1 files changed, 68 insertions, 0 deletions
diff --git a/kernel/arch/mips/math-emu/me-debugfs.c b/kernel/arch/mips/math-emu/me-debugfs.c
new file mode 100644
index 000000000..f308e0f05
--- /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);