Help improve 32-bit testing

Help improve 32-bit testing

[Richard Henderson]

Hiya,

I've just discovered a 32-bit build issue that is probably 3 weeks old.

While we still support 32-bit builds at all, I would request that we improve our 
cross-i686 testing.  For instance: we have cross-i686-user and cross-i686-tci.  There is 
some system build testing in the tci job, but (rightfully) not everything.

I would like a full cross-i686-system target that builds all targets, and I would like the 
debian-i686-cross image on which we base these to be more complete -- ideally, exactly 
matching x86_64.  In particular, CONFIG_SEV is not detected within the current docker 
image, which is where the current build error is located.

Do you have time to look at this?


r~

Re: Help improve 32-bit testing

[Thomas Huth]

On 25/06/2024 01.33, Richard Henderson wrote:
> Hiya,
> 
> I've just discovered a 32-bit build issue that is probably 3 weeks old.
> 
> While we still support 32-bit builds at all, I would request that we improve 
> our cross-i686 testing.  For instance: we have cross-i686-user and 
> cross-i686-tci.  There is some system build testing in the tci job, but 
> (rightfully) not everything.

System emulation on 32-bit x86 hosts is marked as deprecated since QEMU 8.0 
... maybe we could finally remove it instead?

> I would like a full cross-i686-system target that builds all targets, and I 
> would like the debian-i686-cross image on which we base these to be more 
> complete -- ideally, exactly matching x86_64.  In particular, CONFIG_SEV is 
> not detected within the current docker image, which is where the current 
> build error is located.
> 
> Do you have time to look at this?

If you really, really want to go a step backwards, then basically just 
revert commit 4f9a8315e65561bafa03651518aa5d22af09bdee and use the 
i686-debian-cross-container image instead of the removed 
i386-fedora-cross-container image.

  HTH,
   Thomas

Re: Help improve 32-bit testing

[Richard Henderson]

On 6/25/24 00:11, Thomas Huth wrote:
> On 25/06/2024 01.33, Richard Henderson wrote:
>> Hiya,
>>
>> I've just discovered a 32-bit build issue that is probably 3 weeks old.
>>
>> While we still support 32-bit builds at all, I would request that we improve our 
>> cross-i686 testing.  For instance: we have cross-i686-user and cross-i686-tci.  There is 
>> some system build testing in the tci job, but (rightfully) not everything.
> 
> System emulation on 32-bit x86 hosts is marked as deprecated since QEMU 8.0 ... maybe we 
> could finally remove it instead?

I'm ok with that too.  I just don't want the current situation to stand.


r~

Re: Help improve 32-bit testing

[Daniel P. Berrangé]

On Mon, Jun 24, 2024 at 04:33:08PM -0700, Richard Henderson wrote:
> Hiya,
> 
> I've just discovered a 32-bit build issue that is probably 3 weeks old.
> 
> While we still support 32-bit builds at all, I would request that we improve
> our cross-i686 testing.  For instance: we have cross-i686-user and
> cross-i686-tci.  There is some system build testing in the tci job, but
> (rightfully) not everything.
> 
> I would like a full cross-i686-system target that builds all targets, and I
> would like the debian-i686-cross image on which we base these to be more
> complete -- ideally, exactly matching x86_64.  In particular, CONFIG_SEV is
> not detected within the current docker image, which is where the current
> build error is located.

The debian-i686-cross image should already be a precise match for
the x86_64 image. Both are auto-generated by lcitool so have the
same package set as inputs.

With regards,
Daniel
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Re: Help improve 32-bit testing

[Philippe Mathieu-Daudé]

Hi Richard,

On 25/6/24 01:33, Richard Henderson wrote:
> Hiya,
> 
> I've just discovered a 32-bit build issue that is probably 3 weeks old.

How and what did you notice?

> While we still support 32-bit builds at all, I would request that we 
> improve our cross-i686 testing.  For instance: we have cross-i686-user 
> and cross-i686-tci.  There is some system build testing in the tci job, 
> but (rightfully) not everything.
> 
> I would like a full cross-i686-system target that builds all targets, 
> and I would like the debian-i686-cross image on which we base these to 
> be more complete -- ideally, exactly matching x86_64.  In particular, 
> CONFIG_SEV is not detected within the current docker image, which is 
> where the current build error is located.

Orthogonally to whether we should improve x86 testing on 32-bit
hosts, IIRC this isn't the first time we have an issue with SEV
(or more generically Confidential Computing) on 32-bit host, so
I wonder if this is a feature worth testing & supporting there
(thus Cc'ing more maintainers).

Regards,

Phil.

Re: Help improve 32-bit testing

[Richard Henderson]

On 6/25/24 00:57, Philippe Mathieu-Daudé wrote:
> Hi Richard,
> 
> On 25/6/24 01:33, Richard Henderson wrote:
>> Hiya,
>>
>> I've just discovered a 32-bit build issue that is probably 3 weeks old.
> 
> How and what did you notice?

https://lore.kernel.org/qemu-devel/91f19b8d-387a-47cd-b7cc-19cdf4442473@linaro.org/

With no arguments to configure on a debian bookworm i686 install.


r~

Re: Help improve 32-bit testing

[Alex Bennée]

Richard Henderson <richard.henderson@linaro.org> writes:

> Hiya,
>
> I've just discovered a 32-bit build issue that is probably 3 weeks old.
>
> While we still support 32-bit builds at all, I would request that we
> improve our cross-i686 testing.  For instance: we have cross-i686-user
> and cross-i686-tci.  There is some system build testing in the tci
> job, but (rightfully) not everything.
>
> I would like a full cross-i686-system target that builds all targets,
> and I would like the debian-i686-cross image on which we base these to
> be more complete -- ideally, exactly matching x86_64.  In particular,
> CONFIG_SEV is not detected within the current docker image, which is
> where the current build error is located.
>
> Do you have time to look at this?

See:

  Subject: [RFC PATCH] testing: restore some testing for i686
  Date: Tue, 25 Jun 2024 15:54:18 +0100
  Message-Id: <20240625145418.694476-1-alex.bennee@linaro.org>

-- 
Alex Bennée
Virtualisation Tech Lead @ Linaro