KVM: arm/arm64: GICv4: Unmap VLPI when freeing an LPI

When freeing an LPI (on a DISCARD command, for example), we need to unmap the VLPI down to the physical ITS level. Acked-by: Christoffer Dall <[email protected]> Signed-off-by: Marc Zyngier <[email protected]> Signed-off-by: Christoffer Dall <[email protected]>
mrcsosa · Nov 10, 2017 · 07b46ed · 07b46ed
1 parent 1b7fe46
commit 07b46ed
Showing 1 changed file with 5 additions and 1 deletion.
diff --git a/virt/kvm/arm/vgic/vgic-its.c b/virt/kvm/arm/vgic/vgic-its.c
@@ -631,8 +631,12 @@ static void its_free_ite(struct kvm *kvm, struct its_ite *ite)
 	list_del(&ite->ite_list);
 
 	/* This put matches the get in vgic_add_lpi. */
-	if (ite->irq)
+	if (ite->irq) {
+		if (ite->irq->hw)
+			WARN_ON(its_unmap_vlpi(ite->irq->host_irq));
+
 		vgic_put_irq(kvm, ite->irq);
+	}
 
 	kfree(ite);
 }