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1f070489 IM |
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 | */ | |
9af23989 | 12 | |
9c058332 | 13 | #include "qemu/osdep.h" |
1f070489 | 14 | #include "sysemu/hostmem.h" |
46517dd4 | 15 | #include "sysemu/sysemu.h" |
6b269967 | 16 | #include "hw/boards.h" |
da34e65c | 17 | #include "qapi/error.h" |
eb815e24 | 18 | #include "qapi/qapi-builtin-visit.h" |
1f070489 | 19 | #include "qapi/visitor.h" |
1f070489 IM |
20 | #include "qemu/config-file.h" |
21 | #include "qom/object_interfaces.h" | |
2b108085 | 22 | #include "qemu/mmap-alloc.h" |
1f070489 | 23 | |
4cf1b76b HT |
24 | #ifdef CONFIG_NUMA |
25 | #include <numaif.h> | |
26 | QEMU_BUILD_BUG_ON(HOST_MEM_POLICY_DEFAULT != MPOL_DEFAULT); | |
27 | QEMU_BUILD_BUG_ON(HOST_MEM_POLICY_PREFERRED != MPOL_PREFERRED); | |
28 | QEMU_BUILD_BUG_ON(HOST_MEM_POLICY_BIND != MPOL_BIND); | |
29 | QEMU_BUILD_BUG_ON(HOST_MEM_POLICY_INTERLEAVE != MPOL_INTERLEAVE); | |
30 | #endif | |
31 | ||
fa0cb34d MAL |
32 | char * |
33 | host_memory_backend_get_name(HostMemoryBackend *backend) | |
34 | { | |
35 | if (!backend->use_canonical_path) { | |
36 | return object_get_canonical_path_component(OBJECT(backend)); | |
37 | } | |
38 | ||
39 | return object_get_canonical_path(OBJECT(backend)); | |
40 | } | |
41 | ||
1f070489 | 42 | static void |
d7bce999 EB |
43 | host_memory_backend_get_size(Object *obj, Visitor *v, const char *name, |
44 | void *opaque, Error **errp) | |
1f070489 IM |
45 | { |
46 | HostMemoryBackend *backend = MEMORY_BACKEND(obj); | |
47 | uint64_t value = backend->size; | |
48 | ||
51e72bc1 | 49 | visit_type_size(v, name, &value, errp); |
1f070489 IM |
50 | } |
51 | ||
52 | static void | |
d7bce999 EB |
53 | host_memory_backend_set_size(Object *obj, Visitor *v, const char *name, |
54 | void *opaque, Error **errp) | |
1f070489 IM |
55 | { |
56 | HostMemoryBackend *backend = MEMORY_BACKEND(obj); | |
57 | Error *local_err = NULL; | |
58 | uint64_t value; | |
59 | ||
6f4c60e4 | 60 | if (host_memory_backend_mr_inited(backend)) { |
21d16836 ZY |
61 | error_setg(&local_err, "cannot change property %s of %s ", |
62 | name, object_get_typename(obj)); | |
1f070489 IM |
63 | goto out; |
64 | } | |
65 | ||
51e72bc1 | 66 | visit_type_size(v, name, &value, &local_err); |
1f070489 IM |
67 | if (local_err) { |
68 | goto out; | |
69 | } | |
70 | if (!value) { | |
21d16836 ZY |
71 | error_setg(&local_err, |
72 | "property '%s' of %s doesn't take value '%" PRIu64 "'", | |
73 | name, object_get_typename(obj), value); | |
1f070489 IM |
74 | goto out; |
75 | } | |
76 | backend->size = value; | |
77 | out: | |
78 | error_propagate(errp, local_err); | |
79 | } | |
80 | ||
4cf1b76b | 81 | static void |
d7bce999 EB |
82 | host_memory_backend_get_host_nodes(Object *obj, Visitor *v, const char *name, |
83 | void *opaque, Error **errp) | |
4cf1b76b HT |
84 | { |
85 | HostMemoryBackend *backend = MEMORY_BACKEND(obj); | |
86 | uint16List *host_nodes = NULL; | |
87 | uint16List **node = &host_nodes; | |
88 | unsigned long value; | |
89 | ||
90 | value = find_first_bit(backend->host_nodes, MAX_NODES); | |
91 | if (value == MAX_NODES) { | |
15160ab7 | 92 | goto ret; |
4cf1b76b HT |
93 | } |
94 | ||
658ae5a7 MA |
95 | *node = g_malloc0(sizeof(**node)); |
96 | (*node)->value = value; | |
97 | node = &(*node)->next; | |
98 | ||
4cf1b76b HT |
99 | do { |
100 | value = find_next_bit(backend->host_nodes, MAX_NODES, value + 1); | |
101 | if (value == MAX_NODES) { | |
102 | break; | |
103 | } | |
104 | ||
658ae5a7 MA |
105 | *node = g_malloc0(sizeof(**node)); |
106 | (*node)->value = value; | |
107 | node = &(*node)->next; | |
4cf1b76b HT |
108 | } while (true); |
109 | ||
15160ab7 | 110 | ret: |
51e72bc1 | 111 | visit_type_uint16List(v, name, &host_nodes, errp); |
4cf1b76b HT |
112 | } |
113 | ||
114 | static void | |
d7bce999 EB |
115 | host_memory_backend_set_host_nodes(Object *obj, Visitor *v, const char *name, |
116 | void *opaque, Error **errp) | |
4cf1b76b HT |
117 | { |
118 | #ifdef CONFIG_NUMA | |
119 | HostMemoryBackend *backend = MEMORY_BACKEND(obj); | |
ffa144b3 | 120 | uint16List *l, *host_nodes = NULL; |
4cf1b76b | 121 | |
ffa144b3 EH |
122 | visit_type_uint16List(v, name, &host_nodes, errp); |
123 | ||
124 | for (l = host_nodes; l; l = l->next) { | |
125 | if (l->value >= MAX_NODES) { | |
126 | error_setg(errp, "Invalid host-nodes value: %d", l->value); | |
127 | goto out; | |
128 | } | |
129 | } | |
4cf1b76b | 130 | |
ffa144b3 | 131 | for (l = host_nodes; l; l = l->next) { |
4cf1b76b | 132 | bitmap_set(backend->host_nodes, l->value, 1); |
4cf1b76b | 133 | } |
ffa144b3 EH |
134 | |
135 | out: | |
136 | qapi_free_uint16List(host_nodes); | |
4cf1b76b HT |
137 | #else |
138 | error_setg(errp, "NUMA node binding are not supported by this QEMU"); | |
139 | #endif | |
140 | } | |
141 | ||
a3590dac DB |
142 | static int |
143 | host_memory_backend_get_policy(Object *obj, Error **errp G_GNUC_UNUSED) | |
4cf1b76b HT |
144 | { |
145 | HostMemoryBackend *backend = MEMORY_BACKEND(obj); | |
a3590dac | 146 | return backend->policy; |
4cf1b76b HT |
147 | } |
148 | ||
149 | static void | |
a3590dac | 150 | host_memory_backend_set_policy(Object *obj, int policy, Error **errp) |
4cf1b76b HT |
151 | { |
152 | HostMemoryBackend *backend = MEMORY_BACKEND(obj); | |
4cf1b76b HT |
153 | backend->policy = policy; |
154 | ||
155 | #ifndef CONFIG_NUMA | |
156 | if (policy != HOST_MEM_POLICY_DEFAULT) { | |
157 | error_setg(errp, "NUMA policies are not supported by this QEMU"); | |
158 | } | |
159 | #endif | |
160 | } | |
161 | ||
605d0a94 PB |
162 | static bool host_memory_backend_get_merge(Object *obj, Error **errp) |
163 | { | |
164 | HostMemoryBackend *backend = MEMORY_BACKEND(obj); | |
165 | ||
166 | return backend->merge; | |
167 | } | |
168 | ||
169 | static void host_memory_backend_set_merge(Object *obj, bool value, Error **errp) | |
170 | { | |
171 | HostMemoryBackend *backend = MEMORY_BACKEND(obj); | |
172 | ||
6f4c60e4 | 173 | if (!host_memory_backend_mr_inited(backend)) { |
605d0a94 PB |
174 | backend->merge = value; |
175 | return; | |
176 | } | |
177 | ||
178 | if (value != backend->merge) { | |
179 | void *ptr = memory_region_get_ram_ptr(&backend->mr); | |
180 | uint64_t sz = memory_region_size(&backend->mr); | |
181 | ||
182 | qemu_madvise(ptr, sz, | |
183 | value ? QEMU_MADV_MERGEABLE : QEMU_MADV_UNMERGEABLE); | |
184 | backend->merge = value; | |
185 | } | |
186 | } | |
187 | ||
188 | static bool host_memory_backend_get_dump(Object *obj, Error **errp) | |
189 | { | |
190 | HostMemoryBackend *backend = MEMORY_BACKEND(obj); | |
191 | ||
192 | return backend->dump; | |
193 | } | |
194 | ||
195 | static void host_memory_backend_set_dump(Object *obj, bool value, Error **errp) | |
196 | { | |
197 | HostMemoryBackend *backend = MEMORY_BACKEND(obj); | |
198 | ||
6f4c60e4 | 199 | if (!host_memory_backend_mr_inited(backend)) { |
605d0a94 PB |
200 | backend->dump = value; |
201 | return; | |
202 | } | |
203 | ||
204 | if (value != backend->dump) { | |
205 | void *ptr = memory_region_get_ram_ptr(&backend->mr); | |
206 | uint64_t sz = memory_region_size(&backend->mr); | |
207 | ||
208 | qemu_madvise(ptr, sz, | |
209 | value ? QEMU_MADV_DODUMP : QEMU_MADV_DONTDUMP); | |
210 | backend->dump = value; | |
211 | } | |
212 | } | |
213 | ||
a35ba7be PB |
214 | static bool host_memory_backend_get_prealloc(Object *obj, Error **errp) |
215 | { | |
216 | HostMemoryBackend *backend = MEMORY_BACKEND(obj); | |
217 | ||
218 | return backend->prealloc || backend->force_prealloc; | |
219 | } | |
220 | ||
221 | static void host_memory_backend_set_prealloc(Object *obj, bool value, | |
222 | Error **errp) | |
223 | { | |
056b68af | 224 | Error *local_err = NULL; |
a35ba7be PB |
225 | HostMemoryBackend *backend = MEMORY_BACKEND(obj); |
226 | ||
227 | if (backend->force_prealloc) { | |
228 | if (value) { | |
229 | error_setg(errp, | |
230 | "remove -mem-prealloc to use the prealloc property"); | |
231 | return; | |
232 | } | |
233 | } | |
234 | ||
6f4c60e4 | 235 | if (!host_memory_backend_mr_inited(backend)) { |
a35ba7be PB |
236 | backend->prealloc = value; |
237 | return; | |
238 | } | |
239 | ||
240 | if (value && !backend->prealloc) { | |
241 | int fd = memory_region_get_fd(&backend->mr); | |
242 | void *ptr = memory_region_get_ram_ptr(&backend->mr); | |
243 | uint64_t sz = memory_region_size(&backend->mr); | |
244 | ||
ffac16fa | 245 | os_mem_prealloc(fd, ptr, sz, backend->prealloc_threads, &local_err); |
056b68af IM |
246 | if (local_err) { |
247 | error_propagate(errp, local_err); | |
248 | return; | |
249 | } | |
a35ba7be PB |
250 | backend->prealloc = true; |
251 | } | |
252 | } | |
253 | ||
ffac16fa IM |
254 | static void host_memory_backend_get_prealloc_threads(Object *obj, Visitor *v, |
255 | const char *name, void *opaque, Error **errp) | |
256 | { | |
257 | HostMemoryBackend *backend = MEMORY_BACKEND(obj); | |
258 | visit_type_uint32(v, name, &backend->prealloc_threads, errp); | |
259 | } | |
260 | ||
261 | static void host_memory_backend_set_prealloc_threads(Object *obj, Visitor *v, | |
262 | const char *name, void *opaque, Error **errp) | |
263 | { | |
264 | HostMemoryBackend *backend = MEMORY_BACKEND(obj); | |
265 | Error *local_err = NULL; | |
266 | uint32_t value; | |
267 | ||
268 | visit_type_uint32(v, name, &value, &local_err); | |
269 | if (local_err) { | |
270 | goto out; | |
271 | } | |
272 | if (value <= 0) { | |
273 | error_setg(&local_err, | |
274 | "property '%s' of %s doesn't take value '%d'", | |
275 | name, object_get_typename(obj), value); | |
276 | goto out; | |
277 | } | |
278 | backend->prealloc_threads = value; | |
279 | out: | |
280 | error_propagate(errp, local_err); | |
281 | } | |
282 | ||
58f4662c | 283 | static void host_memory_backend_init(Object *obj) |
1f070489 | 284 | { |
605d0a94 | 285 | HostMemoryBackend *backend = MEMORY_BACKEND(obj); |
6b269967 | 286 | MachineState *machine = MACHINE(qdev_get_machine()); |
605d0a94 | 287 | |
ffac16fa | 288 | /* TODO: convert access to globals to compat properties */ |
6b269967 EH |
289 | backend->merge = machine_mem_merge(machine); |
290 | backend->dump = machine_dump_guest_core(machine); | |
a35ba7be | 291 | backend->prealloc = mem_prealloc; |
ffac16fa | 292 | backend->prealloc_threads = 1; |
1f070489 IM |
293 | } |
294 | ||
fa0cb34d MAL |
295 | static void host_memory_backend_post_init(Object *obj) |
296 | { | |
297 | object_apply_compat_props(obj); | |
298 | } | |
299 | ||
4728b574 PX |
300 | bool host_memory_backend_mr_inited(HostMemoryBackend *backend) |
301 | { | |
302 | /* | |
303 | * NOTE: We forbid zero-length memory backend, so here zero means | |
304 | * "we haven't inited the backend memory region yet". | |
305 | */ | |
306 | return memory_region_size(&backend->mr) != 0; | |
307 | } | |
308 | ||
7943e97b | 309 | MemoryRegion *host_memory_backend_get_memory(HostMemoryBackend *backend) |
1f070489 | 310 | { |
6f4c60e4 | 311 | return host_memory_backend_mr_inited(backend) ? &backend->mr : NULL; |
1f070489 IM |
312 | } |
313 | ||
2aece63c XG |
314 | void host_memory_backend_set_mapped(HostMemoryBackend *backend, bool mapped) |
315 | { | |
316 | backend->is_mapped = mapped; | |
317 | } | |
318 | ||
319 | bool host_memory_backend_is_mapped(HostMemoryBackend *backend) | |
320 | { | |
321 | return backend->is_mapped; | |
322 | } | |
323 | ||
2b108085 DG |
324 | #ifdef __linux__ |
325 | size_t host_memory_backend_pagesize(HostMemoryBackend *memdev) | |
326 | { | |
327 | Object *obj = OBJECT(memdev); | |
328 | char *path = object_property_get_str(obj, "mem-path", NULL); | |
329 | size_t pagesize = qemu_mempath_getpagesize(path); | |
330 | ||
331 | g_free(path); | |
332 | return pagesize; | |
333 | } | |
334 | #else | |
335 | size_t host_memory_backend_pagesize(HostMemoryBackend *memdev) | |
336 | { | |
038adc2f | 337 | return qemu_real_host_page_size; |
2b108085 DG |
338 | } |
339 | #endif | |
340 | ||
bd9262d9 HT |
341 | static void |
342 | host_memory_backend_memory_complete(UserCreatable *uc, Error **errp) | |
343 | { | |
344 | HostMemoryBackend *backend = MEMORY_BACKEND(uc); | |
345 | HostMemoryBackendClass *bc = MEMORY_BACKEND_GET_CLASS(uc); | |
605d0a94 PB |
346 | Error *local_err = NULL; |
347 | void *ptr; | |
348 | uint64_t sz; | |
bd9262d9 HT |
349 | |
350 | if (bc->alloc) { | |
605d0a94 PB |
351 | bc->alloc(backend, &local_err); |
352 | if (local_err) { | |
056b68af | 353 | goto out; |
605d0a94 PB |
354 | } |
355 | ||
356 | ptr = memory_region_get_ram_ptr(&backend->mr); | |
357 | sz = memory_region_size(&backend->mr); | |
358 | ||
359 | if (backend->merge) { | |
360 | qemu_madvise(ptr, sz, QEMU_MADV_MERGEABLE); | |
361 | } | |
362 | if (!backend->dump) { | |
363 | qemu_madvise(ptr, sz, QEMU_MADV_DONTDUMP); | |
364 | } | |
4cf1b76b HT |
365 | #ifdef CONFIG_NUMA |
366 | unsigned long lastbit = find_last_bit(backend->host_nodes, MAX_NODES); | |
367 | /* lastbit == MAX_NODES means maxnode = 0 */ | |
368 | unsigned long maxnode = (lastbit + 1) % (MAX_NODES + 1); | |
369 | /* ensure policy won't be ignored in case memory is preallocated | |
370 | * before mbind(). note: MPOL_MF_STRICT is ignored on hugepages so | |
371 | * this doesn't catch hugepage case. */ | |
288d3322 | 372 | unsigned flags = MPOL_MF_STRICT | MPOL_MF_MOVE; |
4cf1b76b HT |
373 | |
374 | /* check for invalid host-nodes and policies and give more verbose | |
375 | * error messages than mbind(). */ | |
376 | if (maxnode && backend->policy == MPOL_DEFAULT) { | |
377 | error_setg(errp, "host-nodes must be empty for policy default," | |
378 | " or you should explicitly specify a policy other" | |
379 | " than default"); | |
380 | return; | |
381 | } else if (maxnode == 0 && backend->policy != MPOL_DEFAULT) { | |
382 | error_setg(errp, "host-nodes must be set for policy %s", | |
977c736f | 383 | HostMemPolicy_str(backend->policy)); |
4cf1b76b HT |
384 | return; |
385 | } | |
386 | ||
387 | /* We can have up to MAX_NODES nodes, but we need to pass maxnode+1 | |
388 | * as argument to mbind() due to an old Linux bug (feature?) which | |
389 | * cuts off the last specified node. This means backend->host_nodes | |
390 | * must have MAX_NODES+1 bits available. | |
391 | */ | |
392 | assert(sizeof(backend->host_nodes) >= | |
393 | BITS_TO_LONGS(MAX_NODES + 1) * sizeof(unsigned long)); | |
394 | assert(maxnode <= MAX_NODES); | |
395 | if (mbind(ptr, sz, backend->policy, | |
396 | maxnode ? backend->host_nodes : NULL, maxnode + 1, flags)) { | |
a3567ba1 PF |
397 | if (backend->policy != MPOL_DEFAULT || errno != ENOSYS) { |
398 | error_setg_errno(errp, errno, | |
399 | "cannot bind memory to host NUMA nodes"); | |
400 | return; | |
401 | } | |
4cf1b76b HT |
402 | } |
403 | #endif | |
404 | /* Preallocate memory after the NUMA policy has been instantiated. | |
405 | * This is necessary to guarantee memory is allocated with | |
406 | * specified NUMA policy in place. | |
407 | */ | |
a35ba7be | 408 | if (backend->prealloc) { |
056b68af | 409 | os_mem_prealloc(memory_region_get_fd(&backend->mr), ptr, sz, |
ffac16fa | 410 | backend->prealloc_threads, &local_err); |
056b68af IM |
411 | if (local_err) { |
412 | goto out; | |
413 | } | |
a35ba7be | 414 | } |
bd9262d9 | 415 | } |
056b68af IM |
416 | out: |
417 | error_propagate(errp, local_err); | |
bd9262d9 HT |
418 | } |
419 | ||
36bce5ca | 420 | static bool |
3beacfb9 | 421 | host_memory_backend_can_be_deleted(UserCreatable *uc) |
36bce5ca | 422 | { |
2aece63c | 423 | if (host_memory_backend_is_mapped(MEMORY_BACKEND(uc))) { |
36bce5ca LM |
424 | return false; |
425 | } else { | |
426 | return true; | |
427 | } | |
428 | } | |
429 | ||
06329cce MA |
430 | static bool host_memory_backend_get_share(Object *o, Error **errp) |
431 | { | |
432 | HostMemoryBackend *backend = MEMORY_BACKEND(o); | |
433 | ||
434 | return backend->share; | |
435 | } | |
436 | ||
437 | static void host_memory_backend_set_share(Object *o, bool value, Error **errp) | |
438 | { | |
439 | HostMemoryBackend *backend = MEMORY_BACKEND(o); | |
440 | ||
441 | if (host_memory_backend_mr_inited(backend)) { | |
442 | error_setg(errp, "cannot change property value"); | |
443 | return; | |
444 | } | |
445 | backend->share = value; | |
446 | } | |
447 | ||
fa0cb34d MAL |
448 | static bool |
449 | host_memory_backend_get_use_canonical_path(Object *obj, Error **errp) | |
450 | { | |
451 | HostMemoryBackend *backend = MEMORY_BACKEND(obj); | |
452 | ||
453 | return backend->use_canonical_path; | |
454 | } | |
455 | ||
456 | static void | |
457 | host_memory_backend_set_use_canonical_path(Object *obj, bool value, | |
458 | Error **errp) | |
459 | { | |
460 | HostMemoryBackend *backend = MEMORY_BACKEND(obj); | |
461 | ||
462 | backend->use_canonical_path = value; | |
463 | } | |
464 | ||
bd9262d9 HT |
465 | static void |
466 | host_memory_backend_class_init(ObjectClass *oc, void *data) | |
467 | { | |
468 | UserCreatableClass *ucc = USER_CREATABLE_CLASS(oc); | |
469 | ||
470 | ucc->complete = host_memory_backend_memory_complete; | |
36bce5ca | 471 | ucc->can_be_deleted = host_memory_backend_can_be_deleted; |
e62834ca EH |
472 | |
473 | object_class_property_add_bool(oc, "merge", | |
474 | host_memory_backend_get_merge, | |
475 | host_memory_backend_set_merge, &error_abort); | |
033bfc5e MAL |
476 | object_class_property_set_description(oc, "merge", |
477 | "Mark memory as mergeable", &error_abort); | |
e62834ca EH |
478 | object_class_property_add_bool(oc, "dump", |
479 | host_memory_backend_get_dump, | |
480 | host_memory_backend_set_dump, &error_abort); | |
033bfc5e MAL |
481 | object_class_property_set_description(oc, "dump", |
482 | "Set to 'off' to exclude from core dump", &error_abort); | |
e62834ca EH |
483 | object_class_property_add_bool(oc, "prealloc", |
484 | host_memory_backend_get_prealloc, | |
485 | host_memory_backend_set_prealloc, &error_abort); | |
033bfc5e MAL |
486 | object_class_property_set_description(oc, "prealloc", |
487 | "Preallocate memory", &error_abort); | |
ffac16fa IM |
488 | object_class_property_add(oc, "prealloc-threads", "int", |
489 | host_memory_backend_get_prealloc_threads, | |
490 | host_memory_backend_set_prealloc_threads, | |
491 | NULL, NULL, &error_abort); | |
492 | object_class_property_set_description(oc, "prealloc-threads", | |
493 | "Number of CPU threads to use for prealloc", &error_abort); | |
e62834ca EH |
494 | object_class_property_add(oc, "size", "int", |
495 | host_memory_backend_get_size, | |
496 | host_memory_backend_set_size, | |
497 | NULL, NULL, &error_abort); | |
033bfc5e MAL |
498 | object_class_property_set_description(oc, "size", |
499 | "Size of the memory region (ex: 500M)", &error_abort); | |
e62834ca EH |
500 | object_class_property_add(oc, "host-nodes", "int", |
501 | host_memory_backend_get_host_nodes, | |
502 | host_memory_backend_set_host_nodes, | |
503 | NULL, NULL, &error_abort); | |
033bfc5e MAL |
504 | object_class_property_set_description(oc, "host-nodes", |
505 | "Binds memory to the list of NUMA host nodes", &error_abort); | |
e62834ca | 506 | object_class_property_add_enum(oc, "policy", "HostMemPolicy", |
f7abe0ec | 507 | &HostMemPolicy_lookup, |
e62834ca EH |
508 | host_memory_backend_get_policy, |
509 | host_memory_backend_set_policy, &error_abort); | |
033bfc5e MAL |
510 | object_class_property_set_description(oc, "policy", |
511 | "Set the NUMA policy", &error_abort); | |
06329cce MA |
512 | object_class_property_add_bool(oc, "share", |
513 | host_memory_backend_get_share, host_memory_backend_set_share, | |
514 | &error_abort); | |
033bfc5e MAL |
515 | object_class_property_set_description(oc, "share", |
516 | "Mark the memory as private to QEMU or shared", &error_abort); | |
fa0cb34d MAL |
517 | object_class_property_add_bool(oc, "x-use-canonical-path-for-ramblock-id", |
518 | host_memory_backend_get_use_canonical_path, | |
519 | host_memory_backend_set_use_canonical_path, &error_abort); | |
e1ff3c67 IM |
520 | } |
521 | ||
58f4662c | 522 | static const TypeInfo host_memory_backend_info = { |
1f070489 IM |
523 | .name = TYPE_MEMORY_BACKEND, |
524 | .parent = TYPE_OBJECT, | |
525 | .abstract = true, | |
526 | .class_size = sizeof(HostMemoryBackendClass), | |
bd9262d9 | 527 | .class_init = host_memory_backend_class_init, |
1f070489 | 528 | .instance_size = sizeof(HostMemoryBackend), |
58f4662c | 529 | .instance_init = host_memory_backend_init, |
fa0cb34d | 530 | .instance_post_init = host_memory_backend_post_init, |
1f070489 IM |
531 | .interfaces = (InterfaceInfo[]) { |
532 | { TYPE_USER_CREATABLE }, | |
533 | { } | |
534 | } | |
535 | }; | |
536 | ||
537 | static void register_types(void) | |
538 | { | |
58f4662c | 539 | type_register_static(&host_memory_backend_info); |
1f070489 IM |
540 | } |
541 | ||
542 | type_init(register_types); |