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From: Phil Yang <phil.yang@arm.com>
To: dev@dpdk.org
Cc: thomas@monjalon.net, david.marchand@redhat.com,
	jerinj@marvell.com, Honnappa.Nagarahalli@arm.com,
	gavin.hu@arm.com, joyce.kong@arm.com, nd@arm.com,
	stable@dpdk.org
Subject: [dpdk-stable] [PATCH 2/2] doc: add aarch32 build guidance
Date: Mon, 11 Nov 2019 18:34:21 +0800
Message-ID: <1573468461-25972-2-git-send-email-phil.yang@arm.com> (raw)
In-Reply-To: <1573468461-25972-1-git-send-email-phil.yang@arm.com>

Add a guidance for aarch64 natively build 32-bit aarch32 DPDK.

Cc: stable@dpdk.org

Signed-off-by: Phil Yang <phil.yang@arm.com>
Reviewed-by: Gavin Hu <gavin.hu@arm.com>
Tested-by: Joyce Kong <joyce.kong@arm.com>

---
 .../linux_gsg/cross_build_dpdk_for_arm64.rst       | 36 ++++++++++++++++++----
 1 file changed, 30 insertions(+), 6 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 e799b0b..409d444 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 +1,15 @@
 ..  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 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
 ---------------------------
@@ -133,3 +133,27 @@ command::
 
 	meson arm64-build --cross-file config/arm/arm64_armv8_linux_gcc
 	ninja -C arm64-build
+
+Compiling DPDK for aarch32/armv7 on aarch64 host
+------------------------------------------
+
+Some aarch64 platforms support EL0 aarch32 mode, so the 32-bit aarch32
+applications and the legacy 32-bit armv7 applications can run in this mode.
+With the GNU C compiler for the armhf architecture toolchain
+gcc-arm-linux-gnueabihf, it can generate aarch32 binary on aarch64 natively.
+
+For Example, in 64-bit Debian, we can use the following command to build 32-bit armv7 DPDK on aarch64 natively:
+
+Install cross compile toolchain for the armhf architecure.
+command::
+
+	dpkg --add-architecture armhf
+	apt-get update
+	apt-get install -y gcc gcc-arm-linux-gnueabihf libc6:armhf make binutils
+
+Build DPDK arm-armv7a-linuxapp-gcc executables.
+command::
+
+	cd <dpdk_folder>
+	make config CROSS=arm-linux-gnueabihf- T=arm-armv7a-linuxapp-gcc
+	make -j CROSS=arm-linux-gnueabihf- T=arm-armv7a-linuxapp-gcc RTE_DEVEL_BUILD=n
-- 
2.7.4


  reply index

Thread overview: 16+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2019-11-11 10:34 [dpdk-stable] [PATCH 1/2] mk: fix unsupported flag error on armhf architercture Phil Yang
2019-11-11 10:34 ` Phil Yang [this message]
2020-05-24 21:21   ` [dpdk-stable] [dpdk-dev] [PATCH 2/2] doc: add aarch32 build guidance Thomas Monjalon
2020-05-25  3:20     ` Phil Yang
2020-05-27  8:28   ` Ruifeng Wang
2020-07-02  5:37     ` Phil Yang
2020-07-02  8:01       ` Jerin Jacob
2019-11-11 10:47 ` [dpdk-stable] [dpdk-dev] [PATCH 1/2] mk: fix unsupported flag error on armhf architercture Bruce Richardson
2019-11-12  5:25   ` Phil Yang (Arm Technology China)
2019-11-12  6:03     ` Thomas Monjalon
2019-11-12  6:40       ` Phil Yang (Arm Technology China)
2019-11-26 17:01         ` Thomas Monjalon
2019-11-27  8:09           ` Phil Yang (Arm Technology China)
2019-11-27  9:29             ` Bruce Richardson
2019-11-27 10:00               ` Phil Yang (Arm Technology China)
2019-11-27 10:32                 ` Thomas Monjalon

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