From: David Hildenbrand <david@redhat.com>

Set the new default to "auto", keeping it set to "off" for compat
machines. This property is only available for x86 targets.

Reviewed-by: Michal Privoznik <mprivozn@redhat.com>
Reviewed-by: Pankaj Gupta <pankaj.gupta@ionos.com>
Signed-off-by: David Hildenbrand <david@redhat.com>
Message-Id: <20211217134039.29670-4-david@redhat.com>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
---
 hw/i386/pc.c           | 4 +++-
 hw/virtio/virtio-mem.c | 2 +-
 2 files changed, 4 insertions(+), 2 deletions(-)

diff --git a/hw/i386/pc.c b/hw/i386/pc.c
index 959efa5b3f..718ab81ba8 100644
--- a/hw/i386/pc.c
+++ b/hw/i386/pc.c
@@ -95,7 +95,9 @@
 #include "trace.h"
 #include CONFIG_DEVICES
 
-GlobalProperty pc_compat_6_2[] = {};
+GlobalProperty pc_compat_6_2[] = {
+    { "virtio-mem", "unplugged-inaccessible", "off" },
+};
 const size_t pc_compat_6_2_len = G_N_ELEMENTS(pc_compat_6_2);
 
 GlobalProperty pc_compat_6_1[] = {
diff --git a/hw/virtio/virtio-mem.c b/hw/virtio/virtio-mem.c
index fb6687d4c7..04c223b0c9 100644
--- a/hw/virtio/virtio-mem.c
+++ b/hw/virtio/virtio-mem.c
@@ -1201,7 +1201,7 @@ static Property virtio_mem_properties[] = {
                      TYPE_MEMORY_BACKEND, HostMemoryBackend *),
 #if defined(VIRTIO_MEM_HAS_LEGACY_GUESTS)
     DEFINE_PROP_ON_OFF_AUTO(VIRTIO_MEM_UNPLUGGED_INACCESSIBLE_PROP, VirtIOMEM,
-                            unplugged_inaccessible, ON_OFF_AUTO_OFF),
+                            unplugged_inaccessible, ON_OFF_AUTO_AUTO),
 #endif
     DEFINE_PROP_END_OF_LIST(),
 };
-- 
MST