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 17 extern bool arch_hugetlb_migration_supported(struct hstate *h); 18 #endif 19 20 #define __HAVE_ARCH_HUGE_PTEP_GET 21 static inline pte_t huge_ptep_get(pte_t *ptep) 22 { 23 return READ_ONCE(*ptep); 24 } 25 26 static inline int is_hugepage_only_range(struct mm_struct *mm, 27 unsigned long addr, unsigned long len) 28 { 29 return 0; 30 } 31 32 static inline void arch_clear_hugepage_flags(struct page *page) 33 { 34 clear_bit(PG_dcache_clean, &page->flags); 35 } 36 37 extern 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 41 extern 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 44 extern 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 48 extern 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 51 extern void huge_ptep_set_wrprotect(struct mm_struct *mm, 52 unsigned long addr, pte_t *ptep); 53 #define __HAVE_ARCH_HUGE_PTEP_CLEAR_FLUSH 54 extern void huge_ptep_clear_flush(struct vm_area_struct *vma, 55 unsigned long addr, pte_t *ptep); 56 #define __HAVE_ARCH_HUGE_PTE_CLEAR 57 extern void huge_pte_clear(struct mm_struct *mm, unsigned long addr, 58 pte_t *ptep, unsigned long sz); 59 extern 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 */ 66