reproduce (this is a W=1 build):
        # https://github.com/sean-jc/linux/commit/eb37cd848b9a267681c225f1a6a0176cfe7c088c
        git remote add sean-jc https://github.com/sean-jc/linux
        git fetch --no-tags sean-jc x86/virt_enable_less_sucky
        git checkout eb37cd848b9a267681c225f1a6a0176cfe7c088c
        # save the config file
        mkdir build_dir && cp config build_dir/.config
        make W=1 O=build_dir ARCH=i386 olddefconfig
        make W=1 O=build_dir ARCH=i386 SHELL=/bin/bash arch/x86/events/intel/