Re: [Buildroot] [PATCH v1 2/2] configs/zynqmp_zcu106_defconfig: transition to tarballs

[Luca Ceresoli via buildroot <buildroot@buildroot.org>]

Hi Neal,

On Wed, 17 Aug 2022 17:23:41 +0000
"Frager, Neal" <neal.frager@amd.com> wrote:

> Hi Luca,
> 
> > Hi Luca,
> >   
> > > Hi Neal,  
> > 
> > On 13/05/22 06:21, Neal Frager wrote:  
> > > Hi Peter, Luca,
> > >
> > >
> > >    
> > >> Le 12 mai 2022 à 21:33, Peter Korsgaard <peter@korsgaard.com> a écrit :
> > >>
> > >> CAUTION: This message has originated from an External Source. Please use proper judgment and caution when opening attachments, clicking links, or responding to this email.
> > >>
> > >>    
> > >>>>>>> "Neal" == Neal Frager <nealf@xilinx.com> writes:    
> > >>
> > >> Hi,
> > >>    
> > >>>>> I had to also pass the -m* flags in EXTRA_COMPILER_FLAGS to get 
> > >>>>> it to link, presumably the petalinux toolchain has incompatible 
> > >>>>> defaults. Luca, any specific reasons to not pass CFLAGS there?  
> > >>>>
> > >>>> I'm afraid I have no real answer. :( When I initially wrote the 
> > >>>> script I did it to have the same logic as petalinux. Later I 
> > >>>> didn't watch for its changes. I would love to be helpful but I 
> > >>>> have no access to a zynqmp board now.  
> > >>    
> > >>> Would it be possible for you to just implement the changes that 
> > >>> Peter has proposed?  Peter appears to have already identified a solution.  
> > >>    
> > >>> Both Peter and I have zcu106 boards, so we can both test and 
> > >>> verify the update works.  
> > >>
> > >> Sorry, that is not true. I haven't found the magic incarnation to 
> > >> get a working pmufw build with the toolchain built by crosstool-ng. 
> > >> My diff was just to show what I had to change to adjust 
> > >> zynqmp-pmufw-builder to use a petalinux toolchain.
> > >>    
> > >
> > > Is there a reason why we cannot change the zynqmp-pmufw-builder to download the same toolchain that petalinux uses as the crosstool-ng toolchain?    
> >   
> > > Can you point to where the petalinux toolchain comes from?    
> >   
> > > If petalinux uses a publicly available prebuilt toolchain, possibly with sources available, then this could be considered.    
> >   
> > > However I suspect it does use a toolchain that is shipped by Vitis. If it is the case, then it's not an option here.    
> >   
> > > The est option would be to fix the ct-ng toolchain of course, but 
> > > I'm afraid I cannot be very helpful on this, especially without an 
> > > hardware to test. :(  
> >   
> > > Vitis and PetaLinux 2022.1 use GCC compiler 11.2.0 with the following patch set:
> > > https://github.com/Xilinx/meta-xilinx/tree/xlnx-rel-v2022.1/meta-mic
> > > roblaze/recipes-devtools/gcc/gcc-11  
> > 
> > I wanted to follow up on this.  Have you had a chance to apply these patches to the compiler used by the zynqmp-pmufw-builder?
> > 
> > It would be great if we could update the zynqmp-pmufw-builder to generate good pmufw images for zynqmp and kria soms in time for the 2022.2 update.  
> 
> > Apologies, I had zero spare time to try this. :(  
> 
> I hope it is ok, but while the zynqmp-pmufw-builder compiler is still creating pmufw images that cannot correctly soft reboot,
> I have created a temporary solution using pmufw images built with petalinux.
> 
> https://github.com/nealfrager/zynqmp_pmufw
> 
> I just submitted a patch today that migrates the zynqmp defconfigs to use these pmufw images instead of the ones
> generated by the zynqmp-pmufw-builder tool.
> 
> https://patchwork.ozlabs.org/project/buildroot/patch/20220817115249.9894-1-neal.frager@xilinx.com/
> 
> Once we get the zynqmp-pmufw-builder tool working properly again, I would be happy to switch buildroot back to using it.
> 
> Are you ok with this solution?

Given I'm the one who is keeping this idle, I surely cannot blame you!

FYI: I definitely would like to address this issue and hope to find
some time to do that. That said, any patches would be welcome too.

Thanks for your effort.

-- 
Luca Ceresoli, Bootlin
Embedded Linux and Kernel engineering
https://bootlin.com
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