[Qemu-devel] [PATCH] s390: deprecate the non-ccw machine in 2.5

[Christian Borntraeger <borntraeger@de.ibm.com>]

The non-ccw machine for s390 (s390-virtio) is not very well maintained
and caused several issues in the past:
- aliases like virtio-blk did not work for s390
- virtio refactoring failed due to long standing bugs (e.g.see commit
  cb927b8a "s390-virtio: Accommodate guests using virtqueues too early")
- some features like memory hotplug will cause trouble due to virtio storage
  being above guest memory
- the boot loader bios no longer seems to work. the source code of that
  loader is also no longer maintained

2.4 changed the default to the ccw machine, let's deprecate the old
machine for 2.5.

Signed-off-by: Christian Borntraeger <borntraeger@de.ibm.com>
Acked-by: David Hildenbrand <dahi@linux.vnet.ibm.com>
---
 hw/s390x/s390-virtio.c | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/hw/s390x/s390-virtio.c b/hw/s390x/s390-virtio.c
index e4000c9..7d95cfd 100644
--- a/hw/s390x/s390-virtio.c
+++ b/hw/s390x/s390-virtio.c
@@ -266,6 +266,9 @@ static void s390_init(MachineState *machine)
     hwaddr virtio_region_len;
     hwaddr virtio_region_start;
 
+    error_report("WARNING\nThe s390-virtio machine (non-ccw) is deprecated.\n"
+                 "It will be removed in 2.6. Please use s390-ccw-virtio");
+
     if (machine->ram_slots) {
         error_report("Memory hotplug not supported by the selected machine.");
         exit(EXIT_FAILURE);
@@ -320,7 +323,7 @@ static void s390_machine_class_init(ObjectClass *oc, void *data)
 
     mc->name = "s390-virtio";
     mc->alias = "s390";
-    mc->desc = "VirtIO based S390 machine";
+    mc->desc = "VirtIO based S390 machine (deprecated)";
     mc->init = s390_init;
     mc->block_default_type = IF_VIRTIO;
     mc->max_cpus = 255;
-- 
2.3.0