[dpdk-dev] [PATCH v9 5/5] doc: add aarch32 build guidance

[Juraj Linkeš]

> -----Original Message-----
> From: Aaron Conole <aconole at redhat.com>
> Sent: Friday, September 11, 2020 3:20 PM
> To: Juraj Linkeš <juraj.linkes at pantheon.tech>
> Cc: thomas at monjalon.net; david.marchand at redhat.com;
> maicolgabriel at hotmail.com; dev at dpdk.org; Phil Yang <phil.yang at arm.com>
> Subject: Re: [PATCH v9 5/5] doc: add aarch32 build guidance
> 
> Juraj Linkeš <juraj.linkes at pantheon.tech> writes:
> 
> > From: Phil Yang <phil.yang at arm.com>
> >
> > Add cross-compiling guidance for 32-bit aarch32 DPDK on aarch64 host.
> >
> > Change-Id: Ib4281defa37ed4d08e1c3210c94fb7ce73b36449
> > Signed-off-by: Phil Yang <phil.yang at arm.com>
> > ---
> 
> I think Change-Id is not a tag that is used in DPDK.  Otherwise, this looks good to
> me.
> 
> Consider the series ACK with 'Change-Id' removed.
> 

Great, I'll resubmit.

> >  .../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 c5875a6d5..fd0405d6d 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
> >  ---------------------------
> > @@ -88,18 +89,31 @@ 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
> > +
> >  Configure and Cross Compile DPDK using Make
> >  -------------------------------------------
> >  To configure a build, choose one of the target configurations, like arm64-
> dpaa-linux-gcc and arm64-thunderx-linux-gcc.
>