using the same memdev backend more than once will cause
assersion at MemoryRegion mapping time becase it's already
mapped. Prevent it by checking that associated MemoryRegion
is not mapped.
Signed-off-by: Igor Mammedov <imamm...@redhat.com>
---
hw/mem/dimm.c | 17 ++++++++++++++++-
1 files changed, 16 insertions(+), 1 deletions(-)
diff --git a/hw/mem/dimm.c b/hw/mem/dimm.c
index bb81679..713ded5 100644
--- a/hw/mem/dimm.c
+++ b/hw/mem/dimm.c
@@ -42,6 +42,21 @@ static void dimm_get_size(Object *obj, Visitor *v, void
*opaque,
visit_type_int(v, &value, name, errp);
}
+static void dimm_check_memdev_is_busy(Object *obj, const char *name,
+ Object *val, Error **errp)
+{
+ MemoryRegion *mr;
+
+ mr = host_memory_backend_get_memory(MEMORY_BACKEND(val), errp);
+ if (memory_region_is_mapped(mr)) {
+ char *path = object_get_canonical_path_component(val);
+ error_setg(errp, "can't use already busy memdev: %s", path);
+ g_free(path);
+ } else {
+ qdev_prop_allow_set_link_before_realize(obj, name, val, errp);
+ }
+}
+
static void dimm_initfn(Object *obj)
{
DimmDevice *dimm = DIMM(obj);
@@ -50,7 +65,7 @@ static void dimm_initfn(Object *obj)
NULL, NULL, NULL, &error_abort);
object_property_add_link(obj, DIMM_MEMDEV_PROP, TYPE_MEMORY_BACKEND,
(Object **)&dimm->hostmem,
- qdev_prop_allow_set_link_before_realize,
+ dimm_check_memdev_is_busy,
OBJ_PROP_LINK_UNREF_ON_RELEASE,
&error_abort);
}
--
1.7.1
