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 19Following is the step to get the version 8.2, latest one at the time of this writing. 20 21.. code-block:: console 22 23 wget https://developer.arm.com/-/media/Files/downloads/gnu-a/8.2-2019.01/gcc-arm-8.2-2019.01-x86_64-aarch64-linux-gnu.tar.xz 24 25Unzip and add into the PATH 26--------------------------- 27 28.. code-block:: console 29 30 tar -xvf gcc-arm-8.2-2019.01-x86_64-aarch64-linux-gnu.tar.xz 31 export PATH=$PATH:<cross_install_dir>/gcc-arm-8.2-2019.01-x86_64-aarch64-linux-gnu/bin 32 33.. note:: 34 35 For the host requirements and other info, refer to the release note section: https://releases.linaro.org/components/toolchain/binaries/ 36 37Getting the prerequisite library 38-------------------------------- 39 40NUMA is required by most modern machines, not needed for non-NUMA architectures. 41 42.. note:: 43 44 For compiling the NUMA lib, run libtool --version to ensure the libtool version >= 2.2, 45 otherwise the compilation will fail with errors. 46 47.. code-block:: console 48 49 git clone https://github.com/numactl/numactl.git 50 cd numactl 51 git checkout v2.0.11 -b v2.0.11 52 ./autogen.sh 53 autoconf -i 54 ./configure --host=aarch64-linux-gnu CC=aarch64-linux-gnu-gcc --prefix=<numa install dir> 55 make install 56 57The numa header files and lib file is generated in the include and lib folder respectively under <numa install dir>. 58 59.. _augment_the_cross_toolchain_with_numa_support: 60 61Augment the cross toolchain with NUMA support 62--------------------------------------------- 63 64.. note:: 65 66 This way is optional, an alternative is to use extra CFLAGS and LDFLAGS, depicted in :ref:`configure_and_cross_compile_dpdk_build` below. 67 68Copy the NUMA header files and lib to the cross compiler's directories: 69 70.. code-block:: console 71 72 cp <numa_install_dir>/include/numa*.h <cross_install_dir>/gcc-arm-8.2-2019.01-x86_64-aarch64-linux-gnu/bin/../aarch64-linux-gnu/libc/usr/include/ 73 cp <numa_install_dir>/lib/libnuma.a <cross_install_dir>/gcc-arm-8.2-2019.01-x86_64-aarch64-linux-gnu/lib/gcc/aarch64-linux-gnu/8.2/ 74 75.. _configure_and_cross_compile_dpdk_build: 76 77Configure and cross compile DPDK Build 78-------------------------------------- 79To configure a build, choose one of the target configurations, like arm64-dpaa2-linux-gcc and arm64-thunderx-linux-gcc. 80 81.. code-block:: console 82 83 make config T=arm64-armv8a-linux-gcc 84 85To cross-compile, without compiling the kernel modules, use the following command: 86 87.. code-block:: console 88 89 make -j CROSS=aarch64-linux-gnu- CONFIG_RTE_KNI_KMOD=n CONFIG_RTE_EAL_IGB_UIO=n 90 91To cross-compile, including the kernel modules, the kernel source tree needs to be specified by setting 92RTE_KERNELDIR: 93 94.. code-block:: console 95 96 make -j CROSS=aarch64-linux-gnu- RTE_KERNELDIR=<kernel_src_rootdir> CROSS_COMPILE=aarch64-linux-gnu- 97 98To compile for non-NUMA targets, without compiling the kernel modules, use the following command: 99 100.. code-block:: console 101 102 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 103 104.. note:: 105 106 1. EXTRA_CFLAGS and EXTRA_LDFLAGS should be added to include the NUMA headers and link the library respectively, 107 if the above step :ref:`augment_the_cross_toolchain_with_numa_support` was skipped therefore the toolchain was not 108 augmented with NUMA support. 109 110 2. "-isystem <numa_install_dir>/include" should be add to EXTRA_CFLAGS, otherwise the numa.h file will get a lot of compiling 111 errors of Werror=cast-qual, Werror=strict-prototypes and Werror=old-style-definition. 112 113 An example is given below: 114 115 .. code-block:: console 116 117 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" 118 119Meson Cross Compiling DPDK 120-------------------------- 121 122To cross-compile DPDK on a desired target machine we can use the following 123command:: 124 125 meson cross-build --cross-file <target_machine_configuration> 126 ninja -C cross-build 127 128For example if the target machine is arm64 we can use the following 129command:: 130 131 meson arm64-build --cross-file config/arm/arm64_armv8_linux_gcc 132 ninja -C arm64-build 133