No need for kvm_enabled() as this function is only called from KVM and
there is no reason why it shouldn't be allowed for tcg. It is simply not
available under tcg.

Also, there is no need to check for the machine type anymore. Just like
ri_enabled(), we can directly use the stored flag, which results in
"true" for the "none" machine.

Signed-off-by: David Hildenbrand <david@redhat.com>
---
 hw/s390x/s390-virtio-ccw.c | 14 ++------------
 1 file changed, 2 insertions(+), 12 deletions(-)

diff --git a/hw/s390x/s390-virtio-ccw.c b/hw/s390x/s390-virtio-ccw.c
index 3a674f5..3e9b455 100644
--- a/hw/s390x/s390-virtio-ccw.c
+++ b/hw/s390x/s390-virtio-ccw.c
@@ -288,18 +288,8 @@ bool cpu_model_allowed(void)
 
 bool gs_allowed(void)
 {
-    if (kvm_enabled()) {
-        MachineClass *mc = MACHINE_GET_CLASS(qdev_get_machine());
-        if (object_class_dynamic_cast(OBJECT_CLASS(mc),
-                                      TYPE_S390_CCW_MACHINE)) {
-            S390CcwMachineClass *s390mc = S390_MACHINE_CLASS(mc);
-
-            return s390mc->gs_allowed;
-        }
-        /* Make sure the "none" machine can have gs */
-        return true;
-    }
-    return false;
+    /* for "none" machine this results in true */
+    return get_machine_class()->gs_allowed;
 }
 
 static char *machine_get_loadparm(Object *obj, Error **errp)
-- 
2.9.4

On 18.08.2017 13:43, David Hildenbrand wrote:
> No need for kvm_enabled() as this function is only called from KVM and
> there is no reason why it shouldn't be allowed for tcg. It is simply not
> available under tcg.
> 
> Also, there is no need to check for the machine type anymore. Just like
> ri_enabled(), we can directly use the stored flag, which results in
> "true" for the "none" machine.
> 
> Signed-off-by: David Hildenbrand <david@redhat.com>
> ---
>  hw/s390x/s390-virtio-ccw.c | 14 ++------------
>  1 file changed, 2 insertions(+), 12 deletions(-)

Reviewed-by: Thomas Huth <thuth@redhat.com>