Makefile: make hypervisor from specified Kconfig

When user finish doing "make menuconfig", the .config file is saved in
acrn-config/hypervisor/build/ by default. So current Makefile will check
whether this customized .config file exists and then continue to do
following make process. But this might not true in the real user case,
user could put this customized .config file anywhere.

To resolve this problem, the patch add a KCONFIG_FILE parameter to handle
such case. When KCONFIG_FILE is specified, hypervisor could build hypervisor
with the specific configuration file.

Tracked-On: #4517

Signed-off-by: Victor Sun <victor.sun@intel.com>

Author: jsun26intel

Makefile

@@ -1,7 +1,17 @@
+# acrn-hypervisor/Makefile
 
 # global helper variables
 T := $(CURDIR)
 
+ifneq ($(KCONFIG_FILE),)
+  ifneq ($(KCONFIG_FILE), $(wildcard $(KCONFIG_FILE)))
+    $(error KCONFIG_FILE: $(KCONFIG_FILE) does not exist)
+  endif
+  override KCONFIG_FILE := $(realpath $(KCONFIG_FILE))
+else
+  override KCONFIG_FILE := $(T)/hypervisor/build/.config
+endif
+
 BOARD ?= kbl-nuc-i7
 
 ifneq (,$(filter $(BOARD),apl-mrb))
@@ -22,7 +32,6 @@ TOOLS_OUT := $(ROOT_OUT)/misc/tools
 DOC_OUT := $(ROOT_OUT)/doc
 BUILD_VERSION ?=
 BUILD_TAG ?=
-DEFAULT_MENU_CONFIG_FILE ?= $(T)/hypervisor/build/.config
 GENED_ACPI_INFO_HEADER = $(T)/hypervisor/arch/x86/configs/$(BOARD)/$(BOARD)_acpi_info.h
 HV_CFG_LOG = $(HV_OUT)/cfg.log
 
@@ -59,22 +68,22 @@ endif
 
 include $(T)/hypervisor/scripts/makefile/cfg_update.mk
 
-ifeq ($(DEFAULT_MENU_CONFIG_FILE), $(wildcard $(DEFAULT_MENU_CONFIG_FILE)))
-  BOARD_IN_MENUCONFIG := $(shell grep CONFIG_BOARD= $(DEFAULT_MENU_CONFIG_FILE) | awk -F '"' '{print $$2}')
-  SCENARIO_IN_MENUCONFIG := $(shell grep -E "SDC=y|SDC2=y|INDUSTRY=y|LOGICAL_PARTITION=y|HYBRID=y" \
-           $(DEFAULT_MENU_CONFIG_FILE) | awk -F "=" '{print $$1}' | cut -d '_' -f 2- | tr A-Z a-z)
+ifeq ($(KCONFIG_FILE), $(wildcard $(KCONFIG_FILE)))
+  BOARD_IN_KCONFIG := $(shell grep CONFIG_BOARD= $(KCONFIG_FILE) | awk -F '"' '{print $$2}')
+  SCENARIO_IN_KCONFIG := $(shell grep -E "SDC=y|SDC2=y|INDUSTRY=y|LOGICAL_PARTITION=y|HYBRID=y" \
+           $(KCONFIG_FILE) | awk -F "=" '{print $$1}' | cut -d '_' -f 2- | tr A-Z a-z)
 
-  RELEASE := $(shell grep CONFIG_RELEASE=y $(DEFAULT_MENU_CONFIG_FILE))
+  RELEASE := $(shell grep CONFIG_RELEASE=y $(KCONFIG_FILE))
   ifneq ($(RELEASE),)
     override RELEASE := 1
   endif
 
-  ifneq ($(BOARD_IN_MENUCONFIG),$(BOARD))
-    override BOARD := $(BOARD_IN_MENUCONFIG)
+  ifneq ($(BOARD_IN_KCONFIG),$(BOARD))
+    override BOARD := $(BOARD_IN_KCONFIG)
   endif
 
-  ifneq ($(SCENARIO_IN_MENUCONFIG),$(SCENARIO))
-    override SCENARIO := $(SCENARIO_IN_MENUCONFIG)
+  ifneq ($(SCENARIO_IN_KCONFIG),$(SCENARIO))
+    override SCENARIO := $(SCENARIO_IN_KCONFIG)
   endif
 
 endif
@@ -111,19 +120,17 @@ hypervisor:
 			&& [ "$(SCENARIO)" != "logical_partition" ] && [ "$(SCENARIO)" != "hybrid" ]; then \
 		echo "SCENARIO <$(SCENARIO)> is not supported. "; exit 1; \
 	fi
-	$(MAKE) -C $(T)/hypervisor HV_OBJDIR=$(HV_OUT) clean;
-	@if [ -f $(DEFAULT_MENU_CONFIG_FILE) ]; then \
-		mkdir -p $(HV_OUT) && cp $(DEFAULT_MENU_CONFIG_FILE) $(HV_OUT)/.config; \
-	else \
-		$(MAKE) -C $(T)/hypervisor HV_OBJDIR=$(HV_OUT) BOARD_FILE=$(BOARD_FILE) SCENARIO_FILE=$(SCENARIO_FILE) defconfig; \
-		echo "CONFIG_$(shell echo $(SCENARIO) | tr a-z A-Z)=y" >> $(HV_OUT)/.config;	\
+	$(MAKE) -C $(T)/hypervisor HV_OBJDIR=$(HV_OUT) BOARD_FILE=$(BOARD_FILE) SCENARIO_FILE=$(SCENARIO_FILE) clean;
+	$(MAKE) -C $(T)/hypervisor HV_OBJDIR=$(HV_OUT) BOARD_FILE=$(BOARD_FILE) SCENARIO_FILE=$(SCENARIO_FILE) defconfig;
+	@if [ -f $(KCONFIG_FILE) ]; then \
+		cp $(KCONFIG_FILE) $(HV_OUT)/.config; \
+	elif [ "$(CONFIG_XML_ENABLED)" != "true" ]; then \
+		echo "CONFIG_$(shell echo $(SCENARIO) | tr a-z A-Z)=y" >> $(HV_OUT)/.config; \
 		if [ "$(SCENARIO)" != "sdc" ]; then \
 			echo "CONFIG_MAX_KATA_VM_NUM=0" >> $(HV_OUT)/.config; \
 		fi; \
-		if [ "$(CONFIG_XML_ENABLED)" = "true" ]; then \
-			echo "CONFIG_ENFORCE_VALIDATED_ACPI_INFO=y" >> $(HV_OUT)/.config;	\
-		fi; \
-	fi
+	fi; \
+	$(MAKE) -C $(T)/hypervisor HV_OBJDIR=$(HV_OUT) BOARD_FILE=$(BOARD_FILE) SCENARIO_FILE=$(SCENARIO_FILE) oldconfig;
 	$(MAKE) -C $(T)/hypervisor HV_OBJDIR=$(HV_OUT) BOARD_FILE=$(BOARD_FILE) SCENARIO_FILE=$(SCENARIO_FILE)
 #ifeq ($(FIRMWARE),uefi)
 	@if [ "$(SCENARIO)" != "logical_partition" ] && [ "$(SCENARIO)" != "hybrid" ]; then \
@@ -132,13 +139,15 @@ hypervisor:
 	fi
 #endif
 	@echo -e "\n\033[47;30mACRN Configuration Summary:\033[0m \nBOARD = $(BOARD)\t SCENARIO = $(SCENARIO)" > $(HV_CFG_LOG); \
-	if [ -f $(DEFAULT_MENU_CONFIG_FILE) ]; then \
-		echo "Hypervisor configuration is based on menuconfig file: ./hypervisor/build/.config;" >> $(HV_CFG_LOG); \
+	if [ -f $(KCONFIG_FILE) ]; then \
+		echo -e "Hypervisor configuration is based on:\n\tKconfig file:\t$(KCONFIG_FILE);" >> $(HV_CFG_LOG); \
 	else \
-		echo "Hypervisor configuration is based on ./hypervisor/arch/x86/Kconfig and ./hypervisor/arch/x86/configs/$(BOARD).config;" >> $(HV_CFG_LOG); \
+		echo -e "Hypervisor configuration is based on:\n\t$(BOARD) defconfig file:\t$(T)/hypervisor/arch/x86/configs/$(BOARD).config;" \
+			"\n\tOthers are set by default in:\t$(T)/hypervisor/arch/x86/Kconfig;" >> $(HV_CFG_LOG); \
 	fi; \
 	if [ "$(CONFIG_XML_ENABLED)" = "true" ]; then \
-		echo "VM configuration is based on $(BOARD_FILE) and $(SCENARIO_FILE);" >> $(HV_CFG_LOG); \
+		echo -e "VM configuration is based on:\n\tBOARD File:\t$(BOARD_FILE);" \
+			"\n\tSCENARIO File:\t$(SCENARIO_FILE);" >> $(HV_CFG_LOG); \
 	else \
 		echo "VM configuration is based on current code base;" >> $(HV_CFG_LOG); \
 	fi; \