diff options
| -rw-r--r-- | include/exec/memory.h | 1 | ||||
| -rw-r--r-- | softmmu/memory.c | 13 |
2 files changed, 13 insertions, 1 deletions
diff --git a/include/exec/memory.h b/include/exec/memory.h index 20f1b27..fea1a49 100644 --- a/include/exec/memory.h +++ b/include/exec/memory.h @@ -738,6 +738,7 @@ struct MemoryRegion { const MemoryRegionOps *ops; void *opaque; MemoryRegion *container; + int mapped_via_alias; /* Mapped via an alias, container might be NULL */ Int128 size; hwaddr addr; void (*destructor)(MemoryRegion *mr); diff --git a/softmmu/memory.c b/softmmu/memory.c index 5e69624..e37a4b8 100644 --- a/softmmu/memory.c +++ b/softmmu/memory.c @@ -2545,8 +2545,13 @@ static void memory_region_add_subregion_common(MemoryRegion *mr, hwaddr offset, MemoryRegion *subregion) { + MemoryRegion *alias; + assert(!subregion->container); subregion->container = mr; + for (alias = subregion->alias; alias; alias = alias->alias) { + alias->mapped_via_alias++; + } subregion->addr = offset; memory_region_update_container_subregions(subregion); } @@ -2571,9 +2576,15 @@ void memory_region_add_subregion_overlap(MemoryRegion *mr, void memory_region_del_subregion(MemoryRegion *mr, MemoryRegion *subregion) { + MemoryRegion *alias; + memory_region_transaction_begin(); assert(subregion->container == mr); subregion->container = NULL; + for (alias = subregion->alias; alias; alias = alias->alias) { + alias->mapped_via_alias--; + assert(alias->mapped_via_alias >= 0); + } QTAILQ_REMOVE(&mr->subregions, subregion, subregions_link); memory_region_unref(subregion); memory_region_update_pending |= mr->enabled && subregion->enabled; @@ -2670,7 +2681,7 @@ static FlatRange *flatview_lookup(FlatView *view, AddrRange addr) bool memory_region_is_mapped(MemoryRegion *mr) { - return mr->container ? true : false; + return !!mr->container || mr->mapped_via_alias; } /* Same as memory_region_find, but it does not add a reference to the |