tjh.dev
Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
os
linux
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#define __HAVE_ARCH_HUGE_PTEP_GET
24static inline pte_t huge_ptep_get(pte_t *ptep)
25{
26 return READ_ONCE(*ptep);
27}
28
29static inline int is_hugepage_only_range(struct mm_struct *mm,
30 unsigned long addr, unsigned long len)
31{
32 return 0;
33}
34
35static inline void arch_clear_hugepage_flags(struct page *page)
36{
37 clear_bit(PG_dcache_clean, &page->flags);
38}
39
40extern pte_t arch_make_huge_pte(pte_t entry, struct vm_area_struct *vma,
41 struct page *page, int writable);
42#define arch_make_huge_pte arch_make_huge_pte
43#define __HAVE_ARCH_HUGE_SET_HUGE_PTE_AT
44extern void set_huge_pte_at(struct mm_struct *mm, unsigned long addr,
45 pte_t *ptep, pte_t pte);
46#define __HAVE_ARCH_HUGE_PTEP_SET_ACCESS_FLAGS
47extern int huge_ptep_set_access_flags(struct vm_area_struct *vma,
48 unsigned long addr, pte_t *ptep,
49 pte_t pte, int dirty);
50#define __HAVE_ARCH_HUGE_PTEP_GET_AND_CLEAR
51extern pte_t huge_ptep_get_and_clear(struct mm_struct *mm,
52 unsigned long addr, pte_t *ptep);
53#define __HAVE_ARCH_HUGE_PTEP_SET_WRPROTECT
54extern void huge_ptep_set_wrprotect(struct mm_struct *mm,
55 unsigned long addr, pte_t *ptep);
56#define __HAVE_ARCH_HUGE_PTEP_CLEAR_FLUSH
57extern void huge_ptep_clear_flush(struct vm_area_struct *vma,
58 unsigned long addr, pte_t *ptep);
59#define __HAVE_ARCH_HUGE_PTE_CLEAR
60extern void huge_pte_clear(struct mm_struct *mm, unsigned long addr,
61 pte_t *ptep, unsigned long sz);
62extern void set_huge_swap_pte_at(struct mm_struct *mm, unsigned long addr,
63 pte_t *ptep, pte_t pte, unsigned long sz);
64#define set_huge_swap_pte_at set_huge_swap_pte_at
65
66#include <asm-generic/hugetlb.h>
67
68#ifdef CONFIG_ARCH_HAS_GIGANTIC_PAGE
69static inline bool gigantic_page_supported(void) { return true; }
70#endif
71
72#endif /* __ASM_HUGETLB_H */