resources: Update arm image to ubuntu 22.04 (#32)

- Update building image using packer.
- Add scripts and exot events to the image.

src/arm-ubuntu/arm-ubuntu.pkr.hcl

@@ -0,0 +1,94 @@
+packer {
+  required_plugins {
+    qemu = {
+      source  = "github.com/hashicorp/qemu"
+      version = "~> 1"
+    }
+  }
+}
+
+variable "image_name" {
+  type    = string
+  default = "arm-ubuntu"
+}
+
+variable "ssh_password" {
+  type    = string
+  default = "12345"
+}
+
+variable "ssh_username" {
+  type    = string
+  default = "gem5"
+}
+
+source "qemu" "initialize" {
+  boot_command     = [
+                      "c<wait>",
+                      "linux /casper/vmlinuz autoinstall ds=nocloud-net\\;s=http://{{.HTTPIP}}:{{.HTTPPort}}/ --- ",
+                      "<enter><wait>",
+                      "initrd /casper/initrd",
+                      "<enter><wait>",
+                      "boot",
+                      "<enter>",
+                      "<wait>"
+                      ]
+  cpus             = "4"
+  disk_size        = "4600"
+  format           = "raw"
+  headless         = "true"
+  http_directory   = "http"
+  iso_checksum     = "sha256:c209ab013280d3cd26a344def60b7b19fbb427de904ea285057d94ca6ac82dd5"
+  iso_urls         = ["https://old-releases.ubuntu.com/releases/jammy/ubuntu-22.04-live-server-arm64.iso"]
+  memory           = "8192"
+  output_directory = "disk-image"
+  qemu_binary      = "/usr/bin/qemu-system-aarch64"
+  qemuargs         = [  ["-boot", "order=dc"],
+                        ["-bios", "./files/flash0.img"],
+                        ["-cpu", "host"],
+                        ["-enable-kvm"],
+                        ["-machine", "virt"],
+                        ["-machine", "gic-version=3"],
+                        ["-vga", "virtio"],
+                        ["-device","virtio-gpu-pci"],
+                        ["-device", "qemu-xhci"],
+                        ["-device","usb-kbd"],
+
+                      ]
+  shutdown_command = "echo '${var.ssh_password}'|sudo -S shutdown -P now"
+  ssh_password     = "${var.ssh_password}"
+  ssh_username     = "${var.ssh_username}"
+  ssh_wait_timeout = "60m"
+  vm_name          = "${var.image_name}"
+  ssh_handshake_attempts = "1000"
+}
+
+build {
+  sources = ["source.qemu.initialize"]
+
+  provisioner "file" {
+    destination = "/home/gem5/"
+    source      = "files/exit.sh"
+  }
+
+  provisioner "file" {
+    destination = "/home/gem5/"
+    source      = "files/gem5_init.sh"
+  }
+
+  provisioner "file" {
+    destination = "/home/gem5/"
+    source      = "files/after_boot.sh"
+  }
+
+  provisioner "file" {
+    destination = "/home/gem5/"
+    source      = "files/serial-getty@.service"
+  }
+
+  provisioner "shell" {
+    execute_command = "echo '${var.ssh_password}' | {{ .Vars }} sudo -E -S bash '{{ .Path }}'"
+    scripts         = ["scripts/post-installation.sh"]
+  }
+
+}

src/arm-ubuntu/build.sh

@@ -0,0 +1,13 @@
+PACKER_VERSION="1.10.0"
+
+if [ ! -f ./packer ]; then
+    wget https://releases.hashicorp.com/packer/${PACKER_VERSION}/packer_${PACKER_VERSION}_linux_arm64.zip;
+    unzip packer_${PACKER_VERSION}_linux_arm64.zip;
+    rm packer_${PACKER_VERSION}_linux_arm64.zip;
+fi
+
+# Install the needed plugins
+./packer init arm-ubuntu.pkr.hcl
+
+# Build the image
+./packer build arm-ubuntu.pkr.hcl

src/arm-ubuntu/files/after_boot.sh

@@ -0,0 +1,57 @@
+#!/bin/bash
+
+# Copyright (c) 2022,2024 The University of California.
+# Copyright (c) 2021 The University of Texas at Austin.
+# SPDX-License-Identifier: BSD 3-Clause
+
+# This file is executed at the end of the bashrc for the gem5 user.
+# The script checks to see if we should run in interactive mode or not.
+# If we are in interactive mode, the script will drop to a shell.
+# If we are not in interactive mode, the script will check if we should
+# run a script from the gem5-bridge. If so, it will run the script and
+# exit. If there is no script and we are not in interactive mode, it will
+# exit. This last option is used for testing purposes.
+
+# gem5-bridge exit signifying that after_boot.sh is running
+printf "In after_boot.sh...\n"
+gem5-bridge exit # TODO: Make this a specialized event.
+
+# Read /proc/cmdline and parse options
+
+cmdline=$(cat /proc/cmdline)
+interactive=false
+IGNORE_M5=0
+if [[ $cmdline == *"interactive"* ]]; then
+    interactive=true
+fi
+
+printf "Interactive mode: $interactive\n"
+
+if [[ $interactive == true ]]; then
+    printf "Interactive mode enabled, dropping to shell."
+    /bin/bash
+else
+    # Try to read the file from the host when running with gem5
+    if ! [ -z $IGNORE_M5 ]; then
+        printf "Starting gem5 init... trying to read run script file via readfile.\n"
+        if ! gem5-bridge readfile > /tmp/script; then
+            printf "Failed to run gem5-bridge readfile, exiting!\n"
+            rm -f /tmp/script
+            # If we can't read the script exit the simulation. If we cannot exit the
+            # simulation, this probably means that we are running in QEMU. So, ignore
+            # future calls to gem5-bridge.
+            if ! gem5-bridge exit; then
+                # Useful for booting the disk image in (e.g.,) qemu for debugging
+                printf "gem5-bridge exit failed, dropping to shell.\n"
+                IGNORE_M5=1 /bin/bash
+            fi
+        else
+            printf "Running script from gem5-bridge stored in /tmp/script\n"
+            chmod 755 /tmp/script
+            /tmp/script
+            printf "Done running script from gem5-bridge, exiting.\n"
+            rm -f /tmp/script
+            gem5-bridge exit
+        fi
+    fi
+fi

src/arm-ubuntu/files/exit.sh

@@ -0,0 +1,6 @@
+#!/bin/sh
+
+# Copyright (c) 2020 The Regents of the University of California.
+# SPDX-License-Identifier: BSD 3-Clause
+
+m5 exit