2 * pseries Memory Hotplug infrastructure.
4 * Copyright (C) 2008 Badari Pulavarty, IBM Corporation
6 * This program is free software; you can redistribute it and/or
7 * modify it under the terms of the GNU General Public License
8 * as published by the Free Software Foundation; either version
9 * 2 of the License, or (at your option) any later version.
12 #define pr_fmt(fmt) "pseries-hotplug-mem: " fmt
15 #include <linux/of_address.h>
16 #include <linux/memblock.h>
17 #include <linux/memory.h>
18 #include <linux/memory_hotplug.h>
19 #include <linux/slab.h>
21 #include <asm/firmware.h>
22 #include <asm/machdep.h>
24 #include <asm/sparsemem.h>
25 #include <asm/fadump.h>
26 #include <asm/drmem.h>
29 static bool rtas_hp_event;
31 unsigned long pseries_memory_block_size(void)
33 struct device_node *np;
34 unsigned int memblock_size = MIN_MEMORY_BLOCK_SIZE;
37 np = of_find_node_by_path("/ibm,dynamic-reconfiguration-memory");
41 size = of_get_property(np, "ibm,lmb-size", NULL);
43 memblock_size = be64_to_cpup(size);
45 } else if (machine_is(pseries)) {
46 /* This fallback really only applies to pseries */
47 unsigned int memzero_size = 0;
49 np = of_find_node_by_path("/memory@0");
51 if (!of_address_to_resource(np, 0, &r))
52 memzero_size = resource_size(&r);
57 /* We now know the size of memory@0, use this to find
58 * the first memoryblock and get its size.
62 sprintf(buf, "/memory@%x", memzero_size);
63 np = of_find_node_by_path(buf);
65 if (!of_address_to_resource(np, 0, &r))
66 memblock_size = resource_size(&r);
74 static void dlpar_free_property(struct property *prop)
81 static struct property *dlpar_clone_property(struct property *prop,
84 struct property *new_prop;
86 new_prop = kzalloc(sizeof(*new_prop), GFP_KERNEL);
90 new_prop->name = kstrdup(prop->name, GFP_KERNEL);
91 new_prop->value = kzalloc(prop_size, GFP_KERNEL);
92 if (!new_prop->name || !new_prop->value) {
93 dlpar_free_property(new_prop);
97 memcpy(new_prop->value, prop->value, prop->length);
98 new_prop->length = prop_size;
100 of_property_set_flag(new_prop, OF_DYNAMIC);
104 static bool find_aa_index(struct device_node *dr_node,
105 struct property *ala_prop,
106 const u32 *lmb_assoc, u32 *aa_index)
108 u32 *assoc_arrays, new_prop_size;
109 struct property *new_prop;
110 int aa_arrays, aa_array_entries, aa_array_sz;
114 * The ibm,associativity-lookup-arrays property is defined to be
115 * a 32-bit value specifying the number of associativity arrays
116 * followed by a 32-bitvalue specifying the number of entries per
117 * array, followed by the associativity arrays.
119 assoc_arrays = ala_prop->value;
121 aa_arrays = be32_to_cpu(assoc_arrays[0]);
122 aa_array_entries = be32_to_cpu(assoc_arrays[1]);
123 aa_array_sz = aa_array_entries * sizeof(u32);
125 for (i = 0; i < aa_arrays; i++) {
126 index = (i * aa_array_entries) + 2;
128 if (memcmp(&assoc_arrays[index], &lmb_assoc[1], aa_array_sz))
135 new_prop_size = ala_prop->length + aa_array_sz;
136 new_prop = dlpar_clone_property(ala_prop, new_prop_size);
140 assoc_arrays = new_prop->value;
142 /* increment the number of entries in the lookup array */
143 assoc_arrays[0] = cpu_to_be32(aa_arrays + 1);
145 /* copy the new associativity into the lookup array */
146 index = aa_arrays * aa_array_entries + 2;
147 memcpy(&assoc_arrays[index], &lmb_assoc[1], aa_array_sz);
149 of_update_property(dr_node, new_prop);
152 * The associativity lookup array index for this lmb is
153 * number of entries - 1 since we added its associativity
154 * to the end of the lookup array.
156 *aa_index = be32_to_cpu(assoc_arrays[0]) - 1;
160 static int update_lmb_associativity_index(struct drmem_lmb *lmb)
162 struct device_node *parent, *lmb_node, *dr_node;
163 struct property *ala_prop;
164 const u32 *lmb_assoc;
168 parent = of_find_node_by_path("/");
172 lmb_node = dlpar_configure_connector(cpu_to_be32(lmb->drc_index),
178 lmb_assoc = of_get_property(lmb_node, "ibm,associativity", NULL);
180 dlpar_free_cc_nodes(lmb_node);
184 dr_node = of_find_node_by_path("/ibm,dynamic-reconfiguration-memory");
186 dlpar_free_cc_nodes(lmb_node);
190 ala_prop = of_find_property(dr_node, "ibm,associativity-lookup-arrays",
193 of_node_put(dr_node);
194 dlpar_free_cc_nodes(lmb_node);
198 found = find_aa_index(dr_node, ala_prop, lmb_assoc, &aa_index);
200 dlpar_free_cc_nodes(lmb_node);
203 pr_err("Could not find LMB associativity\n");
207 lmb->aa_index = aa_index;
211 static struct memory_block *lmb_to_memblock(struct drmem_lmb *lmb)
213 unsigned long section_nr;
214 struct mem_section *mem_sect;
215 struct memory_block *mem_block;
217 section_nr = pfn_to_section_nr(PFN_DOWN(lmb->base_addr));
218 mem_sect = __nr_to_section(section_nr);
220 mem_block = find_memory_block(mem_sect);
224 static int get_lmb_range(u32 drc_index, int n_lmbs,
225 struct drmem_lmb **start_lmb,
226 struct drmem_lmb **end_lmb)
228 struct drmem_lmb *lmb, *start, *end;
229 struct drmem_lmb *last_lmb;
232 for_each_drmem_lmb(lmb) {
233 if (lmb->drc_index == drc_index) {
242 end = &start[n_lmbs - 1];
244 last_lmb = &drmem_info->lmbs[drmem_info->n_lmbs - 1];
253 static int dlpar_change_lmb_state(struct drmem_lmb *lmb, bool online)
255 struct memory_block *mem_block;
258 mem_block = lmb_to_memblock(lmb);
262 if (online && mem_block->dev.offline)
263 rc = device_online(&mem_block->dev);
264 else if (!online && !mem_block->dev.offline)
265 rc = device_offline(&mem_block->dev);
269 put_device(&mem_block->dev);
274 static int dlpar_online_lmb(struct drmem_lmb *lmb)
276 return dlpar_change_lmb_state(lmb, true);
279 #ifdef CONFIG_MEMORY_HOTREMOVE
280 static int dlpar_offline_lmb(struct drmem_lmb *lmb)
282 return dlpar_change_lmb_state(lmb, false);
285 static int pseries_remove_memblock(unsigned long base, unsigned int memblock_size)
287 unsigned long block_sz, start_pfn;
288 int sections_per_block;
291 start_pfn = base >> PAGE_SHIFT;
293 lock_device_hotplug();
295 if (!pfn_valid(start_pfn))
298 block_sz = pseries_memory_block_size();
299 sections_per_block = block_sz / MIN_MEMORY_BLOCK_SIZE;
300 nid = memory_add_physaddr_to_nid(base);
302 for (i = 0; i < sections_per_block; i++) {
303 __remove_memory(nid, base, MIN_MEMORY_BLOCK_SIZE);
304 base += MIN_MEMORY_BLOCK_SIZE;
308 /* Update memory regions for memory remove */
309 memblock_remove(base, memblock_size);
310 unlock_device_hotplug();
314 static int pseries_remove_mem_node(struct device_node *np)
319 unsigned int lmb_size;
323 * Check to see if we are actually removing memory
325 type = of_get_property(np, "device_type", NULL);
326 if (type == NULL || strcmp(type, "memory") != 0)
330 * Find the base address and size of the memblock
332 regs = of_get_property(np, "reg", NULL);
336 base = be64_to_cpu(*(unsigned long *)regs);
337 lmb_size = be32_to_cpu(regs[3]);
339 pseries_remove_memblock(base, lmb_size);
343 static bool lmb_is_removable(struct drmem_lmb *lmb)
345 int i, scns_per_block;
347 unsigned long pfn, block_sz;
350 if (!(lmb->flags & DRCONF_MEM_ASSIGNED))
353 block_sz = memory_block_size_bytes();
354 scns_per_block = block_sz / MIN_MEMORY_BLOCK_SIZE;
355 phys_addr = lmb->base_addr;
357 #ifdef CONFIG_FA_DUMP
358 /* Don't hot-remove memory that falls in fadump boot memory area */
359 if (is_fadump_boot_memory_area(phys_addr, block_sz))
363 for (i = 0; i < scns_per_block; i++) {
364 pfn = PFN_DOWN(phys_addr);
365 if (!pfn_present(pfn))
368 rc &= is_mem_section_removable(pfn, PAGES_PER_SECTION);
369 phys_addr += MIN_MEMORY_BLOCK_SIZE;
372 return rc ? true : false;
375 static int dlpar_add_lmb(struct drmem_lmb *);
377 static int dlpar_remove_lmb(struct drmem_lmb *lmb)
379 unsigned long block_sz;
382 if (!lmb_is_removable(lmb))
385 rc = dlpar_offline_lmb(lmb);
389 block_sz = pseries_memory_block_size();
390 nid = memory_add_physaddr_to_nid(lmb->base_addr);
392 __remove_memory(nid, lmb->base_addr, block_sz);
394 /* Update memory regions for memory remove */
395 memblock_remove(lmb->base_addr, block_sz);
397 invalidate_lmb_associativity_index(lmb);
398 lmb->flags &= ~DRCONF_MEM_ASSIGNED;
403 static int dlpar_memory_remove_by_count(u32 lmbs_to_remove)
405 struct drmem_lmb *lmb;
406 int lmbs_removed = 0;
407 int lmbs_available = 0;
410 pr_info("Attempting to hot-remove %d LMB(s)\n", lmbs_to_remove);
412 if (lmbs_to_remove == 0)
415 /* Validate that there are enough LMBs to satisfy the request */
416 for_each_drmem_lmb(lmb) {
417 if (lmb_is_removable(lmb))
420 if (lmbs_available == lmbs_to_remove)
424 if (lmbs_available < lmbs_to_remove) {
425 pr_info("Not enough LMBs available (%d of %d) to satisfy request\n",
426 lmbs_available, lmbs_to_remove);
430 for_each_drmem_lmb(lmb) {
431 rc = dlpar_remove_lmb(lmb);
435 /* Mark this lmb so we can add it later if all of the
436 * requested LMBs cannot be removed.
438 drmem_mark_lmb_reserved(lmb);
441 if (lmbs_removed == lmbs_to_remove)
445 if (lmbs_removed != lmbs_to_remove) {
446 pr_err("Memory hot-remove failed, adding LMB's back\n");
448 for_each_drmem_lmb(lmb) {
449 if (!drmem_lmb_reserved(lmb))
452 rc = dlpar_add_lmb(lmb);
454 pr_err("Failed to add LMB back, drc index %x\n",
457 drmem_remove_lmb_reservation(lmb);
462 for_each_drmem_lmb(lmb) {
463 if (!drmem_lmb_reserved(lmb))
466 dlpar_release_drc(lmb->drc_index);
467 pr_info("Memory at %llx was hot-removed\n",
470 drmem_remove_lmb_reservation(lmb);
478 static int dlpar_memory_remove_by_index(u32 drc_index)
480 struct drmem_lmb *lmb;
484 pr_info("Attempting to hot-remove LMB, drc index %x\n", drc_index);
487 for_each_drmem_lmb(lmb) {
488 if (lmb->drc_index == drc_index) {
490 rc = dlpar_remove_lmb(lmb);
492 dlpar_release_drc(lmb->drc_index);
502 pr_info("Failed to hot-remove memory at %llx\n",
505 pr_info("Memory at %llx was hot-removed\n", lmb->base_addr);
510 static int dlpar_memory_readd_by_index(u32 drc_index)
512 struct drmem_lmb *lmb;
516 pr_info("Attempting to update LMB, drc index %x\n", drc_index);
519 for_each_drmem_lmb(lmb) {
520 if (lmb->drc_index == drc_index) {
522 rc = dlpar_remove_lmb(lmb);
524 rc = dlpar_add_lmb(lmb);
526 dlpar_release_drc(lmb->drc_index);
536 pr_info("Failed to update memory at %llx\n",
539 pr_info("Memory at %llx was updated\n", lmb->base_addr);
544 static int dlpar_memory_remove_by_ic(u32 lmbs_to_remove, u32 drc_index)
546 struct drmem_lmb *lmb, *start_lmb, *end_lmb;
547 int lmbs_available = 0;
550 pr_info("Attempting to hot-remove %u LMB(s) at %x\n",
551 lmbs_to_remove, drc_index);
553 if (lmbs_to_remove == 0)
556 rc = get_lmb_range(drc_index, lmbs_to_remove, &start_lmb, &end_lmb);
560 /* Validate that there are enough LMBs to satisfy the request */
561 for_each_drmem_lmb_in_range(lmb, start_lmb, end_lmb) {
562 if (lmb->flags & DRCONF_MEM_RESERVED)
568 if (lmbs_available < lmbs_to_remove)
571 for_each_drmem_lmb_in_range(lmb, start_lmb, end_lmb) {
572 if (!(lmb->flags & DRCONF_MEM_ASSIGNED))
575 rc = dlpar_remove_lmb(lmb);
579 drmem_mark_lmb_reserved(lmb);
583 pr_err("Memory indexed-count-remove failed, adding any removed LMBs\n");
586 for_each_drmem_lmb_in_range(lmb, start_lmb, end_lmb) {
587 if (!drmem_lmb_reserved(lmb))
590 rc = dlpar_add_lmb(lmb);
592 pr_err("Failed to add LMB, drc index %x\n",
595 drmem_remove_lmb_reservation(lmb);
599 for_each_drmem_lmb_in_range(lmb, start_lmb, end_lmb) {
600 if (!drmem_lmb_reserved(lmb))
603 dlpar_release_drc(lmb->drc_index);
604 pr_info("Memory at %llx (drc index %x) was hot-removed\n",
605 lmb->base_addr, lmb->drc_index);
607 drmem_remove_lmb_reservation(lmb);
615 static inline int pseries_remove_memblock(unsigned long base,
616 unsigned int memblock_size)
620 static inline int pseries_remove_mem_node(struct device_node *np)
624 static inline int dlpar_memory_remove(struct pseries_hp_errorlog *hp_elog)
628 static int dlpar_remove_lmb(struct drmem_lmb *lmb)
632 static int dlpar_memory_remove_by_count(u32 lmbs_to_remove)
636 static int dlpar_memory_remove_by_index(u32 drc_index)
640 static int dlpar_memory_readd_by_index(u32 drc_index)
645 static int dlpar_memory_remove_by_ic(u32 lmbs_to_remove, u32 drc_index)
649 #endif /* CONFIG_MEMORY_HOTREMOVE */
651 static int dlpar_add_lmb(struct drmem_lmb *lmb)
653 unsigned long block_sz;
656 if (lmb->flags & DRCONF_MEM_ASSIGNED)
659 rc = update_lmb_associativity_index(lmb);
661 dlpar_release_drc(lmb->drc_index);
665 block_sz = memory_block_size_bytes();
667 /* Find the node id for this address */
668 nid = memory_add_physaddr_to_nid(lmb->base_addr);
671 rc = __add_memory(nid, lmb->base_addr, block_sz);
673 invalidate_lmb_associativity_index(lmb);
677 rc = dlpar_online_lmb(lmb);
679 __remove_memory(nid, lmb->base_addr, block_sz);
680 invalidate_lmb_associativity_index(lmb);
682 lmb->flags |= DRCONF_MEM_ASSIGNED;
688 static int dlpar_memory_add_by_count(u32 lmbs_to_add)
690 struct drmem_lmb *lmb;
691 int lmbs_available = 0;
695 pr_info("Attempting to hot-add %d LMB(s)\n", lmbs_to_add);
697 if (lmbs_to_add == 0)
700 /* Validate that there are enough LMBs to satisfy the request */
701 for_each_drmem_lmb(lmb) {
702 if (!(lmb->flags & DRCONF_MEM_ASSIGNED))
705 if (lmbs_available == lmbs_to_add)
709 if (lmbs_available < lmbs_to_add)
712 for_each_drmem_lmb(lmb) {
713 if (lmb->flags & DRCONF_MEM_ASSIGNED)
716 rc = dlpar_acquire_drc(lmb->drc_index);
720 rc = dlpar_add_lmb(lmb);
722 dlpar_release_drc(lmb->drc_index);
726 /* Mark this lmb so we can remove it later if all of the
727 * requested LMBs cannot be added.
729 drmem_mark_lmb_reserved(lmb);
732 if (lmbs_added == lmbs_to_add)
736 if (lmbs_added != lmbs_to_add) {
737 pr_err("Memory hot-add failed, removing any added LMBs\n");
739 for_each_drmem_lmb(lmb) {
740 if (!drmem_lmb_reserved(lmb))
743 rc = dlpar_remove_lmb(lmb);
745 pr_err("Failed to remove LMB, drc index %x\n",
748 dlpar_release_drc(lmb->drc_index);
750 drmem_remove_lmb_reservation(lmb);
754 for_each_drmem_lmb(lmb) {
755 if (!drmem_lmb_reserved(lmb))
758 pr_info("Memory at %llx (drc index %x) was hot-added\n",
759 lmb->base_addr, lmb->drc_index);
760 drmem_remove_lmb_reservation(lmb);
768 static int dlpar_memory_add_by_index(u32 drc_index)
770 struct drmem_lmb *lmb;
773 pr_info("Attempting to hot-add LMB, drc index %x\n", drc_index);
776 for_each_drmem_lmb(lmb) {
777 if (lmb->drc_index == drc_index) {
779 rc = dlpar_acquire_drc(lmb->drc_index);
781 rc = dlpar_add_lmb(lmb);
783 dlpar_release_drc(lmb->drc_index);
794 pr_info("Failed to hot-add memory, drc index %x\n", drc_index);
796 pr_info("Memory at %llx (drc index %x) was hot-added\n",
797 lmb->base_addr, drc_index);
802 static int dlpar_memory_add_by_ic(u32 lmbs_to_add, u32 drc_index)
804 struct drmem_lmb *lmb, *start_lmb, *end_lmb;
805 int lmbs_available = 0;
808 pr_info("Attempting to hot-add %u LMB(s) at index %x\n",
809 lmbs_to_add, drc_index);
811 if (lmbs_to_add == 0)
814 rc = get_lmb_range(drc_index, lmbs_to_add, &start_lmb, &end_lmb);
818 /* Validate that the LMBs in this range are not reserved */
819 for_each_drmem_lmb_in_range(lmb, start_lmb, end_lmb) {
820 if (lmb->flags & DRCONF_MEM_RESERVED)
826 if (lmbs_available < lmbs_to_add)
829 for_each_drmem_lmb_in_range(lmb, start_lmb, end_lmb) {
830 if (lmb->flags & DRCONF_MEM_ASSIGNED)
833 rc = dlpar_acquire_drc(lmb->drc_index);
837 rc = dlpar_add_lmb(lmb);
839 dlpar_release_drc(lmb->drc_index);
843 drmem_mark_lmb_reserved(lmb);
847 pr_err("Memory indexed-count-add failed, removing any added LMBs\n");
849 for_each_drmem_lmb_in_range(lmb, start_lmb, end_lmb) {
850 if (!drmem_lmb_reserved(lmb))
853 rc = dlpar_remove_lmb(lmb);
855 pr_err("Failed to remove LMB, drc index %x\n",
858 dlpar_release_drc(lmb->drc_index);
860 drmem_remove_lmb_reservation(lmb);
864 for_each_drmem_lmb_in_range(lmb, start_lmb, end_lmb) {
865 if (!drmem_lmb_reserved(lmb))
868 pr_info("Memory at %llx (drc index %x) was hot-added\n",
869 lmb->base_addr, lmb->drc_index);
870 drmem_remove_lmb_reservation(lmb);
877 int dlpar_memory(struct pseries_hp_errorlog *hp_elog)
879 u32 count, drc_index;
882 lock_device_hotplug();
884 switch (hp_elog->action) {
885 case PSERIES_HP_ELOG_ACTION_ADD:
886 if (hp_elog->id_type == PSERIES_HP_ELOG_ID_DRC_COUNT) {
887 count = hp_elog->_drc_u.drc_count;
888 rc = dlpar_memory_add_by_count(count);
889 } else if (hp_elog->id_type == PSERIES_HP_ELOG_ID_DRC_INDEX) {
890 drc_index = hp_elog->_drc_u.drc_index;
891 rc = dlpar_memory_add_by_index(drc_index);
892 } else if (hp_elog->id_type == PSERIES_HP_ELOG_ID_DRC_IC) {
893 count = hp_elog->_drc_u.ic.count;
894 drc_index = hp_elog->_drc_u.ic.index;
895 rc = dlpar_memory_add_by_ic(count, drc_index);
901 case PSERIES_HP_ELOG_ACTION_REMOVE:
902 if (hp_elog->id_type == PSERIES_HP_ELOG_ID_DRC_COUNT) {
903 count = hp_elog->_drc_u.drc_count;
904 rc = dlpar_memory_remove_by_count(count);
905 } else if (hp_elog->id_type == PSERIES_HP_ELOG_ID_DRC_INDEX) {
906 drc_index = hp_elog->_drc_u.drc_index;
907 rc = dlpar_memory_remove_by_index(drc_index);
908 } else if (hp_elog->id_type == PSERIES_HP_ELOG_ID_DRC_IC) {
909 count = hp_elog->_drc_u.ic.count;
910 drc_index = hp_elog->_drc_u.ic.index;
911 rc = dlpar_memory_remove_by_ic(count, drc_index);
917 case PSERIES_HP_ELOG_ACTION_READD:
918 drc_index = hp_elog->_drc_u.drc_index;
919 rc = dlpar_memory_readd_by_index(drc_index);
922 pr_err("Invalid action (%d) specified\n", hp_elog->action);
928 rtas_hp_event = true;
929 rc = drmem_update_dt();
930 rtas_hp_event = false;
933 unlock_device_hotplug();
937 static int pseries_add_mem_node(struct device_node *np)
942 unsigned int lmb_size;
946 * Check to see if we are actually adding memory
948 type = of_get_property(np, "device_type", NULL);
949 if (type == NULL || strcmp(type, "memory") != 0)
953 * Find the base and size of the memblock
955 regs = of_get_property(np, "reg", NULL);
959 base = be64_to_cpu(*(unsigned long *)regs);
960 lmb_size = be32_to_cpu(regs[3]);
963 * Update memory region to represent the memory add
965 ret = memblock_add(base, lmb_size);
966 return (ret < 0) ? -EINVAL : 0;
969 static int pseries_update_drconf_memory(struct of_reconfig_data *pr)
971 struct of_drconf_cell_v1 *new_drmem, *old_drmem;
972 unsigned long memblock_size;
980 memblock_size = pseries_memory_block_size();
984 p = (__be32 *) pr->old_prop->value;
988 /* The first int of the property is the number of lmb's described
989 * by the property. This is followed by an array of of_drconf_cell
990 * entries. Get the number of entries and skip to the array of
993 entries = be32_to_cpu(*p++);
994 old_drmem = (struct of_drconf_cell_v1 *)p;
996 p = (__be32 *)pr->prop->value;
998 new_drmem = (struct of_drconf_cell_v1 *)p;
1000 for (i = 0; i < entries; i++) {
1001 if ((be32_to_cpu(old_drmem[i].flags) & DRCONF_MEM_ASSIGNED) &&
1002 (!(be32_to_cpu(new_drmem[i].flags) & DRCONF_MEM_ASSIGNED))) {
1003 rc = pseries_remove_memblock(
1004 be64_to_cpu(old_drmem[i].base_addr),
1007 } else if ((!(be32_to_cpu(old_drmem[i].flags) &
1008 DRCONF_MEM_ASSIGNED)) &&
1009 (be32_to_cpu(new_drmem[i].flags) &
1010 DRCONF_MEM_ASSIGNED)) {
1011 rc = memblock_add(be64_to_cpu(old_drmem[i].base_addr),
1013 rc = (rc < 0) ? -EINVAL : 0;
1020 static int pseries_memory_notifier(struct notifier_block *nb,
1021 unsigned long action, void *data)
1023 struct of_reconfig_data *rd = data;
1027 case OF_RECONFIG_ATTACH_NODE:
1028 err = pseries_add_mem_node(rd->dn);
1030 case OF_RECONFIG_DETACH_NODE:
1031 err = pseries_remove_mem_node(rd->dn);
1033 case OF_RECONFIG_UPDATE_PROPERTY:
1034 if (!strcmp(rd->prop->name, "ibm,dynamic-memory"))
1035 err = pseries_update_drconf_memory(rd);
1038 return notifier_from_errno(err);
1041 static struct notifier_block pseries_mem_nb = {
1042 .notifier_call = pseries_memory_notifier,
1045 static int __init pseries_memory_hotplug_init(void)
1047 if (firmware_has_feature(FW_FEATURE_LPAR))
1048 of_reconfig_notifier_register(&pseries_mem_nb);
1052 machine_device_initcall(pseries, pseries_memory_hotplug_init);