Installing openwrt on x86-64 - Riseup
we.riseup.net › wikis › 193527Create your own partitions and filesystems of larger sizes, then untar the openwrt-x86-64-rootfs.tar.gz tarball in the root partition and put the openwrt-x86-64-vmlinuz kernel in the /boot parition and then install and configure the bootloader to point at the kernel and new partition as root.