linux-kernel - Re: [PATCH 4/4] KVM: nVMX: Map enlightened VMCS upon restore when possible

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Message-ID: <83f9d6af-a3b1-a115-6f19-cbdf8693af11@redhat.com>
Date:   Tue, 4 May 2021 10:06:27 +0200
From:   Paolo Bonzini <pbonzini@...hat.com>
To:     Vitaly Kuznetsov <vkuznets@...hat.com>, kvm@...r.kernel.org
Cc:     Sean Christopherson <seanjc@...gle.com>,
        Wanpeng Li <wanpengli@...cent.com>,
        Jim Mattson <jmattson@...gle.com>,
        Maxim Levitsky <mlevitsk@...hat.com>,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH 4/4] KVM: nVMX: Map enlightened VMCS upon restore when
 possible

On 04/05/21 10:02, Vitaly Kuznetsov wrote:
> I still dislike the divergence and the fact
> that 'if (vmx->nested.hv_evmcs)' checks scattered across the code are
> not fully valid. E.g. how do we fix immediate KVM_GET_NESTED_STATE after
> KVM_SET_NESTED_STATE without executing the vCPU problem?

You obviously have thought about this more than I did, but if you can 
write a testcase for that as well, I can take a look.

Thanks,

Paolo