linux-kernel - Re: [PATCH v2 12/21] KVM: x86: Make kvm_queued_exception a properly named, visible struct

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Date:   Mon, 18 Jul 2022 15:40:49 +0000
From:   Sean Christopherson <seanjc@...gle.com>
To:     Maxim Levitsky <mlevitsk@...hat.com>
Cc:     Paolo Bonzini <pbonzini@...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, Oliver Upton <oupton@...gle.com>,
        Peter Shier <pshier@...gle.com>
Subject: Re: [PATCH v2 12/21] KVM: x86: Make kvm_queued_exception a properly
 named, visible struct

On Mon, Jul 18, 2022, Maxim Levitsky wrote:
> On Mon, 2022-07-18 at 16:07 +0300, Maxim Levitsky wrote:
> > On Tue, 2022-06-14 at 20:47 +0000, Sean Christopherson wrote:
> > > Move the definition of "struct kvm_queued_exception" out of kvm_vcpu_arch
> > > in anticipation of adding a second instance in kvm_vcpu_arch to handle
> > > exceptions that occur when vectoring an injected exception and are
> > > morphed to VM-Exit instead of leading to #DF.
> > > 
> > > Opportunistically take advantage of the churn to rename "nr" to "vector".
> > > 
> > > No functional change intended.
> > > 
> > > Signed-off-by: Sean Christopherson <seanjc@...gle.com>
> > > ---
> > > 
> > ...
> > 
> > 
> > Is this change below intentional? My memory on nested_apf_token is quite rusty, but at least
> > if possible, I would prefer this to be done in separate patch.

Yikes!  It's not intention as of this patch.  It _is_ intentional for the "morph"
patch, as KVM can simply force "has_payload" in kvm_inject_page_fault() when
directly queueing the VM-Exit.  I suspect I botched this patch when splitting the
original changes into separate patches.

> Sorry, I replied to the wrong mail, but the newer version also has the same issue.
> (It should be v3 btw.)

Argh, sorry about the versioning mixup.  I distinctly remember thinking this
couldn't possibly have been only the second version...  Should have double-checked
instead of trusting my archive.