qemu

FORK: QEMU emulator
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hostmem-ram.c (1409B)

      1 /*
      2  * QEMU Host Memory Backend
      3  *
      4  * Copyright (C) 2013-2014 Red Hat Inc
      5  *
      6  * Authors:
      7  *   Igor Mammedov <imammedo@redhat.com>
      8  *
      9  * This work is licensed under the terms of the GNU GPL, version 2 or later.
     10  * See the COPYING file in the top-level directory.
     11  */
     12 
     13 #include "qemu/osdep.h"
     14 #include "sysemu/hostmem.h"
     15 #include "qapi/error.h"
     16 #include "qemu/module.h"
     17 #include "qom/object_interfaces.h"
     18 
     19 static void
     20 ram_backend_memory_alloc(HostMemoryBackend *backend, Error **errp)
     21 {
     22     uint32_t ram_flags;
     23     char *name;
     24 
     25     if (!backend->size) {
     26         error_setg(errp, "can't create backend with size 0");
     27         return;
     28     }
     29 
     30     name = host_memory_backend_get_name(backend);
     31     ram_flags = backend->share ? RAM_SHARED : 0;
     32     ram_flags |= backend->reserve ? 0 : RAM_NORESERVE;
     33     memory_region_init_ram_flags_nomigrate(&backend->mr, OBJECT(backend), name,
     34                                            backend->size, ram_flags, errp);
     35     g_free(name);
     36 }
     37 
     38 static void
     39 ram_backend_class_init(ObjectClass *oc, void *data)
     40 {
     41     HostMemoryBackendClass *bc = MEMORY_BACKEND_CLASS(oc);
     42 
     43     bc->alloc = ram_backend_memory_alloc;
     44 }
     45 
     46 static const TypeInfo ram_backend_info = {
     47     .name = TYPE_MEMORY_BACKEND_RAM,
     48     .parent = TYPE_MEMORY_BACKEND,
     49     .class_init = ram_backend_class_init,
     50 };
     51 
     52 static void register_types(void)
     53 {
     54     type_register_static(&ram_backend_info);
     55 }
     56 
     57 type_init(register_types);