| Andrew Scull | b4b6d4a | 2019-01-02 15:54:55 +0000 | [diff] [blame^] | 1 | /* |
| 2 | * arch/arm64/include/asm/hugetlb.h |
| 3 | * |
| 4 | * Copyright (C) 2013 Linaro Ltd. |
| 5 | * |
| 6 | * Based on arch/x86/include/asm/hugetlb.h |
| 7 | * |
| 8 | * This program is free software; you can redistribute it and/or modify |
| 9 | * it under the terms of the GNU General Public License version 2 as |
| 10 | * published by the Free Software Foundation. |
| 11 | * |
| 12 | * This program is distributed in the hope that it will be useful, |
| 13 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 14 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 15 | * GNU General Public License for more details. |
| 16 | */ |
| 17 | |
| 18 | #ifndef __ASM_HUGETLB_H |
| 19 | #define __ASM_HUGETLB_H |
| 20 | |
| 21 | #include <asm/page.h> |
| 22 | |
| 23 | static inline pte_t huge_ptep_get(pte_t *ptep) |
| 24 | { |
| 25 | return READ_ONCE(*ptep); |
| 26 | } |
| 27 | |
| 28 | |
| 29 | |
| 30 | static inline void hugetlb_free_pgd_range(struct mmu_gather *tlb, |
| 31 | unsigned long addr, unsigned long end, |
| 32 | unsigned long floor, |
| 33 | unsigned long ceiling) |
| 34 | { |
| 35 | free_pgd_range(tlb, addr, end, floor, ceiling); |
| 36 | } |
| 37 | |
| 38 | static inline int is_hugepage_only_range(struct mm_struct *mm, |
| 39 | unsigned long addr, unsigned long len) |
| 40 | { |
| 41 | return 0; |
| 42 | } |
| 43 | |
| 44 | static inline int prepare_hugepage_range(struct file *file, |
| 45 | unsigned long addr, unsigned long len) |
| 46 | { |
| 47 | struct hstate *h = hstate_file(file); |
| 48 | if (len & ~huge_page_mask(h)) |
| 49 | return -EINVAL; |
| 50 | if (addr & ~huge_page_mask(h)) |
| 51 | return -EINVAL; |
| 52 | return 0; |
| 53 | } |
| 54 | |
| 55 | static inline int huge_pte_none(pte_t pte) |
| 56 | { |
| 57 | return pte_none(pte); |
| 58 | } |
| 59 | |
| 60 | static inline pte_t huge_pte_wrprotect(pte_t pte) |
| 61 | { |
| 62 | return pte_wrprotect(pte); |
| 63 | } |
| 64 | |
| 65 | static inline void arch_clear_hugepage_flags(struct page *page) |
| 66 | { |
| 67 | clear_bit(PG_dcache_clean, &page->flags); |
| 68 | } |
| 69 | |
| 70 | extern pte_t arch_make_huge_pte(pte_t entry, struct vm_area_struct *vma, |
| 71 | struct page *page, int writable); |
| 72 | #define arch_make_huge_pte arch_make_huge_pte |
| 73 | extern void set_huge_pte_at(struct mm_struct *mm, unsigned long addr, |
| 74 | pte_t *ptep, pte_t pte); |
| 75 | extern int huge_ptep_set_access_flags(struct vm_area_struct *vma, |
| 76 | unsigned long addr, pte_t *ptep, |
| 77 | pte_t pte, int dirty); |
| 78 | extern pte_t huge_ptep_get_and_clear(struct mm_struct *mm, |
| 79 | unsigned long addr, pte_t *ptep); |
| 80 | extern void huge_ptep_set_wrprotect(struct mm_struct *mm, |
| 81 | unsigned long addr, pte_t *ptep); |
| 82 | extern void huge_ptep_clear_flush(struct vm_area_struct *vma, |
| 83 | unsigned long addr, pte_t *ptep); |
| 84 | extern void huge_pte_clear(struct mm_struct *mm, unsigned long addr, |
| 85 | pte_t *ptep, unsigned long sz); |
| 86 | #define huge_pte_clear huge_pte_clear |
| 87 | extern void set_huge_swap_pte_at(struct mm_struct *mm, unsigned long addr, |
| 88 | pte_t *ptep, pte_t pte, unsigned long sz); |
| 89 | #define set_huge_swap_pte_at set_huge_swap_pte_at |
| 90 | |
| 91 | #include <asm-generic/hugetlb.h> |
| 92 | |
| 93 | #ifdef CONFIG_ARCH_HAS_GIGANTIC_PAGE |
| 94 | static inline bool gigantic_page_supported(void) { return true; } |
| 95 | #endif |
| 96 | |
| 97 | #endif /* __ASM_HUGETLB_H */ |