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, 132 insertions, 0 deletions

diff --git a/kernel/arch/powerpc/platforms/ps3/smp.c b/kernel/arch/powerpc/platforms/ps3/smp.c
new file mode 100644
index 000000000..3c7707af3
--- /dev/null
+++ b/kernel/arch/powerpc/platforms/ps3/smp.c
@@ -0,0 +1,132 @@
+/*
+ *  PS3 SMP routines.
+ *
+ *  Copyright (C) 2006 Sony Computer Entertainment Inc.
+ *  Copyright 2006 Sony Corp.
+ *
+ *  This program is free software; you can redistribute it and/or modify
+ *  it under the terms of the GNU General Public License as published by
+ *  the Free Software Foundation; version 2 of the License.
+ *
+ *  This program is distributed in the hope that it will be useful,
+ *  but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ *  GNU General Public License for more details.
+ *
+ *  You should have received a copy of the GNU General Public License
+ *  along with this program; if not, write to the Free Software
+ *  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
+ */
+
+#include <linux/kernel.h>
+#include <linux/smp.h>
+
+#include <asm/machdep.h>
+#include <asm/udbg.h>
+
+#include "platform.h"
+
+#if defined(DEBUG)
+#define DBG udbg_printf
+#else
+#define DBG pr_debug
+#endif
+
+/**
+  * ps3_ipi_virqs - a per cpu array of virqs for ipi use
+  */
+
+#define MSG_COUNT 4
+static DEFINE_PER_CPU(unsigned int [MSG_COUNT], ps3_ipi_virqs);
+
+static void ps3_smp_message_pass(int cpu, int msg)
+{
+	int result;
+	unsigned int virq;
+
+	if (msg >= MSG_COUNT) {
+		DBG("%s:%d: bad msg: %d\n", __func__, __LINE__, msg);
+		return;
+	}
+
+	virq = per_cpu(ps3_ipi_virqs, cpu)[msg];
+	result = ps3_send_event_locally(virq);
+
+	if (result)
+		DBG("%s:%d: ps3_send_event_locally(%d, %d) failed"
+			" (%d)\n", __func__, __LINE__, cpu, msg, result);
+}
+
+static void __init ps3_smp_probe(void)
+{
+	int cpu;
+
+	for (cpu = 0; cpu < 2; cpu++) {
+		int result;
+		unsigned int *virqs = per_cpu(ps3_ipi_virqs, cpu);
+		int i;
+
+		DBG(" -> %s:%d: (%d)\n", __func__, __LINE__, cpu);
+
+		/*
+		* Check assumptions on ps3_ipi_virqs[] indexing. If this
+		* check fails, then a different mapping of PPC_MSG_
+		* to index needs to be setup.
+		*/
+
+		BUILD_BUG_ON(PPC_MSG_CALL_FUNCTION    != 0);
+		BUILD_BUG_ON(PPC_MSG_RESCHEDULE       != 1);
+		BUILD_BUG_ON(PPC_MSG_TICK_BROADCAST   != 2);
+		BUILD_BUG_ON(PPC_MSG_DEBUGGER_BREAK   != 3);
+
+		for (i = 0; i < MSG_COUNT; i++) {
+			result = ps3_event_receive_port_setup(cpu, &virqs[i]);
+
+			if (result)
+				continue;
+
+			DBG("%s:%d: (%d, %d) => virq %u\n",
+				__func__, __LINE__, cpu, i, virqs[i]);
+
+			result = smp_request_message_ipi(virqs[i], i);
+
+			if (result)
+				virqs[i] = NO_IRQ;
+			else
+				ps3_register_ipi_irq(cpu, virqs[i]);
+		}
+
+		ps3_register_ipi_debug_brk(cpu, virqs[PPC_MSG_DEBUGGER_BREAK]);
+
+		DBG(" <- %s:%d: (%d)\n", __func__, __LINE__, cpu);
+	}
+}
+
+void ps3_smp_cleanup_cpu(int cpu)
+{
+	unsigned int *virqs = per_cpu(ps3_ipi_virqs, cpu);
+	int i;
+
+	DBG(" -> %s:%d: (%d)\n", __func__, __LINE__, cpu);
+
+	for (i = 0; i < MSG_COUNT; i++) {
+		/* Can't call free_irq from interrupt context. */
+		ps3_event_receive_port_destroy(virqs[i]);
+		virqs[i] = NO_IRQ;
+	}
+
+	DBG(" <- %s:%d: (%d)\n", __func__, __LINE__, cpu);
+}
+
+static struct smp_ops_t ps3_smp_ops = {
+	.probe		= ps3_smp_probe,
+	.message_pass	= ps3_smp_message_pass,
+	.kick_cpu	= smp_generic_kick_cpu,
+};
+
+void smp_init_ps3(void)
+{
+	DBG(" -> %s\n", __func__);
+	smp_ops = &ps3_smp_ops;
+	DBG(" <- %s\n", __func__);
+}