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Commit | Line | Data |
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10b7e74b VL |
1 | /* |
2 | * Dimm device for Memory Hotplug | |
3 | * | |
4 | * Copyright ProfitBricks GmbH 2012 | |
5 | * Copyright (C) 2014 Red Hat Inc | |
6 | * | |
7 | * This library is free software; you can redistribute it and/or | |
8 | * modify it under the terms of the GNU Lesser General Public | |
9 | * License as published by the Free Software Foundation; either | |
10 | * version 2 of the License, or (at your option) any later version. | |
11 | * | |
12 | * This library is distributed in the hope that it will be useful, | |
13 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
14 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
15 | * Lesser General Public License for more details. | |
16 | * | |
17 | * You should have received a copy of the GNU Lesser General Public | |
18 | * License along with this library; if not, see <http://www.gnu.org/licenses/> | |
19 | */ | |
20 | ||
0430891c | 21 | #include "qemu/osdep.h" |
10b7e74b | 22 | #include "hw/mem/pc-dimm.h" |
da34e65c | 23 | #include "qapi/error.h" |
10b7e74b VL |
24 | #include "qemu/config-file.h" |
25 | #include "qapi/visitor.h" | |
0b312571 | 26 | #include "qemu/range.h" |
e35704ba | 27 | #include "sysemu/numa.h" |
43bbb49e BR |
28 | #include "sysemu/kvm.h" |
29 | #include "trace.h" | |
3fad8788 | 30 | #include "hw/virtio/vhost.h" |
9967c949 | 31 | |
37153450 BR |
32 | typedef struct pc_dimms_capacity { |
33 | uint64_t size; | |
34 | Error **errp; | |
35 | } pc_dimms_capacity; | |
36 | ||
43bbb49e | 37 | void pc_dimm_memory_plug(DeviceState *dev, MemoryHotplugState *hpms, |
d6a9b0b8 | 38 | MemoryRegion *mr, uint64_t align, Error **errp) |
43bbb49e BR |
39 | { |
40 | int slot; | |
41 | MachineState *machine = MACHINE(qdev_get_machine()); | |
42 | PCDIMMDevice *dimm = PC_DIMM(dev); | |
8df1426e XG |
43 | PCDIMMDeviceClass *ddc = PC_DIMM_GET_CLASS(dimm); |
44 | MemoryRegion *vmstate_mr = ddc->get_vmstate_memory_region(dimm); | |
43bbb49e BR |
45 | Error *local_err = NULL; |
46 | uint64_t existing_dimms_capacity = 0; | |
47 | uint64_t addr; | |
48 | ||
49 | addr = object_property_get_int(OBJECT(dimm), PC_DIMM_ADDR_PROP, &local_err); | |
50 | if (local_err) { | |
51 | goto out; | |
52 | } | |
53 | ||
54 | addr = pc_dimm_get_free_addr(hpms->base, | |
55 | memory_region_size(&hpms->mr), | |
d6a9b0b8 | 56 | !addr ? NULL : &addr, align, |
43bbb49e BR |
57 | memory_region_size(mr), &local_err); |
58 | if (local_err) { | |
59 | goto out; | |
60 | } | |
61 | ||
62 | existing_dimms_capacity = pc_existing_dimms_capacity(&local_err); | |
63 | if (local_err) { | |
64 | goto out; | |
65 | } | |
66 | ||
67 | if (existing_dimms_capacity + memory_region_size(mr) > | |
68 | machine->maxram_size - machine->ram_size) { | |
69 | error_setg(&local_err, "not enough space, currently 0x%" PRIx64 | |
70 | " in use of total hot pluggable 0x" RAM_ADDR_FMT, | |
71 | existing_dimms_capacity, | |
72 | machine->maxram_size - machine->ram_size); | |
73 | goto out; | |
74 | } | |
75 | ||
76 | object_property_set_int(OBJECT(dev), addr, PC_DIMM_ADDR_PROP, &local_err); | |
77 | if (local_err) { | |
78 | goto out; | |
79 | } | |
80 | trace_mhp_pc_dimm_assigned_address(addr); | |
81 | ||
82 | slot = object_property_get_int(OBJECT(dev), PC_DIMM_SLOT_PROP, &local_err); | |
83 | if (local_err) { | |
84 | goto out; | |
85 | } | |
86 | ||
87 | slot = pc_dimm_get_free_slot(slot == PC_DIMM_UNASSIGNED_SLOT ? NULL : &slot, | |
88 | machine->ram_slots, &local_err); | |
89 | if (local_err) { | |
90 | goto out; | |
91 | } | |
92 | object_property_set_int(OBJECT(dev), slot, PC_DIMM_SLOT_PROP, &local_err); | |
93 | if (local_err) { | |
94 | goto out; | |
95 | } | |
96 | trace_mhp_pc_dimm_assigned_slot(slot); | |
97 | ||
98 | if (kvm_enabled() && !kvm_has_free_slot(machine)) { | |
99 | error_setg(&local_err, "hypervisor has no free memory slots left"); | |
100 | goto out; | |
101 | } | |
102 | ||
3fad8788 IM |
103 | if (!vhost_has_free_slot()) { |
104 | error_setg(&local_err, "a used vhost backend has no free" | |
105 | " memory slots left"); | |
106 | goto out; | |
107 | } | |
108 | ||
43bbb49e | 109 | memory_region_add_subregion(&hpms->mr, addr - hpms->base, mr); |
8df1426e | 110 | vmstate_register_ram(vmstate_mr, dev); |
fa9ea81d | 111 | numa_set_mem_node_id(addr, memory_region_size(mr), dimm->node); |
43bbb49e BR |
112 | |
113 | out: | |
114 | error_propagate(errp, local_err); | |
115 | } | |
116 | ||
117 | void pc_dimm_memory_unplug(DeviceState *dev, MemoryHotplugState *hpms, | |
118 | MemoryRegion *mr) | |
119 | { | |
fa9ea81d | 120 | PCDIMMDevice *dimm = PC_DIMM(dev); |
8df1426e XG |
121 | PCDIMMDeviceClass *ddc = PC_DIMM_GET_CLASS(dimm); |
122 | MemoryRegion *vmstate_mr = ddc->get_vmstate_memory_region(dimm); | |
fa9ea81d BR |
123 | |
124 | numa_unset_mem_node_id(dimm->addr, memory_region_size(mr), dimm->node); | |
43bbb49e | 125 | memory_region_del_subregion(&hpms->mr, mr); |
8df1426e | 126 | vmstate_unregister_ram(vmstate_mr, dev); |
43bbb49e BR |
127 | } |
128 | ||
37153450 | 129 | static int pc_existing_dimms_capacity_internal(Object *obj, void *opaque) |
9967c949 | 130 | { |
37153450 BR |
131 | pc_dimms_capacity *cap = opaque; |
132 | uint64_t *size = &cap->size; | |
9967c949 BR |
133 | |
134 | if (object_dynamic_cast(obj, TYPE_PC_DIMM)) { | |
135 | DeviceState *dev = DEVICE(obj); | |
136 | ||
137 | if (dev->realized) { | |
138 | (*size) += object_property_get_int(obj, PC_DIMM_SIZE_PROP, | |
37153450 | 139 | cap->errp); |
9967c949 BR |
140 | } |
141 | ||
37153450 | 142 | if (cap->errp && *cap->errp) { |
9967c949 BR |
143 | return 1; |
144 | } | |
145 | } | |
37153450 | 146 | object_child_foreach(obj, pc_existing_dimms_capacity_internal, opaque); |
9967c949 BR |
147 | return 0; |
148 | } | |
0b312571 | 149 | |
37153450 BR |
150 | uint64_t pc_existing_dimms_capacity(Error **errp) |
151 | { | |
152 | pc_dimms_capacity cap; | |
153 | ||
154 | cap.size = 0; | |
155 | cap.errp = errp; | |
156 | ||
157 | pc_existing_dimms_capacity_internal(qdev_get_machine(), &cap); | |
158 | return cap.size; | |
159 | } | |
160 | ||
6f2e2730 IM |
161 | int qmp_pc_dimm_device_list(Object *obj, void *opaque) |
162 | { | |
163 | MemoryDeviceInfoList ***prev = opaque; | |
164 | ||
165 | if (object_dynamic_cast(obj, TYPE_PC_DIMM)) { | |
166 | DeviceState *dev = DEVICE(obj); | |
167 | ||
168 | if (dev->realized) { | |
169 | MemoryDeviceInfoList *elem = g_new0(MemoryDeviceInfoList, 1); | |
170 | MemoryDeviceInfo *info = g_new0(MemoryDeviceInfo, 1); | |
171 | PCDIMMDeviceInfo *di = g_new0(PCDIMMDeviceInfo, 1); | |
172 | DeviceClass *dc = DEVICE_GET_CLASS(obj); | |
173 | PCDIMMDevice *dimm = PC_DIMM(obj); | |
174 | ||
175 | if (dev->id) { | |
176 | di->has_id = true; | |
177 | di->id = g_strdup(dev->id); | |
178 | } | |
179 | di->hotplugged = dev->hotplugged; | |
180 | di->hotpluggable = dc->hotpluggable; | |
181 | di->addr = dimm->addr; | |
182 | di->slot = dimm->slot; | |
183 | di->node = dimm->node; | |
184 | di->size = object_property_get_int(OBJECT(dimm), PC_DIMM_SIZE_PROP, | |
185 | NULL); | |
186 | di->memdev = object_get_canonical_path(OBJECT(dimm->hostmem)); | |
187 | ||
32bafa8f | 188 | info->u.dimm.data = di; |
6f2e2730 IM |
189 | elem->value = info; |
190 | elem->next = NULL; | |
191 | **prev = elem; | |
192 | *prev = &elem->next; | |
193 | } | |
194 | } | |
195 | ||
196 | object_child_foreach(obj, qmp_pc_dimm_device_list, opaque); | |
197 | return 0; | |
198 | } | |
199 | ||
0cd03d89 IM |
200 | static int pc_dimm_slot2bitmap(Object *obj, void *opaque) |
201 | { | |
202 | unsigned long *bitmap = opaque; | |
203 | ||
204 | if (object_dynamic_cast(obj, TYPE_PC_DIMM)) { | |
205 | DeviceState *dev = DEVICE(obj); | |
206 | if (dev->realized) { /* count only realized DIMMs */ | |
207 | PCDIMMDevice *d = PC_DIMM(obj); | |
208 | set_bit(d->slot, bitmap); | |
209 | } | |
210 | } | |
211 | ||
212 | object_child_foreach(obj, pc_dimm_slot2bitmap, opaque); | |
213 | return 0; | |
214 | } | |
215 | ||
216 | int pc_dimm_get_free_slot(const int *hint, int max_slots, Error **errp) | |
217 | { | |
218 | unsigned long *bitmap = bitmap_new(max_slots); | |
219 | int slot = 0; | |
220 | ||
221 | object_child_foreach(qdev_get_machine(), pc_dimm_slot2bitmap, bitmap); | |
222 | ||
223 | /* check if requested slot is not occupied */ | |
224 | if (hint) { | |
225 | if (*hint >= max_slots) { | |
226 | error_setg(errp, "invalid slot# %d, should be less than %d", | |
227 | *hint, max_slots); | |
228 | } else if (!test_bit(*hint, bitmap)) { | |
229 | slot = *hint; | |
230 | } else { | |
231 | error_setg(errp, "slot %d is busy", *hint); | |
232 | } | |
233 | goto out; | |
234 | } | |
235 | ||
236 | /* search for free slot */ | |
237 | slot = find_first_zero_bit(bitmap, max_slots); | |
238 | if (slot == max_slots) { | |
239 | error_setg(errp, "no free slots available"); | |
240 | } | |
241 | out: | |
242 | g_free(bitmap); | |
243 | return slot; | |
244 | } | |
245 | ||
0b312571 IM |
246 | static gint pc_dimm_addr_sort(gconstpointer a, gconstpointer b) |
247 | { | |
248 | PCDIMMDevice *x = PC_DIMM(a); | |
249 | PCDIMMDevice *y = PC_DIMM(b); | |
250 | Int128 diff = int128_sub(int128_make64(x->addr), int128_make64(y->addr)); | |
251 | ||
252 | if (int128_lt(diff, int128_zero())) { | |
253 | return -1; | |
254 | } else if (int128_gt(diff, int128_zero())) { | |
255 | return 1; | |
256 | } | |
257 | return 0; | |
258 | } | |
259 | ||
260 | static int pc_dimm_built_list(Object *obj, void *opaque) | |
261 | { | |
262 | GSList **list = opaque; | |
263 | ||
264 | if (object_dynamic_cast(obj, TYPE_PC_DIMM)) { | |
265 | DeviceState *dev = DEVICE(obj); | |
266 | if (dev->realized) { /* only realized DIMMs matter */ | |
267 | *list = g_slist_insert_sorted(*list, dev, pc_dimm_addr_sort); | |
268 | } | |
269 | } | |
270 | ||
271 | object_child_foreach(obj, pc_dimm_built_list, opaque); | |
272 | return 0; | |
273 | } | |
274 | ||
275 | uint64_t pc_dimm_get_free_addr(uint64_t address_space_start, | |
276 | uint64_t address_space_size, | |
d6a9b0b8 MT |
277 | uint64_t *hint, uint64_t align, uint64_t size, |
278 | Error **errp) | |
0b312571 IM |
279 | { |
280 | GSList *list = NULL, *item; | |
281 | uint64_t new_addr, ret = 0; | |
282 | uint64_t address_space_end = address_space_start + address_space_size; | |
283 | ||
0c0de1b6 | 284 | g_assert(QEMU_ALIGN_UP(address_space_start, align) == address_space_start); |
0c0de1b6 | 285 | |
9b79a76c IM |
286 | if (!address_space_size) { |
287 | error_setg(errp, "memory hotplug is not enabled, " | |
288 | "please add maxmem option"); | |
289 | goto out; | |
290 | } | |
291 | ||
92a37a04 IM |
292 | if (hint && QEMU_ALIGN_UP(*hint, align) != *hint) { |
293 | error_setg(errp, "address must be aligned to 0x%" PRIx64 " bytes", | |
294 | align); | |
295 | goto out; | |
296 | } | |
297 | ||
298 | if (QEMU_ALIGN_UP(size, align) != size) { | |
299 | error_setg(errp, "backend memory size must be multiple of 0x%" | |
300 | PRIx64, align); | |
301 | goto out; | |
302 | } | |
303 | ||
9b79a76c | 304 | assert(address_space_end > address_space_start); |
0b312571 IM |
305 | object_child_foreach(qdev_get_machine(), pc_dimm_built_list, &list); |
306 | ||
307 | if (hint) { | |
308 | new_addr = *hint; | |
309 | } else { | |
310 | new_addr = address_space_start; | |
311 | } | |
312 | ||
313 | /* find address range that will fit new DIMM */ | |
314 | for (item = list; item; item = g_slist_next(item)) { | |
315 | PCDIMMDevice *dimm = item->data; | |
316 | uint64_t dimm_size = object_property_get_int(OBJECT(dimm), | |
317 | PC_DIMM_SIZE_PROP, | |
318 | errp); | |
319 | if (errp && *errp) { | |
320 | goto out; | |
321 | } | |
322 | ||
d6a9b0b8 | 323 | if (ranges_overlap(dimm->addr, dimm_size, new_addr, size)) { |
0b312571 IM |
324 | if (hint) { |
325 | DeviceState *d = DEVICE(dimm); | |
326 | error_setg(errp, "address range conflicts with '%s'", d->id); | |
327 | goto out; | |
328 | } | |
d6a9b0b8 | 329 | new_addr = QEMU_ALIGN_UP(dimm->addr + dimm_size, align); |
0b312571 IM |
330 | } |
331 | } | |
332 | ret = new_addr; | |
333 | ||
334 | if (new_addr < address_space_start) { | |
335 | error_setg(errp, "can't add memory [0x%" PRIx64 ":0x%" PRIx64 | |
336 | "] at 0x%" PRIx64, new_addr, size, address_space_start); | |
337 | } else if ((new_addr + size) > address_space_end) { | |
338 | error_setg(errp, "can't add memory [0x%" PRIx64 ":0x%" PRIx64 | |
339 | "] beyond 0x%" PRIx64, new_addr, size, address_space_end); | |
340 | } | |
341 | ||
342 | out: | |
343 | g_slist_free(list); | |
344 | return ret; | |
345 | } | |
10b7e74b VL |
346 | |
347 | static Property pc_dimm_properties[] = { | |
348 | DEFINE_PROP_UINT64(PC_DIMM_ADDR_PROP, PCDIMMDevice, addr, 0), | |
349 | DEFINE_PROP_UINT32(PC_DIMM_NODE_PROP, PCDIMMDevice, node, 0), | |
350 | DEFINE_PROP_INT32(PC_DIMM_SLOT_PROP, PCDIMMDevice, slot, | |
351 | PC_DIMM_UNASSIGNED_SLOT), | |
352 | DEFINE_PROP_END_OF_LIST(), | |
353 | }; | |
354 | ||
d7bce999 EB |
355 | static void pc_dimm_get_size(Object *obj, Visitor *v, const char *name, |
356 | void *opaque, Error **errp) | |
10b7e74b VL |
357 | { |
358 | int64_t value; | |
359 | MemoryRegion *mr; | |
360 | PCDIMMDevice *dimm = PC_DIMM(obj); | |
3c3e88a8 | 361 | PCDIMMDeviceClass *ddc = PC_DIMM_GET_CLASS(obj); |
10b7e74b | 362 | |
3c3e88a8 | 363 | mr = ddc->get_memory_region(dimm); |
10b7e74b VL |
364 | value = memory_region_size(mr); |
365 | ||
51e72bc1 | 366 | visit_type_int(v, name, &value, errp); |
10b7e74b VL |
367 | } |
368 | ||
7bb5d6ad IM |
369 | static void pc_dimm_check_memdev_is_busy(Object *obj, const char *name, |
370 | Object *val, Error **errp) | |
371 | { | |
c9f4b77a | 372 | Error *local_err = NULL; |
7bb5d6ad | 373 | |
2aece63c | 374 | if (host_memory_backend_is_mapped(MEMORY_BACKEND(val))) { |
7bb5d6ad | 375 | char *path = object_get_canonical_path_component(val); |
c9f4b77a | 376 | error_setg(&local_err, "can't use already busy memdev: %s", path); |
7bb5d6ad IM |
377 | g_free(path); |
378 | } else { | |
c9f4b77a | 379 | qdev_prop_allow_set_link_before_realize(obj, name, val, &local_err); |
7bb5d6ad | 380 | } |
c9f4b77a | 381 | |
c9f4b77a | 382 | error_propagate(errp, local_err); |
7bb5d6ad IM |
383 | } |
384 | ||
10b7e74b VL |
385 | static void pc_dimm_init(Object *obj) |
386 | { | |
387 | PCDIMMDevice *dimm = PC_DIMM(obj); | |
388 | ||
389 | object_property_add(obj, PC_DIMM_SIZE_PROP, "int", pc_dimm_get_size, | |
390 | NULL, NULL, NULL, &error_abort); | |
391 | object_property_add_link(obj, PC_DIMM_MEMDEV_PROP, TYPE_MEMORY_BACKEND, | |
392 | (Object **)&dimm->hostmem, | |
7bb5d6ad | 393 | pc_dimm_check_memdev_is_busy, |
10b7e74b VL |
394 | OBJ_PROP_LINK_UNREF_ON_RELEASE, |
395 | &error_abort); | |
396 | } | |
397 | ||
398 | static void pc_dimm_realize(DeviceState *dev, Error **errp) | |
399 | { | |
400 | PCDIMMDevice *dimm = PC_DIMM(dev); | |
9f318f8f | 401 | PCDIMMDeviceClass *ddc = PC_DIMM_GET_CLASS(dimm); |
10b7e74b VL |
402 | |
403 | if (!dimm->hostmem) { | |
404 | error_setg(errp, "'" PC_DIMM_MEMDEV_PROP "' property is not set"); | |
405 | return; | |
406 | } | |
32532f21 BR |
407 | if (((nb_numa_nodes > 0) && (dimm->node >= nb_numa_nodes)) || |
408 | (!nb_numa_nodes && dimm->node)) { | |
988eba0f MT |
409 | error_setg(errp, "'DIMM property " PC_DIMM_NODE_PROP " has value %" |
410 | PRIu32 "' which exceeds the number of numa nodes: %d", | |
32532f21 | 411 | dimm->node, nb_numa_nodes ? nb_numa_nodes : 1); |
cfe0ffd0 HT |
412 | return; |
413 | } | |
9f318f8f XG |
414 | |
415 | if (ddc->realize) { | |
416 | ddc->realize(dimm, errp); | |
417 | } | |
2aece63c XG |
418 | |
419 | host_memory_backend_set_mapped(dimm->hostmem, true); | |
420 | } | |
421 | ||
422 | static void pc_dimm_unrealize(DeviceState *dev, Error **errp) | |
423 | { | |
424 | PCDIMMDevice *dimm = PC_DIMM(dev); | |
425 | ||
426 | host_memory_backend_set_mapped(dimm->hostmem, false); | |
10b7e74b VL |
427 | } |
428 | ||
429 | static MemoryRegion *pc_dimm_get_memory_region(PCDIMMDevice *dimm) | |
430 | { | |
431 | return host_memory_backend_get_memory(dimm->hostmem, &error_abort); | |
432 | } | |
433 | ||
8df1426e XG |
434 | static MemoryRegion *pc_dimm_get_vmstate_memory_region(PCDIMMDevice *dimm) |
435 | { | |
436 | return host_memory_backend_get_memory(dimm->hostmem, &error_abort); | |
437 | } | |
438 | ||
10b7e74b VL |
439 | static void pc_dimm_class_init(ObjectClass *oc, void *data) |
440 | { | |
441 | DeviceClass *dc = DEVICE_CLASS(oc); | |
442 | PCDIMMDeviceClass *ddc = PC_DIMM_CLASS(oc); | |
443 | ||
444 | dc->realize = pc_dimm_realize; | |
2aece63c | 445 | dc->unrealize = pc_dimm_unrealize; |
10b7e74b | 446 | dc->props = pc_dimm_properties; |
bdd09778 | 447 | dc->desc = "DIMM memory module"; |
10b7e74b VL |
448 | |
449 | ddc->get_memory_region = pc_dimm_get_memory_region; | |
8df1426e | 450 | ddc->get_vmstate_memory_region = pc_dimm_get_vmstate_memory_region; |
10b7e74b VL |
451 | } |
452 | ||
453 | static TypeInfo pc_dimm_info = { | |
454 | .name = TYPE_PC_DIMM, | |
455 | .parent = TYPE_DEVICE, | |
456 | .instance_size = sizeof(PCDIMMDevice), | |
457 | .instance_init = pc_dimm_init, | |
458 | .class_init = pc_dimm_class_init, | |
459 | .class_size = sizeof(PCDIMMDeviceClass), | |
460 | }; | |
461 | ||
462 | static void pc_dimm_register_types(void) | |
463 | { | |
464 | type_register_static(&pc_dimm_info); | |
465 | } | |
466 | ||
467 | type_init(pc_dimm_register_types) |