linux-kernel - Re: [PATCH] kvm: nVMX: fix entry with pending interrupt if APICv is enabled

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Date:   Wed, 3 Oct 2018 16:54:46 +0200
From:   Paolo Bonzini <pbonzini@...hat.com>
To:     Sean Christopherson <sean.j.christopherson@...el.com>
Cc:     linux-kernel@...r.kernel.org, kvm@...r.kernel.org,
        Nikita Leshchenko <nikita.leshchenko@...cle.com>,
        Liran Alon <liran.alon@...cle.com>,
        Radim Krčmář <rkrcmar@...hat.com>
Subject: Re: [PATCH] kvm: nVMX: fix entry with pending interrupt if APICv is
 enabled

On 03/10/2018 16:53, Sean Christopherson wrote:
> Isn't enable_apicv redundant with kvm_vcpu_apicv_active()?  And since
> getting RVI requires a VMREAD, I think it would make sense to only
> fall into this code if !evaluate_pending_interrupts, e.g.:
> 
> 	if (!evaluate_pending_interrupts && kvm_vcpu_apicv_active(vcpu))
> 		evaluate_pending_interrupts |= vmx_get_rvi() > 0;

Yes, both suggestions make sense.  I'll make it
likely(!evaluate_pending_interrupts).

Thanks to both you and Nikita for the quick review!

Paolo