636 lines
17 KiB
C
636 lines
17 KiB
C
/* 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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#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 <asm/pgtable.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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/*
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* Some architectures requires a hugepage directory format that is
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* required to support multiple hugepage sizes. For example
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* a4fe3ce76 "powerpc/mm: Allow more flexible layouts for hugepage pagetables"
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* introduced the same on powerpc. This allows for a more flexible hugepage
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* pagetable layout.
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*/
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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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static inline int gup_huge_pd(hugepd_t hugepd, unsigned long addr,
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unsigned pdshift, unsigned long end,
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int write, struct page **pages, int *nr)
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{
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return 0;
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}
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#else
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extern int gup_huge_pd(hugepd_t hugepd, unsigned long addr,
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unsigned pdshift, unsigned long end,
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int write, struct page **pages, int *nr);
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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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/* sasitfy 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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};
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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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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 __user *, size_t *, loff_t *);
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int hugetlb_overcommit_handler(struct ctl_table *, int, void __user *, size_t *, loff_t *);
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int hugetlb_treat_movable_handler(struct ctl_table *, int, void __user *, size_t *, loff_t *);
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#ifdef CONFIG_NUMA
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int hugetlb_mempolicy_sysctl_handler(struct ctl_table *, int,
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void __user *, size_t *, loff_t *);
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#endif
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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(int, char *);
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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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int 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 hstate *h, struct mm_struct *mm,
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struct vm_area_struct *vma,
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struct address_space *mapping,
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pgoff_t idx, unsigned long address);
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pte_t *huge_pmd_share(struct mm_struct *mm, unsigned long addr, pud_t *pud);
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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, 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 int huge_pmd_unshare(struct mm_struct *mm, unsigned long *addr,
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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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#define follow_hugetlb_page(m,v,p,vs,a,b,i,w,n) ({ BUG(); 0; })
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#define follow_huge_addr(mm, addr, write) ERR_PTR(-EINVAL)
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#define copy_hugetlb_page_range(src, dst, vma) ({ BUG(); 0; })
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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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#define hugetlb_report_node_meminfo(n, buf) 0
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static inline void hugetlb_show_meminfo(void)
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{
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}
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#define follow_huge_pd(vma, addr, hpd, flags, pdshift) NULL
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#define follow_huge_pmd(mm, addr, pmd, flags) NULL
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#define follow_huge_pud(mm, addr, pud, flags) NULL
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#define follow_huge_pgd(mm, addr, pgd, flags) NULL
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#define prepare_hugepage_range(file, addr, len) (-EINVAL)
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#define pmd_huge(x) 0
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#define pud_huge(x) 0
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#define is_hugepage_only_range(mm, addr, len) 0
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#define hugetlb_free_pgd_range(tlb, addr, end, floor, ceiling) ({BUG(); 0; })
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#define hugetlb_fault(mm, vma, addr, flags) ({ BUG(); 0; })
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#define hugetlb_mcopy_atomic_pte(dst_mm, dst_pte, dst_vma, dst_addr, \
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src_addr, pagep) ({ BUG(); 0; })
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#define huge_pte_offset(mm, address, sz) 0
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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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#define putback_active_hugepage(p) do {} while (0)
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#define move_hugetlb_state(old, new, reason) do {} while (0)
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static inline 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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{
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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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#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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#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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#endif /* !CONFIG_HUGETLBFS */
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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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#ifdef CONFIG_HUGETLB_PAGE
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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;
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unsigned long mask;
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unsigned long max_huge_pages;
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unsigned long nr_huge_pages;
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unsigned long free_huge_pages;
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unsigned long resv_huge_pages;
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unsigned long surplus_huge_pages;
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unsigned long nr_overcommit_huge_pages;
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struct list_head hugepage_activelist;
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struct list_head hugepage_freelists[MAX_NUMNODES];
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unsigned int nr_huge_pages_node[MAX_NUMNODES];
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unsigned int free_huge_pages_node[MAX_NUMNODES];
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unsigned int surplus_huge_pages_node[MAX_NUMNODES];
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#ifdef CONFIG_CGROUP_HUGETLB
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/* cgroup control files */
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struct cftype cgroup_files[5];
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#endif
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char name[HSTATE_NAME_LEN];
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};
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struct huge_bootmem_page {
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struct list_head list;
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struct hstate *hstate;
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};
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struct page *alloc_huge_page(struct vm_area_struct *vma,
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unsigned long addr, int avoid_reserve);
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struct page *alloc_huge_page_node(struct hstate *h, int nid);
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struct page *alloc_huge_page_nodemask(struct hstate *h, int preferred_nid,
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nodemask_t *nmask);
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struct page *alloc_huge_page_vma(struct hstate *h, struct vm_area_struct *vma,
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unsigned long address);
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int huge_add_to_page_cache(struct page *page, struct address_space *mapping,
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pgoff_t idx);
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/* arch callback */
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int __init __alloc_bootmem_huge_page(struct hstate *h);
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int __init alloc_bootmem_huge_page(struct hstate *h);
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void __init hugetlb_bad_size(void);
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void __init hugetlb_add_hstate(unsigned order);
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struct hstate *size_to_hstate(unsigned long size);
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#ifndef HUGE_MAX_HSTATE
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#define HUGE_MAX_HSTATE 1
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#endif
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extern struct hstate hstates[HUGE_MAX_HSTATE];
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extern unsigned int default_hstate_idx;
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#define default_hstate (hstates[default_hstate_idx])
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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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static inline struct hstate *hstate_file(struct file *f)
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{
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return hstate_inode(file_inode(f));
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}
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static inline struct hstate *hstate_sizelog(int page_size_log)
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{
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if (!page_size_log)
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return &default_hstate;
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return size_to_hstate(1UL << page_size_log);
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}
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static inline struct hstate *hstate_vma(struct vm_area_struct *vma)
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{
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return hstate_file(vma->vm_file);
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}
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static inline unsigned long huge_page_size(struct hstate *h)
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{
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return (unsigned long)PAGE_SIZE << h->order;
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}
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extern unsigned long vma_kernel_pagesize(struct vm_area_struct *vma);
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extern unsigned long vma_mmu_pagesize(struct vm_area_struct *vma);
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static inline unsigned long huge_page_mask(struct hstate *h)
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{
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return h->mask;
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}
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static inline unsigned int huge_page_order(struct hstate *h)
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{
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return h->order;
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}
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static inline unsigned huge_page_shift(struct hstate *h)
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{
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return h->order + PAGE_SHIFT;
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}
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static inline bool hstate_is_gigantic(struct hstate *h)
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{
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return huge_page_order(h) >= MAX_ORDER;
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}
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static inline unsigned int pages_per_huge_page(struct hstate *h)
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{
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return 1 << h->order;
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}
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static inline unsigned int blocks_per_huge_page(struct hstate *h)
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{
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return huge_page_size(h) / 512;
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}
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#include <asm/hugetlb.h>
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#ifndef arch_make_huge_pte
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static inline pte_t arch_make_huge_pte(pte_t entry, struct vm_area_struct *vma,
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struct page *page, int writable)
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{
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return entry;
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}
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#endif
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static inline struct hstate *page_hstate(struct page *page)
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{
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VM_BUG_ON_PAGE(!PageHuge(page), page);
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return size_to_hstate(PAGE_SIZE << compound_order(page));
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}
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static inline unsigned hstate_index_to_shift(unsigned index)
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{
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return hstates[index].order + PAGE_SHIFT;
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}
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static inline int hstate_index(struct hstate *h)
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{
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return h - hstates;
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}
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pgoff_t __basepage_index(struct page *page);
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/* Return page->index in PAGE_SIZE units */
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static inline pgoff_t basepage_index(struct page *page)
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|
{
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|
if (!PageCompound(page))
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|
return page->index;
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|
|
|
return __basepage_index(page);
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|
}
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|
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|
extern int dissolve_free_huge_page(struct page *page);
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|
extern int dissolve_free_huge_pages(unsigned long start_pfn,
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|
unsigned long end_pfn);
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|
static inline bool hugepage_migration_supported(struct hstate *h)
|
|
{
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|
#ifdef CONFIG_ARCH_ENABLE_HUGEPAGE_MIGRATION
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|
if ((huge_page_shift(h) == PMD_SHIFT) ||
|
|
(huge_page_shift(h) == PGDIR_SHIFT))
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|
return true;
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|
else
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|
return false;
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|
#else
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|
return false;
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|
#endif
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|
}
|
|
|
|
static inline spinlock_t *huge_pte_lockptr(struct hstate *h,
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|
struct mm_struct *mm, pte_t *pte)
|
|
{
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|
if (huge_page_size(h) == PMD_SIZE)
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|
return pmd_lockptr(mm, (pmd_t *) pte);
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|
VM_BUG_ON(huge_page_size(h) == PAGE_SIZE);
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|
return &mm->page_table_lock;
|
|
}
|
|
|
|
#ifndef hugepages_supported
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|
/*
|
|
* 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
|
|
#else /* CONFIG_HUGETLB_PAGE */
|
|
struct hstate {};
|
|
#define alloc_huge_page(v, a, r) NULL
|
|
#define alloc_huge_page_node(h, nid) NULL
|
|
#define alloc_huge_page_nodemask(h, preferred_nid, nmask) NULL
|
|
#define alloc_huge_page_vma(h, vma, address) NULL
|
|
#define alloc_bootmem_huge_page(h) NULL
|
|
#define hstate_file(f) NULL
|
|
#define hstate_sizelog(s) NULL
|
|
#define hstate_vma(v) NULL
|
|
#define hstate_inode(i) NULL
|
|
#define page_hstate(page) NULL
|
|
#define huge_page_size(h) PAGE_SIZE
|
|
#define huge_page_mask(h) PAGE_MASK
|
|
#define vma_kernel_pagesize(v) PAGE_SIZE
|
|
#define vma_mmu_pagesize(v) PAGE_SIZE
|
|
#define huge_page_order(h) 0
|
|
#define huge_page_shift(h) 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 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;
|
|
}
|
|
|
|
#endif /* _LINUX_HUGETLB_H */
|