linux-kernel - Re: sev_es_trampoline_start undefined symbol referenced errors during kunit run

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Message-ID: <995cfca8-c261-4cf0-96f6-b33ca5403ee5@linuxfoundation.org>
Date: Tue, 15 Apr 2025 08:25:09 -0600
From: Shuah Khan <skhan@...uxfoundation.org>
To: Borislav Petkov <bp@...en8.de>
Cc: thomas.lendacky@....com, David Gow <davidgow@...gle.com>,
 "x86@...nel.org" <x86@...nel.org>,
 Brendan Higgins <brendan.higgins@...ux.dev>, linux-kernel@...r.kernel.org,
 Thomas Gleixner <tglx@...utronix.de>, Ingo Molnar <mingo@...hat.com>,
 Shuah Khan <skhan@...uxfoundation.org>
Subject: Re: sev_es_trampoline_start undefined symbol referenced errors during
 kunit run

On 4/14/25 17:00, Borislav Petkov wrote:
> On Mon, Apr 14, 2025 at 04:28:44PM -0600, Shuah Khan wrote:
>> Hi Tom,
>>
>> I have been seeing sev_es_trampoline_start undefined symbol referenced errors
>> during the following kunit test runs.
>>
>> ./tools/testing/kunit/kunit.py run --arch x86_64
>> ./tools/testing/kunit/kunit.py run --alltests --arch x86_64
>>
>> The error is here:
>>
>> ERROR:root:ld:arch/x86/realmode/rm/realmode.lds:236: undefined symbol `sev_es_trampoline_start' referenced in expression
>> make[6]: *** [../arch/x86/realmode/rm/Makefile:49: arch/x86/realmode/rm/realmode.elf] Error 1
>> make[5]: *** [../arch/x86/realmode/Makefile:22: arch/x86/realmode/rm/realmode.bin] Error 2
>> make[4]: *** [../scripts/Makefile.build:461: arch/x86/realmode] Error 2
>>
>
> 
> The real problem looks like that pasyms.h thing which gets included at the end
> of realmode.lds and which contains that symbol.
> 
> How exactly can this be reproduced? Exact steps please.

Run these kunit tests - not out of tree. Tree has to be
clean to run these tests. Otherwise you are prompted to
run mrproper.

./tools/testing/kunit/kunit.py run --arch x86_64
or
./tools/testing/kunit/kunit.py run --alltests --arch x86_64

The tree I see this every single time I do my tree testing.

thanks,
-- Shuah