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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" |
6b269967 | 15 | #include "hw/boards.h" |
da34e65c | 16 | #include "qapi/error.h" |
eb815e24 | 17 | #include "qapi/qapi-builtin-visit.h" |
1f070489 | 18 | #include "qapi/visitor.h" |
1f070489 IM |
19 | #include "qemu/config-file.h" |
20 | #include "qom/object_interfaces.h" | |
2b108085 | 21 | #include "qemu/mmap-alloc.h" |
b85ea5fa | 22 | #include "qemu/madvise.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) { | |
7a309cc9 | 36 | return g_strdup(object_get_canonical_path_component(OBJECT(backend))); |
fa0cb34d MAL |
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); | |
1f070489 IM |
57 | uint64_t value; |
58 | ||
6f4c60e4 | 59 | if (host_memory_backend_mr_inited(backend)) { |
dcfe4805 MA |
60 | error_setg(errp, "cannot change property %s of %s ", name, |
61 | object_get_typename(obj)); | |
62 | return; | |
1f070489 IM |
63 | } |
64 | ||
668f62ec | 65 | if (!visit_type_size(v, name, &value, errp)) { |
dcfe4805 | 66 | return; |
1f070489 IM |
67 | } |
68 | if (!value) { | |
dcfe4805 | 69 | error_setg(errp, |
21d16836 ZY |
70 | "property '%s' of %s doesn't take value '%" PRIu64 "'", |
71 | name, object_get_typename(obj), value); | |
dcfe4805 | 72 | return; |
1f070489 IM |
73 | } |
74 | backend->size = value; | |
1f070489 IM |
75 | } |
76 | ||
4cf1b76b | 77 | static void |
d7bce999 EB |
78 | host_memory_backend_get_host_nodes(Object *obj, Visitor *v, const char *name, |
79 | void *opaque, Error **errp) | |
4cf1b76b HT |
80 | { |
81 | HostMemoryBackend *backend = MEMORY_BACKEND(obj); | |
82 | uint16List *host_nodes = NULL; | |
c3033fd3 | 83 | uint16List **tail = &host_nodes; |
4cf1b76b HT |
84 | unsigned long value; |
85 | ||
86 | value = find_first_bit(backend->host_nodes, MAX_NODES); | |
87 | if (value == MAX_NODES) { | |
15160ab7 | 88 | goto ret; |
4cf1b76b HT |
89 | } |
90 | ||
c3033fd3 | 91 | QAPI_LIST_APPEND(tail, value); |
658ae5a7 | 92 | |
4cf1b76b HT |
93 | do { |
94 | value = find_next_bit(backend->host_nodes, MAX_NODES, value + 1); | |
95 | if (value == MAX_NODES) { | |
96 | break; | |
97 | } | |
98 | ||
c3033fd3 | 99 | QAPI_LIST_APPEND(tail, value); |
4cf1b76b HT |
100 | } while (true); |
101 | ||
15160ab7 | 102 | ret: |
51e72bc1 | 103 | visit_type_uint16List(v, name, &host_nodes, errp); |
bdd5ce05 | 104 | qapi_free_uint16List(host_nodes); |
4cf1b76b HT |
105 | } |
106 | ||
107 | static void | |
d7bce999 EB |
108 | host_memory_backend_set_host_nodes(Object *obj, Visitor *v, const char *name, |
109 | void *opaque, Error **errp) | |
4cf1b76b HT |
110 | { |
111 | #ifdef CONFIG_NUMA | |
112 | HostMemoryBackend *backend = MEMORY_BACKEND(obj); | |
ffa144b3 | 113 | uint16List *l, *host_nodes = NULL; |
4cf1b76b | 114 | |
ffa144b3 EH |
115 | visit_type_uint16List(v, name, &host_nodes, errp); |
116 | ||
117 | for (l = host_nodes; l; l = l->next) { | |
118 | if (l->value >= MAX_NODES) { | |
119 | error_setg(errp, "Invalid host-nodes value: %d", l->value); | |
120 | goto out; | |
121 | } | |
122 | } | |
4cf1b76b | 123 | |
ffa144b3 | 124 | for (l = host_nodes; l; l = l->next) { |
4cf1b76b | 125 | bitmap_set(backend->host_nodes, l->value, 1); |
4cf1b76b | 126 | } |
ffa144b3 EH |
127 | |
128 | out: | |
129 | qapi_free_uint16List(host_nodes); | |
4cf1b76b HT |
130 | #else |
131 | error_setg(errp, "NUMA node binding are not supported by this QEMU"); | |
132 | #endif | |
133 | } | |
134 | ||
a3590dac DB |
135 | static int |
136 | host_memory_backend_get_policy(Object *obj, Error **errp G_GNUC_UNUSED) | |
4cf1b76b HT |
137 | { |
138 | HostMemoryBackend *backend = MEMORY_BACKEND(obj); | |
a3590dac | 139 | return backend->policy; |
4cf1b76b HT |
140 | } |
141 | ||
142 | static void | |
a3590dac | 143 | host_memory_backend_set_policy(Object *obj, int policy, Error **errp) |
4cf1b76b HT |
144 | { |
145 | HostMemoryBackend *backend = MEMORY_BACKEND(obj); | |
4cf1b76b HT |
146 | backend->policy = policy; |
147 | ||
148 | #ifndef CONFIG_NUMA | |
149 | if (policy != HOST_MEM_POLICY_DEFAULT) { | |
150 | error_setg(errp, "NUMA policies are not supported by this QEMU"); | |
151 | } | |
152 | #endif | |
153 | } | |
154 | ||
605d0a94 PB |
155 | static bool host_memory_backend_get_merge(Object *obj, Error **errp) |
156 | { | |
157 | HostMemoryBackend *backend = MEMORY_BACKEND(obj); | |
158 | ||
159 | return backend->merge; | |
160 | } | |
161 | ||
162 | static void host_memory_backend_set_merge(Object *obj, bool value, Error **errp) | |
163 | { | |
164 | HostMemoryBackend *backend = MEMORY_BACKEND(obj); | |
165 | ||
6f4c60e4 | 166 | if (!host_memory_backend_mr_inited(backend)) { |
605d0a94 PB |
167 | backend->merge = value; |
168 | return; | |
169 | } | |
170 | ||
171 | if (value != backend->merge) { | |
172 | void *ptr = memory_region_get_ram_ptr(&backend->mr); | |
173 | uint64_t sz = memory_region_size(&backend->mr); | |
174 | ||
175 | qemu_madvise(ptr, sz, | |
176 | value ? QEMU_MADV_MERGEABLE : QEMU_MADV_UNMERGEABLE); | |
177 | backend->merge = value; | |
178 | } | |
179 | } | |
180 | ||
181 | static bool host_memory_backend_get_dump(Object *obj, Error **errp) | |
182 | { | |
183 | HostMemoryBackend *backend = MEMORY_BACKEND(obj); | |
184 | ||
185 | return backend->dump; | |
186 | } | |
187 | ||
188 | static void host_memory_backend_set_dump(Object *obj, bool value, Error **errp) | |
189 | { | |
190 | HostMemoryBackend *backend = MEMORY_BACKEND(obj); | |
191 | ||
6f4c60e4 | 192 | if (!host_memory_backend_mr_inited(backend)) { |
605d0a94 PB |
193 | backend->dump = value; |
194 | return; | |
195 | } | |
196 | ||
197 | if (value != backend->dump) { | |
198 | void *ptr = memory_region_get_ram_ptr(&backend->mr); | |
199 | uint64_t sz = memory_region_size(&backend->mr); | |
200 | ||
201 | qemu_madvise(ptr, sz, | |
202 | value ? QEMU_MADV_DODUMP : QEMU_MADV_DONTDUMP); | |
203 | backend->dump = value; | |
204 | } | |
205 | } | |
206 | ||
a35ba7be PB |
207 | static bool host_memory_backend_get_prealloc(Object *obj, Error **errp) |
208 | { | |
209 | HostMemoryBackend *backend = MEMORY_BACKEND(obj); | |
210 | ||
4ebc74db | 211 | return backend->prealloc; |
a35ba7be PB |
212 | } |
213 | ||
214 | static void host_memory_backend_set_prealloc(Object *obj, bool value, | |
215 | Error **errp) | |
216 | { | |
056b68af | 217 | Error *local_err = NULL; |
a35ba7be PB |
218 | HostMemoryBackend *backend = MEMORY_BACKEND(obj); |
219 | ||
9181fb70 DH |
220 | if (!backend->reserve && value) { |
221 | error_setg(errp, "'prealloc=on' and 'reserve=off' are incompatible"); | |
222 | return; | |
223 | } | |
224 | ||
6f4c60e4 | 225 | if (!host_memory_backend_mr_inited(backend)) { |
a35ba7be PB |
226 | backend->prealloc = value; |
227 | return; | |
228 | } | |
229 | ||
230 | if (value && !backend->prealloc) { | |
231 | int fd = memory_region_get_fd(&backend->mr); | |
232 | void *ptr = memory_region_get_ram_ptr(&backend->mr); | |
233 | uint64_t sz = memory_region_size(&backend->mr); | |
234 | ||
ffac16fa | 235 | os_mem_prealloc(fd, ptr, sz, backend->prealloc_threads, &local_err); |
056b68af IM |
236 | if (local_err) { |
237 | error_propagate(errp, local_err); | |
238 | return; | |
239 | } | |
a35ba7be PB |
240 | backend->prealloc = true; |
241 | } | |
242 | } | |
243 | ||
ffac16fa IM |
244 | static void host_memory_backend_get_prealloc_threads(Object *obj, Visitor *v, |
245 | const char *name, void *opaque, Error **errp) | |
246 | { | |
247 | HostMemoryBackend *backend = MEMORY_BACKEND(obj); | |
248 | visit_type_uint32(v, name, &backend->prealloc_threads, errp); | |
249 | } | |
250 | ||
251 | static void host_memory_backend_set_prealloc_threads(Object *obj, Visitor *v, | |
252 | const char *name, void *opaque, Error **errp) | |
253 | { | |
254 | HostMemoryBackend *backend = MEMORY_BACKEND(obj); | |
ffac16fa IM |
255 | uint32_t value; |
256 | ||
668f62ec | 257 | if (!visit_type_uint32(v, name, &value, errp)) { |
dcfe4805 | 258 | return; |
ffac16fa IM |
259 | } |
260 | if (value <= 0) { | |
dcfe4805 MA |
261 | error_setg(errp, "property '%s' of %s doesn't take value '%d'", name, |
262 | object_get_typename(obj), value); | |
263 | return; | |
ffac16fa IM |
264 | } |
265 | backend->prealloc_threads = value; | |
ffac16fa IM |
266 | } |
267 | ||
58f4662c | 268 | static void host_memory_backend_init(Object *obj) |
1f070489 | 269 | { |
605d0a94 | 270 | HostMemoryBackend *backend = MEMORY_BACKEND(obj); |
6b269967 | 271 | MachineState *machine = MACHINE(qdev_get_machine()); |
605d0a94 | 272 | |
ffac16fa | 273 | /* TODO: convert access to globals to compat properties */ |
6b269967 EH |
274 | backend->merge = machine_mem_merge(machine); |
275 | backend->dump = machine_dump_guest_core(machine); | |
9181fb70 | 276 | backend->reserve = true; |
f8d426a6 | 277 | backend->prealloc_threads = machine->smp.cpus; |
1f070489 IM |
278 | } |
279 | ||
fa0cb34d MAL |
280 | static void host_memory_backend_post_init(Object *obj) |
281 | { | |
282 | object_apply_compat_props(obj); | |
283 | } | |
284 | ||
4728b574 PX |
285 | bool host_memory_backend_mr_inited(HostMemoryBackend *backend) |
286 | { | |
287 | /* | |
288 | * NOTE: We forbid zero-length memory backend, so here zero means | |
289 | * "we haven't inited the backend memory region yet". | |
290 | */ | |
291 | return memory_region_size(&backend->mr) != 0; | |
292 | } | |
293 | ||
7943e97b | 294 | MemoryRegion *host_memory_backend_get_memory(HostMemoryBackend *backend) |
1f070489 | 295 | { |
6f4c60e4 | 296 | return host_memory_backend_mr_inited(backend) ? &backend->mr : NULL; |
1f070489 IM |
297 | } |
298 | ||
2aece63c XG |
299 | void host_memory_backend_set_mapped(HostMemoryBackend *backend, bool mapped) |
300 | { | |
301 | backend->is_mapped = mapped; | |
302 | } | |
303 | ||
304 | bool host_memory_backend_is_mapped(HostMemoryBackend *backend) | |
305 | { | |
306 | return backend->is_mapped; | |
307 | } | |
308 | ||
2b108085 DG |
309 | size_t host_memory_backend_pagesize(HostMemoryBackend *memdev) |
310 | { | |
8be934b7 TH |
311 | size_t pagesize = qemu_ram_pagesize(memdev->mr.ram_block); |
312 | g_assert(pagesize >= qemu_real_host_page_size()); | |
2b108085 DG |
313 | return pagesize; |
314 | } | |
2b108085 | 315 | |
bd9262d9 HT |
316 | static void |
317 | host_memory_backend_memory_complete(UserCreatable *uc, Error **errp) | |
318 | { | |
319 | HostMemoryBackend *backend = MEMORY_BACKEND(uc); | |
320 | HostMemoryBackendClass *bc = MEMORY_BACKEND_GET_CLASS(uc); | |
605d0a94 PB |
321 | Error *local_err = NULL; |
322 | void *ptr; | |
323 | uint64_t sz; | |
bd9262d9 HT |
324 | |
325 | if (bc->alloc) { | |
605d0a94 PB |
326 | bc->alloc(backend, &local_err); |
327 | if (local_err) { | |
056b68af | 328 | goto out; |
605d0a94 PB |
329 | } |
330 | ||
331 | ptr = memory_region_get_ram_ptr(&backend->mr); | |
332 | sz = memory_region_size(&backend->mr); | |
333 | ||
334 | if (backend->merge) { | |
335 | qemu_madvise(ptr, sz, QEMU_MADV_MERGEABLE); | |
336 | } | |
337 | if (!backend->dump) { | |
338 | qemu_madvise(ptr, sz, QEMU_MADV_DONTDUMP); | |
339 | } | |
4cf1b76b HT |
340 | #ifdef CONFIG_NUMA |
341 | unsigned long lastbit = find_last_bit(backend->host_nodes, MAX_NODES); | |
342 | /* lastbit == MAX_NODES means maxnode = 0 */ | |
343 | unsigned long maxnode = (lastbit + 1) % (MAX_NODES + 1); | |
344 | /* ensure policy won't be ignored in case memory is preallocated | |
345 | * before mbind(). note: MPOL_MF_STRICT is ignored on hugepages so | |
346 | * this doesn't catch hugepage case. */ | |
288d3322 | 347 | unsigned flags = MPOL_MF_STRICT | MPOL_MF_MOVE; |
4cf1b76b HT |
348 | |
349 | /* check for invalid host-nodes and policies and give more verbose | |
350 | * error messages than mbind(). */ | |
351 | if (maxnode && backend->policy == MPOL_DEFAULT) { | |
352 | error_setg(errp, "host-nodes must be empty for policy default," | |
353 | " or you should explicitly specify a policy other" | |
354 | " than default"); | |
355 | return; | |
356 | } else if (maxnode == 0 && backend->policy != MPOL_DEFAULT) { | |
357 | error_setg(errp, "host-nodes must be set for policy %s", | |
977c736f | 358 | HostMemPolicy_str(backend->policy)); |
4cf1b76b HT |
359 | return; |
360 | } | |
361 | ||
362 | /* We can have up to MAX_NODES nodes, but we need to pass maxnode+1 | |
363 | * as argument to mbind() due to an old Linux bug (feature?) which | |
364 | * cuts off the last specified node. This means backend->host_nodes | |
365 | * must have MAX_NODES+1 bits available. | |
366 | */ | |
367 | assert(sizeof(backend->host_nodes) >= | |
368 | BITS_TO_LONGS(MAX_NODES + 1) * sizeof(unsigned long)); | |
369 | assert(maxnode <= MAX_NODES); | |
70b6d525 IM |
370 | |
371 | if (maxnode && | |
372 | mbind(ptr, sz, backend->policy, backend->host_nodes, maxnode + 1, | |
373 | flags)) { | |
a3567ba1 PF |
374 | if (backend->policy != MPOL_DEFAULT || errno != ENOSYS) { |
375 | error_setg_errno(errp, errno, | |
376 | "cannot bind memory to host NUMA nodes"); | |
377 | return; | |
378 | } | |
4cf1b76b HT |
379 | } |
380 | #endif | |
381 | /* Preallocate memory after the NUMA policy has been instantiated. | |
382 | * This is necessary to guarantee memory is allocated with | |
383 | * specified NUMA policy in place. | |
384 | */ | |
a35ba7be | 385 | if (backend->prealloc) { |
056b68af | 386 | os_mem_prealloc(memory_region_get_fd(&backend->mr), ptr, sz, |
ffac16fa | 387 | backend->prealloc_threads, &local_err); |
056b68af IM |
388 | if (local_err) { |
389 | goto out; | |
390 | } | |
a35ba7be | 391 | } |
bd9262d9 | 392 | } |
056b68af IM |
393 | out: |
394 | error_propagate(errp, local_err); | |
bd9262d9 HT |
395 | } |
396 | ||
36bce5ca | 397 | static bool |
3beacfb9 | 398 | host_memory_backend_can_be_deleted(UserCreatable *uc) |
36bce5ca | 399 | { |
2aece63c | 400 | if (host_memory_backend_is_mapped(MEMORY_BACKEND(uc))) { |
36bce5ca LM |
401 | return false; |
402 | } else { | |
403 | return true; | |
404 | } | |
405 | } | |
406 | ||
06329cce MA |
407 | static bool host_memory_backend_get_share(Object *o, Error **errp) |
408 | { | |
409 | HostMemoryBackend *backend = MEMORY_BACKEND(o); | |
410 | ||
411 | return backend->share; | |
412 | } | |
413 | ||
414 | static void host_memory_backend_set_share(Object *o, bool value, Error **errp) | |
415 | { | |
416 | HostMemoryBackend *backend = MEMORY_BACKEND(o); | |
417 | ||
418 | if (host_memory_backend_mr_inited(backend)) { | |
419 | error_setg(errp, "cannot change property value"); | |
420 | return; | |
421 | } | |
422 | backend->share = value; | |
423 | } | |
424 | ||
9181fb70 DH |
425 | #ifdef CONFIG_LINUX |
426 | static bool host_memory_backend_get_reserve(Object *o, Error **errp) | |
427 | { | |
428 | HostMemoryBackend *backend = MEMORY_BACKEND(o); | |
429 | ||
430 | return backend->reserve; | |
431 | } | |
432 | ||
433 | static void host_memory_backend_set_reserve(Object *o, bool value, Error **errp) | |
434 | { | |
435 | HostMemoryBackend *backend = MEMORY_BACKEND(o); | |
436 | ||
437 | if (host_memory_backend_mr_inited(backend)) { | |
438 | error_setg(errp, "cannot change property value"); | |
439 | return; | |
440 | } | |
441 | if (backend->prealloc && !value) { | |
442 | error_setg(errp, "'prealloc=on' and 'reserve=off' are incompatible"); | |
443 | return; | |
444 | } | |
445 | backend->reserve = value; | |
446 | } | |
447 | #endif /* CONFIG_LINUX */ | |
448 | ||
fa0cb34d MAL |
449 | static bool |
450 | host_memory_backend_get_use_canonical_path(Object *obj, Error **errp) | |
451 | { | |
452 | HostMemoryBackend *backend = MEMORY_BACKEND(obj); | |
453 | ||
454 | return backend->use_canonical_path; | |
455 | } | |
456 | ||
457 | static void | |
458 | host_memory_backend_set_use_canonical_path(Object *obj, bool value, | |
459 | Error **errp) | |
460 | { | |
461 | HostMemoryBackend *backend = MEMORY_BACKEND(obj); | |
462 | ||
463 | backend->use_canonical_path = value; | |
464 | } | |
465 | ||
bd9262d9 HT |
466 | static void |
467 | host_memory_backend_class_init(ObjectClass *oc, void *data) | |
468 | { | |
469 | UserCreatableClass *ucc = USER_CREATABLE_CLASS(oc); | |
470 | ||
471 | ucc->complete = host_memory_backend_memory_complete; | |
36bce5ca | 472 | ucc->can_be_deleted = host_memory_backend_can_be_deleted; |
e62834ca EH |
473 | |
474 | object_class_property_add_bool(oc, "merge", | |
475 | host_memory_backend_get_merge, | |
d2623129 | 476 | host_memory_backend_set_merge); |
033bfc5e | 477 | object_class_property_set_description(oc, "merge", |
7eecec7d | 478 | "Mark memory as mergeable"); |
e62834ca EH |
479 | object_class_property_add_bool(oc, "dump", |
480 | host_memory_backend_get_dump, | |
d2623129 | 481 | host_memory_backend_set_dump); |
033bfc5e | 482 | object_class_property_set_description(oc, "dump", |
7eecec7d | 483 | "Set to 'off' to exclude from core dump"); |
e62834ca EH |
484 | object_class_property_add_bool(oc, "prealloc", |
485 | host_memory_backend_get_prealloc, | |
d2623129 | 486 | host_memory_backend_set_prealloc); |
033bfc5e | 487 | object_class_property_set_description(oc, "prealloc", |
7eecec7d | 488 | "Preallocate memory"); |
ffac16fa IM |
489 | object_class_property_add(oc, "prealloc-threads", "int", |
490 | host_memory_backend_get_prealloc_threads, | |
491 | host_memory_backend_set_prealloc_threads, | |
d2623129 | 492 | NULL, NULL); |
ffac16fa | 493 | object_class_property_set_description(oc, "prealloc-threads", |
7eecec7d | 494 | "Number of CPU threads to use for prealloc"); |
e62834ca EH |
495 | object_class_property_add(oc, "size", "int", |
496 | host_memory_backend_get_size, | |
497 | host_memory_backend_set_size, | |
d2623129 | 498 | NULL, NULL); |
033bfc5e | 499 | object_class_property_set_description(oc, "size", |
7eecec7d | 500 | "Size of the memory region (ex: 500M)"); |
e62834ca EH |
501 | object_class_property_add(oc, "host-nodes", "int", |
502 | host_memory_backend_get_host_nodes, | |
503 | host_memory_backend_set_host_nodes, | |
d2623129 | 504 | NULL, NULL); |
033bfc5e | 505 | object_class_property_set_description(oc, "host-nodes", |
7eecec7d | 506 | "Binds memory to the list of NUMA host nodes"); |
e62834ca | 507 | object_class_property_add_enum(oc, "policy", "HostMemPolicy", |
f7abe0ec | 508 | &HostMemPolicy_lookup, |
e62834ca | 509 | host_memory_backend_get_policy, |
d2623129 | 510 | host_memory_backend_set_policy); |
033bfc5e | 511 | object_class_property_set_description(oc, "policy", |
7eecec7d | 512 | "Set the NUMA policy"); |
06329cce | 513 | object_class_property_add_bool(oc, "share", |
d2623129 | 514 | host_memory_backend_get_share, host_memory_backend_set_share); |
033bfc5e | 515 | object_class_property_set_description(oc, "share", |
7eecec7d | 516 | "Mark the memory as private to QEMU or shared"); |
9181fb70 DH |
517 | #ifdef CONFIG_LINUX |
518 | object_class_property_add_bool(oc, "reserve", | |
519 | host_memory_backend_get_reserve, host_memory_backend_set_reserve); | |
520 | object_class_property_set_description(oc, "reserve", | |
521 | "Reserve swap space (or huge pages) if applicable"); | |
522 | #endif /* CONFIG_LINUX */ | |
8db0b204 IM |
523 | /* |
524 | * Do not delete/rename option. This option must be considered stable | |
525 | * (as if it didn't have the 'x-' prefix including deprecation period) as | |
526 | * long as 4.0 and older machine types exists. | |
527 | * Option will be used by upper layers to override (disable) canonical path | |
528 | * for ramblock-id set by compat properties on old machine types ( <= 4.0), | |
529 | * to keep migration working when backend is used for main RAM with | |
530 | * -machine memory-backend= option (main RAM historically used prefix-less | |
531 | * ramblock-id). | |
532 | */ | |
fa0cb34d MAL |
533 | object_class_property_add_bool(oc, "x-use-canonical-path-for-ramblock-id", |
534 | host_memory_backend_get_use_canonical_path, | |
d2623129 | 535 | host_memory_backend_set_use_canonical_path); |
e1ff3c67 IM |
536 | } |
537 | ||
58f4662c | 538 | static const TypeInfo host_memory_backend_info = { |
1f070489 IM |
539 | .name = TYPE_MEMORY_BACKEND, |
540 | .parent = TYPE_OBJECT, | |
541 | .abstract = true, | |
542 | .class_size = sizeof(HostMemoryBackendClass), | |
bd9262d9 | 543 | .class_init = host_memory_backend_class_init, |
1f070489 | 544 | .instance_size = sizeof(HostMemoryBackend), |
58f4662c | 545 | .instance_init = host_memory_backend_init, |
fa0cb34d | 546 | .instance_post_init = host_memory_backend_post_init, |
1f070489 IM |
547 | .interfaces = (InterfaceInfo[]) { |
548 | { TYPE_USER_CREATABLE }, | |
549 | { } | |
550 | } | |
551 | }; | |
552 | ||
553 | static void register_types(void) | |
554 | { | |
58f4662c | 555 | type_register_static(&host_memory_backend_info); |
1f070489 IM |
556 | } |
557 | ||
558 | type_init(register_types); |