;
+
+#define FPU_EMU_STAT_OFFSET(m)                                         \
+       offsetof(struct mips_fpu_emulator_stats, m)
+
+#define FPU_STAT_CREATE(m)                                             \
+do {                                                                   \
+       d = debugfs_create_file(#m , S_IRUGO, dir,                      \
+                               (void *)FPU_EMU_STAT_OFFSET(m),         \
+                               &fops_fpuemu_stat);                     \
+       if (!d)                                                         \
+               return -ENOMEM;                                         \
+} while (0)
+
+       FPU_STAT_CREATE(emulated);
+       FPU_STAT_CREATE(loads);
+       FPU_STAT_CREATE(stores);
+       FPU_STAT_CREATE(cp1ops);
+       FPU_STAT_CREATE(cp1xops);
+       FPU_STAT_CREATE(errors);
+       FPU_STAT_CREATE(ieee754_inexact);
+       FPU_STAT_CREATE(ieee754_underflow);
+       FPU_STAT_CREATE(ieee754_overflow);
+       FPU_STAT_CREATE(ieee754_zerodiv);
+       FPU_STAT_CREATE(ieee754_invalidop);
+       FPU_STAT_CREATE(ds_emul);
+
+       return 0;
+}
+__initcall(debugfs_fpuemu);