[vs][multi-asic]: Add support to build multi-asic vs images (#8270)

Why I did it
Pre-requisite: #8269
To be able to generate multi-asic KVM image.
To provide flexibility to generate single asic or both single and multi-asic images.
How I did it
Add a new build param, BUILD_MULTIASIC_KVM, if set to "y", the multi-asic VS target KVM images will be generated. If not, only single asic VS image will be generated.
Make changes to build_image.sh to generate 4-asic and 6-asic KVM images if BUILD_MULTIASIC_KVM parameter is set to y
How to verify it
Generate single-asic VS as currently done, no change in build steps:
make configure PLATFORM=vs
make target/sonic-vs.img.gz - will generate only single asic KVM image.

make BUILD_MULTIASIC_KVM=y target/sonic-vs.img.gz - will generate single asic and multi-asic KVM images.
should generate:
sonic-vs.bin
sonic-vs.img.gz
sonic-4asic-vs.img.gz
sonic-6asic-vs.img.gz

Makefile.work

@@ -280,6 +280,7 @@ SONIC_BUILD_INSTRUCTION :=  make \
                            SONIC_ENABLE_IMAGE_SIGNATURE=$(ENABLE_IMAGE_SIGNATURE) \
                            ENABLE_HOST_SERVICE_ON_START=$(ENABLE_HOST_SERVICE_ON_START) \
                            SLAVE_DIR=$(SLAVE_DIR) \
+                           BUILD_MULTIASIC_KVM=$(BUILD_MULTIASIC_KVM) \
                            $(SONIC_OVERRIDE_BUILD_VARS)
 
 .PHONY: sonic-slave-build sonic-slave-bash init reset

build_image.sh

@@ -25,6 +25,47 @@ fi
 
 IMAGE_VERSION="${SONIC_IMAGE_VERSION}"
 
+generate_kvm_image()
+{
+    NUM_ASIC=$1
+    if [ $NUM_ASIC == 4 ]; then 
+         KVM_IMAGE=$OUTPUT_KVM_4ASIC_IMAGE
+         RECOVERY_ISO=$onie_recovery_kvm_4asic_image
+    elif [ $NUM_ASIC == 6 ]; then
+         KVM_IMAGE=$OUTPUT_KVM_6ASIC_IMAGE
+         RECOVERY_ISO=$onie_recovery_kvm_6asic_image
+    else 
+         KVM_IMAGE=$OUTPUT_KVM_IMAGE
+         RECOVERY_ISO=$onie_recovery_image
+         NUM_ASIC=1
+    fi
+
+    echo "Build $NUM_ASIC-asic KVM image"
+    KVM_IMAGE_DISK=${KVM_IMAGE%.gz}
+    sudo rm -f $KVM_IMAGE_DISK $KVM_IMAGE_DISK.gz
+
+    SONIC_USERNAME=$USERNAME PASSWD=$PASSWORD sudo -E ./scripts/build_kvm_image.sh $KVM_IMAGE_DISK $RECOVERY_ISO $OUTPUT_ONIE_IMAGE $KVM_IMAGE_DISK_SIZE
+
+    if [ $? -ne 0 ]; then
+        echo "Error : build kvm image failed"
+        exit 1
+    fi
+
+    [ -r $KVM_IMAGE_DISK ] || {
+        echo "Error : $KVM_IMAGE_DISK not generated!"
+        exit 1
+    }
+
+    gzip $KVM_IMAGE_DISK
+
+    [ -r $KVM_IMAGE_DISK.gz ] || {
+        echo "Error : gzip $KVM_IMAGE_DISK failed!"
+        exit 1
+    }
+
+    echo "The compressed kvm image is in $KVM_IMAGE_DISK.gz"
+}
+
 generate_onie_installer_image()
 {
     # Copy platform-specific ONIE installer config files where onie-mk-demo.sh expects them
@@ -93,32 +134,16 @@ elif [ "$IMAGE_TYPE" = "raw" ]; then
 
 elif [ "$IMAGE_TYPE" = "kvm" ]; then
 
-    echo "Build KVM image"
-    KVM_IMAGE_DISK=${OUTPUT_KVM_IMAGE%.gz}
-    sudo rm -f $KVM_IMAGE_DISK $KVM_IMAGE_DISK.gz
-
     generate_onie_installer_image
-
-    SONIC_USERNAME=$USERNAME PASSWD=$PASSWORD sudo -E ./scripts/build_kvm_image.sh $KVM_IMAGE_DISK $onie_recovery_image $OUTPUT_ONIE_IMAGE $KVM_IMAGE_DISK_SIZE
-
-    if [ $? -ne 0 ]; then
-        echo "Error : build kvm image failed"
-        exit 1
+    # Generate single asic KVM image
+    generate_kvm_image
+    if [ "$BUILD_MULTIASIC_KVM" == "y" ]; then
+        # Genrate 4-asic KVM image
+        generate_kvm_image 4
+        # Generate 6-asic KVM image
+        generate_kvm_image 6
     fi
 
-    [ -r $KVM_IMAGE_DISK ] || {
-        echo "Error : $KVM_IMAGE_DISK not generated!"
-        exit 1
-    }
-
-    gzip $KVM_IMAGE_DISK
-
-    [ -r $KVM_IMAGE_DISK.gz ] || {
-        echo "Error : gzip $KVM_IMAGE_DISK failed!"
-        exit 1
-    }
-
-    echo "The compressed kvm image is in $KVM_IMAGE_DISK.gz"
 
 ## Use 'aboot' as target machine category which includes Aboot as bootloader
 elif [ "$IMAGE_TYPE" = "aboot" ]; then

onie-image.conf

@@ -50,3 +50,9 @@ OUTPUT_ABOOT_IMAGE=target/sonic-aboot-$TARGET_MACHINE.swi
 
 ## Aboot boot image name
 ABOOT_BOOT_IMAGE=.sonic-boot.swi
+
+## Output file name for 4-asic kvm image
+OUTPUT_KVM_4ASIC_IMAGE=target/sonic-4asic-$TARGET_MACHINE.img
+
+### Output file name for 6-asic kvm image
+OUTPUT_KVM_6ASIC_IMAGE=target/sonic-6asic-$TARGET_MACHINE.img

rules/config

@@ -196,3 +196,6 @@ SONIC_VERSION_CONTROL_COMPONENTS ?= none
 # Set the env variable ENABLE_DOCKER_BASE_PULL = y to enable pulling sonic-slave docker from registry
 REGISTRY_PORT ?= 443
 REGISTRY_SERVER ?= sonicdev-microsoft.azurecr.io
+
+# BUILD_MULTIASIC_KVM - if set to y multi-asic KVM images will be generated.
+BUILD_MULTIASIC_KVM = n

slave.mk

@@ -218,6 +218,10 @@ endif
 MAKEFLAGS += -j $(SONIC_BUILD_JOBS)
 export SONIC_CONFIG_MAKE_JOBS
 
+ifeq ($(CONFIGURED_PLATFORM),vs)
+export BUILD_MULTIASIC_KVM=$(BUILD_MULTIASIC_KVM)
+endif
+
 ###############################################################################
 ## Routing stack related exports
 ###############################################################################
@@ -281,6 +285,9 @@ $(info "TELEMETRY_WRITABLE"              : "$(TELEMETRY_WRITABLE)")
 $(info "PDDF_SUPPORT"                    : "$(PDDF_SUPPORT)")
 $(info "MULTIARCH_QEMU_ENVIRON"          : "$(MULTIARCH_QEMU_ENVIRON)")
 $(info "SONIC_VERSION_CONTROL_COMPONENTS": "$(SONIC_VERSION_CONTROL_COMPONENTS)")
+ifeq ($(CONFIGURED_PLATFORM),vs)
+$(info "BUILD_MULTIASIC_KVM"             : "$(BUILD_MULTIASIC_KVM)")
+endif
 $(info )
 else
 $(info SONiC Build System for $(CONFIGURED_PLATFORM):$(CONFIGURED_ARCH))
@@ -933,6 +940,8 @@ $(addprefix $(TARGET_PATH)/, $(SONIC_INSTALLERS)) : $(TARGET_PATH)/% : \
 	export initramfs_tools="$(IMAGE_DISTRO_DEBS_PATH)/$(INITRAMFS_TOOLS)"
 	export linux_kernel="$(IMAGE_DISTRO_DEBS_PATH)/$(LINUX_KERNEL)"
 	export onie_recovery_image="$(FILES_PATH)/$(ONIE_RECOVERY_IMAGE)"
+	export onie_recovery_kvm_4asic_image="$(FILES_PATH)/$(ONIE_RECOVERY_KVM_4ASIC_IMAGE)"
+	export onie_recovery_kvm_6asic_image="$(FILES_PATH)/$(ONIE_RECOVERY_KVM_4ASIC_IMAGE)"
 	export kversion="$(KVERSION)"
 	export image_type="$($*_IMAGE_TYPE)"
 	export sonicadmin_user="$(USERNAME)"