QEMU command to boot with host rootfs

qemu_host_rootfs.sh

KERNEL_IMG=~/sources/linux/linux/arch/x86/boot/bzImage

kvm \
    -kernel $KERNEL_IMG \
    -smp $(nproc) \
    -m 2G \
    -nographic \
    -fsdev local,security_model=none,id=fsdev-root,path=/,readonly \
    -device virtio-9p-pci,id=fs-root,fsdev=fsdev-root,mount_tag=/dev/root \
    -serial mon:stdio \
    -append "console=ttyS0 root=/dev/root ro rootflags=trans=virtio,version=9p2000.u rootfstype=9p lsm= init=/bin/bash"