365 lines
11 KiB
C
365 lines
11 KiB
C
|
/* 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_group;
|
||
|
|
struct resource;
|
||
|
|
struct vmem_altmap;
|
||
|
|
struct dev_pagemap;
|
||
|
|
|
||
|
|
#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.
|
||
|
|
*
|
||
|
|
*/
|
||
|
|
extern pg_data_t *arch_alloc_nodedata(int nid);
|
||
|
|
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)
|
||
|
|
|
||
|
|
#ifdef CONFIG_NUMA
|
||
|
|
/*
|
||
|
|
* XXX: node aware allocation 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) \
|
||
|
|
({ \
|
||
|
|
memblock_alloc(sizeof(*pgdat), SMP_CACHE_BYTES); \
|
||
|
|
})
|
||
|
|
|
||
|
|
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 arch_refresh_nodedata(int nid, pg_data_t *pgdat)
|
||
|
|
{
|
||
|
|
}
|
||
|
|
#endif /* CONFIG_NUMA */
|
||
|
|
#endif /* CONFIG_HAVE_ARCH_NODEDATA_EXTENSION */
|
||
|
|
|
||
|
|
#ifdef CONFIG_MEMORY_HOTPLUG
|
||
|
|
struct page *pfn_to_online_page(unsigned long pfn);
|
||
|
|
|
||
|
|
/* 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))
|
||
|
|
|
||
|
|
/*
|
||
|
|
* We want memmap (struct page array) to be self contained.
|
||
|
|
* To do so, we will use the beginning of the hot-added range to build
|
||
|
|
* the page tables for the memmap array that describes the entire range.
|
||
|
|
* Only selected architectures support it with SPARSE_VMEMMAP.
|
||
|
|
*/
|
||
|
|
#define MHP_MEMMAP_ON_MEMORY ((__force mhp_t)BIT(1))
|
||
|
|
/*
|
||
|
|
* The nid field specifies a memory group id (mgid) instead. The memory group
|
||
|
|
* implies the node id (nid).
|
||
|
|
*/
|
||
|
|
#define MHP_NID_IS_MGID ((__force mhp_t)BIT(2))
|
||
|
|
|
||
|
|
/*
|
||
|
|
* 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;
|
||
|
|
struct dev_pagemap *pgmap;
|
||
|
|
};
|
||
|
|
|
||
|
|
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 void adjust_present_page_count(struct page *page,
|
||
|
|
struct memory_group *group,
|
||
|
|
long nr_pages);
|
||
|
|
/* VM interface that may be used by firmware interface */
|
||
|
|
extern int mhp_init_memmap_on_memory(unsigned long pfn, unsigned long nr_pages,
|
||
|
|
struct zone *zone);
|
||
|
|
extern void mhp_deinit_memmap_on_memory(unsigned long pfn, unsigned long nr_pages);
|
||
|
|
extern int online_pages(unsigned long pfn, unsigned long nr_pages,
|
||
|
|
struct zone *zone, struct memory_group *group);
|
||
|
|
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(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 */
|
||
|
|
|
||
|
|
void get_online_mems(void);
|
||
|
|
void put_online_mems(void);
|
||
|
|
|
||
|
|
void mem_hotplug_begin(void);
|
||
|
|
void mem_hotplug_done(void);
|
||
|
|
|
||
|
|
/* See kswapd_is_running() */
|
||
|
|
static inline void pgdat_kswapd_lock(pg_data_t *pgdat)
|
||
|
|
{
|
||
|
|
mutex_lock(&pgdat->kswapd_lock);
|
||
|
|
}
|
||
|
|
|
||
|
|
static inline void pgdat_kswapd_unlock(pg_data_t *pgdat)
|
||
|
|
{
|
||
|
|
mutex_unlock(&pgdat->kswapd_lock);
|
||
|
|
}
|
||
|
|
|
||
|
|
static inline void pgdat_kswapd_lock_init(pg_data_t *pgdat)
|
||
|
|
{
|
||
|
|
mutex_init(&pgdat->kswapd_lock);
|
||
|
|
}
|
||
|
|
|
||
|
|
#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 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;
|
||
|
|
}
|
||
|
|
|
||
|
|
static inline void pgdat_kswapd_lock(pg_data_t *pgdat) {}
|
||
|
|
static inline void pgdat_kswapd_unlock(pg_data_t *pgdat) {}
|
||
|
|
static inline void pgdat_kswapd_lock_init(pg_data_t *pgdat) {}
|
||
|
|
#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,
|
||
|
|
struct zone *zone, struct memory_group *group);
|
||
|
|
extern int remove_memory(u64 start, u64 size);
|
||
|
|
extern void __remove_memory(u64 start, u64 size);
|
||
|
|
extern int offline_and_remove_memory(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,
|
||
|
|
struct zone *zone, struct memory_group *group)
|
||
|
|
{
|
||
|
|
return -EINVAL;
|
||
|
|
}
|
||
|
|
|
||
|
|
static inline int remove_memory(u64 start, u64 size)
|
||
|
|
{
|
||
|
|
return -EBUSY;
|
||
|
|
}
|
||
|
|
|
||
|
|
static inline void __remove_memory(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(struct pglist_data *pgdat);
|
||
|
|
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 int sparse_add_section(int nid, unsigned long pfn,
|
||
|
|
unsigned long nr_pages, struct vmem_altmap *altmap,
|
||
|
|
struct dev_pagemap *pgmap);
|
||
|
|
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,
|
||
|
|
struct memory_group *group, unsigned long 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);
|
||
|
|
extern bool mhp_supports_memmap_on_memory(unsigned long size);
|
||
|
|
#endif /* CONFIG_MEMORY_HOTPLUG */
|
||
|
|
|
||
|
|
#endif /* __LINUX_MEMORY_HOTPLUG_H */
|