hw/arm/virt: Disable memory hotplug when MTE is enabled

When MTE is enabled, tag memory must exist for all RAM.

It might be possible to simultaneously hot plug tag memory
alongside the corresponding normal memory, but for now just
disable hotplug.

Signed-off-by: Richard Henderson <[email protected]>
Message-id: [email protected]
Reviewed-by: Peter Maydell <[email protected]>
Signed-off-by: Peter Maydell <[email protected]>

Author: rth7680

hw/arm/virt.c

@@ -2194,6 +2194,11 @@ static void virt_memory_pre_plug(HotplugHandler *hotplug_dev, DeviceState *dev,
         return;
     }
 
+    if (vms->mte) {
+        error_setg(errp, "memory hotplug is not enabled: MTE is enabled");
+        return;
+    }
+
     if (is_nvdimm && !ms->nvdimms_state->is_enabled) {
         error_setg(errp, "nvdimm is not enabled: add 'nvdimm=on' to '-M'");
         return;