Re: Error during --arch x86_64 kunit test run

[Shuah Khan]

On 3/12/25 20:21, David Gow wrote:
> On Thu, 13 Mar 2025 at 07:51, Shuah Khan <skhan@xxxxxxxxxxxxxxxxxxx> wrote:
> > On 3/12/25 16:52, David Gow wrote:
> > > Hi Shuah,
> > >
> > > On Thu, 13 Mar 2025 at 05:14, Shuah Khan <skhan@xxxxxxxxxxxxxxxxxxx> wrote:
> > > > David, Brendan, Rae,
> > > >
> > > > I am seeing the following error when I run
> > > >
> > > > ./tools/testing/kunit/kunit.py run --arch x86_64
> > > >
> > > > ERROR:root:ld:arch/x86/realmode/rm/realmode.lds:236: undefined symbol `sev_es_trampoline_start' referenced in expression
> > > >
> > > > I isolated it to dependency on CONFIG_AMD_MEM_ENCRYPT
> > >
> > > That's interesting. I recall seeing this issue briefly about a year
> > > ago on an internal branch, and we worked around it there by enabling
> > > CONFIG_AMD_MEM_ENCRYPT (which worked).
> > >
> > > But I've been totally unable to reproduce it this morning: are you
> > > seeing this on any particular branch / config / environment?
> >
> > linux_next - I did allmodconfig build prior to running the tests.
> > That means I had to run make ARCH=x86_64 mrproper before running
> >
> > ./tools/testing/kunit/kunit.py run --arch x86_64
> >
> > I tried something different checking out a fresh
> > linux_next repo and running ./tools/testing/kunit/kunit.py run --arch x86_64
> >
> > No errors on
> >
> > ./tools/testing/kunit/kunit.py run --arch x86_64
> >
> > I will try this again and let you know. Can you try this as well.
> >
> > - Clean linux_next and run tests
> > - Run tests after buidling allmodconfig and mrproper
>
> Thanks, Shuah.
>
> Alas, I've tried both on a clean linux-next (next-20250312), and after
> doing an allmodconfig build (and make mrproper), and am still unable
> to reproduce this here.
>
> I also dug up the old 5.10-based version we saw something similar on,
> and wasn't able to reproduce it there, either. (That had been built
> with clang, but using clang on upstream doesn't seem to reproduce it
> either.)
>
> I'll continue to play around with different setups, but none of the
> obvious things seem to work. Worst-case, I don't think it'd be a
> _problem_ to make EFI + AMD_MEM_ENCRYPT the default for the
> x86_64/qemu KUnit configuration.

I tried again starting with a clean linux_next repo next-20250313

- Ran tests first
- Built allmodconfig
- Ran mrproper
- Ran tests

Saw no problems. Let's watch and see if we can narrow the problem.
For now I was able to test the pr I will be sending soon.

thanks,
-- Shuah