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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
20static inline void arch_clear_hugepage_flags(struct page *page)
21{
22 clear_bit(PG_dcache_clean, &page->flags);
23}
24#define arch_clear_hugepage_flags arch_clear_hugepage_flags
25
26pte_t arch_make_huge_pte(pte_t entry, unsigned int shift, vm_flags_t flags);
27#define arch_make_huge_pte arch_make_huge_pte
28#define __HAVE_ARCH_HUGE_SET_HUGE_PTE_AT
29extern void set_huge_pte_at(struct mm_struct *mm, unsigned long addr,
30 pte_t *ptep, pte_t pte);
31#define __HAVE_ARCH_HUGE_PTEP_SET_ACCESS_FLAGS
32extern int huge_ptep_set_access_flags(struct vm_area_struct *vma,
33 unsigned long addr, pte_t *ptep,
34 pte_t pte, int dirty);
35#define __HAVE_ARCH_HUGE_PTEP_GET_AND_CLEAR
36extern pte_t huge_ptep_get_and_clear(struct mm_struct *mm,
37 unsigned long addr, pte_t *ptep);
38#define __HAVE_ARCH_HUGE_PTEP_SET_WRPROTECT
39extern void huge_ptep_set_wrprotect(struct mm_struct *mm,
40 unsigned long addr, pte_t *ptep);
41#define __HAVE_ARCH_HUGE_PTEP_CLEAR_FLUSH
42extern pte_t huge_ptep_clear_flush(struct vm_area_struct *vma,
43 unsigned long addr, pte_t *ptep);
44#define __HAVE_ARCH_HUGE_PTE_CLEAR
45extern void huge_pte_clear(struct mm_struct *mm, unsigned long addr,
46 pte_t *ptep, unsigned long sz);
47#define __HAVE_ARCH_HUGE_PTEP_GET
48extern pte_t huge_ptep_get(pte_t *ptep);
49
50void __init arm64_hugetlb_cma_reserve(void);
51
52#define huge_ptep_modify_prot_start huge_ptep_modify_prot_start
53extern pte_t huge_ptep_modify_prot_start(struct vm_area_struct *vma,
54 unsigned long addr, pte_t *ptep);
55
56#define huge_ptep_modify_prot_commit huge_ptep_modify_prot_commit
57extern void huge_ptep_modify_prot_commit(struct vm_area_struct *vma,
58 unsigned long addr, pte_t *ptep,
59 pte_t old_pte, pte_t new_pte);
60
61#include <asm-generic/hugetlb.h>
62
63#endif /* __ASM_HUGETLB_H */