@@ -848,6 +848,14 @@ void memory_region_set_alias_offset(MemoryRegion *mr,
bool memory_region_present(MemoryRegion *parent, hwaddr addr);
/**
+ * memory_region_is_mapped: returns true if #MemoryRegion is mapped
+ * into any address space.
+ *
+ * @mr: a #MemoryRegion which should be checked if it's mapped
+ */
+bool memory_region_is_mapped(MemoryRegion *mr);
+
+/**
* memory_region_find: translate an address/size relative to a
* MemoryRegion into a #MemoryRegionSection.
*
@@ -492,7 +492,7 @@ static AddressSpace *memory_region_to_address_space(MemoryRegion *mr)
return as;
}
}
- abort();
+ return NULL;
}
/* Render a memory region into the global view. Ranges in @view obscure
@@ -1569,6 +1569,16 @@ bool memory_region_present(MemoryRegion *parent, hwaddr addr)
return true;
}
+bool memory_region_is_mapped(MemoryRegion *mr)
+{
+ mr = memory_region_find(mr, 0, 1).mr;
+ if (!mr) {
+ return false;
+ }
+ memory_region_unref(mr);
+ return true;
+}
+
MemoryRegionSection memory_region_find(MemoryRegion *mr,
hwaddr addr, uint64_t size)
{
@@ -1586,6 +1596,9 @@ MemoryRegionSection memory_region_find(MemoryRegion *mr,
}
as = memory_region_to_address_space(root);
+ if (!as) {
+ return ret;
+ }
range = addrrange_make(int128_make64(addr), int128_make64(size));
view = address_space_get_flatview(as);
which allows to check if MemoryRegion is already mapped. Signed-off-by: Igor Mammedov <imammedo@redhat.com> --- include/exec/memory.h | 8 ++++++++ memory.c | 15 ++++++++++++++- 2 files changed, 22 insertions(+), 1 deletions(-)