configs/qemu: Enable debug shell on ttyAMA0

We set the default kernel command-line arguments to tell systemd to
spawn a debug shell on the serial console, instead of the default getty.
This will allow tests to run commands directly on the console, without
any authentication, etc.

Config.in

@@ -10,6 +10,9 @@ config AIMEEOS
 	select BR2_PACKAGE_COREUTILS
 	select BR2_PACKAGE_TAR
 	select BR2_PACKAGE_ZSTD
+	select BR2_PACKAGE_HOST_DOSFSTOOLS
+	select BR2_PACKAGE_HOST_GENIMAGE
+	select BR2_PACKAGE_HOST_MTOOLS
 	select BR2_TARGET_GRUB2
 	select BR2_PACKAGE_HOST_ZSTD
 	help
@@ -25,8 +28,10 @@ config AIMEEOS_RPI
 	select BR2_TARGET_UBOOT_NEEDS_OPENSSL
 	select BR2_TARGET_UBOOT_NEEDS_GNUTLS
 	select BR2_TARGET_GRUB2_ARM_EFI
-	select BR2_PACKAGE_HOST_DOSFSTOOLS
-	select BR2_PACKAGE_HOST_GENIMAGE
-	select BR2_PACKAGE_HOST_MTOOLS
 	help
 	  Support running Aimee OS on Rasperry Pi devices
+
+config AIMEEOS_DEFAULT_ROOTFLAGS
+	string "Default kernel command line argumens"
+	help
+	  Additional command line arguments to pass to the kernel by default.

board/qemu/genimage.cfg

@@ -0,0 +1 @@
+../raspberrypi3/genimage.cfg

board/qemu/post-image.sh

@@ -0,0 +1,18 @@
+#!/bin/sh
+
+set -e
+
+BOARD_DIR=$(dirname "$0")
+
+genimage_tmp=$(mktemp -d)
+trap 'rm -rf "${genimage_tmp}"' EXIT
+
+mkdir -p  "${genimage_tmp}"/rootfs "${genimage_tmp}"/tmp
+
+cd "${BINARIES_DIR}"
+genimage \
+	--rootpath "${genimage_tmp}/rootfs" \
+	--tmppath "${genimage_tmp}/tmp" \
+	--inputpath "${BINARIES_DIR}" \
+	--outputpath "${BINARIES_DIR}" \
+	--config "${BOARD_DIR}"/genimage.cfg

boot/grub2/gen-grub-cfg.sh

@@ -3,10 +3,11 @@
 
 vers=${BR2_EXTERNAL_AIMEEOS_VERSION}
 br2_vers=${BR2_VERSION_FULL}
+kernel_filename=$1
 
 cat > "${TARGET_DIR}"/boot/grub.cfg <<EOF
 menuentry "Aimee OS ${vers} (Buildroot ${br2_vers}) on \$dev" --class gnu-linux --id "id-\$partuuid" "\$dev" "\$partuuid" {
     set root="\$2"
-    linux "/boot/zImage" root=PARTUUID=\$3 ro
+    linux "/boot/${kernel_filename}" root=PARTUUID=\$3 ro \$rootflags
 }
 EOF

boot/grub2/grub.cfg

@@ -1,6 +1,8 @@
 # vim: set ft=sh :
 # vim: set sw=4 ts=4 sts=4 et:
 
+terminfo dumb
+
 load_env
 regexp --set 1:disk '(.*),.*' $root
 for dev in ($disk,gpt*); do

ci/Jenkinsfile

@@ -0,0 +1,74 @@
+pipeline {
+    parameters {
+        booleanParam 'CLEAN_BUILD'
+        string 'CUSTOM_TARGET'
+    }
+
+    options {
+        disableConcurrentBuilds()
+    }
+
+    agent {
+        kubernetes {
+            yamlFile 'ci/podTemplate.yaml'
+            yamlMergeStrategy merge()
+            workspaceVolume persistentVolumeClaimWorkspaceVolume(
+                claimName: 'buildroot-aimeeos'
+            )
+            defaultContainer 'build'
+        }
+    }
+
+    environment {
+        BR2_CCACHE_DIR = "${env.JENKINS_AGENT_WORKDIR}/br2-ccache"
+    }
+
+    stages {
+        stage('Clean') {
+            when {
+                expression {
+                    return params.CLEAN_BUILD
+                }
+            }
+            steps {
+                sh 'git clean -fdx'
+            }
+        }
+
+        stage('Prepare') {
+            steps {
+                container('jnlp') {
+                    sh 'if [ ! -d buildroot ]; then git clone https://gitlab.com/buildroot.org/buildroot.git -b 2025.05.x --depth 1; else git -C buildroot pull; fi'
+                }
+            }
+        }
+
+        stage('Build') {
+            steps {
+                sh 'make -C buildroot O="${PWD}"/_build BR2_EXTERNAL="${PWD}" aimeeos_qemu_aarch64_defconfig'
+                script {
+                    if (params.CUSTOM_TARGET) {
+                        sh "make -C _build '${CUSTOM_TARGET}'"
+                    }
+                }
+                sh 'make -C _build'
+            }
+            post {
+                success {
+                    dir('_build') {
+                        archiveArtifacts('.config')
+                    }
+                    dir('_build/images') {
+                        sh 'zstd -f firmware.img'
+                        sh 'zstd -f sdcard.img'
+                        archiveArtifacts([
+                            'firmware.img.zst',
+                            'rootfs.squashfs',
+                            'sdcard.img.zst',
+                        ].join(','))
+                    }
+                }
+            }
+        }
+    }
+}

ci/podTemplate.yaml

@@ -0,0 +1,19 @@
+spec:
+  containers:
+  - name: build
+    image: git.pyrocufflink.net/containerimages/buildroot
+    resources:
+      limits: &resources
+        cpu: 6
+        memory: 12Gi
+      requests: *resources
+    volumeMounts:
+    - mountPath: /etc/ssh/ssh_known_hosts
+      name: ssh-known-hosts
+      subPath: ssh_known_hosts
+  securityContext:
+    fsGroupChangePolicy: OnRootMismatch
+  volumes:
+  - name: ssh-known-hosts
+    configMap:
+      name: ssh-known-hosts

configs/aimeeos_qemu_aarch64_defconfig

@@ -0,0 +1,20 @@
+BR2_aarch64=y
+BR2_TOOLCHAIN_BUILDROOT_VENDOR="aimeeos"
+BR2_GLOBAL_PATCH_DIR="board/qemu/patches"
+BR2_DOWNLOAD_FORCE_CHECK_HASHES=y
+BR2_INIT_SYSTEMD=y
+BR2_ROOTFS_POST_IMAGE_SCRIPT="$(BR2_EXTERNAL_AIMEEOS_PATH)/board/qemu/post-image.sh"
+# BR2_INIT_SYSTEMD_POPULATE_TMPFILES is not set
+# BR2_TARGET_ENABLE_ROOT_LOGIN is not set
+# BR2_TARGET_GENERIC_GETTY is not set
+# BR2_TARGET_GENERIC_REMOUNT_ROOTFS_RW is not set
+BR2_LINUX_KERNEL=y
+BR2_LINUX_KERNEL_USE_CUSTOM_CONFIG=y
+BR2_LINUX_KERNEL_CUSTOM_CONFIG_FILE="board/qemu/aarch64-virt/linux.config"
+BR2_LINUX_KERNEL_CONFIG_FRAGMENT_FILES="$(BR2_EXTERNAL_AIMEEOS_PATH)/kernel/config"
+BR2_LINUX_KERNEL_NEEDS_HOST_OPENSSL=y
+# BR2_PACKAGE_BUSYBOX is not set
+# BR2_TARGET_ROOTFS_TAR is not set
+AIMEEOS=y
+AIMEEOS_DEFAULT_ROOTFLAGS="systemd.mask=serial-getty@ttyAMA0 systemd.debug_shell systemd.default_debug_tty=ttyAMA0"
+BR2_TARGET_GRUB2_BUILTIN_MODULES_EFI="boot configfile echo efi_gop fat gzio linux loadenv minicmd normal part_gpt probe regexp squash4 terminfo test zstd"

configs/aimeeos_rpi3_defconfig

@@ -23,7 +23,7 @@ BR2_PACKAGE_RPI_FIRMWARE_VARIANT_PI=y
 BR2_PACKAGE_RPI_FIRMWARE_CMDLINE_FILE="$(BR2_EXTERNAL_AIMEEOS_PATH)/board/raspberrypi3/cmdline.txt"
 BR2_PACKAGE_RPI_FIRMWARE_CONFIG_FILE="$(BR2_EXTERNAL_AIMEEOS_PATH)/board/raspberrypi3/config.txt"
 # BR2_TARGET_ROOTFS_TAR is not set
-BR2_TARGET_GRUB2_BUILTIN_MODULES_EFI="boot configfile echo efi_gop fat gzio linux loadenv minicmd normal part_gpt probe regexp squash4 test zstd"
+BR2_TARGET_GRUB2_BUILTIN_MODULES_EFI="boot configfile echo efi_gop fat gzio linux loadenv minicmd normal part_gpt probe regexp squash4 terminfo test zstd"
 BR2_TARGET_UBOOT_BOARD_DEFCONFIG="rpi_3_32b"
 BR2_PACKAGE_HOST_KMOD_XZ=y
 AIMEEOS=y

external.mk

@@ -3,11 +3,27 @@ define AIMEEOS_GRUB2_INSTALL_IMAGES_CMDS
 $(foreach tuple, $(GRUB2_TUPLES-y), \
 	$(INSTALL) -D -m 0644 $(BR2_EXTERNAL_AIMEEOS_PATH)/boot/grub2/grub.cfg $(GRUB2_CFG_$(tuple))
 )
+$(HOST_DIR)/bin/grub-editenv $(BINARIES_DIR)/efi-part/EFI/BOOT/grubenv set \
+	default=0 \
+	timeout=3 \
+	rootflags=$(AIMEEOS_DEFAULT_ROOTFLAGS)
 endef
 GRUB2_INSTALL_IMAGES_CMDS += $(AIMEEOS_GRUB2_INSTALL_IMAGES_CMDS)
 
+ifneq ($(BR2_LINUX_KERNEL_IMAGE_TARGET_CUSTOM),)
+AIMEEOS_KERNEL_FILENAME = $(BR2_LINUX_KERNEL_IMAGE_TARGET_CUSTOM)
+else ifeq ($(BR2_LINUX_KERNEL_IMAGE),y)
+AIMEEOS_KERNEL_FILENAME = Image
+else ifeq ($(BR2_LINUX_KERNEL_IMAGEZ),y)
+AIMEEOS_KERNEL_FILENAME = zImage
+else ifeq ($(BR2_LINUX_KERNEL_VMLINUX),y)
+AIMEEOS_KERNEL_FILENAME = vmlinux
+else
+$(error "Must define a Linux kernel target")
+endif
+
 # Generate the grub.cfg stub for the kernel embedded in rootfs.squashfs
 define AIMEEOS_GEN_GRUB_CFG
-$(BR2_EXTERNAL_AIMEEOS_PATH)/boot/grub2/gen-grub-cfg.sh
+$(BR2_EXTERNAL_AIMEEOS_PATH)/boot/grub2/gen-grub-cfg.sh $(AIMEEOS_KERNEL_FILENAME)
 endef
 LINUX_TARGET_FINALIZE_HOOKS += AIMEEOS_GEN_GRUB_CFG