/usr/powerpc64-linux-gnu/include/asm-generic/ is in linux-libc-dev-ppc64-cross 4.15.0-18.19cross1.
This file is owned by root:root, with mode 0o755.
..
/usr/powerpc64-linux-gnu/include/asm-generic/auxvec.h
/usr/powerpc64-linux-gnu/include/asm-generic/bitsperlong.h
/usr/powerpc64-linux-gnu/include/asm-generic/bpf_perf_event.h
/usr/powerpc64-linux-gnu/include/asm-generic/errno-base.h
/usr/powerpc64-linux-gnu/include/asm-generic/errno.h
/usr/powerpc64-linux-gnu/include/asm-generic/fcntl.h
/usr/powerpc64-linux-gnu/include/asm-generic/hugetlb_encode.h
/usr/powerpc64-linux-gnu/include/asm-generic/int-l64.h
/usr/powerpc64-linux-gnu/include/asm-generic/int-ll64.h
/usr/powerpc64-linux-gnu/include/asm-generic/ioctl.h
/usr/powerpc64-linux-gnu/include/asm-generic/ioctls.h
/usr/powerpc64-linux-gnu/include/asm-generic/ipcbuf.h
/usr/powerpc64-linux-gnu/include/asm-generic/kvm_para.h
/usr/powerpc64-linux-gnu/include/asm-generic/mman-common.h
/usr/powerpc64-linux-gnu/include/asm-generic/mman.h
/usr/powerpc64-linux-gnu/include/asm-generic/msgbuf.h
/usr/powerpc64-linux-gnu/include/asm-generic/param.h
/usr/powerpc64-linux-gnu/include/asm-generic/poll.h
/usr/powerpc64-linux-gnu/include/asm-generic/posix_types.h
/usr/powerpc64-linux-gnu/include/asm-generic/resource.h
/usr/powerpc64-linux-gnu/include/asm-generic/sembuf.h
/usr/powerpc64-linux-gnu/include/asm-generic/setup.h
/usr/powerpc64-linux-gnu/include/asm-generic/shmbuf.h
/usr/powerpc64-linux-gnu/include/asm-generic/shmparam.h
/usr/powerpc64-linux-gnu/include/asm-generic/siginfo.h
/usr/powerpc64-linux-gnu/include/asm-generic/signal-defs.h
/usr/powerpc64-linux-gnu/include/asm-generic/signal.h
/usr/powerpc64-linux-gnu/include/asm-generic/socket.h
/usr/powerpc64-linux-gnu/include/asm-generic/sockios.h
/usr/powerpc64-linux-gnu/include/asm-generic/stat.h
/usr/powerpc64-linux-gnu/include/asm-generic/statfs.h
/usr/powerpc64-linux-gnu/include/asm-generic/swab.h
/usr/powerpc64-linux-gnu/include/asm-generic/termbits.h
/usr/powerpc64-linux-gnu/include/asm-generic/termios.h
/usr/powerpc64-linux-gnu/include/asm-generic/types.h
/usr/powerpc64-linux-gnu/include/asm-generic/ucontext.h
/usr/powerpc64-linux-gnu/include/asm-generic/unistd.h