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diff --git a/cirros-testvm/src-cirros/buildroot-2015.05/fs/common.mk b/cirros-testvm/src-cirros/buildroot-2015.05/fs/common.mk
new file mode 100644
index 0000000..4387d06
--- /dev/null
+++ b/cirros-testvm/src-cirros/buildroot-2015.05/fs/common.mk
@@ -0,0 +1,117 @@
+#
+# Macro that builds the needed Makefile target to create a root
+# filesystem image.
+#
+# The following variable must be defined before calling this macro
+#
+#  ROOTFS_$(FSTYPE)_CMD, the command that generates the root
+#  filesystem image. A single command is allowed. The filename of the
+#  filesystem image that it must generate is $$@.
+#
+# The following variables can optionaly be defined
+#
+#  ROOTFS_$(FSTYPE)_DEPENDENCIES, the list of dependencies needed to
+#  build the root filesystem (usually host tools)
+#
+#  ROOTFS_$(FSTYPE)_PRE_GEN_HOOKS, a list of hooks to call before
+#  generating the filesystem image
+#
+#  ROOTFS_$(FSTYPE)_POST_TARGETS, the list of targets that should be
+#  run after running the main filesystem target. This is useful for
+#  initramfs, to rebuild the kernel once the initramfs is generated.
+#
+# In terms of configuration option, this macro assumes that the
+# BR2_TARGET_ROOTFS_$(FSTYPE) config option allows to enable/disable
+# the generation of a filesystem image of a particular type. If
+# configura options BR2_TARGET_ROOTFS_$(FSTYPE)_GZIP,
+# BR2_TARGET_ROOTFS_$(FSTYPE)_BZIP2 or
+# BR2_TARGET_ROOTFS_$(FSTYPE)_LZMA exist and are enabled, then the
+# macro will automatically generate a compressed filesystem image.
+
+FAKEROOT_SCRIPT = $(BUILD_DIR)/_fakeroot.fs
+FULL_DEVICE_TABLE = $(BUILD_DIR)/_device_table.txt
+ROOTFS_DEVICE_TABLES = $(call qstrip,$(BR2_ROOTFS_DEVICE_TABLE) \
+	$(BR2_ROOTFS_STATIC_DEVICE_TABLE))
+USERS_TABLE = $(BUILD_DIR)/_users_table.txt
+ROOTFS_USERS_TABLES = $(call qstrip,$(BR2_ROOTFS_USERS_TABLES))
+
+# Since this function will be called from within an $(eval ...)
+# all variable references except the arguments must be $$-quoted.
+define ROOTFS_TARGET_INTERNAL
+
+# extra deps
+ROOTFS_$(2)_DEPENDENCIES += host-fakeroot host-makedevs \
+	$$(if $$(PACKAGES_USERS),host-mkpasswd)
+
+ifeq ($$(BR2_TARGET_ROOTFS_$(2)_GZIP),y)
+ROOTFS_$(2)_COMPRESS_EXT = .gz
+ROOTFS_$(2)_COMPRESS_CMD = gzip -9 -c
+endif
+ifeq ($$(BR2_TARGET_ROOTFS_$(2)_BZIP2),y)
+ROOTFS_$(2)_COMPRESS_EXT = .bz2
+ROOTFS_$(2)_COMPRESS_CMD = bzip2 -9 -c
+endif
+ifeq ($$(BR2_TARGET_ROOTFS_$(2)_LZMA),y)
+ROOTFS_$(2)_DEPENDENCIES += host-lzma
+ROOTFS_$(2)_COMPRESS_EXT = .lzma
+ROOTFS_$(2)_COMPRESS_CMD = $$(LZMA) -9 -c
+endif
+ifeq ($$(BR2_TARGET_ROOTFS_$(2)_LZO),y)
+ROOTFS_$(2)_DEPENDENCIES += host-lzop
+ROOTFS_$(2)_COMPRESS_EXT = .lzo
+ROOTFS_$(2)_COMPRESS_CMD = $$(LZOP) -9 -c
+endif
+ifeq ($$(BR2_TARGET_ROOTFS_$(2)_XZ),y)
+ROOTFS_$(2)_DEPENDENCIES += host-xz
+ROOTFS_$(2)_COMPRESS_EXT = .xz
+ROOTFS_$(2)_COMPRESS_CMD = xz -9 -C crc32 -c
+endif
+
+$$(BINARIES_DIR)/rootfs.$(1): target-finalize $$(ROOTFS_$(2)_DEPENDENCIES)
+	@$$(call MESSAGE,"Generating root filesystem image rootfs.$(1)")
+	$$(foreach hook,$$(ROOTFS_$(2)_PRE_GEN_HOOKS),$$(call $$(hook))$$(sep))
+	rm -f $$(FAKEROOT_SCRIPT)
+	rm -f $$(TARGET_DIR_WARNING_FILE)
+	rm -f $$(USERS_TABLE)
+	echo "set -e" >> $$(FAKEROOT_SCRIPT)
+	echo "chown -h -R 0:0 $$(TARGET_DIR)" >> $$(FAKEROOT_SCRIPT)
+ifneq ($$(ROOTFS_DEVICE_TABLES),)
+	cat $$(ROOTFS_DEVICE_TABLES) > $$(FULL_DEVICE_TABLE)
+ifeq ($$(BR2_ROOTFS_DEVICE_CREATION_STATIC),y)
+	printf '$$(subst $$(sep),\n,$$(PACKAGES_DEVICES_TABLE))' >> $$(FULL_DEVICE_TABLE)
+endif
+	printf '$$(subst $$(sep),\n,$$(PACKAGES_PERMISSIONS_TABLE))' >> $$(FULL_DEVICE_TABLE)
+	echo "$$(HOST_DIR)/usr/bin/makedevs -d $$(FULL_DEVICE_TABLE) $$(TARGET_DIR)" >> $$(FAKEROOT_SCRIPT)
+endif
+ifneq ($$(ROOTFS_USERS_TABLES),)
+	cat $$(ROOTFS_USERS_TABLES) >> $$(USERS_TABLE)
+endif
+	printf '$$(subst $$(sep),\n,$$(PACKAGES_USERS))' >> $$(USERS_TABLE)
+	PATH=$$(BR_PATH) $$(TOPDIR)/support/scripts/mkusers $$(USERS_TABLE) $$(TARGET_DIR) >> $$(FAKEROOT_SCRIPT)
+	echo "$$(ROOTFS_$(2)_CMD)" >> $$(FAKEROOT_SCRIPT)
+	chmod a+x $$(FAKEROOT_SCRIPT)
+	PATH=$$(BR_PATH) $$(HOST_DIR)/usr/bin/fakeroot -- $$(FAKEROOT_SCRIPT)
+	$$(INSTALL) -m 0644 support/misc/target-dir-warning.txt $$(TARGET_DIR_WARNING_FILE)
+	-@rm -f $$(FAKEROOT_SCRIPT) $$(FULL_DEVICE_TABLE)
+ifneq ($$(ROOTFS_$(2)_COMPRESS_CMD),)
+	PATH=$$(BR_PATH) $$(ROOTFS_$(2)_COMPRESS_CMD) $$@ > $$@$$(ROOTFS_$(2)_COMPRESS_EXT)
+endif
+
+rootfs-$(1)-show-depends:
+	@echo $$(ROOTFS_$(2)_DEPENDENCIES)
+
+rootfs-$(1): $$(BINARIES_DIR)/rootfs.$(1) $$(ROOTFS_$(2)_POST_TARGETS)
+
+.PHONY: rootfs-$(1) rootfs-$(1)-show-depends
+
+ifeq ($$(BR2_TARGET_ROOTFS_$(2)),y)
+TARGETS_ROOTFS += rootfs-$(1)
+PACKAGES += $$(filter-out rootfs-%,$$(ROOTFS_$(2)_DEPENDENCIES))
+endif
+endef
+
+define ROOTFS_TARGET
+	$(call ROOTFS_TARGET_INTERNAL,$(1),$(call UPPERCASE,$(1)))
+endef
+
+include $(sort $(wildcard fs/*/*.mk))