reproduce:
        # https://github.com/ls-zhu/linux/commit/974a675bdb73fc3b07c7f05322792e7437185d38
        git remote add ls-zhu https://github.com/ls-zhu/linux
        git fetch --no-tags ls-zhu v6.7-rc6-tdx
        git checkout 974a675bdb73fc3b07c7f05322792e7437185d38
        make W=1 O=/tmp/kselftest headers
        make W=1 O=/tmp/kselftest -C tools/testing/selftests
        make W=1 O=/tmp/kselftest -C tools/testing/selftests/bpf