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25#include "qemu/osdep.h"
26#include "sysemu/numa.h"
27#include "exec/cpu-common.h"
28#include "exec/ramlist.h"
29#include "qemu/bitmap.h"
30#include "qom/cpu.h"
31#include "qemu/error-report.h"
32#include "qapi/error.h"
33#include "qapi/opts-visitor.h"
34#include "qapi/qapi-commands-misc.h"
35#include "qapi/qapi-visit-misc.h"
36#include "hw/boards.h"
37#include "sysemu/hostmem.h"
38#include "hw/mem/pc-dimm.h"
39#include "qemu/option.h"
40#include "qemu/config-file.h"
41#include "qemu/cutils.h"
42
43QemuOptsList qemu_numa_opts = {
44 .name = "numa",
45 .implied_opt_name = "type",
46 .head = QTAILQ_HEAD_INITIALIZER(qemu_numa_opts.head),
47 .desc = { { 0 } }
48};
49
50static int have_memdevs = -1;
51static int max_numa_nodeid;
52
53
54int nb_numa_nodes;
55bool have_numa_distance;
56NodeInfo numa_info[MAX_NODES];
57
58
59static void parse_numa_node(MachineState *ms, NumaNodeOptions *node,
60 Error **errp)
61{
62 uint16_t nodenr;
63 uint16List *cpus = NULL;
64 MachineClass *mc = MACHINE_GET_CLASS(ms);
65
66 if (node->has_nodeid) {
67 nodenr = node->nodeid;
68 } else {
69 nodenr = nb_numa_nodes;
70 }
71
72 if (nodenr >= MAX_NODES) {
73 error_setg(errp, "Max number of NUMA nodes reached: %"
74 PRIu16 "", nodenr);
75 return;
76 }
77
78 if (numa_info[nodenr].present) {
79 error_setg(errp, "Duplicate NUMA nodeid: %" PRIu16, nodenr);
80 return;
81 }
82
83 if (!mc->cpu_index_to_instance_props || !mc->get_default_cpu_node_id) {
84 error_report("NUMA is not supported by this machine-type");
85 exit(1);
86 }
87 for (cpus = node->cpus; cpus; cpus = cpus->next) {
88 CpuInstanceProperties props;
89 if (cpus->value >= max_cpus) {
90 error_setg(errp,
91 "CPU index (%" PRIu16 ")"
92 " should be smaller than maxcpus (%d)",
93 cpus->value, max_cpus);
94 return;
95 }
96 props = mc->cpu_index_to_instance_props(ms, cpus->value);
97 props.node_id = nodenr;
98 props.has_node_id = true;
99 machine_set_cpu_numa_node(ms, &props, &error_fatal);
100 }
101
102 if (node->has_mem && node->has_memdev) {
103 error_setg(errp, "cannot specify both mem= and memdev=");
104 return;
105 }
106
107 if (have_memdevs == -1) {
108 have_memdevs = node->has_memdev;
109 }
110 if (node->has_memdev != have_memdevs) {
111 error_setg(errp, "memdev option must be specified for either "
112 "all or no nodes");
113 return;
114 }
115
116 if (node->has_mem) {
117 numa_info[nodenr].node_mem = node->mem;
118 }
119 if (node->has_memdev) {
120 Object *o;
121 o = object_resolve_path_type(node->memdev, TYPE_MEMORY_BACKEND, NULL);
122 if (!o) {
123 error_setg(errp, "memdev=%s is ambiguous", node->memdev);
124 return;
125 }
126
127 object_ref(o);
128 numa_info[nodenr].node_mem = object_property_get_uint(o, "size", NULL);
129 numa_info[nodenr].node_memdev = MEMORY_BACKEND(o);
130 }
131 numa_info[nodenr].present = true;
132 max_numa_nodeid = MAX(max_numa_nodeid, nodenr + 1);
133 nb_numa_nodes++;
134}
135
136static void parse_numa_distance(NumaDistOptions *dist, Error **errp)
137{
138 uint16_t src = dist->src;
139 uint16_t dst = dist->dst;
140 uint8_t val = dist->val;
141
142 if (src >= MAX_NODES || dst >= MAX_NODES) {
143 error_setg(errp,
144 "Invalid node %d, max possible could be %d",
145 MAX(src, dst), MAX_NODES);
146 return;
147 }
148
149 if (!numa_info[src].present || !numa_info[dst].present) {
150 error_setg(errp, "Source/Destination NUMA node is missing. "
151 "Please use '-numa node' option to declare it first.");
152 return;
153 }
154
155 if (val < NUMA_DISTANCE_MIN) {
156 error_setg(errp, "NUMA distance (%" PRIu8 ") is invalid, "
157 "it shouldn't be less than %d.",
158 val, NUMA_DISTANCE_MIN);
159 return;
160 }
161
162 if (src == dst && val != NUMA_DISTANCE_MIN) {
163 error_setg(errp, "Local distance of node %d should be %d.",
164 src, NUMA_DISTANCE_MIN);
165 return;
166 }
167
168 numa_info[src].distance[dst] = val;
169 have_numa_distance = true;
170}
171
172static int parse_numa(void *opaque, QemuOpts *opts, Error **errp)
173{
174 NumaOptions *object = NULL;
175 MachineState *ms = opaque;
176 Error *err = NULL;
177
178 {
179 Visitor *v = opts_visitor_new(opts);
180 visit_type_NumaOptions(v, NULL, &object, &err);
181 visit_free(v);
182 }
183
184 if (err) {
185 goto end;
186 }
187
188
189 if ((object->type == NUMA_OPTIONS_TYPE_NODE) && object->u.node.has_mem) {
190 const char *mem_str = qemu_opt_get(opts, "mem");
191 qemu_strtosz_MiB(mem_str, NULL, &object->u.node.mem);
192 }
193
194 switch (object->type) {
195 case NUMA_OPTIONS_TYPE_NODE:
196 parse_numa_node(ms, &object->u.node, &err);
197 if (err) {
198 goto end;
199 }
200 break;
201 case NUMA_OPTIONS_TYPE_DIST:
202 parse_numa_distance(&object->u.dist, &err);
203 if (err) {
204 goto end;
205 }
206 break;
207 case NUMA_OPTIONS_TYPE_CPU:
208 if (!object->u.cpu.has_node_id) {
209 error_setg(&err, "Missing mandatory node-id property");
210 goto end;
211 }
212 if (!numa_info[object->u.cpu.node_id].present) {
213 error_setg(&err, "Invalid node-id=%" PRId64 ", NUMA node must be "
214 "defined with -numa node,nodeid=ID before it's used with "
215 "-numa cpu,node-id=ID", object->u.cpu.node_id);
216 goto end;
217 }
218
219 machine_set_cpu_numa_node(ms, qapi_NumaCpuOptions_base(&object->u.cpu),
220 &err);
221 break;
222 default:
223 abort();
224 }
225
226end:
227 qapi_free_NumaOptions(object);
228 if (err) {
229 error_report_err(err);
230 return -1;
231 }
232
233 return 0;
234}
235
236
237
238
239
240
241
242static void validate_numa_distance(void)
243{
244 int src, dst;
245 bool is_asymmetrical = false;
246
247 for (src = 0; src < nb_numa_nodes; src++) {
248 for (dst = src; dst < nb_numa_nodes; dst++) {
249 if (numa_info[src].distance[dst] == 0 &&
250 numa_info[dst].distance[src] == 0) {
251 if (src != dst) {
252 error_report("The distance between node %d and %d is "
253 "missing, at least one distance value "
254 "between each nodes should be provided.",
255 src, dst);
256 exit(EXIT_FAILURE);
257 }
258 }
259
260 if (numa_info[src].distance[dst] != 0 &&
261 numa_info[dst].distance[src] != 0 &&
262 numa_info[src].distance[dst] !=
263 numa_info[dst].distance[src]) {
264 is_asymmetrical = true;
265 }
266 }
267 }
268
269 if (is_asymmetrical) {
270 for (src = 0; src < nb_numa_nodes; src++) {
271 for (dst = 0; dst < nb_numa_nodes; dst++) {
272 if (src != dst && numa_info[src].distance[dst] == 0) {
273 error_report("At least one asymmetrical pair of "
274 "distances is given, please provide distances "
275 "for both directions of all node pairs.");
276 exit(EXIT_FAILURE);
277 }
278 }
279 }
280 }
281}
282
283static void complete_init_numa_distance(void)
284{
285 int src, dst;
286
287
288
289
290
291
292 for (src = 0; src < nb_numa_nodes; src++) {
293 for (dst = 0; dst < nb_numa_nodes; dst++) {
294 if (numa_info[src].distance[dst] == 0) {
295 if (src == dst) {
296 numa_info[src].distance[dst] = NUMA_DISTANCE_MIN;
297 } else {
298 numa_info[src].distance[dst] = numa_info[dst].distance[src];
299 }
300 }
301 }
302 }
303}
304
305void numa_legacy_auto_assign_ram(MachineClass *mc, NodeInfo *nodes,
306 int nb_nodes, ram_addr_t size)
307{
308 int i;
309 uint64_t usedmem = 0;
310
311
312
313
314
315 for (i = 0; i < nb_nodes - 1; i++) {
316 nodes[i].node_mem = (size / nb_nodes) &
317 ~((1 << mc->numa_mem_align_shift) - 1);
318 usedmem += nodes[i].node_mem;
319 }
320 nodes[i].node_mem = size - usedmem;
321}
322
323void numa_default_auto_assign_ram(MachineClass *mc, NodeInfo *nodes,
324 int nb_nodes, ram_addr_t size)
325{
326 int i;
327 uint64_t usedmem = 0, node_mem;
328 uint64_t granularity = size / nb_nodes;
329 uint64_t propagate = 0;
330
331 for (i = 0; i < nb_nodes - 1; i++) {
332 node_mem = (granularity + propagate) &
333 ~((1 << mc->numa_mem_align_shift) - 1);
334 propagate = granularity + propagate - node_mem;
335 nodes[i].node_mem = node_mem;
336 usedmem += node_mem;
337 }
338 nodes[i].node_mem = size - usedmem;
339}
340
341void parse_numa_opts(MachineState *ms)
342{
343 int i;
344 MachineClass *mc = MACHINE_GET_CLASS(ms);
345
346 if (qemu_opts_foreach(qemu_find_opts("numa"), parse_numa, ms, NULL)) {
347 exit(1);
348 }
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363 if (ms->ram_slots > 0 && nb_numa_nodes == 0 &&
364 mc->auto_enable_numa_with_memhp) {
365 NumaNodeOptions node = { };
366 parse_numa_node(ms, &node, NULL);
367 }
368
369 assert(max_numa_nodeid <= MAX_NODES);
370
371
372 for (i = max_numa_nodeid - 1; i >= 0; i--) {
373
374 if (!numa_info[i].present) {
375 error_report("numa: Node ID missing: %d", i);
376 exit(1);
377 }
378 }
379
380
381 assert(nb_numa_nodes == max_numa_nodeid);
382
383 if (nb_numa_nodes > 0) {
384 uint64_t numa_total;
385
386 if (nb_numa_nodes > MAX_NODES) {
387 nb_numa_nodes = MAX_NODES;
388 }
389
390
391
392
393 for (i = 0; i < nb_numa_nodes; i++) {
394 if (numa_info[i].node_mem != 0) {
395 break;
396 }
397 }
398 if (i == nb_numa_nodes) {
399 assert(mc->numa_auto_assign_ram);
400 mc->numa_auto_assign_ram(mc, numa_info, nb_numa_nodes, ram_size);
401 }
402
403 numa_total = 0;
404 for (i = 0; i < nb_numa_nodes; i++) {
405 numa_total += numa_info[i].node_mem;
406 }
407 if (numa_total != ram_size) {
408 error_report("total memory for NUMA nodes (0x%" PRIx64 ")"
409 " should equal RAM size (0x" RAM_ADDR_FMT ")",
410 numa_total, ram_size);
411 exit(1);
412 }
413
414
415
416
417
418
419
420
421
422
423
424
425
426 if (have_numa_distance) {
427
428 validate_numa_distance();
429
430
431 complete_init_numa_distance();
432 }
433 }
434}
435
436void numa_cpu_pre_plug(const CPUArchId *slot, DeviceState *dev, Error **errp)
437{
438 int node_id = object_property_get_int(OBJECT(dev), "node-id", &error_abort);
439
440 if (node_id == CPU_UNSET_NUMA_NODE_ID) {
441
442
443 if (slot->props.has_node_id) {
444 object_property_set_int(OBJECT(dev), slot->props.node_id,
445 "node-id", errp);
446 }
447 } else if (node_id != slot->props.node_id) {
448 error_setg(errp, "node-id=%d must match numa node specified "
449 "with -numa option", node_id);
450 }
451}
452
453static void allocate_system_memory_nonnuma(MemoryRegion *mr, Object *owner,
454 const char *name,
455 uint64_t ram_size)
456{
457 if (mem_path) {
458#ifdef __linux__
459 Error *err = NULL;
460 memory_region_init_ram_from_file(mr, owner, name, ram_size, 0, false,
461 mem_path, &err);
462 if (err) {
463 error_report_err(err);
464 if (mem_prealloc) {
465 exit(1);
466 }
467 error_report("falling back to regular RAM allocation.");
468
469
470
471
472 memory_region_init_ram_nomigrate(mr, owner, name, ram_size, &error_fatal);
473 }
474#else
475 fprintf(stderr, "-mem-path not supported on this host\n");
476 exit(1);
477#endif
478 } else {
479 memory_region_init_ram_nomigrate(mr, owner, name, ram_size, &error_fatal);
480 }
481 vmstate_register_ram_global(mr);
482}
483
484void memory_region_allocate_system_memory(MemoryRegion *mr, Object *owner,
485 const char *name,
486 uint64_t ram_size)
487{
488 uint64_t addr = 0;
489 int i;
490
491 if (nb_numa_nodes == 0 || !have_memdevs) {
492 allocate_system_memory_nonnuma(mr, owner, name, ram_size);
493 return;
494 }
495
496 memory_region_init(mr, owner, name, ram_size);
497 for (i = 0; i < nb_numa_nodes; i++) {
498 uint64_t size = numa_info[i].node_mem;
499 HostMemoryBackend *backend = numa_info[i].node_memdev;
500 if (!backend) {
501 continue;
502 }
503 MemoryRegion *seg = host_memory_backend_get_memory(backend,
504 &error_fatal);
505
506 if (memory_region_is_mapped(seg)) {
507 char *path = object_get_canonical_path_component(OBJECT(backend));
508 error_report("memory backend %s is used multiple times. Each "
509 "-numa option must use a different memdev value.",
510 path);
511 exit(1);
512 }
513
514 host_memory_backend_set_mapped(backend, true);
515 memory_region_add_subregion(mr, addr, seg);
516 vmstate_register_ram_global(seg);
517 addr += size;
518 }
519}
520
521static void numa_stat_memory_devices(NumaNodeMem node_mem[])
522{
523 MemoryDeviceInfoList *info_list = qmp_pc_dimm_device_list();
524 MemoryDeviceInfoList *info;
525 PCDIMMDeviceInfo *pcdimm_info;
526
527 for (info = info_list; info; info = info->next) {
528 MemoryDeviceInfo *value = info->value;
529
530 if (value) {
531 switch (value->type) {
532 case MEMORY_DEVICE_INFO_KIND_DIMM:
533 pcdimm_info = value->u.dimm.data;
534 break;
535
536 case MEMORY_DEVICE_INFO_KIND_NVDIMM:
537 pcdimm_info = value->u.nvdimm.data;
538 break;
539
540 default:
541 pcdimm_info = NULL;
542 break;
543 }
544
545 if (pcdimm_info) {
546 node_mem[pcdimm_info->node].node_mem += pcdimm_info->size;
547 if (pcdimm_info->hotpluggable && pcdimm_info->hotplugged) {
548 node_mem[pcdimm_info->node].node_plugged_mem +=
549 pcdimm_info->size;
550 }
551 }
552 }
553 }
554 qapi_free_MemoryDeviceInfoList(info_list);
555}
556
557void query_numa_node_mem(NumaNodeMem node_mem[])
558{
559 int i;
560
561 if (nb_numa_nodes <= 0) {
562 return;
563 }
564
565 numa_stat_memory_devices(node_mem);
566 for (i = 0; i < nb_numa_nodes; i++) {
567 node_mem[i].node_mem += numa_info[i].node_mem;
568 }
569}
570
571static int query_memdev(Object *obj, void *opaque)
572{
573 MemdevList **list = opaque;
574 MemdevList *m = NULL;
575
576 if (object_dynamic_cast(obj, TYPE_MEMORY_BACKEND)) {
577 m = g_malloc0(sizeof(*m));
578
579 m->value = g_malloc0(sizeof(*m->value));
580
581 m->value->id = object_property_get_str(obj, "id", NULL);
582 m->value->has_id = !!m->value->id;
583
584 m->value->size = object_property_get_uint(obj, "size",
585 &error_abort);
586 m->value->merge = object_property_get_bool(obj, "merge",
587 &error_abort);
588 m->value->dump = object_property_get_bool(obj, "dump",
589 &error_abort);
590 m->value->prealloc = object_property_get_bool(obj,
591 "prealloc",
592 &error_abort);
593 m->value->policy = object_property_get_enum(obj,
594 "policy",
595 "HostMemPolicy",
596 &error_abort);
597 object_property_get_uint16List(obj, "host-nodes",
598 &m->value->host_nodes,
599 &error_abort);
600
601 m->next = *list;
602 *list = m;
603 }
604
605 return 0;
606}
607
608MemdevList *qmp_query_memdev(Error **errp)
609{
610 Object *obj = object_get_objects_root();
611 MemdevList *list = NULL;
612
613 object_child_foreach(obj, query_memdev, &list);
614 return list;
615}
616
617void ram_block_notifier_add(RAMBlockNotifier *n)
618{
619 QLIST_INSERT_HEAD(&ram_list.ramblock_notifiers, n, next);
620}
621
622void ram_block_notifier_remove(RAMBlockNotifier *n)
623{
624 QLIST_REMOVE(n, next);
625}
626
627void ram_block_notify_add(void *host, size_t size)
628{
629 RAMBlockNotifier *notifier;
630
631 QLIST_FOREACH(notifier, &ram_list.ramblock_notifiers, next) {
632 notifier->ram_block_added(notifier, host, size);
633 }
634}
635
636void ram_block_notify_remove(void *host, size_t size)
637{
638 RAMBlockNotifier *notifier;
639
640 QLIST_FOREACH(notifier, &ram_list.ramblock_notifiers, next) {
641 notifier->ram_block_removed(notifier, host, size);
642 }
643}
644