Add simplefs as new artifact

To enhance the guest OS functionality, this commit integrates the
simplefs kernel module to support an additional filesystem. It appends
simplefs as a new Linux image artifact and automatically builds the
latest simplefs.ko when make build-linux-image is executed.

simplefs: https://github.com/sysprog21/simplefs

Author: ChinYikMing

mk/artifact.mk

@@ -137,6 +137,7 @@ else
 ifeq ($(call has, SYSTEM), 1)
 	$(Q)(cd $(BIN_DIR) && $(SHA1SUM) linux-image/Image >> sha1sum-linux-image)
 	$(Q)(cd $(BIN_DIR) && $(SHA1SUM) linux-image/rootfs.cpio >> sha1sum-linux-image)
+	$(Q)(cd $(BIN_DIR) && $(SHA1SUM) linux-image/simplefs.ko >> sha1sum-linux-image)
 else
 	git submodule update --init $(addprefix ./tests/,$(foreach tb,$(TEST_SUITES),$(tb)))
 	$(Q)for tb in $(TEST_SUITES); do \

mk/external.mk

@@ -137,6 +137,13 @@ LINUX_DATA_SHA = $(shell wget -q -O- $(LINUX_CDN_VERSION_URL)/sha256sums.asc | \
                          grep $(LINUX_DATA) | awk '{print $$1}')
 LINUX_DATA_SHA_CMD = $(SHA256SUM)
 
+# simplefs
+SIMPLEFS_VERSION = master
+SIMPLEFS_DATA = /tmp/simplefs
+SIMPLEFS_DATA_URL = git clone https://github.com/sysprog21/simplefs $(SIMPLEFS_DATA) -b $(SIMPLEFS_VERSION) --depth=1
+SIMPLEFS_DATA_SHA = 863936f72e0781b240c5ec4574510c57f0394b99
+SIMPLEFS_DATA_SHA_CMD = $(SHA1SUM)
+
 define download-extract-verify
 $($(T)_DATA):
 	$(Q)$$(call prologue,$$@)
@@ -146,5 +153,5 @@ $($(T)_DATA):
 	$(Q)$$(call epilogue,$(notdir $($(T)_DATA_URL)),$(SHA_FILE1),$(SHA_FILE2))
 endef
 
-EXTERNAL_DATA = DOOM QUAKE TIMIDITY BUILDROOT LINUX
+EXTERNAL_DATA = DOOM QUAKE TIMIDITY BUILDROOT LINUX SIMPLEFS
 $(foreach T,$(EXTERNAL_DATA),$(eval $(download-extract-verify)))

mk/tools.mk

@@ -35,7 +35,7 @@ $(HIST_BIN): $(HIST_OBJS)
 TOOLS_BIN += $(HIST_BIN)
 
 # Build Linux image
-LINUX_IMAGE_SRC = $(BUILDROOT_DATA) $(LINUX_DATA)
+LINUX_IMAGE_SRC = $(BUILDROOT_DATA) $(LINUX_DATA) $(SIMPLEFS_DATA)
 build-linux-image: $(LINUX_IMAGE_SRC)
 	$(Q)./tools/build-linux-image.sh
 	$(Q)$(PRINTF) "Build done.\n"

tools/build-linux-image.sh

@@ -51,5 +51,14 @@ function do_linux
     cp -f $SRC_DIR/linux/arch/riscv/boot/Image $OUTPUT_DIR
 }
 
+function do_simplefs
+{
+    pushd $SRC_DIR/simplefs
+    ASSERT make KDIR=$SRC_DIR/linux $PARALLEL
+    popd
+    cp -f $SRC_DIR/simplefs/simplefs.ko $OUTPUT_DIR
+}
+
 do_buildroot && OK
 do_linux && OK
+do_simplefs && OK