From: Phil Yang <phil.y...@arm.com>
Add cross-compiling guidance for 32-bit aarch32 DPDK on aarch64 host.
Signed-off-by: Phil Yang <phil.y...@arm.com>
---
.../linux_gsg/cross_build_dpdk_for_arm64.rst | 34 +++++++++++++------
1 file changed, 24 insertions(+), 10 deletions(-)
diff --git a/doc/guides/linux_gsg/cross_build_dpdk_for_arm64.rst
b/doc/guides/linux_gsg/cross_build_dpdk_for_arm64.rst
index 8a1d0e88b..1f2ff751d 100644
--- a/doc/guides/linux_gsg/cross_build_dpdk_for_arm64.rst
+++ b/doc/guides/linux_gsg/cross_build_dpdk_for_arm64.rst
@@ -1,15 +1,16 @@
.. SPDX-License-Identifier: BSD-3-Clause
Copyright(c) 2018 ARM Corporation.
-Cross compile DPDK for ARM64
-============================
-This chapter describes how to cross compile DPDK for ARM64 from x86 build
hosts.
+Cross compile DPDK for aarch64 and aarch32
+==========================================
+This chapter describes how to cross compile DPDK for aarch64 from x86 build
hosts and compile
+32-bit aarch32 DPDK from aarch64 build hosts.
.. note::
- Whilst it is recommended to natively build DPDK on ARM64 (just
- like with x86), it is also possible to cross-build DPDK for ARM64. An
- ARM64 cross compile GNU toolchain is used for this.
+ Whilst it is recommended to natively build DPDK on aarch64 (just
+ like with x86), it is also possible to cross-build DPDK for aarch64.
+ An aarch64 cross compile GNU toolchain is used for this.
Obtain the cross tool chain
---------------------------
@@ -88,14 +89,27 @@ To install it in Ubuntu::
sudo apt-get install pkg-config-aarch64-linux-gnu
-To cross-compile DPDK on a desired target machine we can use the following
-command::
+.. note::
+
+ Some aarch64 platforms support EL0 aarch32 mode, which means the 32-bit
aarch32 applications
+ can run on aarch64. The armhf architecture toolchain
``gcc-arm-linux-gnueabihf`` is required
+ for aarch32 on aarch64. To install it in Ubuntu::
+
+ sudo dpkg --add-architecture armhf
+ sudo apt-get update
+ sudo apt-get install -y gcc-arm-linux-gnueabihf libc6:armhf binutils
+
+To cross-compile DPDK on a desired target machine use the following command::
meson cross-build --cross-file <target_machine_configuration>
ninja -C cross-build
-For example if the target machine is arm64 we can use the following
-command::
+For example if the target machine is aarch64 use the following command::
meson arm64-build --cross-file config/arm/arm64_armv8_linux_gcc
ninja -C arm64-build
+
+If the target machine is aarch32 use the following command::
+
+ meson arm32-build --cross-file config/arm/arm32_armv8a_linux_gcc
+ ninja -C arm32-build
--
2.20.1
