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, 120 insertions, 0 deletions

diff --git a/kernel/arch/um/Kconfig.um b/kernel/arch/um/Kconfig.um
new file mode 100644
index 000000000..6e67847f5
--- /dev/null
+++ b/kernel/arch/um/Kconfig.um
@@ -0,0 +1,120 @@
+config STATIC_LINK
+	bool "Force a static link"
+	default n
+	help
+	  This option gives you the ability to force a static link of UML.
+	  Normally, UML is linked as a shared binary.  This is inconvenient for
+	  use in a chroot jail.  So, if you intend to run UML inside a chroot,
+	  you probably want to say Y here.
+	  Additionally, this option enables using higher memory spaces (up to
+	  2.75G) for UML.
+
+source "mm/Kconfig"
+
+config LD_SCRIPT_STATIC
+	bool
+	default y
+	depends on STATIC_LINK
+
+config LD_SCRIPT_DYN
+	bool
+	default y
+	depends on !LD_SCRIPT_STATIC
+
+source "fs/Kconfig.binfmt"
+
+config HOSTFS
+	tristate "Host filesystem"
+	help
+          While the User-Mode Linux port uses its own root file system for
+          booting and normal file access, this module lets the UML user
+          access files stored on the host.  It does not require any
+          network connection between the Host and UML.  An example use of
+          this might be:
+
+          mount none /tmp/fromhost -t hostfs -o /tmp/umlshare
+
+          where /tmp/fromhost is an empty directory inside UML and
+          /tmp/umlshare is a directory on the host with files the UML user
+          wishes to access.
+
+          For more information, see
+          <http://user-mode-linux.sourceforge.net/hostfs.html>.
+
+          If you'd like to be able to work with files stored on the host,
+          say Y or M here; otherwise say N.
+
+config HPPFS
+	tristate "HoneyPot ProcFS"
+	depends on PROC_FS
+	help
+	  hppfs (HoneyPot ProcFS) is a filesystem which allows UML /proc
+	  entries to be overridden, removed, or fabricated from the host.
+	  Its purpose is to allow a UML to appear to be a physical machine
+	  by removing or changing anything in /proc which gives away the
+	  identity of a UML.
+
+	  See <http://user-mode-linux.sf.net/old/hppfs.html> for more information.
+
+	  You only need this if you are setting up a UML honeypot.  Otherwise,
+	  it is safe to say 'N' here.
+
+config MCONSOLE
+	bool "Management console"
+	default y
+	help
+          The user mode linux management console is a low-level interface to
+          the kernel, somewhat like the i386 SysRq interface.  Since there is
+          a full-blown operating system running under every user mode linux
+          instance, there is much greater flexibility possible than with the
+          SysRq mechanism.
+
+          If you answer 'Y' to this option, to use this feature, you need the
+          mconsole client (called uml_mconsole) which is present in CVS in
+          2.4.5-9um and later (path /tools/mconsole), and is also in the
+          distribution RPM package in 2.4.6 and later.
+
+          It is safe to say 'Y' here.
+
+config MAGIC_SYSRQ
+	bool "Magic SysRq key"
+	depends on MCONSOLE
+	help
+	  If you say Y here, you will have some control over the system even
+	  if the system crashes for example during kernel debugging (e.g., you
+	  will be able to flush the buffer cache to disk, reboot the system
+	  immediately or dump some status information). A key for each of the
+	  possible requests is provided.
+
+	  This is the feature normally accomplished by pressing a key
+	  while holding SysRq (Alt+PrintScreen).
+
+	  On UML, this is accomplished by sending a "sysrq" command with
+	  mconsole, followed by the letter for the requested command.
+
+	  The keys are documented in <file:Documentation/sysrq.txt>. Don't say Y
+	  unless you really know what this hack does.
+
+config KERNEL_STACK_ORDER
+	int "Kernel stack size order"
+	default 1 if 64BIT
+	range 1 10 if 64BIT
+	default 0 if !64BIT
+	help
+	  This option determines the size of UML kernel stacks.  They will
+	  be 1 << order pages.  The default is OK unless you're running Valgrind
+	  on UML, in which case, set this to 3.
+
+config MMAPPER
+	tristate "iomem emulation driver"
+	help
+	  This driver allows a host file to be used as emulated IO memory inside
+	  UML.
+
+config NO_DMA
+	def_bool y
+
+config PGTABLE_LEVELS
+	int
+	default 3 if 3_LEVEL_PGTABLES
+	default 2