linux-kernel - Re: [RFC PATCH 000/105] KVM: selftests: Overhaul APIs, purge VCPU

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Date:   Tue, 15 Mar 2022 09:08:14 +0100
From:   Andrew Jones <drjones@...hat.com>
To:     Oliver Upton <oupton@...gle.com>
Cc:     Sean Christopherson <seanjc@...gle.com>,
        linux-kernel@...r.kernel.org, kvm@...r.kernel.org,
        Paolo Bonzini <pbonzini@...hat.com>,
        Vitaly Kuznetsov <vkuznets@...hat.com>,
        Wanpeng Li <wanpengli@...cent.com>,
        Jim Mattson <jmattson@...gle.com>,
        Joerg Roedel <joro@...tes.org>, Thomas Huth <thuth@...hat.com>,
        Janosch Frank <frankja@...ux.ibm.com>,
        Claudio Imbrenda <imbrenda@...ux.ibm.com>,
        David Hildenbrand <david@...hat.com>,
        David Matlack <dmatlack@...gle.com>,
        Ben Gardon <bgardon@...gle.com>
Subject: Re: [RFC PATCH 000/105] KVM: selftests: Overhaul APIs, purge VCPU_ID

On Mon, Mar 14, 2022 at 05:56:53PM +0000, Oliver Upton wrote:
> 
> I think it may make more sense to only define optional functions as
> weak and let the compiler do the screaming for the required ones. Only
> discovering that functions are missing at runtime could be annoying if
> you're cross-compiling and running on a separate host with a different
> architecture.
>

Ah, indeed, no reason to push the lack of required arch functions to
runtime detection, compile time is much better. And, in those cases,
the _arch_ naming will also provide a nice hint that one must implement
it in arch specific code.

Thanks,
drew