linux-kernel - Re: [PATCH] KVM: x86: disable on 32-bit unless CONFIG

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Date:   Thu, 29 Sep 2022 15:26:03 +0200
From:   Paolo Bonzini <pbonzini@...hat.com>
To:     Sean Christopherson <seanjc@...gle.com>,
        Maxim Levitsky <mlevitsk@...hat.com>
Cc:     linux-kernel@...r.kernel.org, kvm@...r.kernel.org
Subject: Re: [PATCH] KVM: x86: disable on 32-bit unless CONFIG_BROKEN

On 9/28/22 19:55, Sean Christopherson wrote:
>> As far as my opinion goes I do volunteer to test this code more often,
>> and I do not want to see the 32 bit KVM support be removed*yet*.
>
> Yeah, I 100% agree that it shouldn't be removed until we have equivalent test
> coverage.  But I do think it should an "off-by-default" sort of thing.  Maybe
> BROKEN is the wrong dependency though?  E.g. would EXPERT be a better option?

Yeah, maybe EXPERT is better but I'm not sure of the equivalent test 
coverage.  32-bit VMX/SVM kvm-unit-tests are surely a good idea, but 
what's wrong with booting an older guest?

Paolo