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, 266 insertions, 0 deletions

diff --git a/kernel/arch/x86/Makefile b/kernel/arch/x86/Makefile
new file mode 100644
index 000000000..2fda005bb
--- /dev/null
+++ b/kernel/arch/x86/Makefile
@@ -0,0 +1,266 @@
+# Unified Makefile for i386 and x86_64
+
+# select defconfig based on actual architecture
+ifeq ($(ARCH),x86)
+  ifeq ($(shell uname -m),x86_64)
+        KBUILD_DEFCONFIG := x86_64_defconfig
+  else
+        KBUILD_DEFCONFIG := i386_defconfig
+  endif
+else
+        KBUILD_DEFCONFIG := $(ARCH)_defconfig
+endif
+
+# How to compile the 16-bit code.  Note we always compile for -march=i386;
+# that way we can complain to the user if the CPU is insufficient.
+#
+# The -m16 option is supported by GCC >= 4.9 and clang >= 3.5. For
+# older versions of GCC, include an *assembly* header to make sure that
+# gcc doesn't play any games behind our back.
+CODE16GCC_CFLAGS := -m32 -Wa,$(srctree)/arch/x86/boot/code16gcc.h
+M16_CFLAGS	 := $(call cc-option, -m16, $(CODE16GCC_CFLAGS))
+
+REALMODE_CFLAGS	:= $(M16_CFLAGS) -g -Os -D__KERNEL__ \
+		   -DDISABLE_BRANCH_PROFILING \
+		   -Wall -Wstrict-prototypes -march=i386 -mregparm=3 \
+		   -fno-strict-aliasing -fomit-frame-pointer -fno-pic \
+		   -mno-mmx -mno-sse \
+		   $(call cc-option, -ffreestanding) \
+		   $(call cc-option, -fno-stack-protector) \
+		   $(call cc-option, -mpreferred-stack-boundary=2)
+export REALMODE_CFLAGS
+
+# BITS is used as extension for files which are available in a 32 bit
+# and a 64 bit version to simplify shared Makefiles.
+# e.g.: obj-y += foo_$(BITS).o
+export BITS
+
+ifdef CONFIG_X86_NEED_RELOCS
+        LDFLAGS_vmlinux := --emit-relocs
+endif
+
+ifeq ($(CONFIG_X86_32),y)
+        BITS := 32
+        UTS_MACHINE := i386
+        CHECKFLAGS += -D__i386__
+
+        biarch := $(call cc-option,-m32)
+        KBUILD_AFLAGS += $(biarch)
+        KBUILD_CFLAGS += $(biarch)
+
+        KBUILD_CFLAGS += -msoft-float -mregparm=3 -freg-struct-return
+
+        # Never want PIC in a 32-bit kernel, prevent breakage with GCC built
+        # with nonstandard options
+        KBUILD_CFLAGS += -fno-pic
+
+        # prevent gcc from keeping the stack 16 byte aligned
+        KBUILD_CFLAGS += $(call cc-option,-mpreferred-stack-boundary=2)
+
+        # Disable unit-at-a-time mode on pre-gcc-4.0 compilers, it makes gcc use
+        # a lot more stack due to the lack of sharing of stacklots:
+        KBUILD_CFLAGS += $(call cc-ifversion, -lt, 0400, \
+				$(call cc-option,-fno-unit-at-a-time))
+
+        # CPU-specific tuning. Anything which can be shared with UML should go here.
+        include arch/x86/Makefile_32.cpu
+        KBUILD_CFLAGS += $(cflags-y)
+
+        # temporary until string.h is fixed
+        KBUILD_CFLAGS += -ffreestanding
+else
+        BITS := 64
+        UTS_MACHINE := x86_64
+        CHECKFLAGS += -D__x86_64__ -m64
+
+        biarch := -m64
+        KBUILD_AFLAGS += -m64
+        KBUILD_CFLAGS += -m64
+
+        # Don't autogenerate traditional x87 instructions
+        KBUILD_CFLAGS += $(call cc-option,-mno-80387)
+        KBUILD_CFLAGS += $(call cc-option,-mno-fp-ret-in-387)
+
+	# Use -mpreferred-stack-boundary=3 if supported.
+	KBUILD_CFLAGS += $(call cc-option,-mpreferred-stack-boundary=3)
+
+        # FIXME - should be integrated in Makefile.cpu (Makefile_32.cpu)
+        cflags-$(CONFIG_MK8) += $(call cc-option,-march=k8)
+        cflags-$(CONFIG_MPSC) += $(call cc-option,-march=nocona)
+
+        cflags-$(CONFIG_MCORE2) += \
+                $(call cc-option,-march=core2,$(call cc-option,-mtune=generic))
+	cflags-$(CONFIG_MATOM) += $(call cc-option,-march=atom) \
+		$(call cc-option,-mtune=atom,$(call cc-option,-mtune=generic))
+        cflags-$(CONFIG_GENERIC_CPU) += $(call cc-option,-mtune=generic)
+        KBUILD_CFLAGS += $(cflags-y)
+
+        KBUILD_CFLAGS += -mno-red-zone
+        KBUILD_CFLAGS += -mcmodel=kernel
+
+        # -funit-at-a-time shrinks the kernel .text considerably
+        # unfortunately it makes reading oopses harder.
+        KBUILD_CFLAGS += $(call cc-option,-funit-at-a-time)
+
+        # this works around some issues with generating unwind tables in older gccs
+        # newer gccs do it by default
+        KBUILD_CFLAGS += $(call cc-option,-maccumulate-outgoing-args)
+endif
+
+# Make sure compiler does not have buggy stack-protector support.
+ifdef CONFIG_CC_STACKPROTECTOR
+	cc_has_sp := $(srctree)/scripts/gcc-x86_$(BITS)-has-stack-protector.sh
+        ifneq ($(shell $(CONFIG_SHELL) $(cc_has_sp) $(CC) $(KBUILD_CPPFLAGS) $(biarch)),y)
+                $(warning stack-protector enabled but compiler support broken)
+        endif
+endif
+
+ifdef CONFIG_X86_X32
+	x32_ld_ok := $(call try-run,\
+			/bin/echo -e '1: .quad 1b' | \
+			$(CC) $(KBUILD_AFLAGS) -c -x assembler -o "$$TMP" - && \
+			$(OBJCOPY) -O elf32-x86-64 "$$TMP" "$$TMPO" && \
+			$(LD) -m elf32_x86_64 "$$TMPO" -o "$$TMP",y,n)
+        ifeq ($(x32_ld_ok),y)
+                CONFIG_X86_X32_ABI := y
+                KBUILD_AFLAGS += -DCONFIG_X86_X32_ABI
+                KBUILD_CFLAGS += -DCONFIG_X86_X32_ABI
+        else
+                $(warning CONFIG_X86_X32 enabled but no binutils support)
+        endif
+endif
+export CONFIG_X86_X32_ABI
+
+# Don't unroll struct assignments with kmemcheck enabled
+ifeq ($(CONFIG_KMEMCHECK),y)
+	KBUILD_CFLAGS += $(call cc-option,-fno-builtin-memcpy)
+endif
+
+# Stackpointer is addressed different for 32 bit and 64 bit x86
+sp-$(CONFIG_X86_32) := esp
+sp-$(CONFIG_X86_64) := rsp
+
+# do binutils support CFI?
+cfi := $(call as-instr,.cfi_startproc\n.cfi_rel_offset $(sp-y)$(comma)0\n.cfi_endproc,-DCONFIG_AS_CFI=1)
+# is .cfi_signal_frame supported too?
+cfi-sigframe := $(call as-instr,.cfi_startproc\n.cfi_signal_frame\n.cfi_endproc,-DCONFIG_AS_CFI_SIGNAL_FRAME=1)
+cfi-sections := $(call as-instr,.cfi_sections .debug_frame,-DCONFIG_AS_CFI_SECTIONS=1)
+
+# does binutils support specific instructions?
+asinstr := $(call as-instr,fxsaveq (%rax),-DCONFIG_AS_FXSAVEQ=1)
+asinstr += $(call as-instr,pshufb %xmm0$(comma)%xmm0,-DCONFIG_AS_SSSE3=1)
+asinstr += $(call as-instr,crc32l %eax$(comma)%eax,-DCONFIG_AS_CRC32=1)
+avx_instr := $(call as-instr,vxorps %ymm0$(comma)%ymm1$(comma)%ymm2,-DCONFIG_AS_AVX=1)
+avx2_instr :=$(call as-instr,vpbroadcastb %xmm0$(comma)%ymm1,-DCONFIG_AS_AVX2=1)
+
+KBUILD_AFLAGS += $(cfi) $(cfi-sigframe) $(cfi-sections) $(asinstr) $(avx_instr) $(avx2_instr)
+KBUILD_CFLAGS += $(cfi) $(cfi-sigframe) $(cfi-sections) $(asinstr) $(avx_instr) $(avx2_instr)
+
+LDFLAGS := -m elf_$(UTS_MACHINE)
+
+# Speed up the build
+KBUILD_CFLAGS += -pipe
+# Workaround for a gcc prelease that unfortunately was shipped in a suse release
+KBUILD_CFLAGS += -Wno-sign-compare
+#
+KBUILD_CFLAGS += -fno-asynchronous-unwind-tables
+# prevent gcc from generating any FP code by mistake
+KBUILD_CFLAGS += -mno-sse -mno-mmx -mno-sse2 -mno-3dnow
+KBUILD_CFLAGS += $(call cc-option,-mno-avx,)
+
+KBUILD_CFLAGS += $(mflags-y)
+KBUILD_AFLAGS += $(mflags-y)
+
+archscripts: scripts_basic
+	$(Q)$(MAKE) $(build)=arch/x86/tools relocs
+
+###
+# Syscall table generation
+
+archheaders:
+	$(Q)$(MAKE) $(build)=arch/x86/syscalls all
+
+archprepare:
+ifeq ($(CONFIG_KEXEC_FILE),y)
+	$(Q)$(MAKE) $(build)=arch/x86/purgatory arch/x86/purgatory/kexec-purgatory.c
+endif
+
+###
+# Kernel objects
+
+head-y := arch/x86/kernel/head_$(BITS).o
+head-y += arch/x86/kernel/head$(BITS).o
+head-y += arch/x86/kernel/head.o
+
+libs-y  += arch/x86/lib/
+
+# See arch/x86/Kbuild for content of core part of the kernel
+core-y += arch/x86/
+
+# drivers-y are linked after core-y
+drivers-$(CONFIG_MATH_EMULATION) += arch/x86/math-emu/
+drivers-$(CONFIG_PCI)            += arch/x86/pci/
+
+# must be linked after kernel/
+drivers-$(CONFIG_OPROFILE) += arch/x86/oprofile/
+
+# suspend and hibernation support
+drivers-$(CONFIG_PM) += arch/x86/power/
+
+drivers-$(CONFIG_FB) += arch/x86/video/
+
+####
+# boot loader support. Several targets are kept for legacy purposes
+
+boot := arch/x86/boot
+
+BOOT_TARGETS = bzlilo bzdisk fdimage fdimage144 fdimage288 isoimage
+
+PHONY += bzImage $(BOOT_TARGETS)
+
+# Default kernel to build
+all: bzImage
+
+# KBUILD_IMAGE specify target image being built
+KBUILD_IMAGE := $(boot)/bzImage
+
+bzImage: vmlinux
+ifeq ($(CONFIG_X86_DECODER_SELFTEST),y)
+	$(Q)$(MAKE) $(build)=arch/x86/tools posttest
+endif
+	$(Q)$(MAKE) $(build)=$(boot) $(KBUILD_IMAGE)
+	$(Q)mkdir -p $(objtree)/arch/$(UTS_MACHINE)/boot
+	$(Q)ln -fsn ../../x86/boot/bzImage $(objtree)/arch/$(UTS_MACHINE)/boot/$@
+
+$(BOOT_TARGETS): vmlinux
+	$(Q)$(MAKE) $(build)=$(boot) $@
+
+PHONY += install
+install:
+	$(Q)$(MAKE) $(build)=$(boot) $@
+
+PHONY += vdso_install
+vdso_install:
+	$(Q)$(MAKE) $(build)=arch/x86/vdso $@
+
+archclean:
+	$(Q)rm -rf $(objtree)/arch/i386
+	$(Q)rm -rf $(objtree)/arch/x86_64
+	$(Q)$(MAKE) $(clean)=$(boot)
+	$(Q)$(MAKE) $(clean)=arch/x86/tools
+	$(Q)$(MAKE) $(clean)=arch/x86/purgatory
+
+define archhelp
+  echo  '* bzImage      - Compressed kernel image (arch/x86/boot/bzImage)'
+  echo  '  install      - Install kernel using'
+  echo  '                  (your) ~/bin/$(INSTALLKERNEL) or'
+  echo  '                  (distribution) /sbin/$(INSTALLKERNEL) or'
+  echo  '                  install to $$(INSTALL_PATH) and run lilo'
+  echo  '  fdimage      - Create 1.4MB boot floppy image (arch/x86/boot/fdimage)'
+  echo  '  fdimage144   - Create 1.4MB boot floppy image (arch/x86/boot/fdimage)'
+  echo  '  fdimage288   - Create 2.8MB boot floppy image (arch/x86/boot/fdimage)'
+  echo  '  isoimage     - Create a boot CD-ROM image (arch/x86/boot/image.iso)'
+  echo  '                  bzdisk/fdimage*/isoimage also accept:'
+  echo  '                  FDARGS="..."  arguments for the booted kernel'
+  echo  '                  FDINITRD=file initrd for the booted kernel'
+endef