1.. SPDX-License-Identifier: BSD-3-Clause 2 Copyright(c) 2018 ARM Corporation. 3 4Cross compile DPDK for ARM64 5============================ 6This chapter describes how to cross compile DPDK for ARM64 from x86 build hosts. 7 8.. note:: 9 10 Whilst it is recommended to natively build DPDK on ARM64 (just 11 like with x86), it is also possible to cross-build DPDK for ARM64. An 12 ARM64 cross compile GNU toolchain is used for this. 13 14Obtain the cross tool chain 15--------------------------- 16The latest cross compile tool chain can be downloaded from: 17https://developer.arm.com/open-source/gnu-toolchain/gnu-a/downloads. 18 19It is always recommended to check and get the latest compiler tool from the page and use 20it to generate better code. As of this writing 8.3-2019.03 is the newest, the following 21description is an example of this version. 22 23.. code-block:: console 24 25 wget https://developer.arm.com/-/media/Files/downloads/gnu-a/8.3-2019.03/binrel/gcc-arm-8.3-2019.03-x86_64-aarch64-linux-gnu.tar.xz 26 27Unzip and add into the PATH 28--------------------------- 29 30.. code-block:: console 31 32 tar -xvf gcc-arm-8.3-2019.03-x86_64-aarch64-linux-gnu.tar.xz 33 export PATH=$PATH:<cross_install_dir>/gcc-arm-8.3-2019.03-x86_64-aarch64-linux-gnu/bin 34 35.. note:: 36 37 For the host requirements and other info, refer to the release note section: https://releases.linaro.org/components/toolchain/binaries/ 38 39.. _arm_cross_build_getting_the_prerequisite_library: 40 41Getting the prerequisite library 42-------------------------------- 43 44NUMA is required by most modern machines, not needed for non-NUMA architectures. 45 46.. note:: 47 48 For compiling the NUMA lib, run libtool --version to ensure the libtool version >= 2.2, 49 otherwise the compilation will fail with errors. 50 51.. code-block:: console 52 53 git clone https://github.com/numactl/numactl.git 54 cd numactl 55 git checkout v2.0.13 -b v2.0.13 56 ./autogen.sh 57 autoconf -i 58 ./configure --host=aarch64-linux-gnu CC=aarch64-linux-gnu-gcc --prefix=<numa install dir> 59 make install 60 61The numa header files and lib file is generated in the include and lib folder respectively under <numa install dir>. 62 63.. _augment_the_cross_toolchain_with_numa_support: 64 65Augment the cross toolchain with NUMA support 66--------------------------------------------- 67 68.. note:: 69 70 This way is optional, an alternative is to use extra CFLAGS and LDFLAGS, depicted in :ref:`configure_and_cross_compile_dpdk_build` below. 71 72Copy the NUMA header files and lib to the cross compiler's directories: 73 74.. code-block:: console 75 76 cp <numa_install_dir>/include/numa*.h <cross_install_dir>/gcc-arm-8.3-2019.03-x86_64-aarch64-linux-gnu/aarch64-linux-gnu/libc/usr/include/ 77 cp <numa_install_dir>/lib/libnuma.a <cross_install_dir>/gcc-arm-8.3-2019.03-x86_64-aarch64-linux-gnu/lib/gcc/aarch64-linux-gnu/8.3.0/ 78 cp <numa_install_dir>/lib/libnuma.so <cross_install_dir>/gcc-arm-8.3-2019.03-x86_64-aarch64-linux-gnu/lib/gcc/aarch64-linux-gnu/8.3.0/ 79 80.. _configure_and_cross_compile_dpdk_build: 81 82Cross Compiling DPDK using Meson 83-------------------------------- 84 85Meson depends on pkgconfig to find the dependencies. 86The package ``pkg-config-aarch64-linux-gnu`` is required for aarch64. 87To install it in Ubuntu:: 88 89 sudo apt-get install pkg-config-aarch64-linux-gnu 90 91To cross-compile DPDK on a desired target machine we can use the following 92command:: 93 94 meson cross-build --cross-file <target_machine_configuration> 95 ninja -C cross-build 96 97For example if the target machine is arm64 we can use the following 98command:: 99 100 meson arm64-build --cross-file config/arm/arm64_armv8_linux_gcc 101 ninja -C arm64-build 102 103Configure and Cross Compile DPDK using Make 104------------------------------------------- 105To configure a build, choose one of the target configurations, like arm64-dpaa-linux-gcc and arm64-thunderx-linux-gcc. 106 107.. code-block:: console 108 109 make config T=arm64-armv8a-linux-gcc 110 111To cross-compile, without compiling the kernel modules, use the following command: 112 113.. code-block:: console 114 115 make -j CROSS=aarch64-linux-gnu- CONFIG_RTE_KNI_KMOD=n CONFIG_RTE_EAL_IGB_UIO=n 116 117To cross-compile, including the kernel modules, the kernel source tree needs to be specified by setting 118RTE_KERNELDIR: 119 120.. code-block:: console 121 122 make -j CROSS=aarch64-linux-gnu- RTE_KERNELDIR=<kernel_src_rootdir> CROSS_COMPILE=aarch64-linux-gnu- 123 124To compile for non-NUMA targets, without compiling the kernel modules, use the following command: 125 126.. code-block:: console 127 128 make -j CROSS=aarch64-linux-gnu- CONFIG_RTE_KNI_KMOD=n CONFIG_RTE_EAL_IGB_UIO=n CONFIG_RTE_LIBRTE_VHOST_NUMA=n CONFIG_RTE_EAL_NUMA_AWARE_HUGEPAGES=n 129 130.. note:: 131 132 1. EXTRA_CFLAGS and EXTRA_LDFLAGS should be added to include the NUMA headers and link the library respectively, 133 if the above step :ref:`augment_the_cross_toolchain_with_numa_support` was skipped therefore the toolchain was not 134 augmented with NUMA support. 135 136 2. "-isystem <numa_install_dir>/include" should be add to EXTRA_CFLAGS, otherwise the numa.h file will get a lot of compiling 137 errors of Werror=cast-qual, Werror=strict-prototypes and Werror=old-style-definition. 138 139 An example is given below: 140 141 .. code-block:: console 142 143 make -j CROSS=aarch64-linux-gnu- CONFIG_RTE_KNI_KMOD=n CONFIG_RTE_EAL_IGB_UIO=n EXTRA_CFLAGS="-isystem <numa_install_dir>/include" EXTRA_LDFLAGS="-L<numa_install_dir>/lib -lnuma" 144