linux-kernel - Re: [PATCH 1/2] KVM: VMX: Invoke kvm_exit tracepoint on VM-Exit due to failed VM-Enter

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Message-ID: <20200511170823.GD24052@linux.intel.com>
Date:   Mon, 11 May 2020 10:08:23 -0700
From:   Sean Christopherson <sean.j.christopherson@...el.com>
To:     Paolo Bonzini <pbonzini@...hat.com>
Cc:     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
Subject: Re: [PATCH 1/2] KVM: VMX: Invoke kvm_exit tracepoint on VM-Exit due
 to failed VM-Enter

On Sat, May 09, 2020 at 02:54:42PM +0200, Paolo Bonzini wrote:
> On 09/05/20 01:53, Sean Christopherson wrote:
> > Restore the pre-fastpath behavior of tracing all VM-Exits, including
> > those due to failed VM-Enter.
> > 
> > Fixes: 032e5dcbcb443 ("KVM: VMX: Introduce generic fastpath handler")
> > Signed-off-by: Sean Christopherson <sean.j.christopherson@...el.com>
> > ---
> >  arch/x86/kvm/vmx/vmx.c | 4 ++--
> >  1 file changed, 2 insertions(+), 2 deletions(-)
> 
> Squashed, thanks.  Though is it really the right "Fixes"?

Pretty sure, that's the commit that moved trace_kvm_exit() from
vmx_handle_exit() to vmx_vcpu_run().  Prior to that, all fastpaths still
flowed through vmx_handle_exit().