linux-kernel - Re: [PATCH RESEND v4 5/9] KVM: VMX: Add init/set/get functions for SPP

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Date:   Tue, 20 Aug 2019 20:33:02 +0800
From:   Yang Weijiang <weijiang.yang@...el.com>
To:     Paolo Bonzini <pbonzini@...hat.com>
Cc:     Yang Weijiang <weijiang.yang@...el.com>,
        Jim Mattson <jmattson@...gle.com>,
        Sean Christopherson <sean.j.christopherson@...el.com>,
        Vitaly Kuznetsov <vkuznets@...hat.com>,
        kvm list <kvm@...r.kernel.org>,
        LKML <linux-kernel@...r.kernel.org>,
        "Michael S. Tsirkin" <mst@...hat.com>,
        Radim Krčmář <rkrcmar@...hat.com>,
        yu.c.zhang@...el.com, alazar@...defender.com
Subject: Re: [PATCH RESEND v4 5/9] KVM: VMX: Add init/set/get functions for
 SPP

On Mon, Aug 19, 2019 at 05:15:01PM +0200, Paolo Bonzini wrote:
> On 19/08/19 04:08, Yang Weijiang wrote:
> >> KVM_GET_NESTED_STATE has the requested information. If
> >> data.vmx.vmxon_pa is anything other than -1, then the vCPU is in VMX
> >> operation. If (flags & KVM_STATE_NESTED_GUEST_MODE), then L2 is
> >> active.
> > Thanks Jim, I'll reference the code and make necessary change in next
> > SPP patch release.
> 
> Since SPP will not be used very much in the beginning, it would be
> simplest to enable it only if nested==0.
> 
> Paolo
Thanks Paolo! Sure, will make the change and document it.