initial qemu support

Signed-off-by: enes.colpan <[email protected]>

Kconfig

@@ -101,7 +101,7 @@ endif
 # Provide two entries so that the help text can be adjusted to the image.
 config SECURE_BOOT
 	bool "Secure boot & Data encryption"
-	depends on IMAGE_SWUPDATE
+	depends on IMAGE_SWUPDATE && !IMAGE_QEMU
 	help
 	  Enable signing of boot artifacts (boot loader, unified kernel image).
 	  Furthermore activate dm-verity integrity protection for the read-only
@@ -149,6 +149,24 @@ config RPMB_SETUP
 	   only in a secure environment on the target device, then replace it
 	   with signed production firmware and enable secure boot.
 
+config IMAGE_QEMU
+	bool "QEMU Image"
+	depends on IMAGE_EXAMPLE || IMAGE_SWUPDATE
+	help
+	  QEMU image to boot image without real hardware. The device emulated
+	  by QEMU is not identical to a physical IOT2050. This leads to missing
+	  or limited features such as Arduino I/Os, only one ethernet port,
+	  virtual debug serial port, qemu version of u-boot, no watchdog, only
+	  virtual drives, performance issues etc.
+
+	  WARNING: Please be aware of potential problems when using the image
+	  for testing purposes.
+
+config KAS_INCLUDE_QEMU_IMAGE
+	string
+	default "kas-iot2050-qemu.yml"
+	depends on IMAGE_QEMU
+
 config KAS_INCLUDE_SECURE_BOOT
 	string
 	default "kas/opt/secure-boot.yml"

README.md

@@ -58,6 +58,24 @@ The SDK is also available as docker image. To import it into a docker host, run
 docker load -i build/tmp/deploy/images/iot2050/sdk-iot2050-debian-arm64-docker-archive.tar.xz
 ```
 
+## Build qemu image
+
+To boot IOT2050 image from qemu, you need a customized image for proper booting.
+Please use kas menu with the following command and select qemu image for target build
+with example image or example image with swupdate support
+
+```shell
+./kas-container menu
+```
+
+Then below command can be used to boot qemu image on a platform that
+qemu-system-aarch64 is installed.
+
+Run qemu:
+```shell
+/bin/sh start-qemu-iot2050.sh"
+```
+
 ## Clean build result
 
 ```shell

conf/machine/iot2050-qemu.conf

@@ -0,0 +1,19 @@
+#
+# Copyright (c) Siemens AG, 2023
+#
+# Authors:
+#  Enes Colpan <[email protected]>
+#
+# This file is subject to the terms and conditions of the MIT License.  See
+# COPYING.MIT file in the top-level directory.
+#
+
+require conf/machine/iot2050.conf
+
+DTB_FILES = ""
+
+CONSOLE_KERNEL_PARAMS = ""
+
+QEMU_IMAGE = "1"
+
+PREFERRED_PROVIDER_u-boot-${MACHINE} = "u-boot-qemu-arm64"

conf/machine/iot2050.conf

@@ -32,3 +32,5 @@ IMAGE_INSTALL += "u-boot-script"
 
 # only relevant for SWUpdate image
 SWUPDATE_BOOTLOADER = "efibootguard"
+
+CONSOLE_KERNEL_PARAMS ?= "console=ttyS3,115200n8 earlycon=ns16550a,mmio32,0x02810000"

kas-iot2050-qemu.yml

@@ -0,0 +1,16 @@
+#
+# Copyright (c) Siemens AG, 2023
+#
+# This file is subject to the terms and conditions of the MIT License.  See
+# COPYING.MIT file in the top-level directory.
+#
+
+header:
+  version: 10
+
+machine: iot2050-qemu
+
+local_conf_header:
+  firmware-binaries: |
+    # Add U-Boot for qemu
+    IMAGER_BUILD_DEPS:append:iot2050-qemu = " u-boot-iot2050-qemu"

recipes-core/images/iot2050-image-base.bb

@@ -12,7 +12,7 @@ inherit image
 
 DESCRIPTION = "IOT2050 Debian Base Image"
 
-IMAGE_INSTALL += "u-boot-iot2050-config"
+IMAGE_INSTALL += "${@ 'u-boot-${MACHINE}-config' if d.getVar('QEMU_IMAGE') != '1' else '' }"
 IMAGE_INSTALL += "iot2050-firmware"
 IMAGE_INSTALL += "customizations-base"
 

recipes-core/images/iot2050-image-example.bb

@@ -40,7 +40,7 @@ IMAGE_INSTALL += " \
     node-red \
     node-red-gpio \
     node-red-preinstalled-nodes \
-    board-conf-tools \
+    ${@ 'board-conf-tools' if d.getVar('QEMU_IMAGE') != '1' else '' } \
     libteec1 \
     optee-client-dev \
     tee-supplicant \

recipes-core/images/iot2050-image-swu-example.bb

@@ -41,6 +41,6 @@ IMAGE_INSTALL:remove = "u-boot-script"
 IMAGE_INSTALL += "customizations-swupdate"
 IMAGE_INSTALL += "swupdate-handler-roundrobin"
 IMAGE_INSTALL += "swupdate-complete-update-helper"
-IMAGE_INSTALL += "iot2050-watchdog"
+IMAGE_INSTALL += "${@ 'iot2050-watchdog' if d.getVar('QEMU_IMAGE') != '1' else '' }"
 
 IMAGE_INSTALL:append:secureboot = " iot2050-efivarfs-helper"

start-qemu-iot2050.sh

@@ -0,0 +1,81 @@
+#!/bin/sh
+#
+# This script is derived from isar-cip-core
+# repository for meta-iot2050.
+#
+# Copyright (c) Siemens AG, 2023
+#
+# Authors:
+#  Enes Colpan <[email protected]>
+#
+# SPDX-License-Identifier: MIT
+#
+
+DISTRO_RELEASE="iot2050-debian"
+MACHINE="iot2050-qemu"
+
+usage()
+{
+	echo "Usage: $0 [QEMU_OPTIONS]"
+	echo
+	echo "The architecture defaults to the setting in .config.yaml and can be left out"
+	echo "if the built was done via \"kas-container menu\"."
+	echo
+	echo "Environment variables (default to settings in .config.yaml):"
+	echo "  QEMU_PATH         use a locally built QEMU version"
+	echo "  IMAGE_SWUPDATE    boot swupdate image"
+	echo "  IMAGE_EXAMPLE     boot example image"
+	exit 1
+}
+
+if grep -s -q "IMAGE_QEMU: false" .config.yaml; then
+	echo "Please select IMAGE_QEMU and rebuild image. The current image is not compatible with QEMU!"
+	usage
+fi
+
+QEMU=qemu-system-aarch64
+QEMU_COMMON_OPTIONS=" \
+	-cpu cortex-a53 \
+	-smp 4 \
+	-m 2G \
+	-serial mon:stdio \
+	-netdev user,id=net,hostfwd=tcp:127.0.0.1:22222-:22 \
+	-machine virt \
+	-device virtio-serial-device \
+	-device virtconsole,chardev=con -chardev vc,id=con \
+	-device virtio-blk-device,drive=disk \
+	-device virtio-net-device,netdev=net"
+KERNEL_CMDLINE=" \
+	root=/dev/vda1 rw"
+
+if grep -s -q "IMAGE_EXAMPLE: true" .config.yaml; then
+	TARGET_IMAGE="iot2050-image-example"
+elif grep -s -q "IMAGE_SWUPDATE: true" .config.yaml; then
+	SWUPDATE_BOOT="true"
+	TARGET_IMAGE="iot2050-image-swu-example"
+fi
+
+BASE_DIR=$(readlink -f $(dirname $0))
+IMAGE_PREFIX="${BASE_DIR}/build/tmp/deploy/images/${MACHINE}/${TARGET_IMAGE}-${DISTRO_RELEASE}-${MACHINE}"
+
+if [ -n "${SWUPDATE_BOOT}" ]; then
+
+	u_boot_bin=${FIRMWARE_BIN:-./build/tmp/deploy/images/${MACHINE}/firmware.bin}
+
+	${QEMU_PATH}${QEMU} \
+		-drive file=${IMAGE_PREFIX}.wic,discard=unmap,if=none,id=disk,format=raw \
+		-bios ${u_boot_bin} \
+		${QEMU_COMMON_OPTIONS} ${QEMU_EXTRA_ARGS} "$@"
+
+else
+	IMAGE_FILE=$(ls ${IMAGE_PREFIX}.wic)
+
+	KERNEL_FILE=$(ls ${IMAGE_PREFIX}-vmlinu* | tail -1)
+	INITRD_FILE=$(ls ${IMAGE_PREFIX}-initrd.img* | tail -1)
+
+	${QEMU_PATH}${QEMU} \
+		-drive file=${IMAGE_FILE},discard=unmap,if=none,id=disk,format=raw \
+		-kernel ${KERNEL_FILE} -append "${KERNEL_CMDLINE}" \
+		-initrd ${INITRD_FILE} \
+		${QEMU_COMMON_OPTIONS} "$@"
+fi

wic/iot2050-swu.wks.in

@@ -17,4 +17,4 @@ part --source empty --align 1024 --fixed-size 4G --uuid "${ABROOTFS_PART_UUID_B}
 part /var --source rootfs --rootfs-dir=${IMAGE_ROOTFS}/var --label var --fstype=ext4 --mkfs-extraopts "-T default" --ondisk sda --align 1024  --size 512M
 part /home --source rootfs --rootfs-dir=${IMAGE_ROOTFS}/home --label home --fstype=ext4 --mkfs-extraopts "-T default" --ondisk sda --align 1024  --size 512M
 
-bootloader --ptable gpt --append "console=ttyS3,115200n8 earlycon=ns16550a,mmio32,0x02810000 rootwait watchdog.handle_boot_enabled=0 ${EXTRA_KERNEL_PARAMS}"
+bootloader --ptable gpt --append "${CONSOLE_KERNEL_PARAMS} rootwait watchdog.handle_boot_enabled=0 ${EXTRA_KERNEL_PARAMS}"