@@ -331,6 +331,10 @@ static int kvm_s390_add_adapter_routes(S390FLICState *fs,
int ret, i;
uint64_t ind_offset = routes->adapter.ind_offset;
+ if (!kvm_gsi_routing_enabled()) {
+ return -ENOSYS;
+ }
+
for (i = 0; i < routes->num_routes; i++) {
ret = kvm_irqchip_add_adapter_route(kvm_state, &routes->adapter);
if (ret < 0) {
@@ -358,6 +362,10 @@ static void kvm_s390_release_adapter_routes(S390FLICState *fs,
{
int i;
+ if (!kvm_gsi_routing_enabled()) {
+ return;
+ }
+
for (i = 0; i < routes->num_routes; i++) {
if (routes->gsi[i] >= 0) {
kvm_irqchip_release_virq(kvm_state, routes->gsi[i]);
@@ -697,6 +697,7 @@ static void virtio_ccw_device_realize(VirtioCcwDevice *dev, Error **errp)
CCWDeviceClass *ck = CCW_DEVICE_GET_CLASS(ccw_dev);
SubchDev *sch;
Error *err = NULL;
+ int i;
sch = css_create_sch(ccw_dev->devno, errp);
if (!sch) {
@@ -717,6 +718,9 @@ static void virtio_ccw_device_realize(VirtioCcwDevice *dev, Error **errp)
ccw_dev->sch = sch;
dev->indicators = NULL;
dev->revision = -1;
+ for (i = 0; i < ADAPTER_ROUTES_MAX_GSI; i++) {
+ dev->routes.gsi[i] = -1;
+ }
css_sch_build_virtual_schib(sch, 0, VIRTIO_CCW_CHPID_TYPE);
trace_virtio_ccw_new_device(
If the kernel irqchip has been disabled, we don't want the {add,release}_adapter_routes routines to call any kvm_irqchip_* interfaces, as they may rely on an irqchip actually having been created. Just take a quick exit in that case instead. If you are trying to use irqfd without a kernel irqchip, we will fail with an error. Also initialize routes->gsi[] with -1 in the virtio-ccw handling, to make sure we don't trip over other errors, either. (Nobody else uses the gsi array in that structure.) Fixes: d426d9fba8ea ("s390x/virtio-ccw: wire up irq routing and irqfds") Reviewed-by: Thomas Huth <thuth@redhat.com> Acked-by: Christian Borntraeger <borntraeger@de.ibm.com> Message-Id: <20200117111147.5006-1-cohuck@redhat.com> Signed-off-by: Cornelia Huck <cohuck@redhat.com> --- hw/intc/s390_flic_kvm.c | 8 ++++++++ hw/s390x/virtio-ccw.c | 4 ++++ 2 files changed, 12 insertions(+)