Re: [kvm-unit-tests PATCH v7 08/12] s390x: css: stsch, enumeration test

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On 18/05/2020 18.07, Pierre Morel wrote:
> First step for testing the channel subsystem is to enumerate the css and
> retrieve the css devices.
> 
> This tests the success of STSCH I/O instruction, we do not test the
> reaction of the VM for an instruction with wrong parameters.
> 
> Signed-off-by: Pierre Morel <pmorel@xxxxxxxxxxxxx>
> ---
>  s390x/Makefile      |  1 +
>  s390x/css.c         | 89 +++++++++++++++++++++++++++++++++++++++++++++
>  s390x/unittests.cfg |  4 ++
>  3 files changed, 94 insertions(+)
>  create mode 100644 s390x/css.c
[...]
> diff --git a/s390x/unittests.cfg b/s390x/unittests.cfg
> index 07013b2..a436ec0 100644
> --- a/s390x/unittests.cfg
> +++ b/s390x/unittests.cfg
> @@ -83,3 +83,7 @@ extra_params = -m 1G
>  [sclp-3g]
>  file = sclp.elf
>  extra_params = -m 3G
> +
> +[css]
> +file = css.elf
> +extra_params =-device ccw-pong

I gave your patch series a try on a normal upstream QEMU (that does not
have the ccw-pong device yet), and the css test of course fails there,
since QEMU bails out with:

 -device ccw-pong: 'ccw-pong' is not a valid device model name

This is unfortunate - I think we likely have to deal with QEMUs for
quite a while that do not have this device enabled. Could you maybe add
some kind of check to the kvm-unit-tests scripts that only run a test if
a given device is available, and skip the test otherwise?

 Thomas




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