Documentation/bpf/s390.rst

9 year 1964. They are supported by the Linux kernel under the name "s390". This
12 2. One-time setup
27     --variant=minbase \
28     --include=sudo \
30     ./s390-toolchain
31   sudo mount --rbind /dev ./s390-toolchain/dev
32   sudo mount --rbind /proc ./s390-toolchain/proc
33   sudo mount --rbind /sys ./s390-toolchain/sys
34   sudo chroot ./s390-toolchain
38   sudo dpkg --add-architecture s390x
39   sudo apt-get update
40   sudo apt-get install \
49     g++-s390x-linux-gnu \
50     gcc-s390x-linux-gnu \
51     gdb-multiarch \
55     qemu-system-misc \
56     qemu-utils \
58     libcap-dev:s390x \
59     libelf-dev:s390x \
60     libncurses-dev
64   git clone https://github.com/llvm/llvm-project.git
65   ln -s ../../clang llvm-project/llvm/tools/
66   mkdir llvm-project-build
67   cd llvm-project-build
69     -DLLVM_TARGETS_TO_BUILD=BPF \
70     -DCMAKE_BUILD_TYPE=Release \
71     -DCMAKE_INSTALL_PREFIX=/opt/clang-bpf \
72     ../llvm-project/llvm
75   export PATH=/opt/clang-bpf/bin:$PATH
79   qemu-img create -f raw ./s390.img 1G
80   sudo losetup -f ./s390.img
85     --foreign \
86     --arch=s390x \
87     --variant=minbase \
88     --include=" \
90       iputils-ping, \
91       isc-dhcp-client, \
100   sudo losetup -d /dev/loopX
119   make ARCH=s390 CROSS_COMPILE=s390x-linux-gnu- menuconfig
120   make ARCH=s390 CROSS_COMPILE=s390x-linux-gnu- bzImage modules scripts_gdb
121   make ARCH=s390 CROSS_COMPILE=s390x-linux-gnu- \
122     -C tools/testing/selftests \
132   qemu-system-s390x \
133     -cpu max,zpci=on \
134     -smp 2 \
135     -m 4G \
136     -kernel linux/arch/s390/boot/compressed/vmlinux \
137     -drive file=./s390.img,if=virtio,format=raw \
138     -nographic \
139     -append 'root=/dev/vda rw console=ttyS1' \
140     -virtfs local,path=./linux,security_model=none,mount_tag=linux \
141     -object rng-random,filename=/dev/urandom,id=rng0 \
142     -device virtio-rng-ccw,rng=rng0 \
143     -netdev user,id=net0 \
144     -device virtio-net-ccw,netdev=net0
146 When using this on a real IBM Z, ``-enable-kvm`` may be added for better
150   /debootstrap/debootstrap --second-stage
155   mkdir -p /linux
156   mount -t 9p linux /linux
157   mount -t proc proc /proc
158   mount -t sysfs sys /sys
162   cd /linux/tools/testing/selftests/kselftest_install
167   cd /linux/tools/testing/selftests/bpf
174 by passing ``-s`` to QEMU.
183   gdb-multiarch -ex 'target remote localhost:1234' ./vmlinux
199 - `Debootstrap <https://wiki.debian.org/EmDebian/CrossDebootstrap>`_
200 - `Multiarch <https://wiki.debian.org/Multiarch/HOWTO>`_
201 - `Building LLVM <https://llvm.org/docs/CMake.html>`_
202 - `Cross-compiling the kernel <https://wiki.gentoo.org/wiki/Embedded_Handbook/General/Cross-compili…
203 - `QEMU s390x Guest Support <https://wiki.qemu.org/Documentation/Platforms/S390X>`_
204 - `Plan 9 folder sharing over Virtio <https://wiki.qemu.org/Documentation/9psetup>`_
205 - `Using GDB with QEMU <https://wiki.osdev.org/Kernel_Debugging#Use_GDB_with_QEMU>`_