linux-kernel - Re: [PATCH v2 000/144] KVM: selftests: Overhaul APIs, purge VCPU

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Message-ID: <2d8bcbb1-ee9d-8e88-b01d-88b80da86f13@redhat.com>
Date:   Mon, 13 Jun 2022 10:12:06 +0200
From:   Thomas Huth <thuth@...hat.com>
To:     Sean Christopherson <seanjc@...gle.com>,
        Anup Patel <anup@...infault.org>
Cc:     Paolo Bonzini <pbonzini@...hat.com>,
        KVM General <kvm@...r.kernel.org>,
        Vitaly Kuznetsov <vkuznets@...hat.com>,
        Andrew Jones <drjones@...hat.com>,
        David Matlack <dmatlack@...gle.com>,
        Ben Gardon <bgardon@...gle.com>,
        Oliver Upton <oupton@...gle.com>,
        "linux-kernel@...r.kernel.org List" <linux-kernel@...r.kernel.org>,
        Sean Christopherson <sean.j.christopherson@...el.com>,
        Marc Zyngier <maz@...nel.org>,
        Cornelia Huck <cohuck@...hat.com>
Subject: Re: [PATCH v2 000/144] KVM: selftests: Overhaul APIs, purge VCPU_ID

On 10/06/2022 02.57, Sean Christopherson wrote:
> +s390 folks...
> 
> On Fri, Jun 10, 2022, Sean Christopherson wrote:
>> On Thu, Jun 09, 2022, Sean Christopherson wrote:
>>> On Thu, Jun 09, 2022, Anup Patel wrote:
>>>> On Wed, Jun 8, 2022 at 9:26 PM Anup Patel <anup@...infault.org> wrote:
>>>>>
>>>>> On Tue, Jun 7, 2022 at 8:57 PM Paolo Bonzini <pbonzini@...hat.com> wrote:
>>>>>>
>>>>>> Marc, Christian, Anup, can you please give this a go?
>>>>>
>>>>> Sure, I will try this series.
>>>>
>>>> I tried to apply this series on top of kvm/next and kvm/queue but
>>>> I always get conflicts. It seems this series is dependent on other
>>>> in-flight patches.
>>>
>>> Hrm, that's odd, it's based directly on kvm/queue, commit 55371f1d0c01 ("KVM: ...).
>>
>> Duh, Paolo updated kvm/queue.  Where's Captain Obvious when you need him...
>>
>>>> Is there a branch somewhere in a public repo ?
>>>
>>> https://github.com/sean-jc/linux/tree/x86/selftests_overhaul
>>
>> I pushed a new version that's based on the current kvm/queue, commit 5e9402ac128b.
>> arm and x86 look good (though I've yet to test on AMD).
>>
>> Thomas,
>> If you get a chance, could you rerun the s390 tests?  The recent refactorings to
>> use TAP generated some fun conflicts.

Still works fine!
Tested-by: Thomas Huth <thuth@...hat.com>

>> Speaking of TAP, I added a patch to convert __TEST_REQUIRE to use ksft_exit_skip()
>> instead of KVM's custom print_skip().  The s390 tests are being converted to use
>> TAP output, I couldn't see any advantage of KVM's arbitrary "skipping test" over
>> TAP-friendly output, and converting everything is far easier than special casing s390.

Sounds like a good idea to me. I already considered starting to convert some 
x86 tests, too 
(https://lore.kernel.org/linux-kselftest/20220429071149.488114-1-thuth@redhat.com 
), but didn't get much feedback there yet, but anyway, we'll be better 
prepared with your change for that now.

  Thomas