linux-kernel - Re: [PATCH v6 1/4] KVM: x86: Clarify the kvm_run.emulation

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Message-ID: <YWYeJ9TtfRwBk/5D@google.com>
Date:   Tue, 12 Oct 2021 23:45:43 +0000
From:   Sean Christopherson <seanjc@...gle.com>
To:     David Edmondson <david.edmondson@...cle.com>
Cc:     linux-kernel@...r.kernel.org, "H. Peter Anvin" <hpa@...or.com>,
        Vitaly Kuznetsov <vkuznets@...hat.com>, x86@...nel.org,
        Joerg Roedel <joro@...tes.org>, Ingo Molnar <mingo@...hat.com>,
        kvm@...r.kernel.org, Paolo Bonzini <pbonzini@...hat.com>,
        Jim Mattson <jmattson@...gle.com>,
        Borislav Petkov <bp@...en8.de>,
        Thomas Gleixner <tglx@...utronix.de>,
        Wanpeng Li <wanpengli@...cent.com>,
        David Matlack <dmatlack@...gle.com>
Subject: Re: [PATCH v6 1/4] KVM: x86: Clarify the kvm_run.emulation_failure
 structure layout

On Mon, Sep 20, 2021, David Edmondson wrote:
> Until more flags for kvm_run.emulation_failure flags are defined, it
> is undetermined whether new payload elements corresponding to those
> flags will be additive or alternative. As a hint to userspace that an
> alternative is possible, wrap the current payload elements in a union.
> 
> Suggested-by: Sean Christopherson <seanjc@...gle.com>
> Signed-off-by: David Edmondson <david.edmondson@...cle.com>
> ---

To complete the set... :-)

Reviewed-by: Sean Christopherson <seanjc@...gle.com>