linux-kernel - Re: [PATCH v2 05/11] KVM: SVM: Re-inject INT3/INTO instead of retrying the instruction

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Date:   Thu, 28 Apr 2022 14:25:08 +0000
From:   Sean Christopherson <seanjc@...gle.com>
To:     "Maciej S. Szmigiero" <mail@...iej.szmigiero.name>
Cc:     Maxim Levitsky <mlevitsk@...hat.com>,
        Vitaly Kuznetsov <vkuznets@...hat.com>,
        Wanpeng Li <wanpengli@...cent.com>,
        Jim Mattson <jmattson@...gle.com>,
        Joerg Roedel <joro@...tes.org>, kvm@...r.kernel.org,
        linux-kernel@...r.kernel.org, Paolo Bonzini <pbonzini@...hat.com>
Subject: Re: [PATCH v2 05/11] KVM: SVM: Re-inject INT3/INTO instead of
 retrying the instruction

On Thu, Apr 28, 2022, Maciej S. Szmigiero wrote:
> On 28.04.2022 11:37, Maxim Levitsky wrote:
> > On Sat, 2022-04-23 at 02:14 +0000, Sean Christopherson wrote:
> > > @@ -1618,7 +1644,7 @@ static int svm_set_nested_state(struct kvm_vcpu *vcpu,
> > >   	nested_copy_vmcb_control_to_cache(svm, ctl);
> > >   	svm_switch_vmcb(svm, &svm->nested.vmcb02);
> > > -	nested_vmcb02_prepare_control(svm, save->rip);
> > > +	nested_vmcb02_prepare_control(svm, svm->vmcb->save.rip);
> > 
> > Is this change intentional?
> 
> It looks to me the final code is correct since "svm->vmcb->save"
> contains L2 register save, while "save" has L1 register save.
> 
> It was the patch 1 from this series that was incorrect in
> using "save->rip" here instead.

Yeah, I botched the fixup.