diff options
| -rw-r--r-- | include/exec/memory.h | 24 | ||||
| -rw-r--r-- | memory.c | 17 |
2 files changed, 41 insertions, 0 deletions
diff --git a/include/exec/memory.h b/include/exec/memory.h index 0882221395..0cd96b152e 100644 --- a/include/exec/memory.h +++ b/include/exec/memory.h @@ -321,6 +321,30 @@ void memory_region_init_ram(MemoryRegion *mr, uint64_t size, Error **errp); +/** + * memory_region_init_resizeable_ram: Initialize memory region with resizeable + * RAM. Accesses into the region will + * modify memory directly. Only an initial + * portion of this RAM is actually used. + * The used size can change across reboots. + * + * @mr: the #MemoryRegion to be initialized. + * @owner: the object that tracks the region's reference count + * @name: the name of the region. + * @size: used size of the region. + * @max_size: max size of the region. + * @resized: callback to notify owner about used size change. + * @errp: pointer to Error*, to store an error if it happens. + */ +void memory_region_init_resizeable_ram(MemoryRegion *mr, + struct Object *owner, + const char *name, + uint64_t size, + uint64_t max_size, + void (*resized)(const char*, + uint64_t length, + void *host), + Error **errp); #ifdef __linux__ /** * memory_region_init_ram_from_file: Initialize RAM memory region with a diff --git a/memory.c b/memory.c index 618470bc4f..c343bf37df 100644 --- a/memory.c +++ b/memory.c @@ -1152,6 +1152,23 @@ void memory_region_init_ram(MemoryRegion *mr, mr->ram_addr = qemu_ram_alloc(size, mr, errp); } +void memory_region_init_resizeable_ram(MemoryRegion *mr, + Object *owner, + const char *name, + uint64_t size, + uint64_t max_size, + void (*resized)(const char*, + uint64_t length, + void *host), + Error **errp) +{ + memory_region_init(mr, owner, name, size); + mr->ram = true; + mr->terminates = true; + mr->destructor = memory_region_destructor_ram; + mr->ram_addr = qemu_ram_alloc_resizeable(size, max_size, resized, mr, errp); +} + #ifdef __linux__ void memory_region_init_ram_from_file(MemoryRegion *mr, struct Object *owner, |