Add the rt linux 4.1.3-rt3 as base

Import the rt linux 4.1.3-rt3 as OPNFV kvm base.

It's from git://git.kernel.org/pub/scm/linux/kernel/git/rt/linux-rt-devel.git linux-4.1.y-rt and
the base is:

commit 0917f823c59692d751951bf5ea699a2d1e2f26a2
Author: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Date:   Sat Jul 25 12:13:34 2015 +0200

    Prepare v4.1.3-rt3

    Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>

We lose all the git history this way and it's not good. We
should apply another opnfv project repo in future.

Change-Id: I87543d81c9df70d99c5001fbdf646b202c19f423
Signed-off-by: Yunhong Jiang <yunhong.jiang@intel.com>

1 files changed, 146 insertions, 0 deletions

diff --git a/kernel/arch/mips/oprofile/common.c b/kernel/arch/mips/oprofile/common.c
new file mode 100644
index 000000000..81f58958c
--- /dev/null
+++ b/kernel/arch/mips/oprofile/common.c
@@ -0,0 +1,146 @@
+/*
+ * This file is subject to the terms and conditions of the GNU General Public
+ * License.  See the file "COPYING" in the main directory of this archive
+ * for more details.
+ *
+ * Copyright (C) 2004, 2005 Ralf Baechle
+ * Copyright (C) 2005 MIPS Technologies, Inc.
+ */
+#include <linux/compiler.h>
+#include <linux/errno.h>
+#include <linux/init.h>
+#include <linux/oprofile.h>
+#include <linux/smp.h>
+#include <asm/cpu-info.h>
+#include <asm/cpu-type.h>
+
+#include "op_impl.h"
+
+extern struct op_mips_model op_model_mipsxx_ops __weak;
+extern struct op_mips_model op_model_loongson2_ops __weak;
+extern struct op_mips_model op_model_loongson3_ops __weak;
+
+static struct op_mips_model *model;
+
+static struct op_counter_config ctr[20];
+
+static int op_mips_setup(void)
+{
+	/* Pre-compute the values to stuff in the hardware registers.  */
+	model->reg_setup(ctr);
+
+	/* Configure the registers on all cpus.	 */
+	on_each_cpu(model->cpu_setup, NULL, 1);
+
+	return 0;
+}
+
+static int op_mips_create_files(struct dentry *root)
+{
+	int i;
+
+	for (i = 0; i < model->num_counters; ++i) {
+		struct dentry *dir;
+		char buf[4];
+
+		snprintf(buf, sizeof buf, "%d", i);
+		dir = oprofilefs_mkdir(root, buf);
+
+		oprofilefs_create_ulong(dir, "enabled", &ctr[i].enabled);
+		oprofilefs_create_ulong(dir, "event", &ctr[i].event);
+		oprofilefs_create_ulong(dir, "count", &ctr[i].count);
+		oprofilefs_create_ulong(dir, "kernel", &ctr[i].kernel);
+		oprofilefs_create_ulong(dir, "user", &ctr[i].user);
+		oprofilefs_create_ulong(dir, "exl", &ctr[i].exl);
+		/* Dummy.  */
+		oprofilefs_create_ulong(dir, "unit_mask", &ctr[i].unit_mask);
+	}
+
+	return 0;
+}
+
+static int op_mips_start(void)
+{
+	on_each_cpu(model->cpu_start, NULL, 1);
+
+	return 0;
+}
+
+static void op_mips_stop(void)
+{
+	/* Disable performance monitoring for all counters.  */
+	on_each_cpu(model->cpu_stop, NULL, 1);
+}
+
+int __init oprofile_arch_init(struct oprofile_operations *ops)
+{
+	struct op_mips_model *lmodel = NULL;
+	int res;
+
+	switch (current_cpu_type()) {
+	case CPU_5KC:
+	case CPU_M14KC:
+	case CPU_M14KEC:
+	case CPU_20KC:
+	case CPU_24K:
+	case CPU_25KF:
+	case CPU_34K:
+	case CPU_1004K:
+	case CPU_74K:
+	case CPU_1074K:
+	case CPU_INTERAPTIV:
+	case CPU_PROAPTIV:
+	case CPU_P5600:
+	case CPU_M5150:
+	case CPU_LOONGSON1:
+	case CPU_SB1:
+	case CPU_SB1A:
+	case CPU_R10000:
+	case CPU_R12000:
+	case CPU_R14000:
+	case CPU_R16000:
+	case CPU_XLR:
+		lmodel = &op_model_mipsxx_ops;
+		break;
+
+	case CPU_LOONGSON2:
+		lmodel = &op_model_loongson2_ops;
+		break;
+	case CPU_LOONGSON3:
+		lmodel = &op_model_loongson3_ops;
+		break;
+	};
+
+	/*
+	 * Always set the backtrace. This allows unsupported CPU types to still
+	 * use timer-based oprofile.
+	 */
+	ops->backtrace = op_mips_backtrace;
+
+	if (!lmodel)
+		return -ENODEV;
+
+	res = lmodel->init();
+	if (res)
+		return res;
+
+	model = lmodel;
+
+	ops->create_files	= op_mips_create_files;
+	ops->setup		= op_mips_setup;
+	//ops->shutdown		= op_mips_shutdown;
+	ops->start		= op_mips_start;
+	ops->stop		= op_mips_stop;
+	ops->cpu_type		= lmodel->cpu_type;
+
+	printk(KERN_INFO "oprofile: using %s performance monitoring.\n",
+	       lmodel->cpu_type);
+
+	return 0;
+}
+
+void oprofile_arch_exit(void)
+{
+	if (model)
+		model->exit();
+}