migration/ram: Add check and info message to nvdimm post copy.

The nvdimm kind memory does not support post copy now.
We disable post copy if we have nvdimm memory and print some
log hint to user.

Signed-off-by: Junyan He <junyan.he@intel.com>
Reviewed-by: Stefan Hajnoczi <stefanha@redhat.com>
Reviewed-by: Igor Mammedov <imammedo@redhat.com>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>

1 files changed, 9 insertions, 0 deletions

diff --git a/migration/ram.c b/migration/ram.c
index 24dea2730c..5beefae7f5 100644
--- a/migration/ram.c
+++ b/migration/ram.c
@@ -3906,6 +3906,15 @@ static int ram_load(QEMUFile *f, void *opaque, int version_id)
 
 static bool ram_has_postcopy(void *opaque)
 {
+    RAMBlock *rb;
+    RAMBLOCK_FOREACH_MIGRATABLE(rb) {
+        if (ramblock_is_pmem(rb)) {
+            info_report("Block: %s, host: %p is a nvdimm memory, postcopy"
+                         "is not supported now!", rb->idstr, rb->host);
+            return false;
+        }
+    }
+
     return migrate_postcopy_ram();
 }