1 /* SPDX-License-Identifier: GPL-2.0 */ 2 #ifndef _ASM_X86_HUGETLB_H 3 #define _ASM_X86_HUGETLB_H 4 5 #include <asm/page.h> 6 #include <asm-generic/hugetlb.h> 7 8 #define hugepages_supported() boot_cpu_has(X86_FEATURE_PSE) 9 10 static inline int is_hugepage_only_range(struct mm_struct *mm, 11 unsigned long addr, 12 unsigned long len) { 13 return 0; 14 } 15 16 /* 17 * If the arch doesn't supply something else, assume that hugepage 18 * size aligned regions are ok without further preparation. 19 */ 20 static inline int prepare_hugepage_range(struct file *file, 21 unsigned long addr, unsigned long len) 22 { 23 struct hstate *h = hstate_file(file); 24 if (len & ~huge_page_mask(h)) 25 return -EINVAL; 26 if (addr & ~huge_page_mask(h)) 27 return -EINVAL; 28 return 0; 29 } 30 31 static inline void hugetlb_free_pgd_range(struct mmu_gather *tlb, 32 unsigned long addr, unsigned long end, 33 unsigned long floor, 34 unsigned long ceiling) 35 { 36 free_pgd_range(tlb, addr, end, floor, ceiling); 37 } 38 39 static inline void set_huge_pte_at(struct mm_struct *mm, unsigned long addr, 40 pte_t *ptep, pte_t pte) 41 { 42 set_pte_at(mm, addr, ptep, pte); 43 } 44 45 static inline pte_t huge_ptep_get_and_clear(struct mm_struct *mm, 46 unsigned long addr, pte_t *ptep) 47 { 48 return ptep_get_and_clear(mm, addr, ptep); 49 } 50 51 static inline void huge_ptep_clear_flush(struct vm_area_struct *vma, 52 unsigned long addr, pte_t *ptep) 53 { 54 ptep_clear_flush(vma, addr, ptep); 55 } 56 57 static inline int huge_pte_none(pte_t pte) 58 { 59 return pte_none(pte); 60 } 61 62 static inline pte_t huge_pte_wrprotect(pte_t pte) 63 { 64 return pte_wrprotect(pte); 65 } 66 67 static inline void huge_ptep_set_wrprotect(struct mm_struct *mm, 68 unsigned long addr, pte_t *ptep) 69 { 70 ptep_set_wrprotect(mm, addr, ptep); 71 } 72 73 static inline int huge_ptep_set_access_flags(struct vm_area_struct *vma, 74 unsigned long addr, pte_t *ptep, 75 pte_t pte, int dirty) 76 { 77 return ptep_set_access_flags(vma, addr, ptep, pte, dirty); 78 } 79 80 static inline pte_t huge_ptep_get(pte_t *ptep) 81 { 82 return *ptep; 83 } 84 85 static inline void arch_clear_hugepage_flags(struct page *page) 86 { 87 } 88 89 #ifdef CONFIG_ARCH_HAS_GIGANTIC_PAGE 90 static inline bool gigantic_page_supported(void) { return true; } 91 #endif 92 93 #endif /* _ASM_X86_HUGETLB_H */ 94