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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; |
78679302 | 16 | |
208d54e5 | 17 | #ifdef CONFIG_MEMORY_HOTPLUG |
2d070eab MH |
18 | /* |
19 | * Return page for the valid pfn only if the page is online. All pfn | |
20 | * walkers which rely on the fully initialized page->flags and others | |
21 | * should use this rather than pfn_valid && pfn_to_page | |
22 | */ | |
ada8b8da QC |
23 | #define pfn_to_online_page(pfn) \ |
24 | ({ \ | |
25 | struct page *___page = NULL; \ | |
26 | unsigned long ___pfn = pfn; \ | |
27 | unsigned long ___nr = pfn_to_section_nr(___pfn); \ | |
28 | \ | |
29 | if (___nr < NR_MEM_SECTIONS && online_section_nr(___nr) && \ | |
30 | pfn_valid_within(___pfn)) \ | |
31 | ___page = pfn_to_page(___pfn); \ | |
32 | ___page; \ | |
2d070eab | 33 | }) |
04753278 YG |
34 | |
35 | /* | |
5f24ce5f AA |
36 | * Types for free bootmem stored in page->lru.next. These have to be in |
37 | * some random range in unsigned long space for debugging purposes. | |
04753278 | 38 | */ |
5f24ce5f AA |
39 | enum { |
40 | MEMORY_HOTPLUG_MIN_BOOTMEM_TYPE = 12, | |
41 | SECTION_INFO = MEMORY_HOTPLUG_MIN_BOOTMEM_TYPE, | |
42 | MIX_SECTION_INFO, | |
43 | NODE_INFO, | |
44 | MEMORY_HOTPLUG_MAX_BOOTMEM_TYPE = NODE_INFO, | |
45 | }; | |
04753278 | 46 | |
4f7c6b49 | 47 | /* Types for control the zone type of onlined and offlined memory */ |
511c2aba | 48 | enum { |
4f7c6b49 TC |
49 | MMOP_OFFLINE = -1, |
50 | MMOP_ONLINE_KEEP, | |
51 | MMOP_ONLINE_KERNEL, | |
52 | MMOP_ONLINE_MOVABLE, | |
511c2aba LJ |
53 | }; |
54 | ||
208d54e5 DH |
55 | /* |
56 | * pgdat resizing functions | |
57 | */ | |
58 | static inline | |
59 | void pgdat_resize_lock(struct pglist_data *pgdat, unsigned long *flags) | |
60 | { | |
61 | spin_lock_irqsave(&pgdat->node_size_lock, *flags); | |
62 | } | |
63 | static inline | |
64 | void pgdat_resize_unlock(struct pglist_data *pgdat, unsigned long *flags) | |
65 | { | |
bdc8cb98 | 66 | spin_unlock_irqrestore(&pgdat->node_size_lock, *flags); |
208d54e5 DH |
67 | } |
68 | static inline | |
69 | void pgdat_resize_init(struct pglist_data *pgdat) | |
70 | { | |
71 | spin_lock_init(&pgdat->node_size_lock); | |
72 | } | |
bdc8cb98 DH |
73 | /* |
74 | * Zone resizing functions | |
511c2aba LJ |
75 | * |
76 | * Note: any attempt to resize a zone should has pgdat_resize_lock() | |
77 | * zone_span_writelock() both held. This ensure the size of a zone | |
78 | * can't be changed while pgdat_resize_lock() held. | |
bdc8cb98 DH |
79 | */ |
80 | static inline unsigned zone_span_seqbegin(struct zone *zone) | |
81 | { | |
82 | return read_seqbegin(&zone->span_seqlock); | |
83 | } | |
84 | static inline int zone_span_seqretry(struct zone *zone, unsigned iv) | |
85 | { | |
86 | return read_seqretry(&zone->span_seqlock, iv); | |
87 | } | |
88 | static inline void zone_span_writelock(struct zone *zone) | |
89 | { | |
90 | write_seqlock(&zone->span_seqlock); | |
91 | } | |
92 | static inline void zone_span_writeunlock(struct zone *zone) | |
93 | { | |
94 | write_sequnlock(&zone->span_seqlock); | |
95 | } | |
96 | static inline void zone_seqlock_init(struct zone *zone) | |
97 | { | |
98 | seqlock_init(&zone->span_seqlock); | |
99 | } | |
3947be19 DH |
100 | extern int zone_grow_free_lists(struct zone *zone, unsigned long new_nr_pages); |
101 | extern int zone_grow_waitqueues(struct zone *zone, unsigned long nr_pages); | |
102 | extern int add_one_highpage(struct page *page, int pfn, int bad_ppro); | |
3947be19 | 103 | /* VM interface that may be used by firmware interface */ |
511c2aba | 104 | extern int online_pages(unsigned long, unsigned long, int); |
a96dfddb TK |
105 | extern int test_pages_in_a_zone(unsigned long start_pfn, unsigned long end_pfn, |
106 | unsigned long *valid_start, unsigned long *valid_end); | |
0c0e6195 | 107 | extern void __offline_isolated_pages(unsigned long, unsigned long); |
48e94196 | 108 | |
9d0ad8ca DK |
109 | typedef void (*online_page_callback_t)(struct page *page); |
110 | ||
111 | extern int set_online_page_callback(online_page_callback_t callback); | |
112 | extern int restore_online_page_callback(online_page_callback_t callback); | |
113 | ||
114 | extern void __online_page_set_limits(struct page *page); | |
115 | extern void __online_page_increment_counters(struct page *page); | |
116 | extern void __online_page_free(struct page *page); | |
117 | ||
01b0f197 TK |
118 | extern int try_online_node(int nid); |
119 | ||
31bc3858 | 120 | extern bool memhp_auto_online; |
4932381e MH |
121 | /* If movable_node boot option specified */ |
122 | extern bool movable_node_enabled; | |
123 | static inline bool movable_node_is_enabled(void) | |
124 | { | |
125 | return movable_node_enabled; | |
126 | } | |
31bc3858 | 127 | |
49ac8255 KH |
128 | #ifdef CONFIG_MEMORY_HOTREMOVE |
129 | extern bool is_pageblock_removable_nolock(struct page *page); | |
24d335ca | 130 | extern int arch_remove_memory(u64 start, u64 size); |
4edd7cef DR |
131 | extern int __remove_pages(struct zone *zone, unsigned long start_pfn, |
132 | unsigned long nr_pages); | |
49ac8255 KH |
133 | #endif /* CONFIG_MEMORY_HOTREMOVE */ |
134 | ||
f1dd2cd1 MH |
135 | /* reasonably generic interface to expand the physical pages */ |
136 | extern int __add_pages(int nid, unsigned long start_pfn, | |
1b862aec | 137 | unsigned long nr_pages, bool want_memblock); |
bc02af93 | 138 | |
3072e413 MH |
139 | #ifndef CONFIG_ARCH_HAS_ADD_PAGES |
140 | static inline int add_pages(int nid, unsigned long start_pfn, | |
141 | unsigned long nr_pages, bool want_memblock) | |
142 | { | |
143 | return __add_pages(nid, start_pfn, nr_pages, want_memblock); | |
144 | } | |
145 | #else /* ARCH_HAS_ADD_PAGES */ | |
146 | int add_pages(int nid, unsigned long start_pfn, | |
147 | unsigned long nr_pages, bool want_memblock); | |
148 | #endif /* ARCH_HAS_ADD_PAGES */ | |
149 | ||
bc02af93 YG |
150 | #ifdef CONFIG_NUMA |
151 | extern int memory_add_physaddr_to_nid(u64 start); | |
152 | #else | |
153 | static inline int memory_add_physaddr_to_nid(u64 start) | |
154 | { | |
155 | return 0; | |
156 | } | |
157 | #endif | |
158 | ||
306d6cbe YG |
159 | #ifdef CONFIG_HAVE_ARCH_NODEDATA_EXTENSION |
160 | /* | |
161 | * For supporting node-hotadd, we have to allocate a new pgdat. | |
162 | * | |
163 | * If an arch has generic style NODE_DATA(), | |
164 | * node_data[nid] = kzalloc() works well. But it depends on the architecture. | |
165 | * | |
166 | * In general, generic_alloc_nodedata() is used. | |
167 | * Now, arch_free_nodedata() is just defined for error path of node_hot_add. | |
168 | * | |
169 | */ | |
dd0932d9 YG |
170 | extern pg_data_t *arch_alloc_nodedata(int nid); |
171 | extern void arch_free_nodedata(pg_data_t *pgdat); | |
7049027c | 172 | extern void arch_refresh_nodedata(int nid, pg_data_t *pgdat); |
306d6cbe YG |
173 | |
174 | #else /* CONFIG_HAVE_ARCH_NODEDATA_EXTENSION */ | |
175 | ||
176 | #define arch_alloc_nodedata(nid) generic_alloc_nodedata(nid) | |
177 | #define arch_free_nodedata(pgdat) generic_free_nodedata(pgdat) | |
178 | ||
179 | #ifdef CONFIG_NUMA | |
180 | /* | |
181 | * If ARCH_HAS_NODEDATA_EXTENSION=n, this func is used to allocate pgdat. | |
182 | * XXX: kmalloc_node() can't work well to get new node's memory at this time. | |
183 | * Because, pgdat for the new node is not allocated/initialized yet itself. | |
184 | * To use new node's memory, more consideration will be necessary. | |
185 | */ | |
186 | #define generic_alloc_nodedata(nid) \ | |
187 | ({ \ | |
188 | kzalloc(sizeof(pg_data_t), GFP_KERNEL); \ | |
189 | }) | |
190 | /* | |
191 | * This definition is just for error path in node hotadd. | |
192 | * For node hotremove, we have to replace this. | |
193 | */ | |
194 | #define generic_free_nodedata(pgdat) kfree(pgdat) | |
195 | ||
10ad400b YG |
196 | extern pg_data_t *node_data[]; |
197 | static inline void arch_refresh_nodedata(int nid, pg_data_t *pgdat) | |
198 | { | |
199 | node_data[nid] = pgdat; | |
200 | } | |
201 | ||
306d6cbe YG |
202 | #else /* !CONFIG_NUMA */ |
203 | ||
204 | /* never called */ | |
205 | static inline pg_data_t *generic_alloc_nodedata(int nid) | |
206 | { | |
207 | BUG(); | |
208 | return NULL; | |
209 | } | |
210 | static inline void generic_free_nodedata(pg_data_t *pgdat) | |
211 | { | |
212 | } | |
10ad400b YG |
213 | static inline void arch_refresh_nodedata(int nid, pg_data_t *pgdat) |
214 | { | |
215 | } | |
306d6cbe YG |
216 | #endif /* CONFIG_NUMA */ |
217 | #endif /* CONFIG_HAVE_ARCH_NODEDATA_EXTENSION */ | |
218 | ||
46723bfa | 219 | #ifdef CONFIG_HAVE_BOOTMEM_INFO_NODE |
7ded384a | 220 | extern void __init register_page_bootmem_info_node(struct pglist_data *pgdat); |
46723bfa | 221 | #else |
04753278 YG |
222 | static inline void register_page_bootmem_info_node(struct pglist_data *pgdat) |
223 | { | |
224 | } | |
04753278 | 225 | #endif |
46723bfa YI |
226 | extern void put_page_bootmem(struct page *page); |
227 | extern void get_page_bootmem(unsigned long ingo, struct page *page, | |
228 | unsigned long type); | |
04753278 | 229 | |
bfc8c901 VD |
230 | void get_online_mems(void); |
231 | void put_online_mems(void); | |
20d6c96b | 232 | |
30467e0b DR |
233 | void mem_hotplug_begin(void); |
234 | void mem_hotplug_done(void); | |
235 | ||
46e81a18 SF |
236 | void set_default_mem_hotplug_zone(enum zone_type zone); |
237 | ||
7cf91a98 JK |
238 | extern void set_zone_contiguous(struct zone *zone); |
239 | extern void clear_zone_contiguous(struct zone *zone); | |
240 | ||
208d54e5 | 241 | #else /* ! CONFIG_MEMORY_HOTPLUG */ |
2d070eab MH |
242 | #define pfn_to_online_page(pfn) \ |
243 | ({ \ | |
244 | struct page *___page = NULL; \ | |
245 | if (pfn_valid(pfn)) \ | |
246 | ___page = pfn_to_page(pfn); \ | |
247 | ___page; \ | |
248 | }) | |
249 | ||
208d54e5 DH |
250 | /* |
251 | * Stub functions for when hotplug is off | |
252 | */ | |
253 | static inline void pgdat_resize_lock(struct pglist_data *p, unsigned long *f) {} | |
254 | static inline void pgdat_resize_unlock(struct pglist_data *p, unsigned long *f) {} | |
255 | static inline void pgdat_resize_init(struct pglist_data *pgdat) {} | |
bdc8cb98 DH |
256 | |
257 | static inline unsigned zone_span_seqbegin(struct zone *zone) | |
258 | { | |
259 | return 0; | |
260 | } | |
261 | static inline int zone_span_seqretry(struct zone *zone, unsigned iv) | |
262 | { | |
263 | return 0; | |
264 | } | |
265 | static inline void zone_span_writelock(struct zone *zone) {} | |
266 | static inline void zone_span_writeunlock(struct zone *zone) {} | |
267 | static inline void zone_seqlock_init(struct zone *zone) {} | |
3947be19 DH |
268 | |
269 | static inline int mhp_notimplemented(const char *func) | |
270 | { | |
271 | printk(KERN_WARNING "%s() called, with CONFIG_MEMORY_HOTPLUG disabled\n", func); | |
272 | dump_stack(); | |
273 | return -ENOSYS; | |
274 | } | |
275 | ||
04753278 YG |
276 | static inline void register_page_bootmem_info_node(struct pglist_data *pgdat) |
277 | { | |
278 | } | |
279 | ||
01b0f197 TK |
280 | static inline int try_online_node(int nid) |
281 | { | |
282 | return 0; | |
283 | } | |
284 | ||
bfc8c901 VD |
285 | static inline void get_online_mems(void) {} |
286 | static inline void put_online_mems(void) {} | |
20d6c96b | 287 | |
30467e0b DR |
288 | static inline void mem_hotplug_begin(void) {} |
289 | static inline void mem_hotplug_done(void) {} | |
290 | ||
46e81a18 SF |
291 | static inline void set_default_mem_hotplug_zone(enum zone_type zone) {} |
292 | ||
4932381e MH |
293 | static inline bool movable_node_is_enabled(void) |
294 | { | |
295 | return false; | |
296 | } | |
bdc8cb98 | 297 | #endif /* ! CONFIG_MEMORY_HOTPLUG */ |
9d99aaa3 | 298 | |
5c755e9f BP |
299 | #ifdef CONFIG_MEMORY_HOTREMOVE |
300 | ||
c98940f6 | 301 | extern bool is_mem_section_removable(unsigned long pfn, unsigned long nr_pages); |
90b30cdc | 302 | extern void try_offline_node(int nid); |
aba6efc4 RW |
303 | extern int offline_pages(unsigned long start_pfn, unsigned long nr_pages); |
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) {} | |
5c755e9f BP |
321 | #endif /* CONFIG_MEMORY_HOTREMOVE */ |
322 | ||
e2ff3940 RW |
323 | extern int walk_memory_range(unsigned long start_pfn, unsigned long end_pfn, |
324 | void *arg, int (*func)(struct memory_block *, void *)); | |
de29654b | 325 | extern int __add_memory(int nid, u64 start, u64 size); |
bc02af93 | 326 | extern int add_memory(int nid, u64 start, u64 size); |
31bc3858 | 327 | extern int add_memory_resource(int nid, struct resource *resource, bool online); |
3d79a728 | 328 | extern int arch_add_memory(int nid, u64 start, u64 size, bool want_memblock); |
f1dd2cd1 MH |
329 | extern void move_pfn_range_to_zone(struct zone *zone, unsigned long start_pfn, |
330 | unsigned long nr_pages); | |
a16cee10 | 331 | extern int offline_pages(unsigned long start_pfn, unsigned long nr_pages); |
6677e3ea | 332 | extern bool is_memblock_offlined(struct memory_block *mem); |
242831eb | 333 | extern void remove_memory(int nid, u64 start, u64 size); |
f1dd2cd1 | 334 | extern int sparse_add_one_section(struct pglist_data *pgdat, unsigned long start_pfn); |
4b94ffdc DW |
335 | extern void sparse_remove_one_section(struct zone *zone, struct mem_section *ms, |
336 | unsigned long map_offset); | |
04753278 YG |
337 | extern struct page *sparse_decode_mem_map(unsigned long coded_mem_map, |
338 | unsigned long pnum); | |
f1dd2cd1 MH |
339 | extern bool allow_online_pfn_range(int nid, unsigned long pfn, unsigned long nr_pages, |
340 | int online_type); | |
e5e68930 | 341 | extern struct zone *zone_for_pfn_range(int online_type, int nid, unsigned start_pfn, |
c246a213 | 342 | unsigned long nr_pages); |
208d54e5 | 343 | #endif /* __LINUX_MEMORY_HOTPLUG_H */ |