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1042 lines
27 KiB
1042 lines
27 KiB
/* SPDX-License-Identifier: GPL-2.0 */ |
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#ifndef _LINUX_HUGETLB_H |
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#define _LINUX_HUGETLB_H |
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|
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#include <linux/mm_types.h> |
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#include <linux/mmdebug.h> |
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#include <linux/fs.h> |
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#include <linux/hugetlb_inline.h> |
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#include <linux/cgroup.h> |
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#include <linux/list.h> |
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#include <linux/kref.h> |
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#include <linux/pgtable.h> |
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#include <linux/gfp.h> |
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struct ctl_table; |
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struct user_struct; |
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struct mmu_gather; |
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#ifndef is_hugepd |
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typedef struct { unsigned long pd; } hugepd_t; |
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#define is_hugepd(hugepd) (0) |
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#define __hugepd(x) ((hugepd_t) { (x) }) |
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#endif |
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#ifdef CONFIG_HUGETLB_PAGE |
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#include <linux/mempolicy.h> |
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#include <linux/shm.h> |
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#include <asm/tlbflush.h> |
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struct hugepage_subpool { |
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spinlock_t lock; |
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long count; |
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long max_hpages; /* Maximum huge pages or -1 if no maximum. */ |
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long used_hpages; /* Used count against maximum, includes */ |
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/* both alloced and reserved pages. */ |
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struct hstate *hstate; |
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long min_hpages; /* Minimum huge pages or -1 if no minimum. */ |
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long rsv_hpages; /* Pages reserved against global pool to */ |
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/* satisfy minimum size. */ |
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}; |
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struct resv_map { |
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struct kref refs; |
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spinlock_t lock; |
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struct list_head regions; |
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long adds_in_progress; |
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struct list_head region_cache; |
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long region_cache_count; |
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#ifdef CONFIG_CGROUP_HUGETLB |
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/* |
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* On private mappings, the counter to uncharge reservations is stored |
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* here. If these fields are 0, then either the mapping is shared, or |
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* cgroup accounting is disabled for this resv_map. |
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*/ |
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struct page_counter *reservation_counter; |
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unsigned long pages_per_hpage; |
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struct cgroup_subsys_state *css; |
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#endif |
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}; |
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/* |
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* Region tracking -- allows tracking of reservations and instantiated pages |
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* across the pages in a mapping. |
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* |
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* The region data structures are embedded into a resv_map and protected |
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* by a resv_map's lock. The set of regions within the resv_map represent |
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* reservations for huge pages, or huge pages that have already been |
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* instantiated within the map. The from and to elements are huge page |
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* indicies into the associated mapping. from indicates the starting index |
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* of the region. to represents the first index past the end of the region. |
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* |
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* For example, a file region structure with from == 0 and to == 4 represents |
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* four huge pages in a mapping. It is important to note that the to element |
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* represents the first element past the end of the region. This is used in |
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* arithmetic as 4(to) - 0(from) = 4 huge pages in the region. |
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* |
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* Interval notation of the form [from, to) will be used to indicate that |
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* the endpoint from is inclusive and to is exclusive. |
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*/ |
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struct file_region { |
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struct list_head link; |
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long from; |
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long to; |
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#ifdef CONFIG_CGROUP_HUGETLB |
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/* |
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* On shared mappings, each reserved region appears as a struct |
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* file_region in resv_map. These fields hold the info needed to |
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* uncharge each reservation. |
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*/ |
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struct page_counter *reservation_counter; |
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struct cgroup_subsys_state *css; |
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#endif |
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}; |
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|
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extern struct resv_map *resv_map_alloc(void); |
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void resv_map_release(struct kref *ref); |
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|
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extern spinlock_t hugetlb_lock; |
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extern int hugetlb_max_hstate __read_mostly; |
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#define for_each_hstate(h) \ |
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for ((h) = hstates; (h) < &hstates[hugetlb_max_hstate]; (h)++) |
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struct hugepage_subpool *hugepage_new_subpool(struct hstate *h, long max_hpages, |
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long min_hpages); |
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void hugepage_put_subpool(struct hugepage_subpool *spool); |
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void reset_vma_resv_huge_pages(struct vm_area_struct *vma); |
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int hugetlb_sysctl_handler(struct ctl_table *, int, void *, size_t *, loff_t *); |
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int hugetlb_overcommit_handler(struct ctl_table *, int, void *, size_t *, |
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loff_t *); |
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int hugetlb_treat_movable_handler(struct ctl_table *, int, void *, size_t *, |
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loff_t *); |
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int hugetlb_mempolicy_sysctl_handler(struct ctl_table *, int, void *, size_t *, |
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loff_t *); |
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int copy_hugetlb_page_range(struct mm_struct *, struct mm_struct *, struct vm_area_struct *); |
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long follow_hugetlb_page(struct mm_struct *, struct vm_area_struct *, |
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struct page **, struct vm_area_struct **, |
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unsigned long *, unsigned long *, long, unsigned int, |
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int *); |
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void unmap_hugepage_range(struct vm_area_struct *, |
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unsigned long, unsigned long, struct page *); |
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void __unmap_hugepage_range_final(struct mmu_gather *tlb, |
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struct vm_area_struct *vma, |
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unsigned long start, unsigned long end, |
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struct page *ref_page); |
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void __unmap_hugepage_range(struct mmu_gather *tlb, struct vm_area_struct *vma, |
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unsigned long start, unsigned long end, |
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struct page *ref_page); |
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void hugetlb_report_meminfo(struct seq_file *); |
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int hugetlb_report_node_meminfo(char *buf, int len, int nid); |
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void hugetlb_show_meminfo(void); |
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unsigned long hugetlb_total_pages(void); |
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vm_fault_t hugetlb_fault(struct mm_struct *mm, struct vm_area_struct *vma, |
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unsigned long address, unsigned int flags); |
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int hugetlb_mcopy_atomic_pte(struct mm_struct *dst_mm, pte_t *dst_pte, |
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struct vm_area_struct *dst_vma, |
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unsigned long dst_addr, |
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unsigned long src_addr, |
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struct page **pagep); |
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bool hugetlb_reserve_pages(struct inode *inode, long from, long to, |
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struct vm_area_struct *vma, |
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vm_flags_t vm_flags); |
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long hugetlb_unreserve_pages(struct inode *inode, long start, long end, |
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long freed); |
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bool isolate_huge_page(struct page *page, struct list_head *list); |
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void putback_active_hugepage(struct page *page); |
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void move_hugetlb_state(struct page *oldpage, struct page *newpage, int reason); |
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void free_huge_page(struct page *page); |
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void hugetlb_fix_reserve_counts(struct inode *inode); |
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extern struct mutex *hugetlb_fault_mutex_table; |
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u32 hugetlb_fault_mutex_hash(struct address_space *mapping, pgoff_t idx); |
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pte_t *huge_pmd_share(struct mm_struct *mm, unsigned long addr, pud_t *pud); |
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struct address_space *hugetlb_page_mapping_lock_write(struct page *hpage); |
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extern int sysctl_hugetlb_shm_group; |
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extern struct list_head huge_boot_pages; |
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/* arch callbacks */ |
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pte_t *huge_pte_alloc(struct mm_struct *mm, |
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unsigned long addr, unsigned long sz); |
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pte_t *huge_pte_offset(struct mm_struct *mm, |
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unsigned long addr, unsigned long sz); |
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int huge_pmd_unshare(struct mm_struct *mm, struct vm_area_struct *vma, |
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unsigned long *addr, pte_t *ptep); |
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void adjust_range_if_pmd_sharing_possible(struct vm_area_struct *vma, |
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unsigned long *start, unsigned long *end); |
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struct page *follow_huge_addr(struct mm_struct *mm, unsigned long address, |
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int write); |
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struct page *follow_huge_pd(struct vm_area_struct *vma, |
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unsigned long address, hugepd_t hpd, |
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int flags, int pdshift); |
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struct page *follow_huge_pmd(struct mm_struct *mm, unsigned long address, |
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pmd_t *pmd, int flags); |
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struct page *follow_huge_pud(struct mm_struct *mm, unsigned long address, |
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pud_t *pud, int flags); |
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struct page *follow_huge_pgd(struct mm_struct *mm, unsigned long address, |
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pgd_t *pgd, int flags); |
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int pmd_huge(pmd_t pmd); |
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int pud_huge(pud_t pud); |
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unsigned long hugetlb_change_protection(struct vm_area_struct *vma, |
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unsigned long address, unsigned long end, pgprot_t newprot); |
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bool is_hugetlb_entry_migration(pte_t pte); |
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#else /* !CONFIG_HUGETLB_PAGE */ |
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static inline void reset_vma_resv_huge_pages(struct vm_area_struct *vma) |
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{ |
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} |
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static inline unsigned long hugetlb_total_pages(void) |
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{ |
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return 0; |
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} |
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static inline struct address_space *hugetlb_page_mapping_lock_write( |
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struct page *hpage) |
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{ |
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return NULL; |
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} |
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static inline int huge_pmd_unshare(struct mm_struct *mm, |
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struct vm_area_struct *vma, |
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unsigned long *addr, pte_t *ptep) |
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{ |
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return 0; |
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} |
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static inline void adjust_range_if_pmd_sharing_possible( |
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struct vm_area_struct *vma, |
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unsigned long *start, unsigned long *end) |
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{ |
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} |
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static inline long follow_hugetlb_page(struct mm_struct *mm, |
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struct vm_area_struct *vma, struct page **pages, |
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struct vm_area_struct **vmas, unsigned long *position, |
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unsigned long *nr_pages, long i, unsigned int flags, |
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int *nonblocking) |
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{ |
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BUG(); |
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return 0; |
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} |
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static inline struct page *follow_huge_addr(struct mm_struct *mm, |
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unsigned long address, int write) |
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{ |
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return ERR_PTR(-EINVAL); |
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} |
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static inline int copy_hugetlb_page_range(struct mm_struct *dst, |
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struct mm_struct *src, struct vm_area_struct *vma) |
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{ |
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BUG(); |
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return 0; |
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} |
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static inline void hugetlb_report_meminfo(struct seq_file *m) |
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{ |
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} |
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static inline int hugetlb_report_node_meminfo(char *buf, int len, int nid) |
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{ |
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return 0; |
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} |
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static inline void hugetlb_show_meminfo(void) |
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{ |
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} |
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static inline struct page *follow_huge_pd(struct vm_area_struct *vma, |
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unsigned long address, hugepd_t hpd, int flags, |
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int pdshift) |
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{ |
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return NULL; |
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} |
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static inline struct page *follow_huge_pmd(struct mm_struct *mm, |
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unsigned long address, pmd_t *pmd, int flags) |
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{ |
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return NULL; |
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} |
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static inline struct page *follow_huge_pud(struct mm_struct *mm, |
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unsigned long address, pud_t *pud, int flags) |
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{ |
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return NULL; |
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} |
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static inline struct page *follow_huge_pgd(struct mm_struct *mm, |
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unsigned long address, pgd_t *pgd, int flags) |
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{ |
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return NULL; |
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} |
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static inline int prepare_hugepage_range(struct file *file, |
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unsigned long addr, unsigned long len) |
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{ |
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return -EINVAL; |
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} |
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static inline int pmd_huge(pmd_t pmd) |
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{ |
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return 0; |
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} |
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static inline int pud_huge(pud_t pud) |
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{ |
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return 0; |
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} |
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static inline int is_hugepage_only_range(struct mm_struct *mm, |
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unsigned long addr, unsigned long len) |
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{ |
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return 0; |
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} |
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static inline void hugetlb_free_pgd_range(struct mmu_gather *tlb, |
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unsigned long addr, unsigned long end, |
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unsigned long floor, unsigned long ceiling) |
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{ |
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BUG(); |
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} |
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static inline int hugetlb_mcopy_atomic_pte(struct mm_struct *dst_mm, |
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pte_t *dst_pte, |
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struct vm_area_struct *dst_vma, |
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unsigned long dst_addr, |
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unsigned long src_addr, |
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struct page **pagep) |
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{ |
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BUG(); |
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return 0; |
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} |
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static inline pte_t *huge_pte_offset(struct mm_struct *mm, unsigned long addr, |
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unsigned long sz) |
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{ |
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return NULL; |
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} |
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static inline bool isolate_huge_page(struct page *page, struct list_head *list) |
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{ |
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return false; |
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} |
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static inline void putback_active_hugepage(struct page *page) |
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{ |
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} |
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static inline void move_hugetlb_state(struct page *oldpage, |
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struct page *newpage, int reason) |
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{ |
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} |
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static inline unsigned long hugetlb_change_protection( |
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struct vm_area_struct *vma, unsigned long address, |
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unsigned long end, pgprot_t newprot) |
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{ |
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return 0; |
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} |
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static inline void __unmap_hugepage_range_final(struct mmu_gather *tlb, |
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struct vm_area_struct *vma, unsigned long start, |
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unsigned long end, struct page *ref_page) |
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{ |
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BUG(); |
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} |
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static inline void __unmap_hugepage_range(struct mmu_gather *tlb, |
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struct vm_area_struct *vma, unsigned long start, |
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unsigned long end, struct page *ref_page) |
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{ |
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BUG(); |
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} |
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static inline vm_fault_t hugetlb_fault(struct mm_struct *mm, |
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struct vm_area_struct *vma, unsigned long address, |
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unsigned int flags) |
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{ |
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BUG(); |
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return 0; |
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} |
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#endif /* !CONFIG_HUGETLB_PAGE */ |
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/* |
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* hugepages at page global directory. If arch support |
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* hugepages at pgd level, they need to define this. |
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*/ |
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#ifndef pgd_huge |
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#define pgd_huge(x) 0 |
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#endif |
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#ifndef p4d_huge |
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#define p4d_huge(x) 0 |
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#endif |
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#ifndef pgd_write |
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static inline int pgd_write(pgd_t pgd) |
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{ |
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BUG(); |
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return 0; |
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} |
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#endif |
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#define HUGETLB_ANON_FILE "anon_hugepage" |
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enum { |
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/* |
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* The file will be used as an shm file so shmfs accounting rules |
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* apply |
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*/ |
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HUGETLB_SHMFS_INODE = 1, |
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/* |
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* The file is being created on the internal vfs mount and shmfs |
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* accounting rules do not apply |
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*/ |
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HUGETLB_ANONHUGE_INODE = 2, |
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}; |
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#ifdef CONFIG_HUGETLBFS |
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struct hugetlbfs_sb_info { |
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long max_inodes; /* inodes allowed */ |
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long free_inodes; /* inodes free */ |
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spinlock_t stat_lock; |
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struct hstate *hstate; |
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struct hugepage_subpool *spool; |
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kuid_t uid; |
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kgid_t gid; |
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umode_t mode; |
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}; |
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static inline struct hugetlbfs_sb_info *HUGETLBFS_SB(struct super_block *sb) |
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{ |
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return sb->s_fs_info; |
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} |
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struct hugetlbfs_inode_info { |
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struct shared_policy policy; |
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struct inode vfs_inode; |
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unsigned int seals; |
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}; |
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static inline struct hugetlbfs_inode_info *HUGETLBFS_I(struct inode *inode) |
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{ |
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return container_of(inode, struct hugetlbfs_inode_info, vfs_inode); |
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} |
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extern const struct file_operations hugetlbfs_file_operations; |
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extern const struct vm_operations_struct hugetlb_vm_ops; |
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struct file *hugetlb_file_setup(const char *name, size_t size, vm_flags_t acct, |
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struct user_struct **user, int creat_flags, |
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int page_size_log); |
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static inline bool is_file_hugepages(struct file *file) |
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{ |
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if (file->f_op == &hugetlbfs_file_operations) |
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return true; |
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return is_file_shm_hugepages(file); |
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} |
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static inline struct hstate *hstate_inode(struct inode *i) |
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{ |
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return HUGETLBFS_SB(i->i_sb)->hstate; |
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} |
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#else /* !CONFIG_HUGETLBFS */ |
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#define is_file_hugepages(file) false |
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static inline struct file * |
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hugetlb_file_setup(const char *name, size_t size, vm_flags_t acctflag, |
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struct user_struct **user, int creat_flags, |
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int page_size_log) |
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{ |
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return ERR_PTR(-ENOSYS); |
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} |
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static inline struct hstate *hstate_inode(struct inode *i) |
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{ |
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return NULL; |
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} |
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#endif /* !CONFIG_HUGETLBFS */ |
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|
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#ifdef HAVE_ARCH_HUGETLB_UNMAPPED_AREA |
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unsigned long hugetlb_get_unmapped_area(struct file *file, unsigned long addr, |
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unsigned long len, unsigned long pgoff, |
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unsigned long flags); |
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#endif /* HAVE_ARCH_HUGETLB_UNMAPPED_AREA */ |
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|
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/* |
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* huegtlb page specific state flags. These flags are located in page.private |
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* of the hugetlb head page. Functions created via the below macros should be |
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* used to manipulate these flags. |
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* |
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* HPG_restore_reserve - Set when a hugetlb page consumes a reservation at |
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* allocation time. Cleared when page is fully instantiated. Free |
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* routine checks flag to restore a reservation on error paths. |
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* Synchronization: Examined or modified by code that knows it has |
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* the only reference to page. i.e. After allocation but before use |
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* or when the page is being freed. |
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* HPG_migratable - Set after a newly allocated page is added to the page |
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* cache and/or page tables. Indicates the page is a candidate for |
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* migration. |
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* Synchronization: Initially set after new page allocation with no |
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* locking. When examined and modified during migration processing |
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* (isolate, migrate, putback) the hugetlb_lock is held. |
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* HPG_temporary - - Set on a page that is temporarily allocated from the buddy |
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* allocator. Typically used for migration target pages when no pages |
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* are available in the pool. The hugetlb free page path will |
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* immediately free pages with this flag set to the buddy allocator. |
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* Synchronization: Can be set after huge page allocation from buddy when |
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* code knows it has only reference. All other examinations and |
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* modifications require hugetlb_lock. |
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* HPG_freed - Set when page is on the free lists. |
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* Synchronization: hugetlb_lock held for examination and modification. |
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*/ |
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enum hugetlb_page_flags { |
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HPG_restore_reserve = 0, |
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HPG_migratable, |
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HPG_temporary, |
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HPG_freed, |
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__NR_HPAGEFLAGS, |
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}; |
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|
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/* |
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* Macros to create test, set and clear function definitions for |
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* hugetlb specific page flags. |
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*/ |
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#ifdef CONFIG_HUGETLB_PAGE |
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#define TESTHPAGEFLAG(uname, flname) \ |
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static inline int HPage##uname(struct page *page) \ |
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{ return test_bit(HPG_##flname, &(page->private)); } |
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|
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#define SETHPAGEFLAG(uname, flname) \ |
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static inline void SetHPage##uname(struct page *page) \ |
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{ set_bit(HPG_##flname, &(page->private)); } |
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|
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#define CLEARHPAGEFLAG(uname, flname) \ |
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static inline void ClearHPage##uname(struct page *page) \ |
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{ clear_bit(HPG_##flname, &(page->private)); } |
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#else |
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#define TESTHPAGEFLAG(uname, flname) \ |
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static inline int HPage##uname(struct page *page) \ |
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{ return 0; } |
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|
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#define SETHPAGEFLAG(uname, flname) \ |
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static inline void SetHPage##uname(struct page *page) \ |
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{ } |
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|
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#define CLEARHPAGEFLAG(uname, flname) \ |
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static inline void ClearHPage##uname(struct page *page) \ |
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{ } |
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#endif |
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|
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#define HPAGEFLAG(uname, flname) \ |
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TESTHPAGEFLAG(uname, flname) \ |
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SETHPAGEFLAG(uname, flname) \ |
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CLEARHPAGEFLAG(uname, flname) \ |
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|
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/* |
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* Create functions associated with hugetlb page flags |
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*/ |
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HPAGEFLAG(RestoreReserve, restore_reserve) |
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HPAGEFLAG(Migratable, migratable) |
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HPAGEFLAG(Temporary, temporary) |
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HPAGEFLAG(Freed, freed) |
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|
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#ifdef CONFIG_HUGETLB_PAGE |
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|
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#define HSTATE_NAME_LEN 32 |
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/* Defines one hugetlb page size */ |
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struct hstate { |
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int next_nid_to_alloc; |
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int next_nid_to_free; |
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unsigned int 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 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 |
|
/* cgroup control files */ |
|
struct cftype cgroup_files_dfl[7]; |
|
struct cftype cgroup_files_legacy[9]; |
|
#endif |
|
char name[HSTATE_NAME_LEN]; |
|
}; |
|
|
|
struct huge_bootmem_page { |
|
struct list_head list; |
|
struct hstate *hstate; |
|
}; |
|
|
|
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 huge_add_to_page_cache(struct page *page, struct address_space *mapping, |
|
pgoff_t idx); |
|
|
|
/* arch callback */ |
|
int __init __alloc_bootmem_huge_page(struct hstate *h); |
|
int __init alloc_bootmem_huge_page(struct hstate *h); |
|
|
|
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]) |
|
|
|
/* |
|
* hugetlb page subpool pointer located in hpage[1].private |
|
*/ |
|
static inline struct hugepage_subpool *hugetlb_page_subpool(struct page *hpage) |
|
{ |
|
return (struct hugepage_subpool *)(hpage+1)->private; |
|
} |
|
|
|
static inline void hugetlb_set_page_subpool(struct page *hpage, |
|
struct hugepage_subpool *subpool) |
|
{ |
|
set_page_private(hpage+1, (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; |
|
|
|
return size_to_hstate(1UL << page_size_log); |
|
} |
|
|
|
static inline struct hstate *hstate_vma(struct vm_area_struct *vma) |
|
{ |
|
return hstate_file(vma->vm_file); |
|
} |
|
|
|
static inline unsigned long huge_page_size(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(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, struct vm_area_struct *vma, |
|
struct page *page, int writable) |
|
{ |
|
return 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; |
|
} |
|
|
|
pgoff_t __basepage_index(struct page *page); |
|
|
|
/* Return page->index in PAGE_SIZE units */ |
|
static inline pgoff_t basepage_index(struct page *page) |
|
{ |
|
if (!PageCompound(page)) |
|
return page->index; |
|
|
|
return __basepage_index(page); |
|
} |
|
|
|
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_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); |
|
} |
|
|
|
/* |
|
* Movability check is different as compared to migration check. |
|
* It determines whether or not a huge page should be placed on |
|
* movable zone or not. Movability of any huge page should be |
|
* required only if huge page size is supported for migration. |
|
* There wont be any reason for the huge page to be movable if |
|
* it is not migratable to start with. Also the size of the huge |
|
* page should be large enough to be placed under a movable zone |
|
* and still feasible enough to be migratable. Just the presence |
|
* in movable zone does not make the migration feasible. |
|
* |
|
* So even though large huge page sizes like the gigantic ones |
|
* are migratable they should not be movable because its not |
|
* feasible to migrate them from movable zone. |
|
*/ |
|
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; |
|
} |
|
|
|
/* Movability of hugepages depends on migration support. */ |
|
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); |
|
|
|
/* Some callers might want to enforce node */ |
|
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 |
|
/* |
|
* Some platform decide whether they support huge pages at boot |
|
* time. Some of them, such as powerpc, set HPAGE_SHIFT to 0 |
|
* when there is no such support |
|
*/ |
|
#define hugepages_supported() (HPAGE_SHIFT != 0) |
|
#endif |
|
|
|
void hugetlb_report_usage(struct seq_file *m, struct mm_struct *mm); |
|
|
|
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 set_huge_swap_pte_at |
|
static inline void set_huge_swap_pte_at(struct mm_struct *mm, unsigned long addr, |
|
pte_t *ptep, pte_t pte, unsigned long sz) |
|
{ |
|
set_huge_pte_at(mm, addr, ptep, pte); |
|
} |
|
#endif |
|
|
|
#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 |
|
|
|
#else /* CONFIG_HUGETLB_PAGE */ |
|
struct hstate {}; |
|
|
|
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 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 pgoff_t basepage_index(struct page *page) |
|
{ |
|
return page->index; |
|
} |
|
|
|
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_report_usage(struct seq_file *f, struct mm_struct *m) |
|
{ |
|
} |
|
|
|
static inline void hugetlb_count_sub(long l, struct mm_struct *mm) |
|
{ |
|
} |
|
|
|
static inline void set_huge_swap_pte_at(struct mm_struct *mm, unsigned long addr, |
|
pte_t *ptep, pte_t pte, unsigned long sz) |
|
{ |
|
} |
|
#endif /* CONFIG_HUGETLB_PAGE */ |
|
|
|
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); |
|
extern void __init hugetlb_cma_check(void); |
|
#else |
|
static inline __init void hugetlb_cma_reserve(int order) |
|
{ |
|
} |
|
static inline __init void hugetlb_cma_check(void) |
|
{ |
|
} |
|
#endif |
|
|
|
#endif /* _LINUX_HUGETLB_H */
|
|
|