[mirror_ubuntu-kernels.git] / include / linux / memory_hotplug.h

/* SPDX-License-Identifier: GPL-2.0 */
#ifndef __LINUX_MEMORY_HOTPLUG_H
#define __LINUX_MEMORY_HOTPLUG_H

#include <linux/mmzone.h>
#include <linux/spinlock.h>
#include <linux/notifier.h>
#include <linux/bug.h>

struct page;
struct zone;
struct pglist_data;
struct mem_section;
struct memory_block;
struct resource;
struct vmem_altmap;

#ifdef CONFIG_MEMORY_HOTPLUG
struct page *pfn_to_online_page(unsigned long pfn);

/*
 * Types for free bootmem stored in page->lru.next. These have to be in
 * some random range in unsigned long space for debugging purposes.
 */
enum {
	MEMORY_HOTPLUG_MIN_BOOTMEM_TYPE = 12,
	SECTION_INFO = MEMORY_HOTPLUG_MIN_BOOTMEM_TYPE,
	MIX_SECTION_INFO,
	NODE_INFO,
	MEMORY_HOTPLUG_MAX_BOOTMEM_TYPE = NODE_INFO,
};

/* Types for control the zone type of onlined and offlined memory */
enum {
	/* Offline the memory. */
	MMOP_OFFLINE = 0,
	/* Online the memory. Zone depends, see default_zone_for_pfn(). */
	MMOP_ONLINE,
	/* Online the memory to ZONE_NORMAL. */
	MMOP_ONLINE_KERNEL,
	/* Online the memory to ZONE_MOVABLE. */
	MMOP_ONLINE_MOVABLE,
};

/* Flags for add_memory() and friends to specify memory hotplug details. */
typedef int __bitwise mhp_t;

/* No special request */
#define MHP_NONE		((__force mhp_t)0)
/*
 * Allow merging of the added System RAM resource with adjacent,
 * mergeable resources. After a successful call to add_memory_resource()
 * with this flag set, the resource pointer must no longer be used as it
 * might be stale, or the resource might have changed.
 */
#define MHP_MERGE_RESOURCE	((__force mhp_t)BIT(0))

/*
 * Extended parameters for memory hotplug:
 * altmap: alternative allocator for memmap array (optional)
 * pgprot: page protection flags to apply to newly created page tables
 *	(required)
 */
struct mhp_params {
	struct vmem_altmap *altmap;
	pgprot_t pgprot;
};

bool mhp_range_allowed(u64 start, u64 size, bool need_mapping);
struct range mhp_get_pluggable_range(bool need_mapping);

/*
 * Zone resizing functions
 *
 * Note: any attempt to resize a zone should has pgdat_resize_lock()
 * zone_span_writelock() both held. This ensure the size of a zone
 * can't be changed while pgdat_resize_lock() held.
 */
static inline unsigned zone_span_seqbegin(struct zone *zone)
{
	return read_seqbegin(&zone->span_seqlock);
}
static inline int zone_span_seqretry(struct zone *zone, unsigned iv)
{
	return read_seqretry(&zone->span_seqlock, iv);
}
static inline void zone_span_writelock(struct zone *zone)
{
	write_seqlock(&zone->span_seqlock);
}
static inline void zone_span_writeunlock(struct zone *zone)
{
	write_sequnlock(&zone->span_seqlock);
}
static inline void zone_seqlock_init(struct zone *zone)
{
	seqlock_init(&zone->span_seqlock);
}
extern int zone_grow_free_lists(struct zone *zone, unsigned long new_nr_pages);
extern int zone_grow_waitqueues(struct zone *zone, unsigned long nr_pages);
extern int add_one_highpage(struct page *page, int pfn, int bad_ppro);
/* VM interface that may be used by firmware interface */
extern int online_pages(unsigned long pfn, unsigned long nr_pages,
			int online_type, int nid);
extern struct zone *test_pages_in_a_zone(unsigned long start_pfn,
					 unsigned long end_pfn);
extern void __offline_isolated_pages(unsigned long start_pfn,
				     unsigned long end_pfn);

typedef void (*online_page_callback_t)(struct page *page, unsigned int order);

extern void generic_online_page(struct page *page, unsigned int order);
extern int set_online_page_callback(online_page_callback_t callback);
extern int restore_online_page_callback(online_page_callback_t callback);

extern int try_online_node(int nid);

extern int arch_add_memory(int nid, u64 start, u64 size,
			   struct mhp_params *params);
extern u64 max_mem_size;

extern int mhp_online_type_from_str(const char *str);

/* Default online_type (MMOP_*) when new memory blocks are added. */
extern int mhp_default_online_type;
/* If movable_node boot option specified */
extern bool movable_node_enabled;
static inline bool movable_node_is_enabled(void)
{
	return movable_node_enabled;
}

extern void arch_remove_memory(int nid, u64 start, u64 size,
			       struct vmem_altmap *altmap);
extern void __remove_pages(unsigned long start_pfn, unsigned long nr_pages,
			   struct vmem_altmap *altmap);

/* reasonably generic interface to expand the physical pages */
extern int __add_pages(int nid, unsigned long start_pfn, unsigned long nr_pages,
		       struct mhp_params *params);

#ifndef CONFIG_ARCH_HAS_ADD_PAGES
static inline int add_pages(int nid, unsigned long start_pfn,
		unsigned long nr_pages, struct mhp_params *params)
{
	return __add_pages(nid, start_pfn, nr_pages, params);
}
#else /* ARCH_HAS_ADD_PAGES */
int add_pages(int nid, unsigned long start_pfn, unsigned long nr_pages,
	      struct mhp_params *params);
#endif /* ARCH_HAS_ADD_PAGES */

#ifdef CONFIG_HAVE_ARCH_NODEDATA_EXTENSION
/*
 * For supporting node-hotadd, we have to allocate a new pgdat.
 *
 * If an arch has generic style NODE_DATA(),
 * node_data[nid] = kzalloc() works well. But it depends on the architecture.
 *
 * In general, generic_alloc_nodedata() is used.
 * Now, arch_free_nodedata() is just defined for error path of node_hot_add.
 *
 */
extern pg_data_t *arch_alloc_nodedata(int nid);
extern void arch_free_nodedata(pg_data_t *pgdat);
extern void arch_refresh_nodedata(int nid, pg_data_t *pgdat);

#else /* CONFIG_HAVE_ARCH_NODEDATA_EXTENSION */

#define arch_alloc_nodedata(nid)	generic_alloc_nodedata(nid)
#define arch_free_nodedata(pgdat)	generic_free_nodedata(pgdat)

#ifdef CONFIG_NUMA
/*
 * If ARCH_HAS_NODEDATA_EXTENSION=n, this func is used to allocate pgdat.
 * XXX: kmalloc_node() can't work well to get new node's memory at this time.
 *	Because, pgdat for the new node is not allocated/initialized yet itself.
 *	To use new node's memory, more consideration will be necessary.
 */
#define generic_alloc_nodedata(nid)				\
({								\
	kzalloc(sizeof(pg_data_t), GFP_KERNEL);			\
})
/*
 * This definition is just for error path in node hotadd.
 * For node hotremove, we have to replace this.
 */
#define generic_free_nodedata(pgdat)	kfree(pgdat)

extern pg_data_t *node_data[];
static inline void arch_refresh_nodedata(int nid, pg_data_t *pgdat)
{
	node_data[nid] = pgdat;
}

#else /* !CONFIG_NUMA */

/* never called */
static inline pg_data_t *generic_alloc_nodedata(int nid)
{
	BUG();
	return NULL;
}
static inline void generic_free_nodedata(pg_data_t *pgdat)
{
}
static inline void arch_refresh_nodedata(int nid, pg_data_t *pgdat)
{
}
#endif /* CONFIG_NUMA */
#endif /* CONFIG_HAVE_ARCH_NODEDATA_EXTENSION */

#ifdef CONFIG_HAVE_BOOTMEM_INFO_NODE
extern void __init register_page_bootmem_info_node(struct pglist_data *pgdat);
#else
static inline void register_page_bootmem_info_node(struct pglist_data *pgdat)
{
}
#endif
extern void put_page_bootmem(struct page *page);
extern void get_page_bootmem(unsigned long ingo, struct page *page,
			     unsigned long type);

void get_online_mems(void);
void put_online_mems(void);

void mem_hotplug_begin(void);
void mem_hotplug_done(void);

#else /* ! CONFIG_MEMORY_HOTPLUG */
#define pfn_to_online_page(pfn)			\
({						\
	struct page *___page = NULL;		\
	if (pfn_valid(pfn))			\
		___page = pfn_to_page(pfn);	\
	___page;				\
 })

static inline unsigned zone_span_seqbegin(struct zone *zone)
{
	return 0;
}
static inline int zone_span_seqretry(struct zone *zone, unsigned iv)
{
	return 0;
}
static inline void zone_span_writelock(struct zone *zone) {}
static inline void zone_span_writeunlock(struct zone *zone) {}
static inline void zone_seqlock_init(struct zone *zone) {}

static inline void register_page_bootmem_info_node(struct pglist_data *pgdat)
{
}

static inline int try_online_node(int nid)
{
	return 0;
}

static inline void get_online_mems(void) {}
static inline void put_online_mems(void) {}

static inline void mem_hotplug_begin(void) {}
static inline void mem_hotplug_done(void) {}

static inline bool movable_node_is_enabled(void)
{
	return false;
}
#endif /* ! CONFIG_MEMORY_HOTPLUG */

/*
 * Keep this declaration outside CONFIG_MEMORY_HOTPLUG as some
 * platforms might override and use arch_get_mappable_range()
 * for internal non memory hotplug purposes.
 */
struct range arch_get_mappable_range(void);

#if defined(CONFIG_MEMORY_HOTPLUG) || defined(CONFIG_DEFERRED_STRUCT_PAGE_INIT)
/*
 * pgdat resizing functions
 */
static inline
void pgdat_resize_lock(struct pglist_data *pgdat, unsigned long *flags)
{
	spin_lock_irqsave(&pgdat->node_size_lock, *flags);
}
static inline
void pgdat_resize_unlock(struct pglist_data *pgdat, unsigned long *flags)
{
	spin_unlock_irqrestore(&pgdat->node_size_lock, *flags);
}
static inline
void pgdat_resize_init(struct pglist_data *pgdat)
{
	spin_lock_init(&pgdat->node_size_lock);
}
#else /* !(CONFIG_MEMORY_HOTPLUG || CONFIG_DEFERRED_STRUCT_PAGE_INIT) */
/*
 * Stub functions for when hotplug is off
 */
static inline void pgdat_resize_lock(struct pglist_data *p, unsigned long *f) {}
static inline void pgdat_resize_unlock(struct pglist_data *p, unsigned long *f) {}
static inline void pgdat_resize_init(struct pglist_data *pgdat) {}
#endif /* !(CONFIG_MEMORY_HOTPLUG || CONFIG_DEFERRED_STRUCT_PAGE_INIT) */

#ifdef CONFIG_MEMORY_HOTREMOVE

extern void try_offline_node(int nid);
extern int offline_pages(unsigned long start_pfn, unsigned long nr_pages);
extern int remove_memory(int nid, u64 start, u64 size);
extern void __remove_memory(int nid, u64 start, u64 size);
extern int offline_and_remove_memory(int nid, u64 start, u64 size);

#else
static inline void try_offline_node(int nid) {}

static inline int offline_pages(unsigned long start_pfn, unsigned long nr_pages)
{
	return -EINVAL;
}

static inline int remove_memory(int nid, u64 start, u64 size)
{
	return -EBUSY;
}

static inline void __remove_memory(int nid, u64 start, u64 size) {}
#endif /* CONFIG_MEMORY_HOTREMOVE */

extern void set_zone_contiguous(struct zone *zone);
extern void clear_zone_contiguous(struct zone *zone);

#ifdef CONFIG_MEMORY_HOTPLUG
extern void __ref free_area_init_core_hotplug(int nid);
extern int __add_memory(int nid, u64 start, u64 size, mhp_t mhp_flags);
extern int add_memory(int nid, u64 start, u64 size, mhp_t mhp_flags);
extern int add_memory_resource(int nid, struct resource *resource,
			       mhp_t mhp_flags);
extern int add_memory_driver_managed(int nid, u64 start, u64 size,
				     const char *resource_name,
				     mhp_t mhp_flags);
extern void move_pfn_range_to_zone(struct zone *zone, unsigned long start_pfn,
				   unsigned long nr_pages,
				   struct vmem_altmap *altmap, int migratetype);
extern void remove_pfn_range_from_zone(struct zone *zone,
				       unsigned long start_pfn,
				       unsigned long nr_pages);
extern bool is_memblock_offlined(struct memory_block *mem);
extern int sparse_add_section(int nid, unsigned long pfn,
		unsigned long nr_pages, struct vmem_altmap *altmap);
extern void sparse_remove_section(struct mem_section *ms,
		unsigned long pfn, unsigned long nr_pages,
		unsigned long map_offset, struct vmem_altmap *altmap);
extern struct page *sparse_decode_mem_map(unsigned long coded_mem_map,
					  unsigned long pnum);
extern struct zone *zone_for_pfn_range(int online_type, int nid, unsigned start_pfn,
		unsigned long nr_pages);
extern int arch_create_linear_mapping(int nid, u64 start, u64 size,
				      struct mhp_params *params);
void arch_remove_linear_mapping(u64 start, u64 size);
#endif /* CONFIG_MEMORY_HOTPLUG */

#endif /* __LINUX_MEMORY_HOTPLUG_H */
Commit	Line	Data
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
9f605f26	19	struct page *pfn_to_online_page(unsigned long pfn);
04753278 YG	20
04753278 YG	21	/*
5f24ce5f AA	22	* Types for free bootmem stored in page->lru.next. These have to be in
5f24ce5f AA	23	* some random range in unsigned long space for debugging purposes.
04753278	24	*/
5f24ce5f AA	25	enum {
	26	MEMORY_HOTPLUG_MIN_BOOTMEM_TYPE = 12,
	27	SECTION_INFO = MEMORY_HOTPLUG_MIN_BOOTMEM_TYPE,
	28	MIX_SECTION_INFO,
	29	NODE_INFO,
	30	MEMORY_HOTPLUG_MAX_BOOTMEM_TYPE = NODE_INFO,
	31	};
04753278	32
4f7c6b49	33	/* Types for control the zone type of onlined and offlined memory */
511c2aba	34	enum {
956f8b44	35	/* Offline the memory. */
efc978ad	36	MMOP_OFFLINE = 0,
956f8b44 DH	37	/* Online the memory. Zone depends, see default_zone_for_pfn(). */
	38	MMOP_ONLINE,
	39	/* Online the memory to ZONE_NORMAL. */
4f7c6b49	40	MMOP_ONLINE_KERNEL,
956f8b44	41	/* Online the memory to ZONE_MOVABLE. */
4f7c6b49	42	MMOP_ONLINE_MOVABLE,
511c2aba LJ	43	};
511c2aba LJ	44
b6117199 DH	45	/* Flags for add_memory() and friends to specify memory hotplug details. */
	46	typedef int __bitwise mhp_t;
	47
	48	/* No special request */
	49	#define MHP_NONE ((__force mhp_t)0)
9ca6551e DH	50	/*
	51	* Allow merging of the added System RAM resource with adjacent,
	52	* mergeable resources. After a successful call to add_memory_resource()
	53	* with this flag set, the resource pointer must no longer be used as it
	54	* might be stale, or the resource might have changed.
	55	*/
26011267	56	#define MHP_MERGE_RESOURCE ((__force mhp_t)BIT(0))
b6117199	57
940519f0	58	/*
f5637d3b LG	59	* Extended parameters for memory hotplug:
f5637d3b LG	60	* altmap: alternative allocator for memmap array (optional)
bfeb022f LG	61	* pgprot: page protection flags to apply to newly created page tables
bfeb022f LG	62	* (required)
940519f0	63	*/
f5637d3b	64	struct mhp_params {
940519f0	65	struct vmem_altmap *altmap;
bfeb022f	66	pgprot_t pgprot;
940519f0 MH	67	};
940519f0 MH	68
bca3feaa AK	69	bool mhp_range_allowed(u64 start, u64 size, bool need_mapping);
	70	struct range mhp_get_pluggable_range(bool need_mapping);
	71
bdc8cb98 DH	72	/*
bdc8cb98 DH	73	* Zone resizing functions
511c2aba LJ	74	*
	75	* Note: any attempt to resize a zone should has pgdat_resize_lock()
	76	* zone_span_writelock() both held. This ensure the size of a zone
	77	* can't be changed while pgdat_resize_lock() held.
bdc8cb98 DH	78	*/
	79	static inline unsigned zone_span_seqbegin(struct zone *zone)
	80	{
	81	return read_seqbegin(&zone->span_seqlock);
	82	}
	83	static inline int zone_span_seqretry(struct zone *zone, unsigned iv)
	84	{
	85	return read_seqretry(&zone->span_seqlock, iv);
	86	}
	87	static inline void zone_span_writelock(struct zone *zone)
	88	{
	89	write_seqlock(&zone->span_seqlock);
	90	}
	91	static inline void zone_span_writeunlock(struct zone *zone)
	92	{
	93	write_sequnlock(&zone->span_seqlock);
	94	}
	95	static inline void zone_seqlock_init(struct zone *zone)
	96	{
	97	seqlock_init(&zone->span_seqlock);
	98	}
3947be19 DH	99	extern int zone_grow_free_lists(struct zone *zone, unsigned long new_nr_pages);
	100	extern int zone_grow_waitqueues(struct zone *zone, unsigned long nr_pages);
	101	extern int add_one_highpage(struct page *page, int pfn, int bad_ppro);
3947be19	102	/* VM interface that may be used by firmware interface */
bd5c2344 DH	103	extern int online_pages(unsigned long pfn, unsigned long nr_pages,
bd5c2344 DH	104	int online_type, int nid);
92917998 DH	105	extern struct zone *test_pages_in_a_zone(unsigned long start_pfn,
92917998 DH	106	unsigned long end_pfn);
257bea71 DH	107	extern void __offline_isolated_pages(unsigned long start_pfn,
257bea71 DH	108	unsigned long end_pfn);
48e94196	109
a9cd410a	110	typedef void (online_page_callback_t)(struct page page, unsigned int order);
9d0ad8ca	111
18db1491	112	extern void generic_online_page(struct page *page, unsigned int order);
9d0ad8ca DK	113	extern int set_online_page_callback(online_page_callback_t callback);
	114	extern int restore_online_page_callback(online_page_callback_t callback);
	115
01b0f197 TK	116	extern int try_online_node(int nid);
01b0f197 TK	117
940519f0	118	extern int arch_add_memory(int nid, u64 start, u64 size,
f5637d3b	119	struct mhp_params *params);
357b4da5 JG	120	extern u64 max_mem_size;
357b4da5 JG	121
1adf8b46	122	extern int mhp_online_type_from_str(const char *str);
5f47adf7	123
862919e5	124	/* Default online_type (MMOP_) when new memory blocks are added. /
1adf8b46	125	extern int mhp_default_online_type;
4932381e MH	126	/* If movable_node boot option specified */
	127	extern bool movable_node_enabled;
	128	static inline bool movable_node_is_enabled(void)
	129	{
	130	return movable_node_enabled;
	131	}
31bc3858	132
ac5c9426 DH	133	extern void arch_remove_memory(int nid, u64 start, u64 size,
ac5c9426 DH	134	struct vmem_altmap *altmap);
feee6b29 DH	135	extern void __remove_pages(unsigned long start_pfn, unsigned long nr_pages,
feee6b29 DH	136	struct vmem_altmap *altmap);
49ac8255	137
f1dd2cd1	138	/* reasonably generic interface to expand the physical pages */
24e6d5a5	139	extern int __add_pages(int nid, unsigned long start_pfn, unsigned long nr_pages,
f5637d3b	140	struct mhp_params *params);
bc02af93	141
3072e413 MH	142	#ifndef CONFIG_ARCH_HAS_ADD_PAGES
3072e413 MH	143	static inline int add_pages(int nid, unsigned long start_pfn,
f5637d3b	144	unsigned long nr_pages, struct mhp_params *params)
3072e413	145	{
f5637d3b	146	return __add_pages(nid, start_pfn, nr_pages, params);
3072e413 MH	147	}
3072e413 MH	148	#else /* ARCH_HAS_ADD_PAGES */
24e6d5a5	149	int add_pages(int nid, unsigned long start_pfn, unsigned long nr_pages,
f5637d3b	150	struct mhp_params *params);
3072e413 MH	151	#endif /* ARCH_HAS_ADD_PAGES */
3072e413 MH	152
306d6cbe YG	153	#ifdef CONFIG_HAVE_ARCH_NODEDATA_EXTENSION
	154	/*
	155	* For supporting node-hotadd, we have to allocate a new pgdat.
	156	*
	157	* If an arch has generic style NODE_DATA(),
	158	* node_data[nid] = kzalloc() works well. But it depends on the architecture.
	159	*
	160	* In general, generic_alloc_nodedata() is used.
	161	* Now, arch_free_nodedata() is just defined for error path of node_hot_add.
	162	*
	163	*/
dd0932d9 YG	164	extern pg_data_t *arch_alloc_nodedata(int nid);
dd0932d9 YG	165	extern void arch_free_nodedata(pg_data_t *pgdat);
7049027c	166	extern void arch_refresh_nodedata(int nid, pg_data_t *pgdat);
306d6cbe YG	167
	168	#else /* CONFIG_HAVE_ARCH_NODEDATA_EXTENSION */
	169
	170	#define arch_alloc_nodedata(nid) generic_alloc_nodedata(nid)
	171	#define arch_free_nodedata(pgdat) generic_free_nodedata(pgdat)
	172
	173	#ifdef CONFIG_NUMA
	174	/*
	175	* If ARCH_HAS_NODEDATA_EXTENSION=n, this func is used to allocate pgdat.
	176	* XXX: kmalloc_node() can't work well to get new node's memory at this time.
	177	* Because, pgdat for the new node is not allocated/initialized yet itself.
	178	* To use new node's memory, more consideration will be necessary.
	179	*/
	180	#define generic_alloc_nodedata(nid) \
	181	({ \
	182	kzalloc(sizeof(pg_data_t), GFP_KERNEL); \
	183	})
	184	/*
	185	* This definition is just for error path in node hotadd.
	186	* For node hotremove, we have to replace this.
	187	*/
	188	#define generic_free_nodedata(pgdat) kfree(pgdat)
	189
10ad400b YG	190	extern pg_data_t *node_data[];
	191	static inline void arch_refresh_nodedata(int nid, pg_data_t *pgdat)
	192	{
	193	node_data[nid] = pgdat;
	194	}
	195
306d6cbe YG	196	#else /* !CONFIG_NUMA */
	197
	198	/* never called */
	199	static inline pg_data_t *generic_alloc_nodedata(int nid)
	200	{
	201	BUG();
	202	return NULL;
	203	}
	204	static inline void generic_free_nodedata(pg_data_t *pgdat)
	205	{
	206	}
10ad400b YG	207	static inline void arch_refresh_nodedata(int nid, pg_data_t *pgdat)
	208	{
	209	}
306d6cbe YG	210	#endif /* CONFIG_NUMA */
	211	#endif /* CONFIG_HAVE_ARCH_NODEDATA_EXTENSION */
	212
46723bfa	213	#ifdef CONFIG_HAVE_BOOTMEM_INFO_NODE
7ded384a	214	extern void __init register_page_bootmem_info_node(struct pglist_data *pgdat);
46723bfa	215	#else
04753278 YG	216	static inline void register_page_bootmem_info_node(struct pglist_data *pgdat)
	217	{
	218	}
04753278	219	#endif
46723bfa YI	220	extern void put_page_bootmem(struct page *page);
	221	extern void get_page_bootmem(unsigned long ingo, struct page *page,
	222	unsigned long type);
04753278	223
bfc8c901 VD	224	void get_online_mems(void);
bfc8c901 VD	225	void put_online_mems(void);
20d6c96b	226
30467e0b DR	227	void mem_hotplug_begin(void);
	228	void mem_hotplug_done(void);
	229
208d54e5	230	#else /* ! CONFIG_MEMORY_HOTPLUG */
2d070eab MH	231	#define pfn_to_online_page(pfn) \
	232	({ \
	233	struct page *___page = NULL; \
	234	if (pfn_valid(pfn)) \
	235	___page = pfn_to_page(pfn); \
	236	___page; \
	237	})
	238
bdc8cb98 DH	239	static inline unsigned zone_span_seqbegin(struct zone *zone)
	240	{
	241	return 0;
	242	}
	243	static inline int zone_span_seqretry(struct zone *zone, unsigned iv)
	244	{
	245	return 0;
	246	}
	247	static inline void zone_span_writelock(struct zone *zone) {}
	248	static inline void zone_span_writeunlock(struct zone *zone) {}
	249	static inline void zone_seqlock_init(struct zone *zone) {}
3947be19	250
04753278 YG	251	static inline void register_page_bootmem_info_node(struct pglist_data *pgdat)
	252	{
	253	}
	254
01b0f197 TK	255	static inline int try_online_node(int nid)
	256	{
	257	return 0;
	258	}
	259
bfc8c901 VD	260	static inline void get_online_mems(void) {}
bfc8c901 VD	261	static inline void put_online_mems(void) {}
20d6c96b	262
30467e0b DR	263	static inline void mem_hotplug_begin(void) {}
	264	static inline void mem_hotplug_done(void) {}
	265
4932381e MH	266	static inline bool movable_node_is_enabled(void)
	267	{
	268	return false;
	269	}
bdc8cb98	270	#endif /* ! CONFIG_MEMORY_HOTPLUG */
9d99aaa3	271
bca3feaa AK	272	/*
	273	* Keep this declaration outside CONFIG_MEMORY_HOTPLUG as some
	274	* platforms might override and use arch_get_mappable_range()
	275	* for internal non memory hotplug purposes.
	276	*/
	277	struct range arch_get_mappable_range(void);
	278
3a2d7fa8 PT	279	#if defined(CONFIG_MEMORY_HOTPLUG) \|\| defined(CONFIG_DEFERRED_STRUCT_PAGE_INIT)
	280	/*
	281	* pgdat resizing functions
	282	*/
	283	static inline
	284	void pgdat_resize_lock(struct pglist_data pgdat, unsigned long flags)
	285	{
	286	spin_lock_irqsave(&pgdat->node_size_lock, *flags);
	287	}
	288	static inline
	289	void pgdat_resize_unlock(struct pglist_data pgdat, unsigned long flags)
	290	{
	291	spin_unlock_irqrestore(&pgdat->node_size_lock, *flags);
	292	}
	293	static inline
	294	void pgdat_resize_init(struct pglist_data *pgdat)
	295	{
	296	spin_lock_init(&pgdat->node_size_lock);
	297	}
	298	#else /* !(CONFIG_MEMORY_HOTPLUG \|\| CONFIG_DEFERRED_STRUCT_PAGE_INIT) */
	299	/*
	300	* Stub functions for when hotplug is off
	301	*/
	302	static inline void pgdat_resize_lock(struct pglist_data p, unsigned long f) {}
	303	static inline void pgdat_resize_unlock(struct pglist_data p, unsigned long f) {}
	304	static inline void pgdat_resize_init(struct pglist_data *pgdat) {}
	305	#endif /* !(CONFIG_MEMORY_HOTPLUG \|\| CONFIG_DEFERRED_STRUCT_PAGE_INIT) */
	306
5c755e9f BP	307	#ifdef CONFIG_MEMORY_HOTREMOVE
5c755e9f BP	308
90b30cdc	309	extern void try_offline_node(int nid);
aba6efc4	310	extern int offline_pages(unsigned long start_pfn, unsigned long nr_pages);
eca499ab	311	extern int remove_memory(int nid, u64 start, u64 size);
d15e5926	312	extern void __remove_memory(int nid, u64 start, u64 size);
08b3acd7	313	extern int offline_and_remove_memory(int nid, u64 start, u64 size);
5c755e9f BP	314
5c755e9f BP	315	#else
90b30cdc	316	static inline void try_offline_node(int nid) {}
aba6efc4 RW	317
	318	static inline int offline_pages(unsigned long start_pfn, unsigned long nr_pages)
	319	{
	320	return -EINVAL;
	321	}
	322
eca499ab PT	323	static inline int remove_memory(int nid, u64 start, u64 size)
	324	{
	325	return -EBUSY;
	326	}
	327
d15e5926	328	static inline void __remove_memory(int nid, u64 start, u64 size) {}
5c755e9f BP	329	#endif /* CONFIG_MEMORY_HOTREMOVE */
5c755e9f BP	330
aba9817d BDC	331	extern void set_zone_contiguous(struct zone *zone);
	332	extern void clear_zone_contiguous(struct zone *zone);
	333
3a0aaefe	334	#ifdef CONFIG_MEMORY_HOTPLUG
03e85f9d	335	extern void __ref free_area_init_core_hotplug(int nid);
b6117199 DH	336	extern int __add_memory(int nid, u64 start, u64 size, mhp_t mhp_flags);
	337	extern int add_memory(int nid, u64 start, u64 size, mhp_t mhp_flags);
	338	extern int add_memory_resource(int nid, struct resource *resource,
	339	mhp_t mhp_flags);
7b7b2721	340	extern int add_memory_driver_managed(int nid, u64 start, u64 size,
b6117199 DH	341	const char *resource_name,
b6117199 DH	342	mhp_t mhp_flags);
f1dd2cd1	343	extern void move_pfn_range_to_zone(struct zone *zone, unsigned long start_pfn,
d882c006 DH	344	unsigned long nr_pages,
d882c006 DH	345	struct vmem_altmap *altmap, int migratetype);
feee6b29 DH	346	extern void remove_pfn_range_from_zone(struct zone *zone,
	347	unsigned long start_pfn,
	348	unsigned long nr_pages);
6677e3ea	349	extern bool is_memblock_offlined(struct memory_block *mem);
7ea62160 DW	350	extern int sparse_add_section(int nid, unsigned long pfn,
7ea62160 DW	351	unsigned long nr_pages, struct vmem_altmap *altmap);
ba72b4c8	352	extern void sparse_remove_section(struct mem_section *ms,
7ea62160	353	unsigned long pfn, unsigned long nr_pages,
24b6d416	354	unsigned long map_offset, struct vmem_altmap *altmap);
04753278 YG	355	extern struct page *sparse_decode_mem_map(unsigned long coded_mem_map,
04753278 YG	356	unsigned long pnum);
e5e68930	357	extern struct zone *zone_for_pfn_range(int online_type, int nid, unsigned start_pfn,
c246a213	358	unsigned long nr_pages);
4abb1e5b DH	359	extern int arch_create_linear_mapping(int nid, u64 start, u64 size,
	360	struct mhp_params *params);
	361	void arch_remove_linear_mapping(u64 start, u64 size);
3a0aaefe DH	362	#endif /* CONFIG_MEMORY_HOTPLUG */
3a0aaefe DH	363
208d54e5	364	#endif /* __LINUX_MEMORY_HOTPLUG_H */