Install Arch in QEMU and run KTSAN

qemucheatsheet

https://medium.com/@clem.boin/creating-a-minimal-kernel-development-setup-using-qemu-and-archlinux-987896954d84

# Install Arch system
qemu-image -f qcow2 kernel-dev-archlinux.img 4G
wget http://mirrors.edge.kernel.org/archlinux/iso/2018.12.01/archlinux-2018.12.01-x86_64.iso
# Note that ping does not work here
qemu-system-x86_64 -cdrom archlinux-2018.12.01-x86_64.iso -boot order=d -drive file=kernel-dev-archlinux.img,format=qcow2 -m 2G -enable-kvm -cpu host -smp 8 -net user,hostfwd=tcp::10022-:22 -net nic



# Run Arch system
qemu-system-x86_64 -hda wheezy-dirty.img -m 20G -smp 4 -net user,hostfwd=tcp::10022-:22 -net nic -nographic -kernel arch/x86/boot/bzImage -append "console=ttyS0 root=/dev/sda debug earlyprintk=serial slub_debug=QUZ" -enable-kvm -pidfile vm_pid


# TOREAD
https://blog.fpmurphy.com/2013/08/boot-linux-without-an-initramfs-2.html
http://nickdesaulniers.github.io/blog/2018/10/24/booting-a-custom-linux-kernel-in-qemu-and-debugging-it-with-gdb/
https://www.collabora.com/news-and-blog/blog/2017/01/16/setting-up-qemu-kvm-for-kernel-development/
https://medium.com/@clem.boin/creating-a-minimal-kernel-development-setup-using-qemu-and-archlinux-987896954d84
https://github.com/google/ktsan/wiki
https://wiki.archlinux.org/index.php/User-mode_Linux#Build_rootfs_image

# TOREAD 2
https://en.wikibooks.org/wiki/QEMU/Devices/Storage



# -initrd /boot/initramfs-linux.img
qemu-system-x86_64 -kernel arch/x86_64/boot/bzImage -nographic -append "console=ttyS0 root=/dev/sda rw debug earlyprintk=serial slub_debug=QUZ" -enable-kvm -cpu host -smp 8 -drive file=~/tmp/qemu-arch/rootfs.img,index=0 -net user,hostfwd=tcp::10022-:22 -net nic



# create rootfs

fallocate -l 8GiB rootfs.img
mkfs.ext4 -F rootfs.img
sudo mount -o loop rootfs.img mnt
sudo mkdir -p mnt/var/lib/pacman
sudo pacstrap mnt base



# build kernel
make defconfig
make kvmconfig
# Edit .config to set CONFIG_KTSAN=y
# Edit .config to unset CONFIG_SLUB and set CONFIG_SLAB=y
# Edit .config to set CONFIG_DEBUG_INFO=y
# ./scripts/config -e DEBUG_INFO -e GDB_SCRIPTS
make oldconfig
make -j8 LOCALVERSION=-tsan


# mount qcow2 disk
sudo modprobe nbd max_part=8
sudo qemu-nbd --connect=/dev/nbd0 rootfs.img
mount /dev/nbd0 mnt
sudo qemu-nbd --disconnect /dev/nbd0