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- #ifndef _LINUX_HUGETLB_H
- #define _LINUX_HUGETLB_H
- #include <linux/mm_types.h>
- #include <linux/mmdebug.h>
- #include <linux/fs.h>
- #include <linux/hugetlb_inline.h>
- #include <linux/cgroup.h>
- #include <linux/page_ref.h>
- #include <linux/list.h>
- #include <linux/kref.h>
- #include <linux/pgtable.h>
- #include <linux/gfp.h>
- #include <linux/userfaultfd_k.h>
- struct ctl_table;
- struct user_struct;
- struct mmu_gather;
- struct node;
- #ifndef CONFIG_ARCH_HAS_HUGEPD
- typedef struct { unsigned long pd; } hugepd_t;
- #define is_hugepd(hugepd) (0)
- #define __hugepd(x) ((hugepd_t) { (x) })
- #endif
- #ifdef CONFIG_HUGETLB_PAGE
- #include <linux/mempolicy.h>
- #include <linux/shm.h>
- #include <asm/tlbflush.h>
- enum {
- SUBPAGE_INDEX_SUBPOOL = 1,
- #ifdef CONFIG_CGROUP_HUGETLB
- SUBPAGE_INDEX_CGROUP,
- SUBPAGE_INDEX_CGROUP_RSVD,
- __MAX_CGROUP_SUBPAGE_INDEX = SUBPAGE_INDEX_CGROUP_RSVD,
- #endif
- #ifdef CONFIG_MEMORY_FAILURE
- SUBPAGE_INDEX_HWPOISON,
- #endif
- __NR_USED_SUBPAGE,
- };
- struct hugepage_subpool {
- spinlock_t lock;
- long count;
- long max_hpages;
- long used_hpages;
-
- struct hstate *hstate;
- long min_hpages;
- long rsv_hpages;
-
- };
- struct resv_map {
- struct kref refs;
- spinlock_t lock;
- struct list_head regions;
- long adds_in_progress;
- struct list_head region_cache;
- long region_cache_count;
- struct rw_semaphore rw_sema;
- #ifdef CONFIG_CGROUP_HUGETLB
-
- struct page_counter *reservation_counter;
- unsigned long pages_per_hpage;
- struct cgroup_subsys_state *css;
- #endif
- };
- struct file_region {
- struct list_head link;
- long from;
- long to;
- #ifdef CONFIG_CGROUP_HUGETLB
-
- struct page_counter *reservation_counter;
- struct cgroup_subsys_state *css;
- #endif
- };
- struct hugetlb_vma_lock {
- struct kref refs;
- struct rw_semaphore rw_sema;
- struct vm_area_struct *vma;
- };
- extern struct resv_map *resv_map_alloc(void);
- void resv_map_release(struct kref *ref);
- extern spinlock_t hugetlb_lock;
- extern int hugetlb_max_hstate __read_mostly;
- #define for_each_hstate(h) \
- for ((h) = hstates; (h) < &hstates[hugetlb_max_hstate]; (h)++)
- struct hugepage_subpool *hugepage_new_subpool(struct hstate *h, long max_hpages,
- long min_hpages);
- void hugepage_put_subpool(struct hugepage_subpool *spool);
- void hugetlb_dup_vma_private(struct vm_area_struct *vma);
- void clear_vma_resv_huge_pages(struct vm_area_struct *vma);
- int hugetlb_sysctl_handler(struct ctl_table *, int, void *, size_t *, loff_t *);
- int hugetlb_overcommit_handler(struct ctl_table *, int, void *, size_t *,
- loff_t *);
- int hugetlb_treat_movable_handler(struct ctl_table *, int, void *, size_t *,
- loff_t *);
- int hugetlb_mempolicy_sysctl_handler(struct ctl_table *, int, void *, size_t *,
- loff_t *);
- int move_hugetlb_page_tables(struct vm_area_struct *vma,
- struct vm_area_struct *new_vma,
- unsigned long old_addr, unsigned long new_addr,
- unsigned long len);
- int copy_hugetlb_page_range(struct mm_struct *, struct mm_struct *,
- struct vm_area_struct *, struct vm_area_struct *);
- long follow_hugetlb_page(struct mm_struct *, struct vm_area_struct *,
- struct page **, struct vm_area_struct **,
- unsigned long *, unsigned long *, long, unsigned int,
- int *);
- void unmap_hugepage_range(struct vm_area_struct *,
- unsigned long, unsigned long, struct page *,
- zap_flags_t);
- void __unmap_hugepage_range_final(struct mmu_gather *tlb,
- struct vm_area_struct *vma,
- unsigned long start, unsigned long end,
- struct page *ref_page, zap_flags_t zap_flags);
- void hugetlb_report_meminfo(struct seq_file *);
- int hugetlb_report_node_meminfo(char *buf, int len, int nid);
- void hugetlb_show_meminfo_node(int nid);
- unsigned long hugetlb_total_pages(void);
- vm_fault_t hugetlb_fault(struct mm_struct *mm, struct vm_area_struct *vma,
- unsigned long address, unsigned int flags);
- #ifdef CONFIG_USERFAULTFD
- int hugetlb_mcopy_atomic_pte(struct mm_struct *dst_mm, pte_t *dst_pte,
- struct vm_area_struct *dst_vma,
- unsigned long dst_addr,
- unsigned long src_addr,
- enum mcopy_atomic_mode mode,
- struct page **pagep,
- bool wp_copy);
- #endif
- bool hugetlb_reserve_pages(struct inode *inode, long from, long to,
- struct vm_area_struct *vma,
- vm_flags_t vm_flags);
- long hugetlb_unreserve_pages(struct inode *inode, long start, long end,
- long freed);
- int isolate_hugetlb(struct page *page, struct list_head *list);
- int get_hwpoison_huge_page(struct page *page, bool *hugetlb);
- int get_huge_page_for_hwpoison(unsigned long pfn, int flags);
- void putback_active_hugepage(struct page *page);
- void move_hugetlb_state(struct page *oldpage, struct page *newpage, int reason);
- void free_huge_page(struct page *page);
- void hugetlb_fix_reserve_counts(struct inode *inode);
- extern struct mutex *hugetlb_fault_mutex_table;
- u32 hugetlb_fault_mutex_hash(struct address_space *mapping, pgoff_t idx);
- pte_t *huge_pmd_share(struct mm_struct *mm, struct vm_area_struct *vma,
- unsigned long addr, pud_t *pud);
- struct address_space *hugetlb_page_mapping_lock_write(struct page *hpage);
- extern int sysctl_hugetlb_shm_group;
- extern struct list_head huge_boot_pages;
- pte_t *huge_pte_alloc(struct mm_struct *mm, struct vm_area_struct *vma,
- unsigned long addr, unsigned long sz);
- pte_t *huge_pte_offset(struct mm_struct *mm,
- unsigned long addr, unsigned long sz);
- unsigned long hugetlb_mask_last_page(struct hstate *h);
- int huge_pmd_unshare(struct mm_struct *mm, struct vm_area_struct *vma,
- unsigned long addr, pte_t *ptep);
- void adjust_range_if_pmd_sharing_possible(struct vm_area_struct *vma,
- unsigned long *start, unsigned long *end);
- struct page *follow_huge_addr(struct mm_struct *mm, unsigned long address,
- int write);
- struct page *follow_huge_pd(struct vm_area_struct *vma,
- unsigned long address, hugepd_t hpd,
- int flags, int pdshift);
- struct page *follow_huge_pmd_pte(struct vm_area_struct *vma, unsigned long address,
- int flags);
- struct page *follow_huge_pud(struct mm_struct *mm, unsigned long address,
- pud_t *pud, int flags);
- struct page *follow_huge_pgd(struct mm_struct *mm, unsigned long address,
- pgd_t *pgd, int flags);
- void hugetlb_vma_lock_read(struct vm_area_struct *vma);
- void hugetlb_vma_unlock_read(struct vm_area_struct *vma);
- void hugetlb_vma_lock_write(struct vm_area_struct *vma);
- void hugetlb_vma_unlock_write(struct vm_area_struct *vma);
- int hugetlb_vma_trylock_write(struct vm_area_struct *vma);
- void hugetlb_vma_assert_locked(struct vm_area_struct *vma);
- void hugetlb_vma_lock_release(struct kref *kref);
- int pmd_huge(pmd_t pmd);
- int pud_huge(pud_t pud);
- unsigned long hugetlb_change_protection(struct vm_area_struct *vma,
- unsigned long address, unsigned long end, pgprot_t newprot,
- unsigned long cp_flags);
- bool is_hugetlb_entry_migration(pte_t pte);
- void hugetlb_unshare_all_pmds(struct vm_area_struct *vma);
- #else
- static inline void hugetlb_dup_vma_private(struct vm_area_struct *vma)
- {
- }
- static inline void clear_vma_resv_huge_pages(struct vm_area_struct *vma)
- {
- }
- static inline unsigned long hugetlb_total_pages(void)
- {
- return 0;
- }
- static inline struct address_space *hugetlb_page_mapping_lock_write(
- struct page *hpage)
- {
- return NULL;
- }
- static inline int huge_pmd_unshare(struct mm_struct *mm,
- struct vm_area_struct *vma,
- unsigned long addr, pte_t *ptep)
- {
- return 0;
- }
- static inline void adjust_range_if_pmd_sharing_possible(
- struct vm_area_struct *vma,
- unsigned long *start, unsigned long *end)
- {
- }
- static inline long follow_hugetlb_page(struct mm_struct *mm,
- struct vm_area_struct *vma, struct page **pages,
- struct vm_area_struct **vmas, unsigned long *position,
- unsigned long *nr_pages, long i, unsigned int flags,
- int *nonblocking)
- {
- BUG();
- return 0;
- }
- static inline struct page *follow_huge_addr(struct mm_struct *mm,
- unsigned long address, int write)
- {
- return ERR_PTR(-EINVAL);
- }
- static inline int copy_hugetlb_page_range(struct mm_struct *dst,
- struct mm_struct *src,
- struct vm_area_struct *dst_vma,
- struct vm_area_struct *src_vma)
- {
- BUG();
- return 0;
- }
- static inline int move_hugetlb_page_tables(struct vm_area_struct *vma,
- struct vm_area_struct *new_vma,
- unsigned long old_addr,
- unsigned long new_addr,
- unsigned long len)
- {
- BUG();
- return 0;
- }
- static inline void hugetlb_report_meminfo(struct seq_file *m)
- {
- }
- static inline int hugetlb_report_node_meminfo(char *buf, int len, int nid)
- {
- return 0;
- }
- static inline void hugetlb_show_meminfo_node(int nid)
- {
- }
- static inline struct page *follow_huge_pd(struct vm_area_struct *vma,
- unsigned long address, hugepd_t hpd, int flags,
- int pdshift)
- {
- return NULL;
- }
- static inline struct page *follow_huge_pmd_pte(struct vm_area_struct *vma,
- unsigned long address, int flags)
- {
- return NULL;
- }
- static inline struct page *follow_huge_pud(struct mm_struct *mm,
- unsigned long address, pud_t *pud, int flags)
- {
- return NULL;
- }
- static inline struct page *follow_huge_pgd(struct mm_struct *mm,
- unsigned long address, pgd_t *pgd, int flags)
- {
- return NULL;
- }
- static inline int prepare_hugepage_range(struct file *file,
- unsigned long addr, unsigned long len)
- {
- return -EINVAL;
- }
- static inline void hugetlb_vma_lock_read(struct vm_area_struct *vma)
- {
- }
- static inline void hugetlb_vma_unlock_read(struct vm_area_struct *vma)
- {
- }
- static inline void hugetlb_vma_lock_write(struct vm_area_struct *vma)
- {
- }
- static inline void hugetlb_vma_unlock_write(struct vm_area_struct *vma)
- {
- }
- static inline int hugetlb_vma_trylock_write(struct vm_area_struct *vma)
- {
- return 1;
- }
- static inline void hugetlb_vma_assert_locked(struct vm_area_struct *vma)
- {
- }
- static inline int pmd_huge(pmd_t pmd)
- {
- return 0;
- }
- static inline int pud_huge(pud_t pud)
- {
- return 0;
- }
- static inline int is_hugepage_only_range(struct mm_struct *mm,
- unsigned long addr, unsigned long len)
- {
- return 0;
- }
- static inline void hugetlb_free_pgd_range(struct mmu_gather *tlb,
- unsigned long addr, unsigned long end,
- unsigned long floor, unsigned long ceiling)
- {
- BUG();
- }
- #ifdef CONFIG_USERFAULTFD
- static inline int hugetlb_mcopy_atomic_pte(struct mm_struct *dst_mm,
- pte_t *dst_pte,
- struct vm_area_struct *dst_vma,
- unsigned long dst_addr,
- unsigned long src_addr,
- enum mcopy_atomic_mode mode,
- struct page **pagep,
- bool wp_copy)
- {
- BUG();
- return 0;
- }
- #endif
- static inline pte_t *huge_pte_offset(struct mm_struct *mm, unsigned long addr,
- unsigned long sz)
- {
- return NULL;
- }
- static inline int isolate_hugetlb(struct page *page, struct list_head *list)
- {
- return -EBUSY;
- }
- static inline int get_hwpoison_huge_page(struct page *page, bool *hugetlb)
- {
- return 0;
- }
- static inline int get_huge_page_for_hwpoison(unsigned long pfn, int flags)
- {
- return 0;
- }
- static inline void putback_active_hugepage(struct page *page)
- {
- }
- static inline void move_hugetlb_state(struct page *oldpage,
- struct page *newpage, int reason)
- {
- }
- static inline unsigned long hugetlb_change_protection(
- struct vm_area_struct *vma, unsigned long address,
- unsigned long end, pgprot_t newprot,
- unsigned long cp_flags)
- {
- return 0;
- }
- static inline void __unmap_hugepage_range_final(struct mmu_gather *tlb,
- struct vm_area_struct *vma, unsigned long start,
- unsigned long end, struct page *ref_page,
- zap_flags_t zap_flags)
- {
- BUG();
- }
- static inline vm_fault_t hugetlb_fault(struct mm_struct *mm,
- struct vm_area_struct *vma, unsigned long address,
- unsigned int flags)
- {
- BUG();
- return 0;
- }
- static inline void hugetlb_unshare_all_pmds(struct vm_area_struct *vma) { }
- #endif
- #ifndef pgd_huge
- #define pgd_huge(x) 0
- #endif
- #ifndef p4d_huge
- #define p4d_huge(x) 0
- #endif
- #ifndef pgd_write
- static inline int pgd_write(pgd_t pgd)
- {
- BUG();
- return 0;
- }
- #endif
- #define HUGETLB_ANON_FILE "anon_hugepage"
- enum {
-
- HUGETLB_SHMFS_INODE = 1,
-
- HUGETLB_ANONHUGE_INODE = 2,
- };
- #ifdef CONFIG_HUGETLBFS
- struct hugetlbfs_sb_info {
- long max_inodes;
- long free_inodes;
- spinlock_t stat_lock;
- struct hstate *hstate;
- struct hugepage_subpool *spool;
- kuid_t uid;
- kgid_t gid;
- umode_t mode;
- };
- static inline struct hugetlbfs_sb_info *HUGETLBFS_SB(struct super_block *sb)
- {
- return sb->s_fs_info;
- }
- struct hugetlbfs_inode_info {
- struct shared_policy policy;
- struct inode vfs_inode;
- unsigned int seals;
- };
- static inline struct hugetlbfs_inode_info *HUGETLBFS_I(struct inode *inode)
- {
- return container_of(inode, struct hugetlbfs_inode_info, vfs_inode);
- }
- extern const struct file_operations hugetlbfs_file_operations;
- extern const struct vm_operations_struct hugetlb_vm_ops;
- struct file *hugetlb_file_setup(const char *name, size_t size, vm_flags_t acct,
- int creat_flags, int page_size_log);
- static inline bool is_file_hugepages(struct file *file)
- {
- if (file->f_op == &hugetlbfs_file_operations)
- return true;
- return is_file_shm_hugepages(file);
- }
- static inline struct hstate *hstate_inode(struct inode *i)
- {
- return HUGETLBFS_SB(i->i_sb)->hstate;
- }
- #else
- #define is_file_hugepages(file) false
- static inline struct file *
- hugetlb_file_setup(const char *name, size_t size, vm_flags_t acctflag,
- int creat_flags, int page_size_log)
- {
- return ERR_PTR(-ENOSYS);
- }
- static inline struct hstate *hstate_inode(struct inode *i)
- {
- return NULL;
- }
- #endif
- #ifdef HAVE_ARCH_HUGETLB_UNMAPPED_AREA
- unsigned long hugetlb_get_unmapped_area(struct file *file, unsigned long addr,
- unsigned long len, unsigned long pgoff,
- unsigned long flags);
- #endif
- unsigned long
- generic_hugetlb_get_unmapped_area(struct file *file, unsigned long addr,
- unsigned long len, unsigned long pgoff,
- unsigned long flags);
- enum hugetlb_page_flags {
- HPG_restore_reserve = 0,
- HPG_migratable,
- HPG_temporary,
- HPG_freed,
- HPG_vmemmap_optimized,
- HPG_raw_hwp_unreliable,
- __NR_HPAGEFLAGS,
- };
- #ifdef CONFIG_HUGETLB_PAGE
- #define TESTHPAGEFLAG(uname, flname) \
- static inline int HPage##uname(struct page *page) \
- { return test_bit(HPG_##flname, &(page->private)); }
- #define SETHPAGEFLAG(uname, flname) \
- static inline void SetHPage##uname(struct page *page) \
- { set_bit(HPG_##flname, &(page->private)); }
- #define CLEARHPAGEFLAG(uname, flname) \
- static inline void ClearHPage##uname(struct page *page) \
- { clear_bit(HPG_##flname, &(page->private)); }
- #else
- #define TESTHPAGEFLAG(uname, flname) \
- static inline int HPage##uname(struct page *page) \
- { return 0; }
- #define SETHPAGEFLAG(uname, flname) \
- static inline void SetHPage##uname(struct page *page) \
- { }
- #define CLEARHPAGEFLAG(uname, flname) \
- static inline void ClearHPage##uname(struct page *page) \
- { }
- #endif
- #define HPAGEFLAG(uname, flname) \
- TESTHPAGEFLAG(uname, flname) \
- SETHPAGEFLAG(uname, flname) \
- CLEARHPAGEFLAG(uname, flname) \
- HPAGEFLAG(RestoreReserve, restore_reserve)
- HPAGEFLAG(Migratable, migratable)
- HPAGEFLAG(Temporary, temporary)
- HPAGEFLAG(Freed, freed)
- HPAGEFLAG(VmemmapOptimized, vmemmap_optimized)
- HPAGEFLAG(RawHwpUnreliable, raw_hwp_unreliable)
- #ifdef CONFIG_HUGETLB_PAGE
- #define HSTATE_NAME_LEN 32
- struct hstate {
- struct mutex resize_lock;
- int next_nid_to_alloc;
- int next_nid_to_free;
- unsigned int order;
- unsigned int demote_order;
- unsigned long mask;
- unsigned long max_huge_pages;
- unsigned long nr_huge_pages;
- unsigned long free_huge_pages;
- unsigned long resv_huge_pages;
- unsigned long surplus_huge_pages;
- unsigned long nr_overcommit_huge_pages;
- struct list_head hugepage_activelist;
- struct list_head hugepage_freelists[MAX_NUMNODES];
- unsigned int max_huge_pages_node[MAX_NUMNODES];
- unsigned int nr_huge_pages_node[MAX_NUMNODES];
- unsigned int free_huge_pages_node[MAX_NUMNODES];
- unsigned int surplus_huge_pages_node[MAX_NUMNODES];
- #ifdef CONFIG_CGROUP_HUGETLB
-
- struct cftype cgroup_files_dfl[8];
- struct cftype cgroup_files_legacy[10];
- #endif
- char name[HSTATE_NAME_LEN];
- };
- struct huge_bootmem_page {
- struct list_head list;
- struct hstate *hstate;
- };
- int isolate_or_dissolve_huge_page(struct page *page, struct list_head *list);
- struct page *alloc_huge_page(struct vm_area_struct *vma,
- unsigned long addr, int avoid_reserve);
- struct page *alloc_huge_page_nodemask(struct hstate *h, int preferred_nid,
- nodemask_t *nmask, gfp_t gfp_mask);
- struct page *alloc_huge_page_vma(struct hstate *h, struct vm_area_struct *vma,
- unsigned long address);
- int hugetlb_add_to_page_cache(struct page *page, struct address_space *mapping,
- pgoff_t idx);
- void restore_reserve_on_error(struct hstate *h, struct vm_area_struct *vma,
- unsigned long address, struct page *page);
- int __init __alloc_bootmem_huge_page(struct hstate *h, int nid);
- int __init alloc_bootmem_huge_page(struct hstate *h, int nid);
- bool __init hugetlb_node_alloc_supported(void);
- void __init hugetlb_add_hstate(unsigned order);
- bool __init arch_hugetlb_valid_size(unsigned long size);
- struct hstate *size_to_hstate(unsigned long size);
- #ifndef HUGE_MAX_HSTATE
- #define HUGE_MAX_HSTATE 1
- #endif
- extern struct hstate hstates[HUGE_MAX_HSTATE];
- extern unsigned int default_hstate_idx;
- #define default_hstate (hstates[default_hstate_idx])
- static inline struct hugepage_subpool *hugetlb_page_subpool(struct page *hpage)
- {
- return (void *)page_private(hpage + SUBPAGE_INDEX_SUBPOOL);
- }
- static inline void hugetlb_set_page_subpool(struct page *hpage,
- struct hugepage_subpool *subpool)
- {
- set_page_private(hpage + SUBPAGE_INDEX_SUBPOOL, (unsigned long)subpool);
- }
- static inline struct hstate *hstate_file(struct file *f)
- {
- return hstate_inode(file_inode(f));
- }
- static inline struct hstate *hstate_sizelog(int page_size_log)
- {
- if (!page_size_log)
- return &default_hstate;
- if (page_size_log < BITS_PER_LONG)
- return size_to_hstate(1UL << page_size_log);
- return NULL;
- }
- static inline struct hstate *hstate_vma(struct vm_area_struct *vma)
- {
- return hstate_file(vma->vm_file);
- }
- static inline unsigned long huge_page_size(const struct hstate *h)
- {
- return (unsigned long)PAGE_SIZE << h->order;
- }
- extern unsigned long vma_kernel_pagesize(struct vm_area_struct *vma);
- extern unsigned long vma_mmu_pagesize(struct vm_area_struct *vma);
- static inline unsigned long huge_page_mask(struct hstate *h)
- {
- return h->mask;
- }
- static inline unsigned int huge_page_order(struct hstate *h)
- {
- return h->order;
- }
- static inline unsigned huge_page_shift(struct hstate *h)
- {
- return h->order + PAGE_SHIFT;
- }
- static inline bool hstate_is_gigantic(struct hstate *h)
- {
- return huge_page_order(h) >= MAX_ORDER;
- }
- static inline unsigned int pages_per_huge_page(const struct hstate *h)
- {
- return 1 << h->order;
- }
- static inline unsigned int blocks_per_huge_page(struct hstate *h)
- {
- return huge_page_size(h) / 512;
- }
- #include <asm/hugetlb.h>
- #ifndef is_hugepage_only_range
- static inline int is_hugepage_only_range(struct mm_struct *mm,
- unsigned long addr, unsigned long len)
- {
- return 0;
- }
- #define is_hugepage_only_range is_hugepage_only_range
- #endif
- #ifndef arch_clear_hugepage_flags
- static inline void arch_clear_hugepage_flags(struct page *page) { }
- #define arch_clear_hugepage_flags arch_clear_hugepage_flags
- #endif
- #ifndef arch_make_huge_pte
- static inline pte_t arch_make_huge_pte(pte_t entry, unsigned int shift,
- vm_flags_t flags)
- {
- return pte_mkhuge(entry);
- }
- #endif
- static inline struct hstate *page_hstate(struct page *page)
- {
- VM_BUG_ON_PAGE(!PageHuge(page), page);
- return size_to_hstate(page_size(page));
- }
- static inline unsigned hstate_index_to_shift(unsigned index)
- {
- return hstates[index].order + PAGE_SHIFT;
- }
- static inline int hstate_index(struct hstate *h)
- {
- return h - hstates;
- }
- extern int dissolve_free_huge_page(struct page *page);
- extern int dissolve_free_huge_pages(unsigned long start_pfn,
- unsigned long end_pfn);
- #ifdef CONFIG_MEMORY_FAILURE
- extern void hugetlb_clear_page_hwpoison(struct page *hpage);
- #else
- static inline void hugetlb_clear_page_hwpoison(struct page *hpage)
- {
- }
- #endif
- #ifdef CONFIG_ARCH_ENABLE_HUGEPAGE_MIGRATION
- #ifndef arch_hugetlb_migration_supported
- static inline bool arch_hugetlb_migration_supported(struct hstate *h)
- {
- if ((huge_page_shift(h) == PMD_SHIFT) ||
- (huge_page_shift(h) == PUD_SHIFT) ||
- (huge_page_shift(h) == PGDIR_SHIFT))
- return true;
- else
- return false;
- }
- #endif
- #else
- static inline bool arch_hugetlb_migration_supported(struct hstate *h)
- {
- return false;
- }
- #endif
- static inline bool hugepage_migration_supported(struct hstate *h)
- {
- return arch_hugetlb_migration_supported(h);
- }
- bool __vma_private_lock(struct vm_area_struct *vma);
- static inline bool hugepage_movable_supported(struct hstate *h)
- {
- if (!hugepage_migration_supported(h))
- return false;
- if (hstate_is_gigantic(h))
- return false;
- return true;
- }
- static inline gfp_t htlb_alloc_mask(struct hstate *h)
- {
- if (hugepage_movable_supported(h))
- return GFP_HIGHUSER_MOVABLE;
- else
- return GFP_HIGHUSER;
- }
- static inline gfp_t htlb_modify_alloc_mask(struct hstate *h, gfp_t gfp_mask)
- {
- gfp_t modified_mask = htlb_alloc_mask(h);
-
- modified_mask |= (gfp_mask & __GFP_THISNODE);
- modified_mask |= (gfp_mask & __GFP_NOWARN);
- return modified_mask;
- }
- static inline spinlock_t *huge_pte_lockptr(struct hstate *h,
- struct mm_struct *mm, pte_t *pte)
- {
- if (huge_page_size(h) == PMD_SIZE)
- return pmd_lockptr(mm, (pmd_t *) pte);
- VM_BUG_ON(huge_page_size(h) == PAGE_SIZE);
- return &mm->page_table_lock;
- }
- #ifndef hugepages_supported
- #define hugepages_supported() (HPAGE_SHIFT != 0)
- #endif
- void hugetlb_report_usage(struct seq_file *m, struct mm_struct *mm);
- static inline void hugetlb_count_init(struct mm_struct *mm)
- {
- atomic_long_set(&mm->hugetlb_usage, 0);
- }
- static inline void hugetlb_count_add(long l, struct mm_struct *mm)
- {
- atomic_long_add(l, &mm->hugetlb_usage);
- }
- static inline void hugetlb_count_sub(long l, struct mm_struct *mm)
- {
- atomic_long_sub(l, &mm->hugetlb_usage);
- }
- #ifndef huge_ptep_modify_prot_start
- #define huge_ptep_modify_prot_start huge_ptep_modify_prot_start
- static inline pte_t huge_ptep_modify_prot_start(struct vm_area_struct *vma,
- unsigned long addr, pte_t *ptep)
- {
- return huge_ptep_get_and_clear(vma->vm_mm, addr, ptep);
- }
- #endif
- #ifndef huge_ptep_modify_prot_commit
- #define huge_ptep_modify_prot_commit huge_ptep_modify_prot_commit
- static inline void huge_ptep_modify_prot_commit(struct vm_area_struct *vma,
- unsigned long addr, pte_t *ptep,
- pte_t old_pte, pte_t pte)
- {
- set_huge_pte_at(vma->vm_mm, addr, ptep, pte);
- }
- #endif
- #ifdef CONFIG_NUMA
- void hugetlb_register_node(struct node *node);
- void hugetlb_unregister_node(struct node *node);
- #endif
- #else
- struct hstate {};
- static inline struct hugepage_subpool *hugetlb_page_subpool(struct page *hpage)
- {
- return NULL;
- }
- static inline int isolate_or_dissolve_huge_page(struct page *page,
- struct list_head *list)
- {
- return -ENOMEM;
- }
- static inline struct page *alloc_huge_page(struct vm_area_struct *vma,
- unsigned long addr,
- int avoid_reserve)
- {
- return NULL;
- }
- static inline struct page *
- alloc_huge_page_nodemask(struct hstate *h, int preferred_nid,
- nodemask_t *nmask, gfp_t gfp_mask)
- {
- return NULL;
- }
- static inline struct page *alloc_huge_page_vma(struct hstate *h,
- struct vm_area_struct *vma,
- unsigned long address)
- {
- return NULL;
- }
- static inline int __alloc_bootmem_huge_page(struct hstate *h)
- {
- return 0;
- }
- static inline struct hstate *hstate_file(struct file *f)
- {
- return NULL;
- }
- static inline struct hstate *hstate_sizelog(int page_size_log)
- {
- return NULL;
- }
- static inline struct hstate *hstate_vma(struct vm_area_struct *vma)
- {
- return NULL;
- }
- static inline struct hstate *page_hstate(struct page *page)
- {
- return NULL;
- }
- static inline struct hstate *size_to_hstate(unsigned long size)
- {
- return NULL;
- }
- static inline unsigned long huge_page_size(struct hstate *h)
- {
- return PAGE_SIZE;
- }
- static inline unsigned long huge_page_mask(struct hstate *h)
- {
- return PAGE_MASK;
- }
- static inline unsigned long vma_kernel_pagesize(struct vm_area_struct *vma)
- {
- return PAGE_SIZE;
- }
- static inline unsigned long vma_mmu_pagesize(struct vm_area_struct *vma)
- {
- return PAGE_SIZE;
- }
- static inline unsigned int huge_page_order(struct hstate *h)
- {
- return 0;
- }
- static inline unsigned int huge_page_shift(struct hstate *h)
- {
- return PAGE_SHIFT;
- }
- static inline bool hstate_is_gigantic(struct hstate *h)
- {
- return false;
- }
- static inline unsigned int pages_per_huge_page(struct hstate *h)
- {
- return 1;
- }
- static inline unsigned hstate_index_to_shift(unsigned index)
- {
- return 0;
- }
- static inline int hstate_index(struct hstate *h)
- {
- return 0;
- }
- static inline int dissolve_free_huge_page(struct page *page)
- {
- return 0;
- }
- static inline int dissolve_free_huge_pages(unsigned long start_pfn,
- unsigned long end_pfn)
- {
- return 0;
- }
- static inline bool hugepage_migration_supported(struct hstate *h)
- {
- return false;
- }
- static inline bool hugepage_movable_supported(struct hstate *h)
- {
- return false;
- }
- static inline gfp_t htlb_alloc_mask(struct hstate *h)
- {
- return 0;
- }
- static inline gfp_t htlb_modify_alloc_mask(struct hstate *h, gfp_t gfp_mask)
- {
- return 0;
- }
- static inline spinlock_t *huge_pte_lockptr(struct hstate *h,
- struct mm_struct *mm, pte_t *pte)
- {
- return &mm->page_table_lock;
- }
- static inline void hugetlb_count_init(struct mm_struct *mm)
- {
- }
- static inline void hugetlb_report_usage(struct seq_file *f, struct mm_struct *m)
- {
- }
- static inline void hugetlb_count_sub(long l, struct mm_struct *mm)
- {
- }
- static inline pte_t huge_ptep_clear_flush(struct vm_area_struct *vma,
- unsigned long addr, pte_t *ptep)
- {
- return *ptep;
- }
- static inline void set_huge_pte_at(struct mm_struct *mm, unsigned long addr,
- pte_t *ptep, pte_t pte)
- {
- }
- static inline void hugetlb_register_node(struct node *node)
- {
- }
- static inline void hugetlb_unregister_node(struct node *node)
- {
- }
- #endif
- static inline spinlock_t *huge_pte_lock(struct hstate *h,
- struct mm_struct *mm, pte_t *pte)
- {
- spinlock_t *ptl;
- ptl = huge_pte_lockptr(h, mm, pte);
- spin_lock(ptl);
- return ptl;
- }
- #if defined(CONFIG_HUGETLB_PAGE) && defined(CONFIG_CMA)
- extern void __init hugetlb_cma_reserve(int order);
- #else
- static inline __init void hugetlb_cma_reserve(int order)
- {
- }
- #endif
- #ifdef CONFIG_ARCH_WANT_HUGE_PMD_SHARE
- static inline bool hugetlb_pmd_shared(pte_t *pte)
- {
- return page_count(virt_to_page(pte)) > 1;
- }
- #else
- static inline bool hugetlb_pmd_shared(pte_t *pte)
- {
- return false;
- }
- #endif
- bool want_pmd_share(struct vm_area_struct *vma, unsigned long addr);
- #ifndef __HAVE_ARCH_FLUSH_HUGETLB_TLB_RANGE
- #define flush_hugetlb_tlb_range(vma, addr, end) flush_tlb_range(vma, addr, end)
- #endif
- #endif
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