Thread (118 messages) 118 messages, 6 authors, 2017-09-06

[PATCH v3 50/59] KVM: arm/arm64: GICv4: Use pending_last as a scheduling hint

From: Christoffer Dall <hidden>
Date: 2017-08-28 18:18:52
Also in: kvm, kvmarm, lkml

On Mon, Jul 31, 2017 at 06:26:28PM +0100, Marc Zyngier wrote:
quoted hunk ↗ jump to hunk
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 <redacted>
---
 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 <redacted>
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