linux-kernel - Re: [RFC PATCH 1/1] drm/format-helper: Add KUnit tests for drm_fb_xrgb8888_to

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Message-ID: <fea8f80a-939b-2c73-d94b-5179d1e65be9@redhat.com>
Date:   Thu, 2 Jun 2022 19:29:44 +0200
From:   Javier Martinez Canillas <javierm@...hat.com>
To:     David Gow <davidgow@...gle.com>,
        José Expósito <jose.exposito89@...il.com>
Cc:     Maxime Ripard <maxime@...no.tech>,
        KUnit Development <kunit-dev@...glegroups.com>,
        tzimmermann@...e.de, maarten.lankhorst@...ux.intel.com,
        David Airlie <airlied@...ux.ie>,
        Daniel Vetter <daniel@...ll.ch>,
        dri-devel@...ts.freedesktop.org,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>
Subject: Re: [RFC PATCH 1/1] drm/format-helper: Add KUnit tests for
 drm_fb_xrgb8888_to_rgb332()

On 6/2/22 19:12, David Gow wrote:
> On Mon, May 30, 2022 at 9:29 AM José Expósito <jose.exposito89@...il.com> wrote:

[snip]

>>
>> A .kuniconfig example is present in the cover letter. (...)
>
> FYI: it's also possible to run these tests under UML with the extra options:
> CONFIG_VIRTIO_UML=y
> CONFIG_UML_PCI_OVER_VIRTIO=y
>

Oh, very interesting. I didn't notice before that his example had --arch=x86_64

> I suspect it's probably better not to add those to your .kunitconfig,
> as they're UML-specific and will therefore break other architectures,
> but it does mean the tests can be run with, for example:
> 
> ./tools/testing/kunit/kunit.py run --kunitconfig
> drivers/gpu/drm/.kunitconfig --kconfig_add CONFIG_VIRTIO_UML=y
> --kconfig_add CONFIG_UML_PCI_OVER_VIRTIO=y
> 
> Or, without the .kunitconfig:
> ./tools/testing/kunit/kunit.py run --kconfig_add CONFIG_DRM=y
> --kconfig_add CONFIG_DRM_FORMAR_HELPER_TEST=y --kconfig_add
> CONFIG_VIRTIO_UML=y  --kconfig_add CONFIG_UML_PCI_OVER_VIRTIO=y
> 'drm-*'
>

I wonder if would make sense to have for example an arch/um/.kunitconfig
with those symbols and maybe others and then the tests could also be run
with something like:

./tools/testing/kunit/kunit.py run --kunitconfig=drivers/gpu/drm/.kunitconfig \
--kunitconfig=arch/um/.kunitconfig

-- 
Best regards,

Javier Martinez Canillas
Linux Engineering
Red Hat