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Re: [qemu-s390x] [Qemu-devel] [RFC PATCH v2 0/3] tests for CCW IDA

From: Halil Pasic
Subject: Re: [qemu-s390x] [Qemu-devel] [RFC PATCH v2 0/3] tests for CCW IDA
Date: Tue, 12 Dec 2017 00:10:29 +0100
User-agent: Mozilla/5.0 (X11; Linux x86_64; rv:52.0) Gecko/20100101 Thunderbird/52.4.0

On 12/07/2017 12:53 PM, Cornelia Huck wrote:
> On Thu, 7 Dec 2017 10:01:35 +0100
> Thomas Huth <address@hidden> wrote:
>> On 07.12.2017 07:38, Thomas Huth wrote:
>>> On 08.11.2017 17:54, Halil Pasic wrote:  
>>>> I've keept the title althogh the scope shifted a bit: it's
>>>> more about introducing ccw-testdev than about IDA. The goal
>>>> is to facilitate testing the virtual channel subsystem
>>>> implementation, and the ccw interpretation.
>>>> The first patch is the interesting one. See it's cover letter
>>>> for details. The RFC is about discussing some technical issues
>>>> with this patch.
>>>> The other two patches are an out of source kernel module which
>>>> is basically only there so you can try out the first patch. The
>>>> tests there should probably be ported to something else. I don't
>>>> know what: maybe kvm-unit-tests, maybe qtest+libqos, or maybe some
>>>> bios based test image. We still have to figure out that.   
>>> I think both, kvm-unit-tests or qtest+libqos would be good candidates.
>>> Please don't invent a new bios base test image, since kvm-unit-tests
>>> should be very similar already and we really don't need to duplicate
>>> work here.
>>> Anyway, you'd need to add some CSS infracture there first (in both
>>> kvm-unit-tests and the qtest environments), so it's likely a similar
>>> amount of work. qtest has the advantage that it gets checked
>>> automatically during "make check" each time, so I'd have a weak
>>> preference for that one.  
>> Another thought: I'd also like to see the more complex virtio device
>> qtests enabled for virtio-ccw one day (e.g. tests/virtio-blk-test.c), so
>> I think we sooner or later should have some CSS infrastructure in the
>> qtests anyway ==> May I suggest that you have a try with the qtest approach?
> Agreed, this would be helpful to get more ccw coverage in general.

Yeah qtest+libqos does seem like the most likely candidate. We
are likely to go down this path. I say we, because it seems likely
that the guest counterpart with the unit test suite is going to
be done by somebody having more time to invest into this.


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