Re: [PATCH v7 0/2] x86/boot: Reduce assembly code

["Marek Marczykowski-Górecki" <marmarek@invisiblethingslab.com>]

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On Thu, Oct 03, 2024 at 10:27:15AM +0100, Frediano Ziglio wrote:
> On Thu, Oct 3, 2024 at 2:11 AM Marek Marczykowski-Górecki
> <marmarek@invisiblethingslab.com> wrote:
> >
> > On Wed, Oct 02, 2024 at 04:27:19PM +0100, Frediano Ziglio wrote:
> > > On Wed, Oct 2, 2024 at 3:04 PM Marek Marczykowski-Górecki
> > > <marmarek@invisiblethingslab.com> wrote:
> > > >
> > > > On Tue, Oct 01, 2024 at 11:22:37AM +0100, Frediano Ziglio wrote:
> > > > > This series came from part of the work of removing duplications between
> > > > > boot code and rewriting part of code from assembly to C.
> > > > > Rewrites EFI code in pure C.
> > > >
> > > > The MB2+EFI tests on Adler Lake fail with this series:
> > > > https://gitlab.com/xen-project/people/marmarek/xen/-/pipelines/1478766782
> > > > Looking at the VGA output (unfortunately not collected by the test
> > > > itself) it hangs just after bootloader, before printing anything on the
> > > > screen (or even clearing it after bootloader). The serial is silent too.
> > > >
> > >
> > > I tried multiple times to take a look at the logs, but I keep getting error 500.
> >
> > 500? That's weird. Anyway, serial log is empty, so you haven't lost
> > much.
> 
> I'm getting pretty consistently. I can see the full pipeline, but not
> the single logs. I tried with both Firefox and Chrome, I also tried
> from home (just to check for something like firewall issues), always
> error 500.
> 
> > But also, I've ran it a couple more times and it is some regression.
> > Staging reliably passes while staging+this series fails.
> >
> > Unfortunately I don't have any more info besides it hangs before
> > printing anything on serial or VGA. Maybe it hanging only on Intel but
> > not AMD is some hint? Or maybe it's some memory layout or firmware
> > differences that matter here (bootloader is exactly the same)?
> > FWIW some links:
> > successful staging run on ADL: https://gitlab.com/xen-project/people/marmarek/xen/-/jobs/7980146338
> > failed staging+this run on ADL: https://gitlab.com/xen-project/people/marmarek/xen/-/jobs/7980330394
> > successful staging run on Zen3+: https://gitlab.com/xen-project/people/marmarek/xen/-/jobs/7980146359
> > successful staging+this run on Zen3+: https://gitlab.com/xen-project/people/marmarek/xen/-/jobs/7980146359
> >
> 
> Furthermore, I tried with 2 additional machines in our Lab, one Intel,
> another AMD, both working for me.
> Either your compiler did something different or something special on
> the firmware.
> 
> I could try downloading your executables and machines there, but as I
> said, I'm getting error 500 (not sure if we package artifacts).
> 
> Can you try without last commit ?

Yes, this seems to work:
https://gitlab.com/xen-project/people/marmarek/xen/-/pipelines/1480052345

-- 
Best Regards,
Marek Marczykowski-Górecki
Invisible Things Lab

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