resources: add scripts to make and extract arm kernel

src/ubuntu-generic-diskimages/files/arm/gem5_init.sh

@@ -15,6 +15,25 @@ mount -t sysfs /sys /sys
 cmdline=$(cat /proc/cmdline)
 no_systemd=false
 
+# Load gem5_bridge driver
+## Default parameters (ARM64)
+gem5_bridge_baseaddr=0x10010000
+gem5_bridge_rangesize=0x10000
+## Try to read overloads from kernel arguments
+if [[ $cmdline =~ gem5_bridge_baseaddr=([[:alnum:]]+) ]]; then
+    gem5_bridge_baseaddr=${BASH_REMATCH[1]}
+fi
+if [[ $cmdline =~ gem5_bridge_rangesize=([[:alnum:]]+) ]]; then
+    gem5_bridge_rangesize=${BASH_REMATCH[1]}
+fi
+## Insert driver
+modprobe gem5_bridge \
+    gem5_bridge_baseaddr=$gem5_bridge_baseaddr \
+    gem5_bridge_rangesize=$gem5_bridge_rangesize
+
+# see if this modprode fails or not
+# print warning if it fails, gem5-bridge module is not going to work, you will need sudo for running exit events
+
 # gem5-bridge exit signifying that kernel is booted
 # This will cause the simulation to exit. Note that this will
 # cause qemu to fail.

src/ubuntu-generic-diskimages/http/arm-24-04/user-data

@@ -62,7 +62,7 @@ autoinstall:
       type: format
       id: format-0
     - device: disk-vda
-      size: 4257218560
+      size: 50726691840
       wipe: superblock
       flag: ''
       number: 2

src/ubuntu-generic-diskimages/packer-scripts/arm-ubuntu.pkr.hcl

@@ -92,7 +92,7 @@ source "qemu" "initialize" {
                       "<wait>"
                       ]
   cpus             = "4"
-  disk_size        = "4600"
+  disk_size        = "52000"
   format           = "raw"
   headless         = "true"
   http_directory   = local.iso_data[var.ubuntu_version].http_directory
@@ -139,4 +139,9 @@ build {
     environment_vars = ["ISA=arm64"]
     expect_disconnect = true
   }
+  provisioner "file" {
+    source      = "/home/gem5/my-arm-kernel/linux-6.8.0/vmlinux"
+    destination = "./arm-disk-image-24-04/vmlinux"
+    direction   = "download"
+  }
 }

src/ubuntu-generic-diskimages/scripts/post-installation.sh

@@ -18,12 +18,31 @@ apt-get install -y build-essential
 echo "Installing serial service for autologin after systemd"
 mv /home/gem5/[email protected] /lib/systemd/system/
 
-# Make sure the headers are installed to extract the kernel that DKMS
-# packages will be built against.
-sudo apt -y install "linux-headers-$(uname -r)" "linux-modules-extra-$(uname -r)"
+apt-get update
+apt-get install -y fakeroot build-essential crash kexec-tools makedumpfile kernel-wedge
+# Fixing the sources.list file to include deb-src: https://askubuntu.com/questions/1512042/ubuntu-24-04-getting-error-you-must-put-some-deb-src-uris-in-your-sources-list
+sed -i 's/^Types: deb$/Types: deb deb-src/' /etc/apt/sources.list.d/ubuntu.sources
+
+apt update
+
+apt-get -y build-dep linux
+apt-get -y install git-core libncurses5 libncurses5-dev libelf-dev asciidoc binutils-dev
+apt-get -y install libssl-dev
+apt -y install flex bison
+apt -y install zstd
+
+mkdir my-arm-kernel
+cd my-arm-kernel
+apt source linux-image-unsigned-$(uname -r)
+cd linux-6.8.0
+cp /boot/config-$(uname -r) .config
+make -j$(nproc) vmlinux
 
-echo "Extracting linux kernel $(uname -r) to /home/gem5/vmlinux-x86-ubuntu"
-sudo bash -c "/usr/src/linux-headers-$(uname -r)/scripts/extract-vmlinux /boot/vmlinuz-$(uname -r) > /home/gem5/vmlinux-x86-ubuntu"
+chmod +x ./debian/scripts/sign-module
+make -j$(nproc) modules
+make -j modules_install
+
+update-initramfs -u -k 6.8.12
 
 echo "Installing the gem5 init script in /sbin"
 mv /home/gem5/gem5_init.sh /sbin
@@ -47,21 +66,29 @@ if [ -z "$ISA" ]; then
 fi
 
 # Just get the files we need
-git clone https://github.com/gem5/gem5.git --depth=1 --filter=blob:none --no-checkout --sparse --single-branch --branch=stable
+git clone https://github.com/nkrim/gem5.git --depth=1 --filter=blob:none --no-checkout --sparse --single-branch --branch=gem5-bridge
 pushd gem5
 # Checkout just the files we need
 git sparse-checkout add util/m5
+git sparse-checkout add util/gem5_bridge
 git sparse-checkout add include
 git checkout
 # Install the headers globally so that other benchmarks can use them
-cp -r include/gem5 /usr/local/include/\
+cp -r include/gem5 /usr/local/include/
 
 # Build the library and binary
 pushd util/m5
 scons build/${ISA}/out/m5
 cp build/${ISA}/out/m5 /usr/local/bin/
 cp build/${ISA}/out/libm5.a /usr/local/lib/
 popd   # util/m5
+
+# Build and insert the gem5-bridge driver
+pushd util/gem5_bridge
+make build install
+depmod --quick
+popd
+
 popd   # gem5
 
 # rename the m5 binary to gem5-bridge