@@ -2000,6 +2000,7 @@ int kvm_set_irq_routing(struct kvm *kvm,
const struct kvm_irq_routing_entry *entries,
unsigned nr,
unsigned flags);
+int kvm_setup_empty_irq_routing_lockless(struct kvm *kvm);
int kvm_set_routing_entry(struct kvm *kvm,
struct kvm_kernel_irq_routing_entry *e,
const struct kvm_irq_routing_entry *ue);
@@ -237,3 +237,22 @@ int kvm_set_irq_routing(struct kvm *kvm,
return r;
}
+
+int kvm_setup_empty_irq_routing_lockless(struct kvm *kvm)
+{
+ struct kvm_irq_routing_table *new;
+ u32 i, j;
+
+ new = kzalloc(struct_size(new, map, 1), GFP_KERNEL_ACCOUNT);
+ if (!new)
+ return -ENOMEM;
+
+ new->nr_rt_entries = 1;
+ for (i = 0; i < KVM_NR_IRQCHIPS; i++)
+ for (j = 0; j < KVM_IRQCHIP_NUM_PINS; j++)
+ new->chip[i][j] = -1;
+
+ RCU_INIT_POINTER(kvm->irq_routing, new);
+
+ return 0;
+}
@@ -1242,6 +1242,10 @@ static struct kvm *kvm_create_vm(unsigned long type, const char *fdname)
if (r)
goto out_err;
+ r = kvm_setup_empty_irq_routing_lockless(kvm);
+ if (r)
+ goto out_err;
+
mutex_lock(&kvm_lock);
list_add(&kvm->vm_list, &vm_list);
mutex_unlock(&kvm_lock);