Commit 803c0816 authored by Paolo Bonzini's avatar Paolo Bonzini
Browse files

memory: add getter for owner 



Whenever memory regions are accessed outside the BQL, they need to be
preserved against hot-unplug.  MemoryRegions actually do not have their
own reference count; they piggyback on a QOM object, their "owner".
The owner is set at creation time, and there is a function to retrieve
the owner.

Signed-off-by: default avatarPaolo Bonzini <pbonzini@redhat.com>
parent b7e95164

include/exec/memory.h

+7 −0
Original line number Diff line number Diff line
@@ -381,6 +381,13 @@ void memory_region_init_iommu(MemoryRegion *mr, 
 */

void memory_region_destroy(MemoryRegion *mr);



/**

 * memory_region_owner: get a memory region's owner.

 *

 * @mr: the memory region being queried.

 */

struct Object *memory_region_owner(MemoryRegion *mr);



/**

 * memory_region_size: get a memory region's size.

 *

memory.c

+6 −0
Original line number Diff line number Diff line
@@ -738,6 +738,7 @@ void memory_region_init(MemoryRegion *mr, 
    mr->owner = owner;

    mr->iommu_ops = NULL;

    mr->parent = NULL;

    mr->owner = NULL;

    mr->size = int128_make64(size);

    if (size == UINT64_MAX) {

        mr->size = int128_2_64();
@@ -1013,6 +1014,11 @@ void memory_region_destroy(MemoryRegion *mr) 
    g_free(mr->ioeventfds);

}



Object *memory_region_owner(MemoryRegion *mr)

{

    return mr->owner;

}



uint64_t memory_region_size(MemoryRegion *mr)

{

    if (int128_eq(mr->size, int128_2_64())) {