Re: Question about a freeze under Xenomai 3.2.1

[Jan Kiszka <jan.kiszka@siemens.com>]

On 03.05.23 15:43, Julien Aube wrote:
> Hello,
> 
> 
> I'm currently porting an old code from Xenomai 2 to Xenomai 3/Dovetail.
> 
> I'm using kernel 5.10.177-dovetail1 as this is the latest version I
> could work with xenomai 3.2.1.

Well, 3.2.3 would also work with 5.15.y.

> The driver I'm porting makes heavy use of RTDM.
> 
> The platform is a Zynq 7030 (dual cortex-9).
> 
> I uses buildroot 2022.11 to build.
> 
> I hit a strange issue and ask for an advice before having to setup JTAG
> / opencd , as you may have seen
> the same issue before.
> 
> On the aforementioned platform , everything goes well as long as I do
> not enable SMP.
> If I do, what happens is that Ethernet's phy detection hangup forever :
> 
>> Registering platform device 'Fixed MDIO bus.0'. Parent at platform
>> device: 'Fixed MDIO bus.0': device_add
>> bus: 'platform': add device Fixed MDIO bus.0
>> device: 'fixed-0': device_add
>> bus: 'mdio_bus': add driver Micrel KS8737
>> [...]
>> bus: 'mdio_bus': add driver Microchip KSZ9477
>> bus: 'platform': add driver macb
>> bus: 'platform': driver_probe_device: matched device e000c000.ethernet
>> with driver macb
>> bus: 'platform': really_probe: probing driver macb with device
>> e000c000.ethernet
>> macb e000c000.ethernet: no pinctrl handle
>> device: 'e000c000.ethernet-ffffffff': device_add
> 
> If I disable SMP in the linux config kernel , here is what I have :
> 
>> Registering platform device 'Fixed MDIO bus.0'. Parent at platform
>> device: 'Fixed MDIO bus.0': device_add
>> bus: 'platform': add device Fixed MDIO bus.0
>> device: 'fixed-0': device_add
>> bus: 'mdio_bus': add driver Micrel KS8737
>> [...]
>> bus: 'mdio_bus': add driver Microchip KSZ9477
>> bus: 'platform': add driver macb
>> bus: 'platform': driver_probe_device: matched device e000c000.ethernet
>> with driver macb
>> bus: 'platform': really_probe: probing driver macb with device
>> e000c000.ethernet
>> macb e000c000.ethernet: no pinctrl handle
>> device: 'e000c000.ethernet-ffffffff': device_add
>> device: 'e000c000.ethernet-ffffffff:01': device_add
>> bus: 'mdio_bus': add device e000c000.ethernet-ffffffff:01
>> bus: 'mdio_bus': driver_probe_device: matched device
>> e000c000.ethernet-ffffffff:01 with driver Micrel KSZ9031 Gigabit PHY
>> bus: 'mdio_bus': really_probe: probing driver Micrel KSZ9031 Gigabit
>> PHY with device e000c000.ethernet-ffffffff:01
>> Micrel KSZ9031 Gigabit PHY e000c000.ethernet-ffffffff:01: no pinctrl
>> handle
>> driver: 'Micrel KSZ9031 Gigabit PHY': driver_bound: bound to device
>> 'e000c000.ethernet-ffffffff:01'
>> bus: 'mdio_bus': really_probe: bound device
>> e000c000.ethernet-ffffffff:01 to driver Micrel KSZ9031 Gigabit PHY
>> device: 'eth0': device_add
>> macb e000c000.ethernet eth0: Cadence GEM rev 0x00020118 at 0xe000c000
>> irq 24 (xx:xx:xx:xx:xx:xx)
> 
> Kernel command line is rather simple :
> 
>> console=ttyPS0,115200 earlyprintk root=/dev/nfs rw
> nfsroot=192.168.101.56:/home/rootfs/rootfs_2022,vers=4,tcp ip=dhcp
> 
> 
> => Is this something you already faced ?
> If not , do you have any insight on debugging method besides JTAG ?

First of all, can you reproduce the issue when disabling Xenomai? And
when also disabling dovetail? And when using the corresponding LTS
kernel as is?

Jan

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