From: Christoffer Dall <cdall@linaro.org>
Date: Wed, 19 Oct 2016 12:40:17 +0200
Subject: KVM: arm/arm64: Guard kvm_vgic_map_is_active against
 !vgic_initialized
Patch-mainline: v4.15-rc1
Git-commit: f39d16cbabf9f939745a3850a33760910d22ef35
References: bsc#1077761

If the vgic is not initialized, don't try to grab its spinlocks or
traverse its data structures.

This is important because we soon have to start considering the active
state of a virtual interrupts when doing vcpu_load, which may happen
early on before the vgic is initialized.

Signed-off-by: Christoffer Dall <cdall@linaro.org>
Acked-by: Marc Zyngier <marc.zyngier@arm.com>
Acked-by: Alexander Graf <agraf@suse.de>
---
 virt/kvm/arm/vgic/vgic.c |    3 +++
 1 file changed, 3 insertions(+)

--- a/virt/kvm/arm/vgic/vgic.c
+++ b/virt/kvm/arm/vgic/vgic.c
@@ -777,6 +777,9 @@
 	struct vgic_irq *irq = vgic_get_irq(vcpu->kvm, vcpu, virt_irq);
 	bool map_is_active;
 
+	if (!vgic_initialized(vcpu->kvm))
+		return false;
+
 	spin_lock(&irq->irq_lock);
 	map_is_active = irq->hw && irq->active;
 	spin_unlock(&irq->irq_lock);