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

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Date:   Mon, 19 Aug 2019 17:15:01 +0200
From:   Paolo Bonzini <pbonzini@...hat.com>
To:     Yang Weijiang <weijiang.yang@...el.com>,
        Jim Mattson <jmattson@...gle.com>
Cc:     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 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