Ipipe-Patch for kernel version 5.4.23

Greg Gallagher greg at embeddedgreg.com
Tue Mar 3 14:53:11 CET 2020


On Tue, Mar 3, 2020 at 8:46 AM Ralf Moder <ralf.moder at hbkworld.com> wrote:

> Am 02.03.20 um 17:01 schrieb Jan Kiszka:
> > On 02.03.20 16:17, Greg Gallagher wrote:
> >>
> >> On Mon, Mar 2, 2020 at 7:38 AM Jan Kiszka via Xenomai
> >> <xenomai at xenomai.org <mailto:xenomai at xenomai.org>> wrote:
> >>
> >>     On 02.03.20 11:00, Ralf Moder via Xenomai wrote:
> >>      > Hello everyone,
> >>      > I need the kernel version 5.4.23 in an embedded linux project
> >>     because of driver stuff but also the Xenomai extension. How big is
> >>     the probability that an I-pipe patch for the 5.4 version will be
> >>     released in the next 2 to 3 months?
> >>
> >>     I would first of all say that it's >0. But beyond that, it
> >> depends on
> >>     the architecture: x86 should be available on 5.4 in the next months
> >>     with
> >>     a probability >>50% as that will be my primary target for looking
> >> into
> >>     how to move forward. ARM and ARM64 currently lacks a maintainer.
> >> If we
> >>     are lucky, the base enabling via Philippe's dovetail queue will
> >> enable
> >>     those more or less as well. But it will definitely take someone
> >> to take
> >>     responsibility for those archs because my colleagues and I currently
> >>     cannot invest beyond integrating contributions. There is also ppc32
> >>     (which has a maintainer), but I suppose that this is not your
> >> target.
> >>
> >>     Jan
> >>
> >>     --     Siemens AG, Corporate Technology, CT RDA IOT SES-DE
> >>     Corporate Competence Center Embedded Linux
> >>
> >> If you need this for arm I was going to try to port the ipipe to 5.4
> >> in the near future. Effort wise it shouldn't be too bad, but it all
> >> depends on how much the upstream changes impact us.  What board are
> >> you targeting?
> it is a SoC from xilinx with 2 arm cortex a53 kernel on it

This is an ultrascale? I’ve run the current ipipe code (4.19) on the
ultra96 without issue.


> >
> > I suppose that questions addresses Ralf (provided he runs on ARM).
> >
> > As mentioned before, our tiny test lab currently contains for ARM a
> > BeagleBone Black and QEMU instance.
> The ESPRESSObin from marvell could be a good eval board for testing .If
> you need it we can send you one. Or we can test new patches here in our
> company.
> >>
> >> Jan, I can  help out maintaining the ARM ipipe.  We can talk offline
> >> if you'd like.
> It would be great if you could keep us up to date on your progress in
> patching kernel version 5.4. If we can support you in any way, let us know.
>
> > That would be great, looking forward!
> >
> > Jan
> >
> Ralf
>
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