[PATCH] KVM: arm/arm64: Avoid attempting to load timer vgic state without a vgic

[Christoffer Dall]

The timer optimization patches inadvertendly changed the logic to always
load the timer state as if we have a vgic, even if we don't have a vgic.

Fix this by doing the usual irqchip_in_kernel() check and call the
appropriate load function.

Signed-off-by: Christoffer Dall <christoffer.dall at linaro.org>
---
I'm aware that this looks slightly ugly following the no_vgic label, but
this code is about to disappear with the vcpu_load/vcpu_put series, so
it's just a fix for the current version.

 virt/kvm/arm/arch_timer.c | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/virt/kvm/arm/arch_timer.c b/virt/kvm/arm/arch_timer.c
index 190c99e..f9555b1 100644
--- a/virt/kvm/arm/arch_timer.c
+++ b/virt/kvm/arm/arch_timer.c
@@ -835,7 +835,10 @@ int kvm_timer_enable(struct kvm_vcpu *vcpu)
 no_vgic:
 	preempt_disable();
 	timer->enabled = 1;
-	kvm_timer_vcpu_load_vgic(vcpu);
+	if (!irqchip_in_kernel(vcpu->kvm))
+		kvm_timer_vcpu_load_user(vcpu);
+	else
+		kvm_timer_vcpu_load_vgic(vcpu);
 	preempt_enable();
 
 	return 0;
-- 
2.7.4