microdroid/Android.bp

package {
    default_applicable_licenses: ["Android-Apache-2.0"],
}

microdroid_shell_and_utilities = [
    "reboot",
    "sh",
    "toolbox",
    "toybox",
]

microdroid_rootdirs = [
    "dev",
    "proc",
    "sys",

    "system",
    "vendor",
    "debug_ramdisk",
    "mnt",
    "data",

    "apex",
    "linkerconfig",
    "second_stage_resources",
    "postinstall",
]

microdroid_symlinks = [
    {
        target: "/sys/kernel/debug",
        name: "d",
    },
    {
        target: "/system/etc",
        name: "etc",
    },
]

android_system_image {
    name: "microdroid",
    use_avb: true,
    avb_private_key: ":avb_testkey_rsa4096",
    avb_algorithm: "SHA256_RSA4096",
    partition_name: "system",
    deps: [
        "init_second_stage",
        "microdroid_init_rc",
        "microdroid_build_prop",
        "ueventd.rc",
        "libbinder",
        "libstdc++",
        "logcat",
        "logd",
        "run-as",
        "secilc",

        // "com.android.adbd" requires these,
        "libadbd_auth",
        "libadbd_fs",

        "apexd",
        "debuggerd",
        "linker",
        "linkerconfig",
        "servicemanager",
        "tombstoned",
        "cgroups.json",
        "public.libraries.android.txt",

        "plat_sepolicy_and_mapping.sha256",
    ] + microdroid_shell_and_utilities,
    multilib: {
        common: {
            deps: [
                "com.android.runtime",
                "plat_sepolicy.cil",
                "plat_mapping_file",
                "plat_file_contexts",
                "plat_hwservice_contexts",
                "plat_property_contexts",
                "plat_service_contexts",
                "plat_keystore2_key_contexts",
            ],
        },
    },
    linker_config_src: "linker.config.json",
    base_dir: "system",
    dirs: microdroid_rootdirs,
    symlinks: microdroid_symlinks,
    file_contexts: "microdroid_file_contexts",
}

prebuilt_etc {
    name: "microdroid_init_rc",
    filename: "init.rc",
    src: "init.rc",
    relative_install_path: "init/hw",
    installable: false, // avoid collision with system partition's init.rc
}

prebuilt_root {
    name: "microdroid_build_prop",
    filename: "build.prop",
    src: "build.prop",
    installable: false,
}

android_filesystem {
    name: "microdroid_vendor",
    use_avb: true,
    deps: [
        "microdroid_fstab",
        "microdroid_precompiled_sepolicy",
        "microdroid_precompiled_sepolicy.plat_sepolicy_and_mapping.sha256",
    ],
    multilib: {
        common: {
            deps: [
                "microdroid_vendor_sepolicy.cil",
                "microdroid_plat_pub_versioned.cil",
                "microdroid_plat_sepolicy_vers.txt",
            ],
        },
    },
    avb_private_key: ":avb_testkey_rsa4096",
    avb_algorithm: "SHA256_RSA4096",
    file_contexts: "microdroid_vendor_file_contexts",
}

logical_partition {
    name: "microdroid_super",
    sparse: true,
    size: "auto",
    default_group: [
        {
            name: "system",
            filesystem: ":microdroid",
        },
        {
            name: "vendor",
            filesystem: ":microdroid_vendor",
        },
    ],
}

// TODO(jiyong): change the name to init, cause it's confusing
microdroid_boot_cmdline = "rdinit=/bin/init_vendor " +
    "panic=-1 " +
    // TODO(b/181936135) make the ratelimiting conditional; ratelimiting on prod build
    "printk.devkmsg=on " +
    "androidboot.first_stage_console=1 " +
    "androidboot.hardware=microdroid "

bootimg {
    name: "microdroid_boot-5.10",
    ramdisk_module: "microdroid_ramdisk-5.10",
    // We don't have kernel for arm and x86. But Soong demands one when it builds for
    // arm or x86 target. Satisfy that by providing an empty file as the kernel.
    kernel_prebuilt: "empty_kernel",
    arch: {
        arm64: {
            kernel_prebuilt: ":kernel_prebuilts-5.10-arm64",
            cmdline: microdroid_boot_cmdline +
                "androidboot.boot_devices=10000.pci",
        },
        x86_64: {
            kernel_prebuilt: ":kernel_prebuilts-5.10-x86_64",
            cmdline: microdroid_boot_cmdline +
                "pci=noacpi " +
                "androidboot.boot_devices=pci0000:00/0000:00:01.0," + // os
                "pci0000:00/0000:00:03.0," + // payload
                "pci0000:00/0000:00:04.0", // userdata
        },
    },
    dtb_prebuilt: "dummy_dtb.img",
    header_version: "4",
    partition_name: "boot",
    use_avb: true,
    avb_private_key: ":avb_testkey_rsa4096",
}

android_filesystem {
    name: "microdroid_ramdisk-5.10",
    deps: [
        "init_first_stage_soong",
    ],
    dirs: [
        "dev",
        "proc",
        "sys",

        // TODO(jiyong): remove these
        "mnt",
        "debug_ramdisk",
        "second_stage_resources",
    ],
    type: "compressed_cpio",
}

bootimg {
    name: "microdroid_vendor_boot-5.10",
    ramdisk_module: "microdroid_vendor_ramdisk-5.10",
    dtb_prebuilt: "dummy_dtb.img",
    header_version: "4",
    vendor_boot: true,
    partition_name: "vendor_boot",
    use_avb: true,
    avb_private_key: ":avb_testkey_rsa4096",
}

android_filesystem {
    name: "microdroid_vendor_ramdisk-5.10",
    arch: {
        arm64: {
            deps: ["virt_device_prebuilts_kernel_modules-5.10-arm64"],
        },
        x86_64: {
            deps: ["virt_device_prebuilts_kernel_modules-5.10-x86_64"],
        },
    },
    deps: [
        "microdroid_fstab",
    ],
    base_dir: "first_stage_ramdisk",
    type: "compressed_cpio",
    symlinks: [
        {
            target: "etc/fstab",
            name: "first_stage_ramdisk/fstab.microdroid",
        },
        {
            target: "first_stage_ramdisk/lib",
            name: "lib",
        },
    ],
}

prebuilt_etc {
    name: "microdroid_fstab",
    src: "fstab",
    filename: "fstab",
    installable: false,
}

prebuilt_etc {
    name: "microdroid_bootloader",
    src: ":microdroid_bootloader_gen",
    arch: {
        x86_64: {
            // For unknown reason, the signed bootloader doesn't work on x86_64. Until the problem
            // is fixed, let's use the unsigned bootloader for the architecture.
            // TODO(b/185115783): remove this
            src: ":cuttlefish_crosvm_bootloader",
        },
    },
    filename: "microdroid_bootloader",
}

// See external/avb/avbtool.py
// MAX_VBMETA_SIZE=64KB, MAX_FOOTER_SIZE=4KB
avb_hash_footer_kb = "68"

genrule {
    name: "microdroid_bootloader_gen",
    tools: ["avbtool"],
    srcs: [
        ":cuttlefish_crosvm_bootloader",
        ":avb_testkey_rsa4096",
    ],
    out: ["bootloader-signed"],
    // 1. Copy the input to the output becaise avbtool modifies --image in
    // place.
    // 2. Check if the file is big enough. For arm and x86 we have fake
    // bootloader file whose size is 1. It can't pass avbtool.
    // 3. Add the hash footer. The partition size is set to (image size + 68KB)
    // rounded up to 4KB boundary.
    cmd: "cp $(location :cuttlefish_crosvm_bootloader) $(out) && " +
        "if [ $$(stat --format=%s $(out)) -gt 4096 ]; then " +
        "$(location avbtool) add_hash_footer " +
        "--algorithm SHA256_RSA4096 " +
        "--partition_name bootloader " +
        "--key $(location :avb_testkey_rsa4096) " +
        "--partition_size $$(( " + avb_hash_footer_kb + " * 1024 + ( $$(stat --format=%s $(out)) + 4096 - 1 ) / 4096 * 4096 )) " +
        "--image $(out)" +
        "; fi",
}

prebuilt_etc {
    name: "microdroid_uboot_env",
    src: ":microdroid_uboot_env_gen",
    arch: {
        x86_64: {
            src: ":microdroid_uboot_env_gen_x86_64",
        },
    },
    filename: "uboot_env.img",
}

genrule {
    name: "microdroid_uboot_env_gen",
    tools: ["mkenvimage_host"],
    srcs: ["uboot-env.txt"],
    out: ["output.img"],
    cmd: "$(location mkenvimage_host) -s 4096 -o $(out) $(in)",
}

genrule {
    name: "microdroid_uboot_env_gen_x86_64",
    tools: ["mkenvimage_host"],
    srcs: ["uboot-env-x86_64.txt"],
    out: ["output.img"],
    cmd: "$(location mkenvimage_host) -s 4096 -o $(out) $(in)",
}

// sepolicy sha256 for vendor
prebuilt_etc {
    name: "microdroid_precompiled_sepolicy.plat_sepolicy_and_mapping.sha256",
    src: ":plat_sepolicy_and_mapping.sha256_gen",
    filename: "precompiled_sepolicy.plat_sepolicy_and_mapping.sha256",
    relative_install_path: "selinux",
    installable: false,
}

genrule {
    name: "microdroid_precompiled_sepolicy_gen",
    tools: ["secilc"],
    srcs: [
        ":plat_sepolicy.cil",
        ":plat_mapping_file",
        ":microdroid_plat_pub_versioned.cil",
        ":microdroid_vendor_sepolicy.cil",
    ],
    out: ["precompiled_sepolicy"],
    cmd: "$(location secilc) -m -M true -G -c 30 $(in) -o $(out) -f /dev/null",
}

prebuilt_etc {
    name: "microdroid_precompiled_sepolicy",
    src: ":microdroid_precompiled_sepolicy_gen",
    filename: "precompiled_sepolicy",
    relative_install_path: "selinux",
    installable: false,
}

vbmeta {
    name: "microdroid_vbmeta",
    partition_name: "vbmeta",
    private_key: ":avb_testkey_rsa4096",
    partitions: [
        "microdroid_vendor",
        "microdroid_vendor_boot-5.10",
    ],
    chained_partitions: [
        {
            name: "vbmeta_system",
            rollback_index_location: 1,
            private_key: ":avb_testkey_rsa4096",
        },
        {
            name: "boot",
            rollback_index_location: 2,
            private_key: ":avb_testkey_rsa4096",
        },
    ],
}

vbmeta {
    name: "microdroid_vbmeta_system",
    partition_name: "vbmeta_system",
    private_key: ":avb_testkey_rsa4096",
    partitions: [
        "microdroid",
    ],
}

prebuilt_etc {
    name: "microdroid_cdisk.json",
    src: "microdroid_cdisk.json",
}

prebuilt_etc {
    name: "microdroid_cdisk_env.json",
    src: "microdroid_cdisk_env.json",
}

prebuilt_etc {
    name: "microdroid_cdisk_userdata.json",
    src: "microdroid_cdisk_userdata.json",
}

prebuilt_etc {
    name: "microdroid_payload.json",
    src: "microdroid_payload.json",
}