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