Re: Switching from xenomai 3.2 IPIPE to xenomai 3.3 Dovetail

[Philippe Gerum <rpm@xenomai.org>]

François Legal <devel@thom.fr.eu.org> writes:

> Le Lundi, Novembre 18, 2024 11:32 CET, Florian Bezdeka <florian.bezdeka@siemens.com> a écrit: 
>  
>> On Mon, 2024-11-18 at 11:21 +0100, François Legal wrote:
>> > Le Lundi, Novembre 18, 2024 10:01 CET, Jan Kiszka <jan.kiszka@siemens.com> a écrit: 
>> >  
>> > > On 18.11.24 09:50, François Legal wrote:
>> > > > Hello,
>> > > > 
>> > > > running on an Arm v7 cortex A9 platform, I'm trying to switch from xenomai 3.2 (linux 5.4 IPIPE) to xenomai 3.3 (linux 5.15 Dovetail).
>> > > > 
>> > > > I can successfully boot my system with linux 5.15 + CONFIG_DOVETAIL, but as soon as I enable Xenomai (CONFIG_XENOMAI), I got stuck at boot in a do_idle loop. Did I miss anything ?
>> > > > 
>> > > > Attached is my config.
>> > > 
>> > > Can you factor out from it what the SoC is, if you patched the kernel
>> > > for it (in the past and now), if you had to adopt Dovetail etc.?
>> > > 
>> > > Jan
>> > 
>> > The SoC is Xilinx zynq 7000. I have custom patches for custom FPGA peripherals (which most of them have been successfully ported to 5.15).
>> 
>> We had a similar report for the zynq 7020 a couple of days ago.
>> See [1].
>> 
>> What happens if you disable CONFIG_SMP? (Not that this should be the
>> final solution, but it might help to track the issue down...)
>> 
>> Florian
>> 
>
> Disabling config SMP makes my system boot again.
> How can I help working this out ?
>
> François
>

This looks like an issue with the proxy tick device. First thing is to
disable CONFIG_XENOMAI, enabling CONFIG_IRQ_PIPELINE_TORTURE_TEST. If
the kernel still hangs, we may have a hint about the reason
why. Alternatively, you could keep CONFIG_XENOMAI in, booting the kernel
with "xenomai.state=stopped". If no hang occurs at boot anymore, there
may be an issue with proxying the timer device on this SoC.

[1] https://v4.xenomai.org/dovetail/porting/timer/
[2] https://v4.xenomai.org/dovetail/porting/devnotes/#check-that-the-pipeline-torture-tests-pass

-- 
Philippe.