linux-kernel - RE: [RFC PATCH v3 1/7] KVM: x86: only allow exits disable before vCPUs created

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Message-ID: <DM6PR12MB3500110A9D2AEA90E93EC6FCCA8E9@DM6PR12MB3500.namprd12.prod.outlook.com>
Date:   Wed, 20 Jul 2022 18:38:46 +0000
From:   Kechen Lu <kechenl@...dia.com>
To:     Sean Christopherson <seanjc@...gle.com>
CC:     "kvm@...r.kernel.org" <kvm@...r.kernel.org>,
        "pbonzini@...hat.com" <pbonzini@...hat.com>,
        "vkuznets@...hat.com" <vkuznets@...hat.com>,
        Somdutta Roy <somduttar@...dia.com>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Subject: RE: [RFC PATCH v3 1/7] KVM: x86: only allow exits disable before
 vCPUs created



> -----Original Message-----
> From: Sean Christopherson <seanjc@...gle.com>
> Sent: Wednesday, July 20, 2022 10:50 AM
> To: Kechen Lu <kechenl@...dia.com>
> Cc: kvm@...r.kernel.org; pbonzini@...hat.com; vkuznets@...hat.com;
> Somdutta Roy <somduttar@...dia.com>; linux-kernel@...r.kernel.org
> Subject: Re: [RFC PATCH v3 1/7] KVM: x86: only allow exits disable before
> vCPUs created
> 
> External email: Use caution opening links or attachments
> 
> 
> On Wed, Jul 20, 2022, Sean Christopherson wrote:
> > On Tue, Jun 14, 2022, Kechen Lu wrote:
> > > From: Sean Christopherson <seanjc@...gle.com>
> > >
> > > Since VMX and SVM both would never update the control bits if exits
> > > are disable after vCPUs are created, only allow setting exits
> > > disable flag before vCPU creation.
> > >
> > > Fixes: 4d5422cea3b6 ("KVM: X86: Provide a capability to disable
> > > MWAIT
> > > intercepts")
> >
> > Don't wrap the Fixes: line (ignore any complaints from checkpatch).
> 
> Sorry, I didn't see that you had sent v4 already and replied to some v3
> patches.
> This one still holds true for v4 (very minor nit though).

Sure:)