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1/* SPDX-License-Identifier: GPL-2.0-only */
2/*
3 * arch/arm64/include/asm/hugetlb.h
4 *
5 * Copyright (C) 2013 Linaro Ltd.
6 *
7 * Based on arch/x86/include/asm/hugetlb.h
8 */
9
10#ifndef __ASM_HUGETLB_H
11#define __ASM_HUGETLB_H
12
13#include <asm/page.h>
14
15#ifdef CONFIG_ARCH_ENABLE_HUGEPAGE_MIGRATION
16#define arch_hugetlb_migration_supported arch_hugetlb_migration_supported
17extern bool arch_hugetlb_migration_supported(struct hstate *h);
18#endif
19
20#define __HAVE_ARCH_HUGE_PTEP_GET
21static inline pte_t huge_ptep_get(pte_t *ptep)
22{
23 return READ_ONCE(*ptep);
24}
25
26static inline int is_hugepage_only_range(struct mm_struct *mm,
27 unsigned long addr, unsigned long len)
28{
29 return 0;
30}
31
32static inline void arch_clear_hugepage_flags(struct page *page)
33{
34 clear_bit(PG_dcache_clean, &page->flags);
35}
36
37extern pte_t arch_make_huge_pte(pte_t entry, struct vm_area_struct *vma,
38 struct page *page, int writable);
39#define arch_make_huge_pte arch_make_huge_pte
40#define __HAVE_ARCH_HUGE_SET_HUGE_PTE_AT
41extern void set_huge_pte_at(struct mm_struct *mm, unsigned long addr,
42 pte_t *ptep, pte_t pte);
43#define __HAVE_ARCH_HUGE_PTEP_SET_ACCESS_FLAGS
44extern int huge_ptep_set_access_flags(struct vm_area_struct *vma,
45 unsigned long addr, pte_t *ptep,
46 pte_t pte, int dirty);
47#define __HAVE_ARCH_HUGE_PTEP_GET_AND_CLEAR
48extern pte_t huge_ptep_get_and_clear(struct mm_struct *mm,
49 unsigned long addr, pte_t *ptep);
50#define __HAVE_ARCH_HUGE_PTEP_SET_WRPROTECT
51extern void huge_ptep_set_wrprotect(struct mm_struct *mm,
52 unsigned long addr, pte_t *ptep);
53#define __HAVE_ARCH_HUGE_PTEP_CLEAR_FLUSH
54extern void huge_ptep_clear_flush(struct vm_area_struct *vma,
55 unsigned long addr, pte_t *ptep);
56#define __HAVE_ARCH_HUGE_PTE_CLEAR
57extern void huge_pte_clear(struct mm_struct *mm, unsigned long addr,
58 pte_t *ptep, unsigned long sz);
59extern void set_huge_swap_pte_at(struct mm_struct *mm, unsigned long addr,
60 pte_t *ptep, pte_t pte, unsigned long sz);
61#define set_huge_swap_pte_at set_huge_swap_pte_at
62
63#include <asm-generic/hugetlb.h>
64
65#endif /* __ASM_HUGETLB_H */