GSI_BASE_PRIMARY
r1 = __kvm_irqfd(vm, GSI_BASE_PRIMARY, eventfd, 0);
r2 = __kvm_irqfd(vm, GSI_BASE_PRIMARY + 1, eventfd, 0);
kvm_irqfd(vm, GSI_BASE_PRIMARY, eventfd, KVM_IRQFD_FLAG_DEASSIGN);
kvm_irqfd(vm, GSI_BASE_PRIMARY + 1, eventfd, KVM_IRQFD_FLAG_DEASSIGN);