reproduce (this is a W=1 build):
        # https://github.com/sean-jc/linux/commit/8a7add4d5d370361f93bd73f26aa92f198250ce5
        git remote add sean-jc https://github.com/sean-jc/linux
        git fetch --no-tags sean-jc vmx/sgx2_pferr_intercept
        git checkout 8a7add4d5d370361f93bd73f26aa92f198250ce5

        # 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/kvm/