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KVM: arm/arm64: GICv4: Use pending_last as a scheduling hint 

When a vPE exits, the pending_last flag is set when there are pending
VLPIs stored in the pending table. Similarily, this flag will be set
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.

Acked-by: Christoffer Dall <cdall@linaro.org>
Reviewed-by: Eric Auger <eric.auger@redhat.com>
Signed-off-by: Marc Zyngier <marc.zyngier@arm.com>
Signed-off-by: Christoffer Dall <christoffer.dall@linaro.org>
This commit is contained in:
Marc Zyngier 2017-10-27 15:28:47 +01:00 committed by Christoffer Dall
parent 6ce18e3a5f
commit c971968071
1 changed files with 3 additions and 0 deletions
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3
virt/kvm/arm/vgic/vgic.c
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@ -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_irqsave(&vgic_cpu->ap_list_lock, flags);
list_for_each_entry(irq, &vgic_cpu->ap_list_head, ap_list) {