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, 125 insertions, 0 deletions

diff --git a/kernel/include/linux/vtime.h b/kernel/include/linux/vtime.h
new file mode 100644
index 000000000..c5165fd25
--- /dev/null
+++ b/kernel/include/linux/vtime.h
@@ -0,0 +1,125 @@
+#ifndef _LINUX_KERNEL_VTIME_H
+#define _LINUX_KERNEL_VTIME_H
+
+#include <linux/context_tracking_state.h>
+#ifdef CONFIG_VIRT_CPU_ACCOUNTING_NATIVE
+#include <asm/vtime.h>
+#endif
+
+
+struct task_struct;
+
+/*
+ * vtime_accounting_enabled() definitions/declarations
+ */
+#ifdef CONFIG_VIRT_CPU_ACCOUNTING_NATIVE
+static inline bool vtime_accounting_enabled(void) { return true; }
+#endif /* CONFIG_VIRT_CPU_ACCOUNTING_NATIVE */
+
+#ifdef CONFIG_VIRT_CPU_ACCOUNTING_GEN
+static inline bool vtime_accounting_enabled(void)
+{
+	if (context_tracking_is_enabled()) {
+		if (context_tracking_cpu_is_enabled())
+			return true;
+	}
+
+	return false;
+}
+#endif /* CONFIG_VIRT_CPU_ACCOUNTING_GEN */
+
+#ifndef CONFIG_VIRT_CPU_ACCOUNTING
+static inline bool vtime_accounting_enabled(void) { return false; }
+#endif /* !CONFIG_VIRT_CPU_ACCOUNTING */
+
+
+/*
+ * Common vtime APIs
+ */
+#ifdef CONFIG_VIRT_CPU_ACCOUNTING
+
+#ifdef __ARCH_HAS_VTIME_TASK_SWITCH
+extern void vtime_task_switch(struct task_struct *prev);
+#else
+extern void vtime_common_task_switch(struct task_struct *prev);
+static inline void vtime_task_switch(struct task_struct *prev)
+{
+	if (vtime_accounting_enabled())
+		vtime_common_task_switch(prev);
+}
+#endif /* __ARCH_HAS_VTIME_TASK_SWITCH */
+
+extern void vtime_account_system(struct task_struct *tsk);
+extern void vtime_account_idle(struct task_struct *tsk);
+extern void vtime_account_user(struct task_struct *tsk);
+
+#ifdef __ARCH_HAS_VTIME_ACCOUNT
+extern void vtime_account_irq_enter(struct task_struct *tsk);
+#else
+extern void vtime_common_account_irq_enter(struct task_struct *tsk);
+static inline void vtime_account_irq_enter(struct task_struct *tsk)
+{
+	if (vtime_accounting_enabled())
+		vtime_common_account_irq_enter(tsk);
+}
+#endif /* __ARCH_HAS_VTIME_ACCOUNT */
+
+#else /* !CONFIG_VIRT_CPU_ACCOUNTING */
+
+static inline void vtime_task_switch(struct task_struct *prev) { }
+static inline void vtime_account_system(struct task_struct *tsk) { }
+static inline void vtime_account_user(struct task_struct *tsk) { }
+static inline void vtime_account_irq_enter(struct task_struct *tsk) { }
+#endif /* !CONFIG_VIRT_CPU_ACCOUNTING */
+
+#ifdef CONFIG_VIRT_CPU_ACCOUNTING_GEN
+extern void arch_vtime_task_switch(struct task_struct *tsk);
+extern void vtime_gen_account_irq_exit(struct task_struct *tsk);
+
+static inline void vtime_account_irq_exit(struct task_struct *tsk)
+{
+	if (vtime_accounting_enabled())
+		vtime_gen_account_irq_exit(tsk);
+}
+
+extern void vtime_user_enter(struct task_struct *tsk);
+
+static inline void vtime_user_exit(struct task_struct *tsk)
+{
+	vtime_account_user(tsk);
+}
+extern void vtime_guest_enter(struct task_struct *tsk);
+extern void vtime_guest_exit(struct task_struct *tsk);
+extern void vtime_init_idle(struct task_struct *tsk, int cpu);
+#else /* !CONFIG_VIRT_CPU_ACCOUNTING_GEN  */
+static inline void vtime_account_irq_exit(struct task_struct *tsk)
+{
+	/* On hard|softirq exit we always account to hard|softirq cputime */
+	vtime_account_system(tsk);
+}
+static inline void vtime_user_enter(struct task_struct *tsk) { }
+static inline void vtime_user_exit(struct task_struct *tsk) { }
+static inline void vtime_guest_enter(struct task_struct *tsk) { }
+static inline void vtime_guest_exit(struct task_struct *tsk) { }
+static inline void vtime_init_idle(struct task_struct *tsk, int cpu) { }
+#endif
+
+#ifdef CONFIG_IRQ_TIME_ACCOUNTING
+extern void irqtime_account_irq(struct task_struct *tsk);
+#else
+static inline void irqtime_account_irq(struct task_struct *tsk) { }
+#endif
+
+static inline void account_irq_enter_time(struct task_struct *tsk)
+{
+	vtime_account_irq_enter(tsk);
+	irqtime_account_irq(tsk);
+}
+
+static inline void account_irq_exit_time(struct task_struct *tsk)
+{
+	vtime_account_irq_exit(tsk);
+	irqtime_account_irq(tsk);
+}
+
+#endif /* _LINUX_KERNEL_VTIME_H */