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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> | |
6bb613f0 | 26 | #include <numa.h> |
4cf1b76b | 27 | QEMU_BUILD_BUG_ON(HOST_MEM_POLICY_DEFAULT != MPOL_DEFAULT); |
6bb613f0 MP |
28 | /* |
29 | * HOST_MEM_POLICY_PREFERRED may either translate to MPOL_PREFERRED or | |
30 | * MPOL_PREFERRED_MANY, see comments further below. | |
31 | */ | |
4cf1b76b HT |
32 | QEMU_BUILD_BUG_ON(HOST_MEM_POLICY_PREFERRED != MPOL_PREFERRED); |
33 | QEMU_BUILD_BUG_ON(HOST_MEM_POLICY_BIND != MPOL_BIND); | |
34 | QEMU_BUILD_BUG_ON(HOST_MEM_POLICY_INTERLEAVE != MPOL_INTERLEAVE); | |
35 | #endif | |
36 | ||
fa0cb34d MAL |
37 | char * |
38 | host_memory_backend_get_name(HostMemoryBackend *backend) | |
39 | { | |
40 | if (!backend->use_canonical_path) { | |
7a309cc9 | 41 | return g_strdup(object_get_canonical_path_component(OBJECT(backend))); |
fa0cb34d MAL |
42 | } |
43 | ||
44 | return object_get_canonical_path(OBJECT(backend)); | |
45 | } | |
46 | ||
1f070489 | 47 | static void |
d7bce999 EB |
48 | host_memory_backend_get_size(Object *obj, Visitor *v, const char *name, |
49 | void *opaque, Error **errp) | |
1f070489 IM |
50 | { |
51 | HostMemoryBackend *backend = MEMORY_BACKEND(obj); | |
52 | uint64_t value = backend->size; | |
53 | ||
51e72bc1 | 54 | visit_type_size(v, name, &value, errp); |
1f070489 IM |
55 | } |
56 | ||
57 | static void | |
d7bce999 EB |
58 | host_memory_backend_set_size(Object *obj, Visitor *v, const char *name, |
59 | void *opaque, Error **errp) | |
1f070489 IM |
60 | { |
61 | HostMemoryBackend *backend = MEMORY_BACKEND(obj); | |
1f070489 IM |
62 | uint64_t value; |
63 | ||
6f4c60e4 | 64 | if (host_memory_backend_mr_inited(backend)) { |
dcfe4805 MA |
65 | error_setg(errp, "cannot change property %s of %s ", name, |
66 | object_get_typename(obj)); | |
67 | return; | |
1f070489 IM |
68 | } |
69 | ||
668f62ec | 70 | if (!visit_type_size(v, name, &value, errp)) { |
dcfe4805 | 71 | return; |
1f070489 IM |
72 | } |
73 | if (!value) { | |
dcfe4805 | 74 | error_setg(errp, |
21d16836 ZY |
75 | "property '%s' of %s doesn't take value '%" PRIu64 "'", |
76 | name, object_get_typename(obj), value); | |
dcfe4805 | 77 | return; |
1f070489 IM |
78 | } |
79 | backend->size = value; | |
1f070489 IM |
80 | } |
81 | ||
4cf1b76b | 82 | static void |
d7bce999 EB |
83 | host_memory_backend_get_host_nodes(Object *obj, Visitor *v, const char *name, |
84 | void *opaque, Error **errp) | |
4cf1b76b HT |
85 | { |
86 | HostMemoryBackend *backend = MEMORY_BACKEND(obj); | |
87 | uint16List *host_nodes = NULL; | |
c3033fd3 | 88 | uint16List **tail = &host_nodes; |
4cf1b76b HT |
89 | unsigned long value; |
90 | ||
91 | value = find_first_bit(backend->host_nodes, MAX_NODES); | |
92 | if (value == MAX_NODES) { | |
15160ab7 | 93 | goto ret; |
4cf1b76b HT |
94 | } |
95 | ||
c3033fd3 | 96 | QAPI_LIST_APPEND(tail, value); |
658ae5a7 | 97 | |
4cf1b76b HT |
98 | do { |
99 | value = find_next_bit(backend->host_nodes, MAX_NODES, value + 1); | |
100 | if (value == MAX_NODES) { | |
101 | break; | |
102 | } | |
103 | ||
c3033fd3 | 104 | QAPI_LIST_APPEND(tail, value); |
4cf1b76b HT |
105 | } while (true); |
106 | ||
15160ab7 | 107 | ret: |
51e72bc1 | 108 | visit_type_uint16List(v, name, &host_nodes, errp); |
bdd5ce05 | 109 | qapi_free_uint16List(host_nodes); |
4cf1b76b HT |
110 | } |
111 | ||
112 | static void | |
d7bce999 EB |
113 | host_memory_backend_set_host_nodes(Object *obj, Visitor *v, const char *name, |
114 | void *opaque, Error **errp) | |
4cf1b76b HT |
115 | { |
116 | #ifdef CONFIG_NUMA | |
117 | HostMemoryBackend *backend = MEMORY_BACKEND(obj); | |
ffa144b3 | 118 | uint16List *l, *host_nodes = NULL; |
4cf1b76b | 119 | |
ffa144b3 EH |
120 | visit_type_uint16List(v, name, &host_nodes, errp); |
121 | ||
122 | for (l = host_nodes; l; l = l->next) { | |
123 | if (l->value >= MAX_NODES) { | |
124 | error_setg(errp, "Invalid host-nodes value: %d", l->value); | |
125 | goto out; | |
126 | } | |
127 | } | |
4cf1b76b | 128 | |
ffa144b3 | 129 | for (l = host_nodes; l; l = l->next) { |
4cf1b76b | 130 | bitmap_set(backend->host_nodes, l->value, 1); |
4cf1b76b | 131 | } |
ffa144b3 EH |
132 | |
133 | out: | |
134 | qapi_free_uint16List(host_nodes); | |
4cf1b76b HT |
135 | #else |
136 | error_setg(errp, "NUMA node binding are not supported by this QEMU"); | |
137 | #endif | |
138 | } | |
139 | ||
a3590dac DB |
140 | static int |
141 | host_memory_backend_get_policy(Object *obj, Error **errp G_GNUC_UNUSED) | |
4cf1b76b HT |
142 | { |
143 | HostMemoryBackend *backend = MEMORY_BACKEND(obj); | |
a3590dac | 144 | return backend->policy; |
4cf1b76b HT |
145 | } |
146 | ||
147 | static void | |
a3590dac | 148 | host_memory_backend_set_policy(Object *obj, int policy, Error **errp) |
4cf1b76b HT |
149 | { |
150 | HostMemoryBackend *backend = MEMORY_BACKEND(obj); | |
4cf1b76b HT |
151 | backend->policy = policy; |
152 | ||
153 | #ifndef CONFIG_NUMA | |
154 | if (policy != HOST_MEM_POLICY_DEFAULT) { | |
155 | error_setg(errp, "NUMA policies are not supported by this QEMU"); | |
156 | } | |
157 | #endif | |
158 | } | |
159 | ||
605d0a94 PB |
160 | static bool host_memory_backend_get_merge(Object *obj, Error **errp) |
161 | { | |
162 | HostMemoryBackend *backend = MEMORY_BACKEND(obj); | |
163 | ||
164 | return backend->merge; | |
165 | } | |
166 | ||
167 | static void host_memory_backend_set_merge(Object *obj, bool value, Error **errp) | |
168 | { | |
169 | HostMemoryBackend *backend = MEMORY_BACKEND(obj); | |
170 | ||
6f4c60e4 | 171 | if (!host_memory_backend_mr_inited(backend)) { |
605d0a94 PB |
172 | backend->merge = value; |
173 | return; | |
174 | } | |
175 | ||
176 | if (value != backend->merge) { | |
177 | void *ptr = memory_region_get_ram_ptr(&backend->mr); | |
178 | uint64_t sz = memory_region_size(&backend->mr); | |
179 | ||
180 | qemu_madvise(ptr, sz, | |
181 | value ? QEMU_MADV_MERGEABLE : QEMU_MADV_UNMERGEABLE); | |
182 | backend->merge = value; | |
183 | } | |
184 | } | |
185 | ||
186 | static bool host_memory_backend_get_dump(Object *obj, Error **errp) | |
187 | { | |
188 | HostMemoryBackend *backend = MEMORY_BACKEND(obj); | |
189 | ||
190 | return backend->dump; | |
191 | } | |
192 | ||
193 | static void host_memory_backend_set_dump(Object *obj, bool value, Error **errp) | |
194 | { | |
195 | HostMemoryBackend *backend = MEMORY_BACKEND(obj); | |
196 | ||
6f4c60e4 | 197 | if (!host_memory_backend_mr_inited(backend)) { |
605d0a94 PB |
198 | backend->dump = value; |
199 | return; | |
200 | } | |
201 | ||
202 | if (value != backend->dump) { | |
203 | void *ptr = memory_region_get_ram_ptr(&backend->mr); | |
204 | uint64_t sz = memory_region_size(&backend->mr); | |
205 | ||
206 | qemu_madvise(ptr, sz, | |
207 | value ? QEMU_MADV_DODUMP : QEMU_MADV_DONTDUMP); | |
208 | backend->dump = value; | |
209 | } | |
210 | } | |
211 | ||
a35ba7be PB |
212 | static bool host_memory_backend_get_prealloc(Object *obj, Error **errp) |
213 | { | |
214 | HostMemoryBackend *backend = MEMORY_BACKEND(obj); | |
215 | ||
4ebc74db | 216 | return backend->prealloc; |
a35ba7be PB |
217 | } |
218 | ||
219 | static void host_memory_backend_set_prealloc(Object *obj, bool value, | |
220 | Error **errp) | |
221 | { | |
222 | HostMemoryBackend *backend = MEMORY_BACKEND(obj); | |
223 | ||
9181fb70 DH |
224 | if (!backend->reserve && value) { |
225 | error_setg(errp, "'prealloc=on' and 'reserve=off' are incompatible"); | |
226 | return; | |
227 | } | |
228 | ||
6f4c60e4 | 229 | if (!host_memory_backend_mr_inited(backend)) { |
a35ba7be PB |
230 | backend->prealloc = value; |
231 | return; | |
232 | } | |
233 | ||
234 | if (value && !backend->prealloc) { | |
235 | int fd = memory_region_get_fd(&backend->mr); | |
236 | void *ptr = memory_region_get_ram_ptr(&backend->mr); | |
237 | uint64_t sz = memory_region_size(&backend->mr); | |
238 | ||
9c878ad6 PMD |
239 | if (!qemu_prealloc_mem(fd, ptr, sz, backend->prealloc_threads, |
240 | backend->prealloc_context, errp)) { | |
056b68af IM |
241 | return; |
242 | } | |
a35ba7be PB |
243 | backend->prealloc = true; |
244 | } | |
245 | } | |
246 | ||
ffac16fa IM |
247 | static void host_memory_backend_get_prealloc_threads(Object *obj, Visitor *v, |
248 | const char *name, void *opaque, Error **errp) | |
249 | { | |
250 | HostMemoryBackend *backend = MEMORY_BACKEND(obj); | |
251 | visit_type_uint32(v, name, &backend->prealloc_threads, errp); | |
252 | } | |
253 | ||
254 | static void host_memory_backend_set_prealloc_threads(Object *obj, Visitor *v, | |
255 | const char *name, void *opaque, Error **errp) | |
256 | { | |
257 | HostMemoryBackend *backend = MEMORY_BACKEND(obj); | |
ffac16fa IM |
258 | uint32_t value; |
259 | ||
668f62ec | 260 | if (!visit_type_uint32(v, name, &value, errp)) { |
dcfe4805 | 261 | return; |
ffac16fa IM |
262 | } |
263 | if (value <= 0) { | |
dcfe4805 MA |
264 | error_setg(errp, "property '%s' of %s doesn't take value '%d'", name, |
265 | object_get_typename(obj), value); | |
266 | return; | |
ffac16fa IM |
267 | } |
268 | backend->prealloc_threads = value; | |
ffac16fa IM |
269 | } |
270 | ||
58f4662c | 271 | static void host_memory_backend_init(Object *obj) |
1f070489 | 272 | { |
605d0a94 | 273 | HostMemoryBackend *backend = MEMORY_BACKEND(obj); |
6b269967 | 274 | MachineState *machine = MACHINE(qdev_get_machine()); |
605d0a94 | 275 | |
ffac16fa | 276 | /* TODO: convert access to globals to compat properties */ |
6b269967 EH |
277 | backend->merge = machine_mem_merge(machine); |
278 | backend->dump = machine_dump_guest_core(machine); | |
9181fb70 | 279 | backend->reserve = true; |
f8d426a6 | 280 | backend->prealloc_threads = machine->smp.cpus; |
1f070489 IM |
281 | } |
282 | ||
fa0cb34d MAL |
283 | static void host_memory_backend_post_init(Object *obj) |
284 | { | |
285 | object_apply_compat_props(obj); | |
286 | } | |
287 | ||
4728b574 PX |
288 | bool host_memory_backend_mr_inited(HostMemoryBackend *backend) |
289 | { | |
290 | /* | |
291 | * NOTE: We forbid zero-length memory backend, so here zero means | |
292 | * "we haven't inited the backend memory region yet". | |
293 | */ | |
294 | return memory_region_size(&backend->mr) != 0; | |
295 | } | |
296 | ||
7943e97b | 297 | MemoryRegion *host_memory_backend_get_memory(HostMemoryBackend *backend) |
1f070489 | 298 | { |
6f4c60e4 | 299 | return host_memory_backend_mr_inited(backend) ? &backend->mr : NULL; |
1f070489 IM |
300 | } |
301 | ||
2aece63c XG |
302 | void host_memory_backend_set_mapped(HostMemoryBackend *backend, bool mapped) |
303 | { | |
304 | backend->is_mapped = mapped; | |
305 | } | |
306 | ||
307 | bool host_memory_backend_is_mapped(HostMemoryBackend *backend) | |
308 | { | |
309 | return backend->is_mapped; | |
310 | } | |
311 | ||
2b108085 DG |
312 | size_t host_memory_backend_pagesize(HostMemoryBackend *memdev) |
313 | { | |
8be934b7 TH |
314 | size_t pagesize = qemu_ram_pagesize(memdev->mr.ram_block); |
315 | g_assert(pagesize >= qemu_real_host_page_size()); | |
2b108085 DG |
316 | return pagesize; |
317 | } | |
2b108085 | 318 | |
bd9262d9 HT |
319 | static void |
320 | host_memory_backend_memory_complete(UserCreatable *uc, Error **errp) | |
321 | { | |
322 | HostMemoryBackend *backend = MEMORY_BACKEND(uc); | |
323 | HostMemoryBackendClass *bc = MEMORY_BACKEND_GET_CLASS(uc); | |
605d0a94 PB |
324 | void *ptr; |
325 | uint64_t sz; | |
bd9262d9 | 326 | |
e199f7ad PMD |
327 | if (!bc->alloc) { |
328 | return; | |
329 | } | |
fdb63cf3 PMD |
330 | if (!bc->alloc(backend, errp)) { |
331 | return; | |
e199f7ad | 332 | } |
605d0a94 | 333 | |
e199f7ad PMD |
334 | ptr = memory_region_get_ram_ptr(&backend->mr); |
335 | sz = memory_region_size(&backend->mr); | |
605d0a94 | 336 | |
e199f7ad PMD |
337 | if (backend->merge) { |
338 | qemu_madvise(ptr, sz, QEMU_MADV_MERGEABLE); | |
339 | } | |
340 | if (!backend->dump) { | |
341 | qemu_madvise(ptr, sz, QEMU_MADV_DONTDUMP); | |
342 | } | |
4cf1b76b | 343 | #ifdef CONFIG_NUMA |
e199f7ad PMD |
344 | unsigned long lastbit = find_last_bit(backend->host_nodes, MAX_NODES); |
345 | /* lastbit == MAX_NODES means maxnode = 0 */ | |
346 | unsigned long maxnode = (lastbit + 1) % (MAX_NODES + 1); | |
347 | /* ensure policy won't be ignored in case memory is preallocated | |
348 | * before mbind(). note: MPOL_MF_STRICT is ignored on hugepages so | |
349 | * this doesn't catch hugepage case. */ | |
350 | unsigned flags = MPOL_MF_STRICT | MPOL_MF_MOVE; | |
351 | int mode = backend->policy; | |
352 | ||
353 | /* check for invalid host-nodes and policies and give more verbose | |
354 | * error messages than mbind(). */ | |
355 | if (maxnode && backend->policy == MPOL_DEFAULT) { | |
356 | error_setg(errp, "host-nodes must be empty for policy default," | |
357 | " or you should explicitly specify a policy other" | |
358 | " than default"); | |
359 | return; | |
360 | } else if (maxnode == 0 && backend->policy != MPOL_DEFAULT) { | |
361 | error_setg(errp, "host-nodes must be set for policy %s", | |
362 | HostMemPolicy_str(backend->policy)); | |
363 | return; | |
364 | } | |
4cf1b76b | 365 | |
e199f7ad PMD |
366 | /* We can have up to MAX_NODES nodes, but we need to pass maxnode+1 |
367 | * as argument to mbind() due to an old Linux bug (feature?) which | |
368 | * cuts off the last specified node. This means backend->host_nodes | |
369 | * must have MAX_NODES+1 bits available. | |
370 | */ | |
371 | assert(sizeof(backend->host_nodes) >= | |
372 | BITS_TO_LONGS(MAX_NODES + 1) * sizeof(unsigned long)); | |
373 | assert(maxnode <= MAX_NODES); | |
70b6d525 | 374 | |
6bb613f0 | 375 | #ifdef HAVE_NUMA_HAS_PREFERRED_MANY |
e199f7ad PMD |
376 | if (mode == MPOL_PREFERRED && numa_has_preferred_many() > 0) { |
377 | /* | |
378 | * Replace with MPOL_PREFERRED_MANY otherwise the mbind() below | |
379 | * silently picks the first node. | |
380 | */ | |
381 | mode = MPOL_PREFERRED_MANY; | |
382 | } | |
6bb613f0 MP |
383 | #endif |
384 | ||
e199f7ad PMD |
385 | if (maxnode && |
386 | mbind(ptr, sz, mode, backend->host_nodes, maxnode + 1, flags)) { | |
387 | if (backend->policy != MPOL_DEFAULT || errno != ENOSYS) { | |
388 | error_setg_errno(errp, errno, | |
389 | "cannot bind memory to host NUMA nodes"); | |
390 | return; | |
4cf1b76b | 391 | } |
e199f7ad | 392 | } |
4cf1b76b | 393 | #endif |
e199f7ad PMD |
394 | /* Preallocate memory after the NUMA policy has been instantiated. |
395 | * This is necessary to guarantee memory is allocated with | |
396 | * specified NUMA policy in place. | |
397 | */ | |
9c878ad6 PMD |
398 | if (backend->prealloc && !qemu_prealloc_mem(memory_region_get_fd(&backend->mr), |
399 | ptr, sz, | |
400 | backend->prealloc_threads, | |
401 | backend->prealloc_context, errp)) { | |
402 | return; | |
bd9262d9 HT |
403 | } |
404 | } | |
405 | ||
36bce5ca | 406 | static bool |
3beacfb9 | 407 | host_memory_backend_can_be_deleted(UserCreatable *uc) |
36bce5ca | 408 | { |
2aece63c | 409 | if (host_memory_backend_is_mapped(MEMORY_BACKEND(uc))) { |
36bce5ca LM |
410 | return false; |
411 | } else { | |
412 | return true; | |
413 | } | |
414 | } | |
415 | ||
06329cce MA |
416 | static bool host_memory_backend_get_share(Object *o, Error **errp) |
417 | { | |
418 | HostMemoryBackend *backend = MEMORY_BACKEND(o); | |
419 | ||
420 | return backend->share; | |
421 | } | |
422 | ||
423 | static void host_memory_backend_set_share(Object *o, bool value, Error **errp) | |
424 | { | |
425 | HostMemoryBackend *backend = MEMORY_BACKEND(o); | |
426 | ||
427 | if (host_memory_backend_mr_inited(backend)) { | |
428 | error_setg(errp, "cannot change property value"); | |
429 | return; | |
430 | } | |
431 | backend->share = value; | |
432 | } | |
433 | ||
9181fb70 DH |
434 | #ifdef CONFIG_LINUX |
435 | static bool host_memory_backend_get_reserve(Object *o, Error **errp) | |
436 | { | |
437 | HostMemoryBackend *backend = MEMORY_BACKEND(o); | |
438 | ||
439 | return backend->reserve; | |
440 | } | |
441 | ||
442 | static void host_memory_backend_set_reserve(Object *o, bool value, Error **errp) | |
443 | { | |
444 | HostMemoryBackend *backend = MEMORY_BACKEND(o); | |
445 | ||
446 | if (host_memory_backend_mr_inited(backend)) { | |
447 | error_setg(errp, "cannot change property value"); | |
448 | return; | |
449 | } | |
450 | if (backend->prealloc && !value) { | |
451 | error_setg(errp, "'prealloc=on' and 'reserve=off' are incompatible"); | |
452 | return; | |
453 | } | |
454 | backend->reserve = value; | |
455 | } | |
456 | #endif /* CONFIG_LINUX */ | |
457 | ||
fa0cb34d MAL |
458 | static bool |
459 | host_memory_backend_get_use_canonical_path(Object *obj, Error **errp) | |
460 | { | |
461 | HostMemoryBackend *backend = MEMORY_BACKEND(obj); | |
462 | ||
463 | return backend->use_canonical_path; | |
464 | } | |
465 | ||
466 | static void | |
467 | host_memory_backend_set_use_canonical_path(Object *obj, bool value, | |
468 | Error **errp) | |
469 | { | |
470 | HostMemoryBackend *backend = MEMORY_BACKEND(obj); | |
471 | ||
472 | backend->use_canonical_path = value; | |
473 | } | |
474 | ||
bd9262d9 HT |
475 | static void |
476 | host_memory_backend_class_init(ObjectClass *oc, void *data) | |
477 | { | |
478 | UserCreatableClass *ucc = USER_CREATABLE_CLASS(oc); | |
479 | ||
480 | ucc->complete = host_memory_backend_memory_complete; | |
36bce5ca | 481 | ucc->can_be_deleted = host_memory_backend_can_be_deleted; |
e62834ca EH |
482 | |
483 | object_class_property_add_bool(oc, "merge", | |
484 | host_memory_backend_get_merge, | |
d2623129 | 485 | host_memory_backend_set_merge); |
033bfc5e | 486 | object_class_property_set_description(oc, "merge", |
7eecec7d | 487 | "Mark memory as mergeable"); |
e62834ca EH |
488 | object_class_property_add_bool(oc, "dump", |
489 | host_memory_backend_get_dump, | |
d2623129 | 490 | host_memory_backend_set_dump); |
033bfc5e | 491 | object_class_property_set_description(oc, "dump", |
7eecec7d | 492 | "Set to 'off' to exclude from core dump"); |
e62834ca EH |
493 | object_class_property_add_bool(oc, "prealloc", |
494 | host_memory_backend_get_prealloc, | |
d2623129 | 495 | host_memory_backend_set_prealloc); |
033bfc5e | 496 | object_class_property_set_description(oc, "prealloc", |
7eecec7d | 497 | "Preallocate memory"); |
ffac16fa IM |
498 | object_class_property_add(oc, "prealloc-threads", "int", |
499 | host_memory_backend_get_prealloc_threads, | |
500 | host_memory_backend_set_prealloc_threads, | |
d2623129 | 501 | NULL, NULL); |
ffac16fa | 502 | object_class_property_set_description(oc, "prealloc-threads", |
7eecec7d | 503 | "Number of CPU threads to use for prealloc"); |
e6816458 DH |
504 | object_class_property_add_link(oc, "prealloc-context", |
505 | TYPE_THREAD_CONTEXT, offsetof(HostMemoryBackend, prealloc_context), | |
506 | object_property_allow_set_link, OBJ_PROP_LINK_STRONG); | |
507 | object_class_property_set_description(oc, "prealloc-context", | |
508 | "Context to use for creating CPU threads for preallocation"); | |
e62834ca EH |
509 | object_class_property_add(oc, "size", "int", |
510 | host_memory_backend_get_size, | |
511 | host_memory_backend_set_size, | |
d2623129 | 512 | NULL, NULL); |
033bfc5e | 513 | object_class_property_set_description(oc, "size", |
7eecec7d | 514 | "Size of the memory region (ex: 500M)"); |
e62834ca EH |
515 | object_class_property_add(oc, "host-nodes", "int", |
516 | host_memory_backend_get_host_nodes, | |
517 | host_memory_backend_set_host_nodes, | |
d2623129 | 518 | NULL, NULL); |
033bfc5e | 519 | object_class_property_set_description(oc, "host-nodes", |
7eecec7d | 520 | "Binds memory to the list of NUMA host nodes"); |
e62834ca | 521 | object_class_property_add_enum(oc, "policy", "HostMemPolicy", |
f7abe0ec | 522 | &HostMemPolicy_lookup, |
e62834ca | 523 | host_memory_backend_get_policy, |
d2623129 | 524 | host_memory_backend_set_policy); |
033bfc5e | 525 | object_class_property_set_description(oc, "policy", |
7eecec7d | 526 | "Set the NUMA policy"); |
06329cce | 527 | object_class_property_add_bool(oc, "share", |
d2623129 | 528 | host_memory_backend_get_share, host_memory_backend_set_share); |
033bfc5e | 529 | object_class_property_set_description(oc, "share", |
7eecec7d | 530 | "Mark the memory as private to QEMU or shared"); |
9181fb70 DH |
531 | #ifdef CONFIG_LINUX |
532 | object_class_property_add_bool(oc, "reserve", | |
533 | host_memory_backend_get_reserve, host_memory_backend_set_reserve); | |
534 | object_class_property_set_description(oc, "reserve", | |
535 | "Reserve swap space (or huge pages) if applicable"); | |
536 | #endif /* CONFIG_LINUX */ | |
8db0b204 IM |
537 | /* |
538 | * Do not delete/rename option. This option must be considered stable | |
539 | * (as if it didn't have the 'x-' prefix including deprecation period) as | |
540 | * long as 4.0 and older machine types exists. | |
541 | * Option will be used by upper layers to override (disable) canonical path | |
542 | * for ramblock-id set by compat properties on old machine types ( <= 4.0), | |
543 | * to keep migration working when backend is used for main RAM with | |
544 | * -machine memory-backend= option (main RAM historically used prefix-less | |
545 | * ramblock-id). | |
546 | */ | |
fa0cb34d MAL |
547 | object_class_property_add_bool(oc, "x-use-canonical-path-for-ramblock-id", |
548 | host_memory_backend_get_use_canonical_path, | |
d2623129 | 549 | host_memory_backend_set_use_canonical_path); |
e1ff3c67 IM |
550 | } |
551 | ||
58f4662c | 552 | static const TypeInfo host_memory_backend_info = { |
1f070489 IM |
553 | .name = TYPE_MEMORY_BACKEND, |
554 | .parent = TYPE_OBJECT, | |
555 | .abstract = true, | |
556 | .class_size = sizeof(HostMemoryBackendClass), | |
bd9262d9 | 557 | .class_init = host_memory_backend_class_init, |
1f070489 | 558 | .instance_size = sizeof(HostMemoryBackend), |
58f4662c | 559 | .instance_init = host_memory_backend_init, |
fa0cb34d | 560 | .instance_post_init = host_memory_backend_post_init, |
1f070489 IM |
561 | .interfaces = (InterfaceInfo[]) { |
562 | { TYPE_USER_CREATABLE }, | |
563 | { } | |
564 | } | |
565 | }; | |
566 | ||
567 | static void register_types(void) | |
568 | { | |
58f4662c | 569 | type_register_static(&host_memory_backend_info); |
1f070489 IM |
570 | } |
571 | ||
572 | type_init(register_types); |