KVM: arm/arm64: vgic-new: vgic_init: implement map_resources

[cascardo/linux.git] / virt / kvm / arm / vgic / vgic-init.c

diff --git a/virt/kvm/arm/vgic/vgic-init.c b/virt/kvm/arm/vgic/vgic-init.c
index bed3240..a1442f7 100644 (file)
--- a/virt/kvm/arm/vgic/vgic-init.c
+++ b/virt/kvm/arm/vgic/vgic-init.c
@@ -323,6 +323,34 @@ int vgic_lazy_init(struct kvm *kvm)
        return ret;
 }
 
+/* RESOURCE MAPPING */
+
+/**
+ * Map the MMIO regions depending on the VGIC model exposed to the guest
+ * called on the first VCPU run.
+ * Also map the virtual CPU interface into the VM.
+ * v2/v3 derivatives call vgic_init if not already done.
+ * vgic_ready() returns true if this function has succeeded.
+ * @kvm: kvm struct pointer
+ */
+int kvm_vgic_map_resources(struct kvm *kvm)
+{
+       struct vgic_dist *dist = &kvm->arch.vgic;
+       int ret = 0;
+
+       mutex_lock(&kvm->lock);
+       if (!irqchip_in_kernel(kvm))
+               goto out;
+
+       if (dist->vgic_model == KVM_DEV_TYPE_ARM_VGIC_V2)
+               ret = vgic_v2_map_resources(kvm);
+       else
+               ret = vgic_v3_map_resources(kvm);
+out:
+       mutex_unlock(&kvm->lock);
+       return ret;
+}
+
 /* GENERIC PROBE */
 
 static void vgic_init_maintenance_interrupt(void *info)