linux-kernel - Re: [PATCH v3 05/37] KVM: x86: Export kvm_propagate_fault() (as kvm_inject_emulated_page

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Date:   Tue, 24 Mar 2020 00:56:32 +0100
From:   Paolo Bonzini <pbonzini@...hat.com>
To:     Sean Christopherson <sean.j.christopherson@...el.com>,
        Vitaly Kuznetsov <vkuznets@...hat.com>
Cc:     Wanpeng Li <wanpengli@...cent.com>,
        Jim Mattson <jmattson@...gle.com>,
        Joerg Roedel <joro@...tes.org>, kvm@...r.kernel.org,
        linux-kernel@...r.kernel.org, Ben Gardon <bgardon@...gle.com>,
        Junaid Shahid <junaids@...gle.com>,
        Liran Alon <liran.alon@...cle.com>,
        Boris Ostrovsky <boris.ostrovsky@...cle.com>,
        John Haxby <john.haxby@...cle.com>,
        Miaohe Lin <linmiaohe@...wei.com>,
        Tom Lendacky <thomas.lendacky@....com>
Subject: Re: [PATCH v3 05/37] KVM: x86: Export kvm_propagate_fault() (as
 kvm_inject_emulated_page_fault)

On 23/03/20 17:24, Sean Christopherson wrote:
>> We don't seem to use the return value a lot, actually,
>> inject_emulated_exception() seems to be the only one, the rest just call
>> it without checking the return value. Judging by the new name, I'd guess
>> that the function returns whether it was able to inject the exception or
>> not but this doesn't seem to be the case. My suggestion would then be to
>> make it return 'void' and return 'fault->nested_page_fault' separately
>> in inject_emulated_exception().
> Oooh, I like that idea.  The return from the common helper also confuses me
> every time I look at it.
> 

Separate patch, please.  I'm not sure it makes a great difference though.

Paolo