Add API to change MR size.
Will be used internally for RAM resize.
Signed-off-by: Michael S. Tsirkin <m...@redhat.com>
---
include/exec/memory.h | 10 ++++++++++
memory.c | 16 ++++++++++++++++
2 files changed, 26 insertions(+)
diff --git a/include/exec/memory.h b/include/exec/memory.h
index f64ab5e..0882221 100644
--- a/include/exec/memory.h
+++ b/include/exec/memory.h
@@ -878,6 +878,16 @@ void memory_region_set_enabled(MemoryRegion *mr, bool
enabled);
void memory_region_set_address(MemoryRegion *mr, hwaddr addr);
/*
+ * memory_region_set_size: dynamically update the size of a region.
+ *
+ * Dynamically updates the size of a region.
+ *
+ * @mr: the region to be updated
+ * @size: used size of the region.
+ */
+void memory_region_set_size(MemoryRegion *mr, uint64_t size);
+
+/*
* memory_region_set_alias_offset: dynamically update a memory alias's offset
*
* Dynamically updates the offset into the target region that an alias points
diff --git a/memory.c b/memory.c
index 15cf9eb..618470b 100644
--- a/memory.c
+++ b/memory.c
@@ -1707,6 +1707,22 @@ void memory_region_set_enabled(MemoryRegion *mr, bool
enabled)
memory_region_transaction_commit();
}
+void memory_region_set_size(MemoryRegion *mr, uint64_t size)
+{
+ Int128 s = int128_make64(size);
+
+ if (size == UINT64_MAX) {
+ s = int128_2_64();
+ }
+ if (int128_eq(s, mr->size)) {
+ return;
+ }
+ memory_region_transaction_begin();
+ mr->size = s;
+ memory_region_update_pending = true;
+ memory_region_transaction_commit();
+}
+
static void memory_region_readd_subregion(MemoryRegion *mr)
{
MemoryRegion *container = mr->container;
--
MST
