To allow devices to dynamically resize the device. The motivation is
to allow devices with variable size to init their memory_region
without size early and then correctly populate size at realize() time.
Signed-off-by: Peter Crosthwaite <peter.crosthwa...@xilinx.com>
---
memory.c | 38 ++++++++++++++++++++++++++++++++++++++
1 file changed, 38 insertions(+)
diff --git a/memory.c b/memory.c
index e1236c1..2ff9ab7 100644
--- a/memory.c
+++ b/memory.c
@@ -949,6 +949,40 @@ static void memory_region_set_may_overlap(Object *obj,
bool value, Error **errp)
}
}
+static void memory_region_get_size(Object *obj, Visitor *v, void *opaque,
+ const char *name, Error **errp)
+{
+ MemoryRegion *mr = MEMORY_REGION(obj);
+ Error *local_err = NULL;
+ uint64_t value = int128_get64(mr->size);
+
+ visit_type_uint64(v, &value, name, &local_err);
+ if (local_err) {
+ error_propagate(errp, local_err);
+ }
+}
+
+static void memory_region_set_size(Object *obj, Visitor *v, void *opaque,
+ const char *name, Error **errp)
+{
+ MemoryRegion *mr = MEMORY_REGION(obj);
+ Error *local_err = NULL;
+ uint64_t value;
+ Int128 v128;
+
+ visit_type_uint64(v, &value, name, &local_err);
+ v128 = int128_make64(value);
+ if (local_err) {
+ error_propagate(errp, local_err);
+ return;
+ }
+
+ if (!int128_eq(v128, mr->size)) {
+ mr->size = v128;
+ memory_region_readd_subregion(mr);
+ }
+}
+
static void memory_region_initfn(Object *obj)
{
MemoryRegion *mr = MEMORY_REGION(obj);
@@ -978,6 +1012,10 @@ static void memory_region_initfn(Object *obj)
memory_region_get_may_overlap,
memory_region_set_may_overlap,
&error_abort);
+ object_property_add(OBJECT(mr), "size", "uint64",
+ memory_region_get_size,
+ memory_region_set_size,
+ NULL, NULL, &error_abort);
}
static uint64_t unassigned_mem_read(void *opaque, hwaddr addr,
--
1.9.3.1.ga73a6ad
