[Qemu-devel] [PATCH 03/10] virtio-ccw: disable ioevent bit when ioeventfds are not enabled

[Aurelien Jarno <aurelien@aurel32.net>]

This remove the corresponding error messages in TCG mode, and allow to
simplify the s390_assign_subch_ioeventfd() function.

CC: Cornelia Huck <cornelia.huck@de.ibm.com>
Cc: Christian Borntraeger <borntraeger@de.ibm.com>
Cc: Alexander Graf <agraf@suse.de>
Signed-off-by: Aurelien Jarno <aurelien@aurel32.net>
---
 hw/s390x/virtio-ccw.c | 4 ++++
 target-s390x/cpu.h    | 6 +-----
 2 files changed, 5 insertions(+), 5 deletions(-)

diff --git a/hw/s390x/virtio-ccw.c b/hw/s390x/virtio-ccw.c
index b7a88d6..e32ada9 100644
--- a/hw/s390x/virtio-ccw.c
+++ b/hw/s390x/virtio-ccw.c
@@ -1401,6 +1401,10 @@ static void virtio_ccw_device_plugged(DeviceState *d, Error **errp)
         return;
     }
 
+    if (!kvm_eventfds_enabled()) {
+        dev->flags &= ~VIRTIO_CCW_FLAG_USE_IOEVENTFD;
+    }
+
     sch->id.cu_model = virtio_bus_get_vdev_id(&dev->bus);
 
     css_generate_sch_crws(sch->cssid, sch->ssid, sch->schid,
diff --git a/target-s390x/cpu.h b/target-s390x/cpu.h
index 584e74b..08a79dd 100644
--- a/target-s390x/cpu.h
+++ b/target-s390x/cpu.h
@@ -1214,11 +1214,7 @@ static inline int s390_assign_subch_ioeventfd(EventNotifier *notifier,
                                               uint32_t sch_id, int vq,
                                               bool assign)
 {
-    if (kvm_enabled()) {
-        return kvm_s390_assign_subch_ioeventfd(notifier, sch_id, vq, assign);
-    } else {
-        return -ENOSYS;
-    }
+    return kvm_s390_assign_subch_ioeventfd(notifier, sch_id, vq, assign);
 }
 
 #ifdef CONFIG_KVM
-- 
2.1.4