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