Igor Mammedov | 1f07048 | 2014-06-06 17:54:29 +0200 | [diff] [blame] | 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 | */ |
Markus Armbruster | 0b8fa32 | 2019-05-23 16:35:07 +0200 | [diff] [blame] | 12 | |
Peter Maydell | 9c05833 | 2016-01-29 17:49:54 +0000 | [diff] [blame] | 13 | #include "qemu/osdep.h" |
Igor Mammedov | 1f07048 | 2014-06-06 17:54:29 +0200 | [diff] [blame] | 14 | #include "sysemu/hostmem.h" |
Markus Armbruster | da34e65 | 2016-03-14 09:01:28 +0100 | [diff] [blame] | 15 | #include "qapi/error.h" |
Markus Armbruster | 0b8fa32 | 2019-05-23 16:35:07 +0200 | [diff] [blame] | 16 | #include "qemu/module.h" |
Igor Mammedov | 1f07048 | 2014-06-06 17:54:29 +0200 | [diff] [blame] | 17 | #include "qom/object_interfaces.h" |
| 18 | |
Igor Mammedov | 1f07048 | 2014-06-06 17:54:29 +0200 | [diff] [blame] | 19 | static void |
Hu Tao | bd9262d | 2014-06-10 19:15:19 +0800 | [diff] [blame] | 20 | ram_backend_memory_alloc(HostMemoryBackend *backend, Error **errp) |
Igor Mammedov | 1f07048 | 2014-06-06 17:54:29 +0200 | [diff] [blame] | 21 | { |
David Hildenbrand | 7f863cb | 2021-05-10 13:43:18 +0200 | [diff] [blame] | 22 | uint32_t ram_flags; |
Marc-André Lureau | fa0cb34 | 2018-09-12 16:18:00 +0400 | [diff] [blame] | 23 | char *name; |
Igor Mammedov | 1f07048 | 2014-06-06 17:54:29 +0200 | [diff] [blame] | 24 | |
| 25 | if (!backend->size) { |
| 26 | error_setg(errp, "can't create backend with size 0"); |
| 27 | return; |
| 28 | } |
| 29 | |
Marc-André Lureau | fa0cb34 | 2018-09-12 16:18:00 +0400 | [diff] [blame] | 30 | name = host_memory_backend_get_name(backend); |
David Hildenbrand | 7f863cb | 2021-05-10 13:43:18 +0200 | [diff] [blame] | 31 | ram_flags = backend->share ? RAM_SHARED : 0; |
David Hildenbrand | 9181fb7 | 2021-05-10 13:43:23 +0200 | [diff] [blame] | 32 | ram_flags |= backend->reserve ? 0 : RAM_NORESERVE; |
David Hildenbrand | 7f863cb | 2021-05-10 13:43:18 +0200 | [diff] [blame] | 33 | memory_region_init_ram_flags_nomigrate(&backend->mr, OBJECT(backend), name, |
| 34 | backend->size, ram_flags, errp); |
Marc-André Lureau | fa0cb34 | 2018-09-12 16:18:00 +0400 | [diff] [blame] | 35 | g_free(name); |
Igor Mammedov | 1f07048 | 2014-06-06 17:54:29 +0200 | [diff] [blame] | 36 | } |
| 37 | |
| 38 | static void |
| 39 | ram_backend_class_init(ObjectClass *oc, void *data) |
| 40 | { |
Hu Tao | bd9262d | 2014-06-10 19:15:19 +0800 | [diff] [blame] | 41 | HostMemoryBackendClass *bc = MEMORY_BACKEND_CLASS(oc); |
Igor Mammedov | 1f07048 | 2014-06-06 17:54:29 +0200 | [diff] [blame] | 42 | |
Hu Tao | bd9262d | 2014-06-10 19:15:19 +0800 | [diff] [blame] | 43 | bc->alloc = ram_backend_memory_alloc; |
Igor Mammedov | 1f07048 | 2014-06-06 17:54:29 +0200 | [diff] [blame] | 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); |