If NVDIMM option is enabled at machine level, let's allow
NVDIMM plug.

Signed-off-by: Eric Auger <eric.auger@redhat.com>
---
 hw/arm/virt.c | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

diff --git a/hw/arm/virt.c b/hw/arm/virt.c
index 0a04f5ca88..932361fc3f 100644
--- a/hw/arm/virt.c
+++ b/hw/arm/virt.c
@@ -1823,13 +1823,14 @@ static void virt_memory_pre_plug(HotplugHandler *hotplug_dev, DeviceState *dev,
                                  Error **errp)
 {
     const bool is_nvdimm = object_dynamic_cast(OBJECT(dev), TYPE_NVDIMM);
+    MachineState *ms = MACHINE(hotplug_dev);
 
     if (dev->hotplugged) {
         error_setg(errp, "memory hotplug is not supported");
     }
 
-    if (is_nvdimm) {
-        error_setg(errp, "nvdimm is not yet supported");
+    if (is_nvdimm && !ms->acpi_nvdimm_state.is_enabled) {
+        error_setg(errp, "nvdimm is not enabled: missing 'nvdimm' in '-M'");
         return;
     }
 
-- 
2.20.1