> > <snip>
> >
> > > Subject: Re: [dpdk-dev] [PATCH v5 2/4] build: add arm32 meson build
> > > flags
> > >
> > > On Mon, Jul 6, 2020 at 1:59 PM Juraj Linkeš
> > > <juraj.lin...@pantheon.tech>
> > > wrote:
> > > >
> > > > Base the flags on config/defconfig_arm-armv7a-linuxapp-gcc.
> > > > Omit driver flags which can be built on arm32.
> > > >
> > > > Signed-off-by: Juraj Linkeš <juraj.lin...@pantheon.tech>
> > >
> > > Hi Juraj,
> > >
> > > Not strictly specific to this patch. Just to understand, How armv7
> > > support has been used?
> > I do not know how armv7 support is being used. I have not heard of
> anything so far.
> >
> > In this patch arm32 is actually referring to aarch32.
> >
> > > - Is it for Running arm32 program on arm64 machines?
> > I am not sure if anyone would run armv7 binaries on arm64 machines. I
> would think they will at least go through a re-compilation (to aarch32) and
> test phase.
> >
> > > - Is it for Native DPDK support from arm32. If so, What kind of PMD
> > > supports native arm32 DPDK?
> > Yes, this is for DPDK on aarch32 support. We do not have any plans to
> enable any PMD for aarch32. The current goal is to make sure that the code
> compiles for aarch32. Internally, we have validated few test cases for the
> libraries.
>
> One thing is lack of PMD support and other is lack PCI HW support for
> armv7 machines in general.
>
>
> >
> > >
> > > Or some other use case?
> > >
> > > I would like to understand the arm32 use case, so we can review it
> > > at that angle.
> >
> > I believe armv7a compilation is not supported in meson. Do you have any
> thoughts? Do you plan to maintain the support for armv7a?
>
> Armv7 is maintained by:
> ARM v7
> M: Jan Viktorin <vikto...@rehivetech.com>
> M: Ruifeng Wang <ruifeng.w...@arm.com>
> F: lib/librte_eal/arm/
>
> My only concern is if there is no REAL use case for armv7 in DPDK, May it is
> not worth to add a lot of code and make it complicated for arm64.
> At a minimum, If we are planning to add armv7 support then please split
> config/arm/meson.build file as two for arm64 and armv7.
If no one objects, may be we should skip armv7.
But, we need to do aarch32 for compilation/unit tests for libraries as
platforms (N1 based) exist with aarch32+PCI. We can skip the PMD support right
now. Is that ok?
