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# Copyright 2020 The Chromium OS Authors. All rights reserved.
# Use of this source code is governed by a BSD-style license that can be
# found in the LICENSE file.
# Builds the kernel and rootfs for the guest used in integration testing.
#
# The main artifacts are:
# target/guest_under_test/bzImage
# target/guest_under_test/rootfs
ARCH ?= $(shell arch)
ifeq ($(ARCH), x86_64)
KERNEL_ARCH=x86
KERNEL_CONFIG=arch/x86/configs/chromiumos-container-vm-x86_64_defconfig
KERNEL_BINARY=bzImage
DOCKER_ARCH=amd64
CROSS_COMPILE=
RUSTFLAGS=
else ifeq ($(ARCH), aarch64)
KERNEL_ARCH=arm64
KERNEL_CONFIG=arch/arm64/configs/chromiumos-container-vm-arm64_defconfig
KERNEL_BINARY=Image
DOCKER_ARCH=arm64v8
CROSS_COMPILE=aarch64-linux-gnu-
RUSTFLAGS="-Clinker=aarch64-linux-gnu-ld"
else
$(error Only x86_64 or aarch64 are supported)
endif
# Build against the musl toolchain, which will produce a statically linked,
# portable binary that we can run on the alpine linux guest without needing
# libc at runtime
RUST_TARGET ?= $(ARCH)-unknown-linux-musl
# We are building everything in target/guest_under_test
CARGO_TARGET ?= $(shell cargo metadata --no-deps --format-version 1 | \
jq -r ".target_directory")
TARGET ?= $(CARGO_TARGET)/guest_under_test/$(ARCH)
$(shell mkdir -p $(TARGET))
# Parameteters for building the kernel locally
KERNEL_REPO ?= https://chromium.googlesource.com/chromiumos/third_party/kernel
KERNEL_BRANCH ?= chromeos-4.19
################################################################################
# Main targets
all: $(TARGET)/rootfs $(TARGET)/bzImage
clean:
rm -rf $(TARGET)
################################################################################
# Build rootfs
dockerfile := $(shell pwd)/Dockerfile
# Build rootfs from Dockerfile and export into squashfs
$(TARGET)/rootfs: $(TARGET)/rootfs-build/delegate
# Build image from Dockerfile
docker build -t crosvm_integration_test $(TARGET)/rootfs-build \
-f $(dockerfile) --build-arg ARCH=$(DOCKER_ARCH)
# Create container and export into squashfs, and don't forget to clean up
# the container afterwards.
set -x; \
CONTAINER=$$(docker create crosvm_integration_test); \
docker export $$CONTAINER | tar2sqfs -c gzip -f $@; \
docker rm $$CONTAINER
# Build and copy delegate binary into rootfs build directory
$(TARGET)/rootfs-build/delegate: delegate.rs
rustup target add $(RUST_TARGET)
rustc --edition=2018 delegate.rs --out-dir $(@D) \
$(RUSTFLAGS) --target $(RUST_TARGET)
################################################################################
# Build kernel
$(TARGET)/bzImage: $(TARGET)/kernel-source $(TARGET)/kernel-build
cd $(TARGET)/kernel-source && \
yes "" | make \
O=$(TARGET)/kernel-build \
ARCH=$(KERNEL_ARCH) CROSS_COMPILE=$(CROSS_COMPILE) \
-j$(shell nproc) $(KERNEL_BINARY)
cp $(TARGET)/kernel-build/arch/${KERNEL_ARCH}/boot/$(KERNEL_BINARY) $@
$(TARGET)/kernel-build: $(TARGET)/kernel-source
mkdir -p $@
cp -f $(TARGET)/kernel-source/$(KERNEL_CONFIG) $@/.config
$(TARGET)/kernel-source:
rm -rf $@
git clone --depth 1 --branch $(KERNEL_BRANCH) $(KERNEL_REPO) $@
.PHONY: clean all update-prebuilts