diff options
Diffstat (limited to 'classes/qemuboot-xen-u-boot.bbclass')
-rw-r--r-- | classes/qemuboot-xen-u-boot.bbclass | 128 |
1 files changed, 128 insertions, 0 deletions
diff --git a/classes/qemuboot-xen-u-boot.bbclass b/classes/qemuboot-xen-u-boot.bbclass new file mode 100644 index 00000000..4401eba2 --- /dev/null +++ b/classes/qemuboot-xen-u-boot.bbclass @@ -0,0 +1,128 @@ +# Enable booting Xen with qemuboot / runqemu: u-boot configuration +# +# Copyright (c) 2021-2022 Star Lab Corp. All rights reserved. +# +# Author: Christopher Clark <christopher.clark@starlab.io> + +# Interface variables: +# +# QB_XEN_U_BOOT_SCR : +# If this variable is set, this class will generate the u-boot script image file +# It must be set to the name of the compiled command file that u-boot will tftp +# from the image deploy directory during boot, currently: "boot.scr.uimg" +# +# QB_XEN_CMDLINE_EXTRA : +# A string to be appended to the default Xen hypervisor boot command line, +# for supplying Xen boot options. +# The device tree that this bbclass generates will contain Xen command +# line options to connect the Xen console to the Qemu serial port. +# +# QB_XEN_LOAD_ADDR : +# The hypervisor load address +# +# QB_XEN_DOM0_BOOTARGS : +# A string for specifying Dom0 boot options for the Xen section of the device +# tree. +# +# QB_XEN_UBOOT_SCR_TASK_DEPENDS: +# The task dependencies for the u-boot script generation. A default is provided. +# +# QB_XEN_DOMAIN_MODULES: +# A space-separated list of colon-separated entries: +# "<file for the module>:<load memory address>:<module compatibility string>" + +# Set the default value for this variable to empty: no file generated. +QB_XEN_U_BOOT_SCR ??= "" + +write_add_chosen_module() { + CMD_FILE="$1" + ADDR="$2" + SIZE="$3" + MODULE_TYPE="$4" + cat <<EOF >>"${CMD_FILE}" +fdt mknod /chosen module@${ADDR} +fdt set /chosen/module@${ADDR} compatible "multiboot,module" "${MODULE_TYPE}" +fdt set /chosen/module@${ADDR} reg <${ADDR} ${SIZE}> +EOF +} + +generate_xen_u_boot_conf() { + CMD_FILE="${B}/qemuboot-xen.cmd" + cat <<EOF >"${CMD_FILE}" +echo "Running u-boot launch script" +fdt addr 0x40000000 +fdt resize +echo "Device tree resized" + +fdt set /chosen \#address-cells <1> +fdt set /chosen \#size-cells <1> + +fdt set /chosen xen,xen-bootargs "console=dtuart dtuart=/pl011@9000000 ${QB_XEN_CMDLINE_EXTRA}" +fdt set /chosen xen,dom0-bootargs "${QB_XEN_DOM0_BOOTARGS}" +EOF + + if [ -z "${QB_XEN_DOMAIN_MODULES}" ]; then + bbwarn "No domain modules: please set QB_XEN_DOMAIN_MODULES" + fi + + for DOMAIN_MODULE in ${QB_XEN_DOMAIN_MODULES} + do + MODULE_FILE="$(echo ${DOMAIN_MODULE} | cut -f1 -d:)" + ADDR="$(echo ${DOMAIN_MODULE} | cut -f2 -d:)" + MODULE_TYPE="$(echo ${DOMAIN_MODULE} | cut -f3 -d:)" + RESOLVED_FILE="$(readlink -f ${MODULE_FILE})" + SIZE=$(printf '0x%x\n' $(stat -c '%s' "${RESOLVED_FILE}")) + [ "x${SIZE}" != "x0x0" ] || bbfatal No module: "${MODULE_FILE}" + write_add_chosen_module "${CMD_FILE}" "${ADDR}" "${SIZE}" "${MODULE_TYPE}" + done + + cat <<EOF >>"${CMD_FILE}" +fdt print /chosen + +echo Boot Xen +bootz ${QB_XEN_LOAD_ADDR} - 0x40000000 +EOF + + uboot-mkimage -A "${UBOOT_ARCH}" -T script -C none \ + -a 0x20000 -e 0x20000 \ + -d "${CMD_FILE}" "${CMD_FILE}.uimg" + + # u-boot tftps this filename from DEPLOY_DIR_IMAGE: + install -m 0644 "${CMD_FILE}.uimg" "${DEPLOY_DIR_IMAGE}/${QB_XEN_U_BOOT_SCR}" +} + +do_write_qemuboot_xen_u_boot_conf() { + # Not all architectures qemuboot with u-boot, so check to see if this + # is needed. This allows this bbclass file to be used in the same image + # recipe for multiple architectures. + + if [ -n "${QB_XEN_U_BOOT_SCR}" ] && [ -n "${QB_SYSTEM_NAME}" ] ; then + generate_xen_u_boot_conf + fi +} + +addtask do_write_qemuboot_xen_u_boot_conf after do_write_qemuboot_conf before do_image +# Task dependency: +# An expected common case is that the kernel for at least one of the initial +# domains (eg. dom0) is deployed from the virtual/kernel recipe, so +# add that as a task dependency here since the kernel size needs to be known +# for generating the device tree. +# Dependencies are only introduced if a device tree will be generated. +QB_XEN_UBOOT_SCR_TASK_DEPENDS ?= " \ + ${@[ ' \ + u-boot-tools-native:do_populate_sysroot \ + u-boot:do_deploy \ + virtual/kernel:do_deploy \ + ', ''][d.getVar('QB_XEN_U_BOOT_SCR') == '']} \ + " +do_write_qemuboot_xen_u_boot_conf[depends] = "${QB_XEN_UBOOT_SCR_TASK_DEPENDS}" + +def qemuboot_xen_u_boot_vars(d): + build_vars = ['MACHINE', 'TUNE_ARCH', 'DEPLOY_DIR_IMAGE', + 'KERNEL_IMAGETYPE', 'IMAGE_NAME', 'IMAGE_LINK_NAME', + 'STAGING_DIR_NATIVE', 'STAGING_BINDIR_NATIVE', + 'STAGING_DIR_HOST', 'SERIAL_CONSOLES'] + return build_vars + [k for k in d.keys() if k.startswith('QB_')] + +do_write_qemuboot_xen_u_boot[vardeps] += "${@' '.join(qemuboot_xen_u_boot_vars(d))}" +do_write_qemuboot_xen_u_boot[vardepsexclude] += "TOPDIR" |