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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" |
04accf43 | 23 | #include "hw/qdev-core.h" |
1f070489 | 24 | |
4cf1b76b HT |
25 | #ifdef CONFIG_NUMA |
26 | #include <numaif.h> | |
6bb613f0 | 27 | #include <numa.h> |
4cf1b76b | 28 | QEMU_BUILD_BUG_ON(HOST_MEM_POLICY_DEFAULT != MPOL_DEFAULT); |
6bb613f0 MP |
29 | /* |
30 | * HOST_MEM_POLICY_PREFERRED may either translate to MPOL_PREFERRED or | |
31 | * MPOL_PREFERRED_MANY, see comments further below. | |
32 | */ | |
4cf1b76b HT |
33 | QEMU_BUILD_BUG_ON(HOST_MEM_POLICY_PREFERRED != MPOL_PREFERRED); |
34 | QEMU_BUILD_BUG_ON(HOST_MEM_POLICY_BIND != MPOL_BIND); | |
35 | QEMU_BUILD_BUG_ON(HOST_MEM_POLICY_INTERLEAVE != MPOL_INTERLEAVE); | |
36 | #endif | |
37 | ||
fa0cb34d MAL |
38 | char * |
39 | host_memory_backend_get_name(HostMemoryBackend *backend) | |
40 | { | |
41 | if (!backend->use_canonical_path) { | |
7a309cc9 | 42 | return g_strdup(object_get_canonical_path_component(OBJECT(backend))); |
fa0cb34d MAL |
43 | } |
44 | ||
45 | return object_get_canonical_path(OBJECT(backend)); | |
46 | } | |
47 | ||
1f070489 | 48 | static void |
d7bce999 EB |
49 | host_memory_backend_get_size(Object *obj, Visitor *v, const char *name, |
50 | void *opaque, Error **errp) | |
1f070489 IM |
51 | { |
52 | HostMemoryBackend *backend = MEMORY_BACKEND(obj); | |
53 | uint64_t value = backend->size; | |
54 | ||
51e72bc1 | 55 | visit_type_size(v, name, &value, errp); |
1f070489 IM |
56 | } |
57 | ||
58 | static void | |
d7bce999 EB |
59 | host_memory_backend_set_size(Object *obj, Visitor *v, const char *name, |
60 | void *opaque, Error **errp) | |
1f070489 IM |
61 | { |
62 | HostMemoryBackend *backend = MEMORY_BACKEND(obj); | |
1f070489 IM |
63 | uint64_t value; |
64 | ||
6f4c60e4 | 65 | if (host_memory_backend_mr_inited(backend)) { |
dcfe4805 MA |
66 | error_setg(errp, "cannot change property %s of %s ", name, |
67 | object_get_typename(obj)); | |
68 | return; | |
1f070489 IM |
69 | } |
70 | ||
668f62ec | 71 | if (!visit_type_size(v, name, &value, errp)) { |
dcfe4805 | 72 | return; |
1f070489 IM |
73 | } |
74 | if (!value) { | |
dcfe4805 | 75 | error_setg(errp, |
21d16836 ZY |
76 | "property '%s' of %s doesn't take value '%" PRIu64 "'", |
77 | name, object_get_typename(obj), value); | |
dcfe4805 | 78 | return; |
1f070489 IM |
79 | } |
80 | backend->size = value; | |
1f070489 IM |
81 | } |
82 | ||
4cf1b76b | 83 | static void |
d7bce999 EB |
84 | host_memory_backend_get_host_nodes(Object *obj, Visitor *v, const char *name, |
85 | void *opaque, Error **errp) | |
4cf1b76b HT |
86 | { |
87 | HostMemoryBackend *backend = MEMORY_BACKEND(obj); | |
88 | uint16List *host_nodes = NULL; | |
c3033fd3 | 89 | uint16List **tail = &host_nodes; |
4cf1b76b HT |
90 | unsigned long value; |
91 | ||
92 | value = find_first_bit(backend->host_nodes, MAX_NODES); | |
93 | if (value == MAX_NODES) { | |
15160ab7 | 94 | goto ret; |
4cf1b76b HT |
95 | } |
96 | ||
c3033fd3 | 97 | QAPI_LIST_APPEND(tail, value); |
658ae5a7 | 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 | ||
c3033fd3 | 105 | QAPI_LIST_APPEND(tail, value); |
4cf1b76b HT |
106 | } while (true); |
107 | ||
15160ab7 | 108 | ret: |
51e72bc1 | 109 | visit_type_uint16List(v, name, &host_nodes, errp); |
bdd5ce05 | 110 | qapi_free_uint16List(host_nodes); |
4cf1b76b HT |
111 | } |
112 | ||
113 | static void | |
d7bce999 EB |
114 | host_memory_backend_set_host_nodes(Object *obj, Visitor *v, const char *name, |
115 | void *opaque, Error **errp) | |
4cf1b76b HT |
116 | { |
117 | #ifdef CONFIG_NUMA | |
118 | HostMemoryBackend *backend = MEMORY_BACKEND(obj); | |
ffa144b3 | 119 | uint16List *l, *host_nodes = NULL; |
4cf1b76b | 120 | |
ffa144b3 EH |
121 | visit_type_uint16List(v, name, &host_nodes, errp); |
122 | ||
123 | for (l = host_nodes; l; l = l->next) { | |
124 | if (l->value >= MAX_NODES) { | |
125 | error_setg(errp, "Invalid host-nodes value: %d", l->value); | |
126 | goto out; | |
127 | } | |
128 | } | |
4cf1b76b | 129 | |
ffa144b3 | 130 | for (l = host_nodes; l; l = l->next) { |
4cf1b76b | 131 | bitmap_set(backend->host_nodes, l->value, 1); |
4cf1b76b | 132 | } |
ffa144b3 EH |
133 | |
134 | out: | |
135 | qapi_free_uint16List(host_nodes); | |
4cf1b76b HT |
136 | #else |
137 | error_setg(errp, "NUMA node binding are not supported by this QEMU"); | |
138 | #endif | |
139 | } | |
140 | ||
a3590dac DB |
141 | static int |
142 | host_memory_backend_get_policy(Object *obj, Error **errp G_GNUC_UNUSED) | |
4cf1b76b HT |
143 | { |
144 | HostMemoryBackend *backend = MEMORY_BACKEND(obj); | |
a3590dac | 145 | return backend->policy; |
4cf1b76b HT |
146 | } |
147 | ||
148 | static void | |
a3590dac | 149 | host_memory_backend_set_policy(Object *obj, int policy, Error **errp) |
4cf1b76b HT |
150 | { |
151 | HostMemoryBackend *backend = MEMORY_BACKEND(obj); | |
4cf1b76b HT |
152 | backend->policy = policy; |
153 | ||
154 | #ifndef CONFIG_NUMA | |
155 | if (policy != HOST_MEM_POLICY_DEFAULT) { | |
156 | error_setg(errp, "NUMA policies are not supported by this QEMU"); | |
157 | } | |
158 | #endif | |
159 | } | |
160 | ||
605d0a94 PB |
161 | static bool host_memory_backend_get_merge(Object *obj, Error **errp) |
162 | { | |
163 | HostMemoryBackend *backend = MEMORY_BACKEND(obj); | |
164 | ||
165 | return backend->merge; | |
166 | } | |
167 | ||
168 | static void host_memory_backend_set_merge(Object *obj, bool value, Error **errp) | |
169 | { | |
170 | HostMemoryBackend *backend = MEMORY_BACKEND(obj); | |
171 | ||
6f4c60e4 | 172 | if (!host_memory_backend_mr_inited(backend)) { |
605d0a94 PB |
173 | backend->merge = value; |
174 | return; | |
175 | } | |
176 | ||
177 | if (value != backend->merge) { | |
178 | void *ptr = memory_region_get_ram_ptr(&backend->mr); | |
179 | uint64_t sz = memory_region_size(&backend->mr); | |
180 | ||
181 | qemu_madvise(ptr, sz, | |
182 | value ? QEMU_MADV_MERGEABLE : QEMU_MADV_UNMERGEABLE); | |
183 | backend->merge = value; | |
184 | } | |
185 | } | |
186 | ||
187 | static bool host_memory_backend_get_dump(Object *obj, Error **errp) | |
188 | { | |
189 | HostMemoryBackend *backend = MEMORY_BACKEND(obj); | |
190 | ||
191 | return backend->dump; | |
192 | } | |
193 | ||
194 | static void host_memory_backend_set_dump(Object *obj, bool value, Error **errp) | |
195 | { | |
196 | HostMemoryBackend *backend = MEMORY_BACKEND(obj); | |
197 | ||
6f4c60e4 | 198 | if (!host_memory_backend_mr_inited(backend)) { |
605d0a94 PB |
199 | backend->dump = value; |
200 | return; | |
201 | } | |
202 | ||
203 | if (value != backend->dump) { | |
204 | void *ptr = memory_region_get_ram_ptr(&backend->mr); | |
205 | uint64_t sz = memory_region_size(&backend->mr); | |
206 | ||
207 | qemu_madvise(ptr, sz, | |
208 | value ? QEMU_MADV_DODUMP : QEMU_MADV_DONTDUMP); | |
209 | backend->dump = value; | |
210 | } | |
211 | } | |
212 | ||
a35ba7be PB |
213 | static bool host_memory_backend_get_prealloc(Object *obj, Error **errp) |
214 | { | |
215 | HostMemoryBackend *backend = MEMORY_BACKEND(obj); | |
216 | ||
4ebc74db | 217 | return backend->prealloc; |
a35ba7be PB |
218 | } |
219 | ||
220 | static void host_memory_backend_set_prealloc(Object *obj, bool value, | |
221 | Error **errp) | |
222 | { | |
223 | HostMemoryBackend *backend = MEMORY_BACKEND(obj); | |
224 | ||
9181fb70 DH |
225 | if (!backend->reserve && value) { |
226 | error_setg(errp, "'prealloc=on' and 'reserve=off' are incompatible"); | |
227 | return; | |
228 | } | |
229 | ||
6f4c60e4 | 230 | if (!host_memory_backend_mr_inited(backend)) { |
a35ba7be PB |
231 | backend->prealloc = value; |
232 | return; | |
233 | } | |
234 | ||
235 | if (value && !backend->prealloc) { | |
236 | int fd = memory_region_get_fd(&backend->mr); | |
237 | void *ptr = memory_region_get_ram_ptr(&backend->mr); | |
238 | uint64_t sz = memory_region_size(&backend->mr); | |
239 | ||
9c878ad6 | 240 | if (!qemu_prealloc_mem(fd, ptr, sz, backend->prealloc_threads, |
04accf43 | 241 | backend->prealloc_context, false, errp)) { |
056b68af IM |
242 | return; |
243 | } | |
a35ba7be PB |
244 | backend->prealloc = true; |
245 | } | |
246 | } | |
247 | ||
ffac16fa IM |
248 | static void host_memory_backend_get_prealloc_threads(Object *obj, Visitor *v, |
249 | const char *name, void *opaque, Error **errp) | |
250 | { | |
251 | HostMemoryBackend *backend = MEMORY_BACKEND(obj); | |
252 | visit_type_uint32(v, name, &backend->prealloc_threads, errp); | |
253 | } | |
254 | ||
255 | static void host_memory_backend_set_prealloc_threads(Object *obj, Visitor *v, | |
256 | const char *name, void *opaque, Error **errp) | |
257 | { | |
258 | HostMemoryBackend *backend = MEMORY_BACKEND(obj); | |
ffac16fa IM |
259 | uint32_t value; |
260 | ||
668f62ec | 261 | if (!visit_type_uint32(v, name, &value, errp)) { |
dcfe4805 | 262 | return; |
ffac16fa IM |
263 | } |
264 | if (value <= 0) { | |
dcfe4805 MA |
265 | error_setg(errp, "property '%s' of %s doesn't take value '%d'", name, |
266 | object_get_typename(obj), value); | |
267 | return; | |
ffac16fa IM |
268 | } |
269 | backend->prealloc_threads = value; | |
ffac16fa IM |
270 | } |
271 | ||
58f4662c | 272 | static void host_memory_backend_init(Object *obj) |
1f070489 | 273 | { |
605d0a94 | 274 | HostMemoryBackend *backend = MEMORY_BACKEND(obj); |
6b269967 | 275 | MachineState *machine = MACHINE(qdev_get_machine()); |
605d0a94 | 276 | |
ffac16fa | 277 | /* TODO: convert access to globals to compat properties */ |
6b269967 EH |
278 | backend->merge = machine_mem_merge(machine); |
279 | backend->dump = machine_dump_guest_core(machine); | |
37662d85 | 280 | backend->guest_memfd = machine_require_guest_memfd(machine); |
9181fb70 | 281 | backend->reserve = true; |
f8d426a6 | 282 | backend->prealloc_threads = machine->smp.cpus; |
1f070489 IM |
283 | } |
284 | ||
fa0cb34d MAL |
285 | static void host_memory_backend_post_init(Object *obj) |
286 | { | |
287 | object_apply_compat_props(obj); | |
288 | } | |
289 | ||
4728b574 PX |
290 | bool host_memory_backend_mr_inited(HostMemoryBackend *backend) |
291 | { | |
292 | /* | |
293 | * NOTE: We forbid zero-length memory backend, so here zero means | |
294 | * "we haven't inited the backend memory region yet". | |
295 | */ | |
296 | return memory_region_size(&backend->mr) != 0; | |
297 | } | |
298 | ||
7943e97b | 299 | MemoryRegion *host_memory_backend_get_memory(HostMemoryBackend *backend) |
1f070489 | 300 | { |
6f4c60e4 | 301 | return host_memory_backend_mr_inited(backend) ? &backend->mr : NULL; |
1f070489 IM |
302 | } |
303 | ||
2aece63c XG |
304 | void host_memory_backend_set_mapped(HostMemoryBackend *backend, bool mapped) |
305 | { | |
306 | backend->is_mapped = mapped; | |
307 | } | |
308 | ||
309 | bool host_memory_backend_is_mapped(HostMemoryBackend *backend) | |
310 | { | |
311 | return backend->is_mapped; | |
312 | } | |
313 | ||
2b108085 DG |
314 | size_t host_memory_backend_pagesize(HostMemoryBackend *memdev) |
315 | { | |
8be934b7 TH |
316 | size_t pagesize = qemu_ram_pagesize(memdev->mr.ram_block); |
317 | g_assert(pagesize >= qemu_real_host_page_size()); | |
2b108085 DG |
318 | return pagesize; |
319 | } | |
2b108085 | 320 | |
bd9262d9 HT |
321 | static void |
322 | host_memory_backend_memory_complete(UserCreatable *uc, Error **errp) | |
323 | { | |
324 | HostMemoryBackend *backend = MEMORY_BACKEND(uc); | |
325 | HostMemoryBackendClass *bc = MEMORY_BACKEND_GET_CLASS(uc); | |
605d0a94 PB |
326 | void *ptr; |
327 | uint64_t sz; | |
04accf43 | 328 | bool async = !phase_check(PHASE_LATE_BACKENDS_CREATED); |
bd9262d9 | 329 | |
e199f7ad PMD |
330 | if (!bc->alloc) { |
331 | return; | |
332 | } | |
fdb63cf3 PMD |
333 | if (!bc->alloc(backend, errp)) { |
334 | return; | |
e199f7ad | 335 | } |
605d0a94 | 336 | |
e199f7ad PMD |
337 | ptr = memory_region_get_ram_ptr(&backend->mr); |
338 | sz = memory_region_size(&backend->mr); | |
605d0a94 | 339 | |
e199f7ad PMD |
340 | if (backend->merge) { |
341 | qemu_madvise(ptr, sz, QEMU_MADV_MERGEABLE); | |
342 | } | |
343 | if (!backend->dump) { | |
344 | qemu_madvise(ptr, sz, QEMU_MADV_DONTDUMP); | |
345 | } | |
4cf1b76b | 346 | #ifdef CONFIG_NUMA |
e199f7ad PMD |
347 | unsigned long lastbit = find_last_bit(backend->host_nodes, MAX_NODES); |
348 | /* lastbit == MAX_NODES means maxnode = 0 */ | |
349 | unsigned long maxnode = (lastbit + 1) % (MAX_NODES + 1); | |
93e08863 PMD |
350 | /* |
351 | * Ensure policy won't be ignored in case memory is preallocated | |
e199f7ad | 352 | * before mbind(). note: MPOL_MF_STRICT is ignored on hugepages so |
93e08863 PMD |
353 | * this doesn't catch hugepage case. |
354 | */ | |
e199f7ad PMD |
355 | unsigned flags = MPOL_MF_STRICT | MPOL_MF_MOVE; |
356 | int mode = backend->policy; | |
357 | ||
358 | /* check for invalid host-nodes and policies and give more verbose | |
359 | * error messages than mbind(). */ | |
360 | if (maxnode && backend->policy == MPOL_DEFAULT) { | |
361 | error_setg(errp, "host-nodes must be empty for policy default," | |
362 | " or you should explicitly specify a policy other" | |
363 | " than default"); | |
364 | return; | |
365 | } else if (maxnode == 0 && backend->policy != MPOL_DEFAULT) { | |
366 | error_setg(errp, "host-nodes must be set for policy %s", | |
367 | HostMemPolicy_str(backend->policy)); | |
368 | return; | |
369 | } | |
4cf1b76b | 370 | |
93e08863 PMD |
371 | /* |
372 | * We can have up to MAX_NODES nodes, but we need to pass maxnode+1 | |
e199f7ad PMD |
373 | * as argument to mbind() due to an old Linux bug (feature?) which |
374 | * cuts off the last specified node. This means backend->host_nodes | |
375 | * must have MAX_NODES+1 bits available. | |
376 | */ | |
377 | assert(sizeof(backend->host_nodes) >= | |
378 | BITS_TO_LONGS(MAX_NODES + 1) * sizeof(unsigned long)); | |
379 | assert(maxnode <= MAX_NODES); | |
70b6d525 | 380 | |
6bb613f0 | 381 | #ifdef HAVE_NUMA_HAS_PREFERRED_MANY |
e199f7ad PMD |
382 | if (mode == MPOL_PREFERRED && numa_has_preferred_many() > 0) { |
383 | /* | |
384 | * Replace with MPOL_PREFERRED_MANY otherwise the mbind() below | |
385 | * silently picks the first node. | |
386 | */ | |
387 | mode = MPOL_PREFERRED_MANY; | |
388 | } | |
6bb613f0 MP |
389 | #endif |
390 | ||
e199f7ad PMD |
391 | if (maxnode && |
392 | mbind(ptr, sz, mode, backend->host_nodes, maxnode + 1, flags)) { | |
393 | if (backend->policy != MPOL_DEFAULT || errno != ENOSYS) { | |
394 | error_setg_errno(errp, errno, | |
395 | "cannot bind memory to host NUMA nodes"); | |
396 | return; | |
4cf1b76b | 397 | } |
e199f7ad | 398 | } |
4cf1b76b | 399 | #endif |
93e08863 PMD |
400 | /* |
401 | * Preallocate memory after the NUMA policy has been instantiated. | |
e199f7ad PMD |
402 | * This is necessary to guarantee memory is allocated with |
403 | * specified NUMA policy in place. | |
404 | */ | |
9c878ad6 PMD |
405 | if (backend->prealloc && !qemu_prealloc_mem(memory_region_get_fd(&backend->mr), |
406 | ptr, sz, | |
407 | backend->prealloc_threads, | |
04accf43 MK |
408 | backend->prealloc_context, |
409 | async, errp)) { | |
9c878ad6 | 410 | return; |
bd9262d9 HT |
411 | } |
412 | } | |
413 | ||
36bce5ca | 414 | static bool |
3beacfb9 | 415 | host_memory_backend_can_be_deleted(UserCreatable *uc) |
36bce5ca | 416 | { |
2aece63c | 417 | if (host_memory_backend_is_mapped(MEMORY_BACKEND(uc))) { |
36bce5ca LM |
418 | return false; |
419 | } else { | |
420 | return true; | |
421 | } | |
422 | } | |
423 | ||
06329cce MA |
424 | static bool host_memory_backend_get_share(Object *o, Error **errp) |
425 | { | |
426 | HostMemoryBackend *backend = MEMORY_BACKEND(o); | |
427 | ||
428 | return backend->share; | |
429 | } | |
430 | ||
431 | static void host_memory_backend_set_share(Object *o, bool value, Error **errp) | |
432 | { | |
433 | HostMemoryBackend *backend = MEMORY_BACKEND(o); | |
434 | ||
435 | if (host_memory_backend_mr_inited(backend)) { | |
436 | error_setg(errp, "cannot change property value"); | |
437 | return; | |
438 | } | |
439 | backend->share = value; | |
440 | } | |
441 | ||
9181fb70 DH |
442 | #ifdef CONFIG_LINUX |
443 | static bool host_memory_backend_get_reserve(Object *o, Error **errp) | |
444 | { | |
445 | HostMemoryBackend *backend = MEMORY_BACKEND(o); | |
446 | ||
447 | return backend->reserve; | |
448 | } | |
449 | ||
450 | static void host_memory_backend_set_reserve(Object *o, bool value, Error **errp) | |
451 | { | |
452 | HostMemoryBackend *backend = MEMORY_BACKEND(o); | |
453 | ||
454 | if (host_memory_backend_mr_inited(backend)) { | |
455 | error_setg(errp, "cannot change property value"); | |
456 | return; | |
457 | } | |
458 | if (backend->prealloc && !value) { | |
459 | error_setg(errp, "'prealloc=on' and 'reserve=off' are incompatible"); | |
460 | return; | |
461 | } | |
462 | backend->reserve = value; | |
463 | } | |
464 | #endif /* CONFIG_LINUX */ | |
465 | ||
fa0cb34d MAL |
466 | static bool |
467 | host_memory_backend_get_use_canonical_path(Object *obj, Error **errp) | |
468 | { | |
469 | HostMemoryBackend *backend = MEMORY_BACKEND(obj); | |
470 | ||
471 | return backend->use_canonical_path; | |
472 | } | |
473 | ||
474 | static void | |
475 | host_memory_backend_set_use_canonical_path(Object *obj, bool value, | |
476 | Error **errp) | |
477 | { | |
478 | HostMemoryBackend *backend = MEMORY_BACKEND(obj); | |
479 | ||
480 | backend->use_canonical_path = value; | |
481 | } | |
482 | ||
bd9262d9 HT |
483 | static void |
484 | host_memory_backend_class_init(ObjectClass *oc, void *data) | |
485 | { | |
486 | UserCreatableClass *ucc = USER_CREATABLE_CLASS(oc); | |
487 | ||
488 | ucc->complete = host_memory_backend_memory_complete; | |
36bce5ca | 489 | ucc->can_be_deleted = host_memory_backend_can_be_deleted; |
e62834ca EH |
490 | |
491 | object_class_property_add_bool(oc, "merge", | |
492 | host_memory_backend_get_merge, | |
d2623129 | 493 | host_memory_backend_set_merge); |
033bfc5e | 494 | object_class_property_set_description(oc, "merge", |
7eecec7d | 495 | "Mark memory as mergeable"); |
e62834ca EH |
496 | object_class_property_add_bool(oc, "dump", |
497 | host_memory_backend_get_dump, | |
d2623129 | 498 | host_memory_backend_set_dump); |
033bfc5e | 499 | object_class_property_set_description(oc, "dump", |
7eecec7d | 500 | "Set to 'off' to exclude from core dump"); |
e62834ca EH |
501 | object_class_property_add_bool(oc, "prealloc", |
502 | host_memory_backend_get_prealloc, | |
d2623129 | 503 | host_memory_backend_set_prealloc); |
033bfc5e | 504 | object_class_property_set_description(oc, "prealloc", |
7eecec7d | 505 | "Preallocate memory"); |
ffac16fa IM |
506 | object_class_property_add(oc, "prealloc-threads", "int", |
507 | host_memory_backend_get_prealloc_threads, | |
508 | host_memory_backend_set_prealloc_threads, | |
d2623129 | 509 | NULL, NULL); |
ffac16fa | 510 | object_class_property_set_description(oc, "prealloc-threads", |
7eecec7d | 511 | "Number of CPU threads to use for prealloc"); |
e6816458 DH |
512 | object_class_property_add_link(oc, "prealloc-context", |
513 | TYPE_THREAD_CONTEXT, offsetof(HostMemoryBackend, prealloc_context), | |
514 | object_property_allow_set_link, OBJ_PROP_LINK_STRONG); | |
515 | object_class_property_set_description(oc, "prealloc-context", | |
516 | "Context to use for creating CPU threads for preallocation"); | |
e62834ca EH |
517 | object_class_property_add(oc, "size", "int", |
518 | host_memory_backend_get_size, | |
519 | host_memory_backend_set_size, | |
d2623129 | 520 | NULL, NULL); |
033bfc5e | 521 | object_class_property_set_description(oc, "size", |
7eecec7d | 522 | "Size of the memory region (ex: 500M)"); |
e62834ca EH |
523 | object_class_property_add(oc, "host-nodes", "int", |
524 | host_memory_backend_get_host_nodes, | |
525 | host_memory_backend_set_host_nodes, | |
d2623129 | 526 | NULL, NULL); |
033bfc5e | 527 | object_class_property_set_description(oc, "host-nodes", |
7eecec7d | 528 | "Binds memory to the list of NUMA host nodes"); |
e62834ca | 529 | object_class_property_add_enum(oc, "policy", "HostMemPolicy", |
f7abe0ec | 530 | &HostMemPolicy_lookup, |
e62834ca | 531 | host_memory_backend_get_policy, |
d2623129 | 532 | host_memory_backend_set_policy); |
033bfc5e | 533 | object_class_property_set_description(oc, "policy", |
7eecec7d | 534 | "Set the NUMA policy"); |
06329cce | 535 | object_class_property_add_bool(oc, "share", |
d2623129 | 536 | host_memory_backend_get_share, host_memory_backend_set_share); |
033bfc5e | 537 | object_class_property_set_description(oc, "share", |
7eecec7d | 538 | "Mark the memory as private to QEMU or shared"); |
9181fb70 DH |
539 | #ifdef CONFIG_LINUX |
540 | object_class_property_add_bool(oc, "reserve", | |
541 | host_memory_backend_get_reserve, host_memory_backend_set_reserve); | |
542 | object_class_property_set_description(oc, "reserve", | |
543 | "Reserve swap space (or huge pages) if applicable"); | |
544 | #endif /* CONFIG_LINUX */ | |
8db0b204 IM |
545 | /* |
546 | * Do not delete/rename option. This option must be considered stable | |
547 | * (as if it didn't have the 'x-' prefix including deprecation period) as | |
548 | * long as 4.0 and older machine types exists. | |
549 | * Option will be used by upper layers to override (disable) canonical path | |
550 | * for ramblock-id set by compat properties on old machine types ( <= 4.0), | |
551 | * to keep migration working when backend is used for main RAM with | |
552 | * -machine memory-backend= option (main RAM historically used prefix-less | |
553 | * ramblock-id). | |
554 | */ | |
fa0cb34d MAL |
555 | object_class_property_add_bool(oc, "x-use-canonical-path-for-ramblock-id", |
556 | host_memory_backend_get_use_canonical_path, | |
d2623129 | 557 | host_memory_backend_set_use_canonical_path); |
e1ff3c67 IM |
558 | } |
559 | ||
58f4662c | 560 | static const TypeInfo host_memory_backend_info = { |
1f070489 IM |
561 | .name = TYPE_MEMORY_BACKEND, |
562 | .parent = TYPE_OBJECT, | |
563 | .abstract = true, | |
564 | .class_size = sizeof(HostMemoryBackendClass), | |
bd9262d9 | 565 | .class_init = host_memory_backend_class_init, |
1f070489 | 566 | .instance_size = sizeof(HostMemoryBackend), |
58f4662c | 567 | .instance_init = host_memory_backend_init, |
fa0cb34d | 568 | .instance_post_init = host_memory_backend_post_init, |
1f070489 IM |
569 | .interfaces = (InterfaceInfo[]) { |
570 | { TYPE_USER_CREATABLE }, | |
571 | { } | |
572 | } | |
573 | }; | |
574 | ||
575 | static void register_types(void) | |
576 | { | |
58f4662c | 577 | type_register_static(&host_memory_backend_info); |
1f070489 IM |
578 | } |
579 | ||
580 | type_init(register_types); |