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b2441318 | 1 | /* SPDX-License-Identifier: GPL-2.0 */ |
208d54e5 DH |
2 | #ifndef __LINUX_MEMORY_HOTPLUG_H |
3 | #define __LINUX_MEMORY_HOTPLUG_H | |
4 | ||
5 | #include <linux/mmzone.h> | |
6 | #include <linux/spinlock.h> | |
3947be19 | 7 | #include <linux/notifier.h> |
187f1882 | 8 | #include <linux/bug.h> |
208d54e5 | 9 | |
78679302 KH |
10 | struct page; |
11 | struct zone; | |
12 | struct pglist_data; | |
ea01ea93 | 13 | struct mem_section; |
e90bdb7f | 14 | struct memory_block; |
62cedb9f | 15 | struct resource; |
24e6d5a5 | 16 | struct vmem_altmap; |
78679302 | 17 | |
208d54e5 | 18 | #ifdef CONFIG_MEMORY_HOTPLUG |
2d070eab MH |
19 | /* |
20 | * Return page for the valid pfn only if the page is online. All pfn | |
21 | * walkers which rely on the fully initialized page->flags and others | |
22 | * should use this rather than pfn_valid && pfn_to_page | |
23 | */ | |
24 | #define pfn_to_online_page(pfn) \ | |
25 | ({ \ | |
26 | struct page *___page = NULL; \ | |
27 | unsigned long ___nr = pfn_to_section_nr(pfn); \ | |
28 | \ | |
29 | if (___nr < NR_MEM_SECTIONS && online_section_nr(___nr))\ | |
30 | ___page = pfn_to_page(pfn); \ | |
31 | ___page; \ | |
32 | }) | |
04753278 YG |
33 | |
34 | /* | |
5f24ce5f AA |
35 | * Types for free bootmem stored in page->lru.next. These have to be in |
36 | * some random range in unsigned long space for debugging purposes. | |
04753278 | 37 | */ |
5f24ce5f AA |
38 | enum { |
39 | MEMORY_HOTPLUG_MIN_BOOTMEM_TYPE = 12, | |
40 | SECTION_INFO = MEMORY_HOTPLUG_MIN_BOOTMEM_TYPE, | |
41 | MIX_SECTION_INFO, | |
42 | NODE_INFO, | |
43 | MEMORY_HOTPLUG_MAX_BOOTMEM_TYPE = NODE_INFO, | |
44 | }; | |
04753278 | 45 | |
4f7c6b49 | 46 | /* Types for control the zone type of onlined and offlined memory */ |
511c2aba | 47 | enum { |
4f7c6b49 TC |
48 | MMOP_OFFLINE = -1, |
49 | MMOP_ONLINE_KEEP, | |
50 | MMOP_ONLINE_KERNEL, | |
51 | MMOP_ONLINE_MOVABLE, | |
511c2aba LJ |
52 | }; |
53 | ||
bdc8cb98 DH |
54 | /* |
55 | * Zone resizing functions | |
511c2aba LJ |
56 | * |
57 | * Note: any attempt to resize a zone should has pgdat_resize_lock() | |
58 | * zone_span_writelock() both held. This ensure the size of a zone | |
59 | * can't be changed while pgdat_resize_lock() held. | |
bdc8cb98 DH |
60 | */ |
61 | static inline unsigned zone_span_seqbegin(struct zone *zone) | |
62 | { | |
63 | return read_seqbegin(&zone->span_seqlock); | |
64 | } | |
65 | static inline int zone_span_seqretry(struct zone *zone, unsigned iv) | |
66 | { | |
67 | return read_seqretry(&zone->span_seqlock, iv); | |
68 | } | |
69 | static inline void zone_span_writelock(struct zone *zone) | |
70 | { | |
71 | write_seqlock(&zone->span_seqlock); | |
72 | } | |
73 | static inline void zone_span_writeunlock(struct zone *zone) | |
74 | { | |
75 | write_sequnlock(&zone->span_seqlock); | |
76 | } | |
77 | static inline void zone_seqlock_init(struct zone *zone) | |
78 | { | |
79 | seqlock_init(&zone->span_seqlock); | |
80 | } | |
3947be19 DH |
81 | extern int zone_grow_free_lists(struct zone *zone, unsigned long new_nr_pages); |
82 | extern int zone_grow_waitqueues(struct zone *zone, unsigned long nr_pages); | |
83 | extern int add_one_highpage(struct page *page, int pfn, int bad_ppro); | |
3947be19 | 84 | /* VM interface that may be used by firmware interface */ |
511c2aba | 85 | extern int online_pages(unsigned long, unsigned long, int); |
a96dfddb TK |
86 | extern int test_pages_in_a_zone(unsigned long start_pfn, unsigned long end_pfn, |
87 | unsigned long *valid_start, unsigned long *valid_end); | |
0c0e6195 | 88 | extern void __offline_isolated_pages(unsigned long, unsigned long); |
48e94196 | 89 | |
9d0ad8ca DK |
90 | typedef void (*online_page_callback_t)(struct page *page); |
91 | ||
92 | extern int set_online_page_callback(online_page_callback_t callback); | |
93 | extern int restore_online_page_callback(online_page_callback_t callback); | |
94 | ||
95 | extern void __online_page_set_limits(struct page *page); | |
96 | extern void __online_page_increment_counters(struct page *page); | |
97 | extern void __online_page_free(struct page *page); | |
98 | ||
01b0f197 TK |
99 | extern int try_online_node(int nid); |
100 | ||
31bc3858 | 101 | extern bool memhp_auto_online; |
4932381e MH |
102 | /* If movable_node boot option specified */ |
103 | extern bool movable_node_enabled; | |
104 | static inline bool movable_node_is_enabled(void) | |
105 | { | |
106 | return movable_node_enabled; | |
107 | } | |
31bc3858 | 108 | |
49ac8255 | 109 | #ifdef CONFIG_MEMORY_HOTREMOVE |
da024512 CH |
110 | extern int arch_remove_memory(u64 start, u64 size, |
111 | struct vmem_altmap *altmap); | |
4edd7cef | 112 | extern int __remove_pages(struct zone *zone, unsigned long start_pfn, |
da024512 | 113 | unsigned long nr_pages, struct vmem_altmap *altmap); |
49ac8255 KH |
114 | #endif /* CONFIG_MEMORY_HOTREMOVE */ |
115 | ||
f1dd2cd1 | 116 | /* reasonably generic interface to expand the physical pages */ |
24e6d5a5 CH |
117 | extern int __add_pages(int nid, unsigned long start_pfn, unsigned long nr_pages, |
118 | struct vmem_altmap *altmap, bool want_memblock); | |
bc02af93 | 119 | |
3072e413 MH |
120 | #ifndef CONFIG_ARCH_HAS_ADD_PAGES |
121 | static inline int add_pages(int nid, unsigned long start_pfn, | |
24e6d5a5 CH |
122 | unsigned long nr_pages, struct vmem_altmap *altmap, |
123 | bool want_memblock) | |
3072e413 | 124 | { |
24e6d5a5 | 125 | return __add_pages(nid, start_pfn, nr_pages, altmap, want_memblock); |
3072e413 MH |
126 | } |
127 | #else /* ARCH_HAS_ADD_PAGES */ | |
24e6d5a5 CH |
128 | int add_pages(int nid, unsigned long start_pfn, unsigned long nr_pages, |
129 | struct vmem_altmap *altmap, bool want_memblock); | |
3072e413 MH |
130 | #endif /* ARCH_HAS_ADD_PAGES */ |
131 | ||
bc02af93 YG |
132 | #ifdef CONFIG_NUMA |
133 | extern int memory_add_physaddr_to_nid(u64 start); | |
134 | #else | |
135 | static inline int memory_add_physaddr_to_nid(u64 start) | |
136 | { | |
137 | return 0; | |
138 | } | |
139 | #endif | |
140 | ||
306d6cbe YG |
141 | #ifdef CONFIG_HAVE_ARCH_NODEDATA_EXTENSION |
142 | /* | |
143 | * For supporting node-hotadd, we have to allocate a new pgdat. | |
144 | * | |
145 | * If an arch has generic style NODE_DATA(), | |
146 | * node_data[nid] = kzalloc() works well. But it depends on the architecture. | |
147 | * | |
148 | * In general, generic_alloc_nodedata() is used. | |
149 | * Now, arch_free_nodedata() is just defined for error path of node_hot_add. | |
150 | * | |
151 | */ | |
dd0932d9 YG |
152 | extern pg_data_t *arch_alloc_nodedata(int nid); |
153 | extern void arch_free_nodedata(pg_data_t *pgdat); | |
7049027c | 154 | extern void arch_refresh_nodedata(int nid, pg_data_t *pgdat); |
306d6cbe YG |
155 | |
156 | #else /* CONFIG_HAVE_ARCH_NODEDATA_EXTENSION */ | |
157 | ||
158 | #define arch_alloc_nodedata(nid) generic_alloc_nodedata(nid) | |
159 | #define arch_free_nodedata(pgdat) generic_free_nodedata(pgdat) | |
160 | ||
161 | #ifdef CONFIG_NUMA | |
162 | /* | |
163 | * If ARCH_HAS_NODEDATA_EXTENSION=n, this func is used to allocate pgdat. | |
164 | * XXX: kmalloc_node() can't work well to get new node's memory at this time. | |
165 | * Because, pgdat for the new node is not allocated/initialized yet itself. | |
166 | * To use new node's memory, more consideration will be necessary. | |
167 | */ | |
168 | #define generic_alloc_nodedata(nid) \ | |
169 | ({ \ | |
170 | kzalloc(sizeof(pg_data_t), GFP_KERNEL); \ | |
171 | }) | |
172 | /* | |
173 | * This definition is just for error path in node hotadd. | |
174 | * For node hotremove, we have to replace this. | |
175 | */ | |
176 | #define generic_free_nodedata(pgdat) kfree(pgdat) | |
177 | ||
10ad400b YG |
178 | extern pg_data_t *node_data[]; |
179 | static inline void arch_refresh_nodedata(int nid, pg_data_t *pgdat) | |
180 | { | |
181 | node_data[nid] = pgdat; | |
182 | } | |
183 | ||
306d6cbe YG |
184 | #else /* !CONFIG_NUMA */ |
185 | ||
186 | /* never called */ | |
187 | static inline pg_data_t *generic_alloc_nodedata(int nid) | |
188 | { | |
189 | BUG(); | |
190 | return NULL; | |
191 | } | |
192 | static inline void generic_free_nodedata(pg_data_t *pgdat) | |
193 | { | |
194 | } | |
10ad400b YG |
195 | static inline void arch_refresh_nodedata(int nid, pg_data_t *pgdat) |
196 | { | |
197 | } | |
306d6cbe YG |
198 | #endif /* CONFIG_NUMA */ |
199 | #endif /* CONFIG_HAVE_ARCH_NODEDATA_EXTENSION */ | |
200 | ||
46723bfa | 201 | #ifdef CONFIG_HAVE_BOOTMEM_INFO_NODE |
7ded384a | 202 | extern void __init register_page_bootmem_info_node(struct pglist_data *pgdat); |
46723bfa | 203 | #else |
04753278 YG |
204 | static inline void register_page_bootmem_info_node(struct pglist_data *pgdat) |
205 | { | |
206 | } | |
04753278 | 207 | #endif |
46723bfa YI |
208 | extern void put_page_bootmem(struct page *page); |
209 | extern void get_page_bootmem(unsigned long ingo, struct page *page, | |
210 | unsigned long type); | |
04753278 | 211 | |
bfc8c901 VD |
212 | void get_online_mems(void); |
213 | void put_online_mems(void); | |
20d6c96b | 214 | |
30467e0b DR |
215 | void mem_hotplug_begin(void); |
216 | void mem_hotplug_done(void); | |
217 | ||
d883c6cf JK |
218 | extern void set_zone_contiguous(struct zone *zone); |
219 | extern void clear_zone_contiguous(struct zone *zone); | |
220 | ||
208d54e5 | 221 | #else /* ! CONFIG_MEMORY_HOTPLUG */ |
2d070eab MH |
222 | #define pfn_to_online_page(pfn) \ |
223 | ({ \ | |
224 | struct page *___page = NULL; \ | |
225 | if (pfn_valid(pfn)) \ | |
226 | ___page = pfn_to_page(pfn); \ | |
227 | ___page; \ | |
228 | }) | |
229 | ||
bdc8cb98 DH |
230 | static inline unsigned zone_span_seqbegin(struct zone *zone) |
231 | { | |
232 | return 0; | |
233 | } | |
234 | static inline int zone_span_seqretry(struct zone *zone, unsigned iv) | |
235 | { | |
236 | return 0; | |
237 | } | |
238 | static inline void zone_span_writelock(struct zone *zone) {} | |
239 | static inline void zone_span_writeunlock(struct zone *zone) {} | |
240 | static inline void zone_seqlock_init(struct zone *zone) {} | |
3947be19 DH |
241 | |
242 | static inline int mhp_notimplemented(const char *func) | |
243 | { | |
244 | printk(KERN_WARNING "%s() called, with CONFIG_MEMORY_HOTPLUG disabled\n", func); | |
245 | dump_stack(); | |
246 | return -ENOSYS; | |
247 | } | |
248 | ||
04753278 YG |
249 | static inline void register_page_bootmem_info_node(struct pglist_data *pgdat) |
250 | { | |
251 | } | |
252 | ||
01b0f197 TK |
253 | static inline int try_online_node(int nid) |
254 | { | |
255 | return 0; | |
256 | } | |
257 | ||
bfc8c901 VD |
258 | static inline void get_online_mems(void) {} |
259 | static inline void put_online_mems(void) {} | |
20d6c96b | 260 | |
30467e0b DR |
261 | static inline void mem_hotplug_begin(void) {} |
262 | static inline void mem_hotplug_done(void) {} | |
263 | ||
4932381e MH |
264 | static inline bool movable_node_is_enabled(void) |
265 | { | |
266 | return false; | |
267 | } | |
bdc8cb98 | 268 | #endif /* ! CONFIG_MEMORY_HOTPLUG */ |
9d99aaa3 | 269 | |
3a2d7fa8 PT |
270 | #if defined(CONFIG_MEMORY_HOTPLUG) || defined(CONFIG_DEFERRED_STRUCT_PAGE_INIT) |
271 | /* | |
272 | * pgdat resizing functions | |
273 | */ | |
274 | static inline | |
275 | void pgdat_resize_lock(struct pglist_data *pgdat, unsigned long *flags) | |
276 | { | |
277 | spin_lock_irqsave(&pgdat->node_size_lock, *flags); | |
278 | } | |
279 | static inline | |
280 | void pgdat_resize_unlock(struct pglist_data *pgdat, unsigned long *flags) | |
281 | { | |
282 | spin_unlock_irqrestore(&pgdat->node_size_lock, *flags); | |
283 | } | |
284 | static inline | |
285 | void pgdat_resize_init(struct pglist_data *pgdat) | |
286 | { | |
287 | spin_lock_init(&pgdat->node_size_lock); | |
288 | } | |
289 | #else /* !(CONFIG_MEMORY_HOTPLUG || CONFIG_DEFERRED_STRUCT_PAGE_INIT) */ | |
290 | /* | |
291 | * Stub functions for when hotplug is off | |
292 | */ | |
293 | static inline void pgdat_resize_lock(struct pglist_data *p, unsigned long *f) {} | |
294 | static inline void pgdat_resize_unlock(struct pglist_data *p, unsigned long *f) {} | |
295 | static inline void pgdat_resize_init(struct pglist_data *pgdat) {} | |
296 | #endif /* !(CONFIG_MEMORY_HOTPLUG || CONFIG_DEFERRED_STRUCT_PAGE_INIT) */ | |
297 | ||
5c755e9f BP |
298 | #ifdef CONFIG_MEMORY_HOTREMOVE |
299 | ||
c98940f6 | 300 | extern bool is_mem_section_removable(unsigned long pfn, unsigned long nr_pages); |
90b30cdc | 301 | extern void try_offline_node(int nid); |
aba6efc4 RW |
302 | extern int offline_pages(unsigned long start_pfn, unsigned long nr_pages); |
303 | extern void remove_memory(int nid, u64 start, u64 size); | |
d15e5926 | 304 | extern void __remove_memory(int nid, u64 start, u64 size); |
5c755e9f BP |
305 | |
306 | #else | |
c98940f6 | 307 | static inline bool is_mem_section_removable(unsigned long pfn, |
5c755e9f BP |
308 | unsigned long nr_pages) |
309 | { | |
c98940f6 | 310 | return false; |
5c755e9f | 311 | } |
90b30cdc WC |
312 | |
313 | static inline void try_offline_node(int nid) {} | |
aba6efc4 RW |
314 | |
315 | static inline int offline_pages(unsigned long start_pfn, unsigned long nr_pages) | |
316 | { | |
317 | return -EINVAL; | |
318 | } | |
319 | ||
320 | static inline void remove_memory(int nid, u64 start, u64 size) {} | |
d15e5926 | 321 | static inline void __remove_memory(int nid, u64 start, u64 size) {} |
5c755e9f BP |
322 | #endif /* CONFIG_MEMORY_HOTREMOVE */ |
323 | ||
03e85f9d | 324 | extern void __ref free_area_init_core_hotplug(int nid); |
e2ff3940 RW |
325 | extern int walk_memory_range(unsigned long start_pfn, unsigned long end_pfn, |
326 | void *arg, int (*func)(struct memory_block *, void *)); | |
8df1d0e4 | 327 | extern int __add_memory(int nid, u64 start, u64 size); |
bc02af93 | 328 | extern int add_memory(int nid, u64 start, u64 size); |
31bc3858 | 329 | extern int add_memory_resource(int nid, struct resource *resource, bool online); |
24e6d5a5 CH |
330 | extern int arch_add_memory(int nid, u64 start, u64 size, |
331 | struct vmem_altmap *altmap, bool want_memblock); | |
f1dd2cd1 | 332 | extern void move_pfn_range_to_zone(struct zone *zone, unsigned long start_pfn, |
a99583e7 | 333 | unsigned long nr_pages, struct vmem_altmap *altmap); |
a16cee10 | 334 | extern int offline_pages(unsigned long start_pfn, unsigned long nr_pages); |
6677e3ea | 335 | extern bool is_memblock_offlined(struct memory_block *mem); |
7b73d978 CH |
336 | extern int sparse_add_one_section(struct pglist_data *pgdat, |
337 | unsigned long start_pfn, struct vmem_altmap *altmap); | |
4b94ffdc | 338 | extern void sparse_remove_one_section(struct zone *zone, struct mem_section *ms, |
24b6d416 | 339 | unsigned long map_offset, struct vmem_altmap *altmap); |
04753278 YG |
340 | extern struct page *sparse_decode_mem_map(unsigned long coded_mem_map, |
341 | unsigned long pnum); | |
f1dd2cd1 MH |
342 | extern bool allow_online_pfn_range(int nid, unsigned long pfn, unsigned long nr_pages, |
343 | int online_type); | |
e5e68930 | 344 | extern struct zone *zone_for_pfn_range(int online_type, int nid, unsigned start_pfn, |
c246a213 | 345 | unsigned long nr_pages); |
208d54e5 | 346 | #endif /* __LINUX_MEMORY_HOTPLUG_H */ |