From mboxrd@z Thu Jan 1 00:00:00 1970 From: Christoffer Dall Subject: Re: [PATCH v3 50/59] KVM: arm/arm64: GICv4: Use pending_last as a scheduling hint Date: Mon, 28 Aug 2017 20:18:46 +0200 Message-ID: <20170828181846.GK24649@cbox> References: <20170731172637.29355-1-marc.zyngier@arm.com> <20170731172637.29355-51-marc.zyngier@arm.com> Mime-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Cc: Jason Cooper , kvm@vger.kernel.org, linux-kernel@vger.kernel.org, linux-arm-kernel@lists.infradead.org, Thomas Gleixner , kvmarm@lists.cs.columbia.edu To: Marc Zyngier Return-path: Content-Disposition: inline In-Reply-To: <20170731172637.29355-51-marc.zyngier@arm.com> List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: kvmarm-bounces@lists.cs.columbia.edu Sender: kvmarm-bounces@lists.cs.columbia.edu List-Id: kvm.vger.kernel.org On Mon, Jul 31, 2017 at 06:26:28PM +0100, Marc Zyngier wrote: > When a vPE exits, the pending_last flag is set when there are > pending VLPIs stored in the pending table. Similarily, we set > this flag when a doorbell interrupt fires, as it indicates the > same condition. > > Let's update kvm_vgic_vcpu_pending_irq() to account for that > flag as well, making a vcpu runnable when set. > > Signed-off-by: Marc Zyngier > --- > virt/kvm/arm/vgic/vgic.c | 3 +++ > 1 file changed, 3 insertions(+) > > diff --git a/virt/kvm/arm/vgic/vgic.c b/virt/kvm/arm/vgic/vgic.c > index a96e566905d2..dfac894f6f03 100644 > --- a/virt/kvm/arm/vgic/vgic.c > +++ b/virt/kvm/arm/vgic/vgic.c > @@ -781,6 +781,9 @@ int kvm_vgic_vcpu_pending_irq(struct kvm_vcpu *vcpu) > if (!vcpu->kvm->arch.vgic.enabled) > return false; > > + if (vcpu->arch.vgic_cpu.vgic_v3.its_vpe.pending_last) > + return true; > + > spin_lock(&vgic_cpu->ap_list_lock); > > list_for_each_entry(irq, &vgic_cpu->ap_list_head, ap_list) { > -- > 2.11.0 > Acked-by: Christoffer Dall