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hostmem: use object id for memory region name with >= 4.0

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hostmem-file and hostmem-memfd use the whole object path for the
memory region name, and hostname-ram uses only the path component (the
object id, or canonical path basename):

qemu -m 1024 -object memory-backend-file,id=mem,size=1G,mem-path=/tmp/foo -numa node,memdev=mem -monitor stdio
(qemu) info ramblock
              Block Name    PSize              Offset               Used              Total
            /objects/mem    4 KiB  0x0000000000000000 0x0000000040000000 0x0000000040000000

qemu -m 1024 -object memory-backend-memfd,id=mem,size=1G -numa node,memdev=mem -monitor stdio
(qemu) info ramblock
              Block Name    PSize              Offset               Used              Total
            /objects/mem    4 KiB  0x0000000000000000 0x0000000040000000 0x0000000040000000

qemu -m 1024 -object memory-backend-ram,id=mem,size=1G -numa node,memdev=mem -monitor stdio
(qemu) info ramblock
              Block Name    PSize              Offset               Used              Total
                     mem    4 KiB  0x0000000000000000 0x0000000040000000 0x0000000040000000

For consistency, change to use object id for -file and -memfd as well
with >= 4.0.

Having a consistent naming allows to migrate to different hostmem
backends.

Signed-off-by: Marc-André Lureau <marcandre.lureau@redhat.com>
Reviewed-by: Igor Mammedov <imammedo@redhat.com>
Acked-by: Eduardo Habkost <ehabkost@redhat.com>
This commit is contained in:
Marc-André Lureau 2018-09-12 16:18:00 +04:00
parent 51e5ef459e
commit fa0cb34d22
6 changed files with 55 additions and 11 deletions
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3
include/sysemu/hostmem.h
View file

@ -53,7 +53,7 @@ struct HostMemoryBackend {
/* protected */
uint64_t size;
bool merge, dump;
bool merge, dump, use_canonical_path;
bool prealloc, force_prealloc, is_mapped, share;
DECLARE_BITMAP(host_nodes, MAX_NODES + 1);
HostMemPolicy policy;
@ -67,5 +67,6 @@ MemoryRegion *host_memory_backend_get_memory(HostMemoryBackend *backend);
void host_memory_backend_set_mapped(HostMemoryBackend *backend, bool mapped);
bool host_memory_backend_is_mapped(HostMemoryBackend *backend);
size_t host_memory_backend_pagesize(HostMemoryBackend *memdev);
char *host_memory_backend_get_name(HostMemoryBackend *backend);
#endif