arm/arm64: KVM: dont rely on a valid GICH base address

To check whether the vGIC was already initialized, we currently check
the GICH base address for not being NULL. Since with GICv3 we may
get along without this address, lets use the irqchip_in_kernel()
function to detect an already initialized vGIC.

Signed-off-by: Andre Przywara <andre.przywara@arm.com>
Acked-by: Christoffer Dall <christoffer.dall@linaro.org>
Acked-by: Marc Zyngier <marc.zyngier@arm.com>
Signed-off-by: Christoffer Dall <christoffer.dall@linaro.org>

diff --git a/virt/kvm/arm/vgic.c b/virt/kvm/arm/vgic.c
index 69f6e7aa573edabf740c934ead3a66e1794f72af..1c3b75eb28f0b629530500149808bb8620a49752 100644 (file)
--- a/virt/kvm/arm/vgic.c
+++ b/virt/kvm/arm/vgic.c
@@ -2094,7 +2094,7 @@ int kvm_vgic_create(struct kvm *kvm, u32 type)
 
        mutex_lock(&kvm->lock);
 
-       if (kvm->arch.vgic.vctrl_base) {
+       if (irqchip_in_kernel(kvm)) {
                ret = -EEXIST;
                goto out;
        }