static void memory_region_update_container_subregions(MemoryRegion *subregion) { hwaddr offset = subregion->addr; MemoryRegion *mr = subregion->container; MemoryRegion *other; memory_region_transaction_begin(); memory_region_ref(subregion); QTAILQ_FOREACH(other, &mr->subregions, subregions_link) { if (subregion->may_overlap || other->may_overlap) { continue; } if (int128_ge(int128_make64(offset), int128_add(int128_make64(other->addr), other->size)) || int128_le(int128_add(int128_make64(offset), subregion->size), int128_make64(other->addr))) { continue; } #if 0 printf("warning: subregion collision %llx/%llx (%s) " "vs %llx/%llx (%s)\n", (unsigned long long)offset, (unsigned long long)int128_get64(subregion->size), subregion->name, (unsigned long long)other->addr, (unsigned long long)int128_get64(other->size), other->name); #endif } QTAILQ_FOREACH(other, &mr->subregions, subregions_link) { if (subregion->priority >= other->priority) { QTAILQ_INSERT_BEFORE(other, subregion, subregions_link); goto done; } } QTAILQ_INSERT_TAIL(&mr->subregions, subregion, subregions_link); done: memory_region_update_pending |= mr->enabled && subregion->enabled; memory_region_transaction_commit(); }