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 pte_t huge_pte_wrprotect(pte_t pte) 32 { 33 return pte_wrprotect(pte); 34 } 35 36 static inline void huge_ptep_set_wrprotect(struct mm_struct *mm, 37 unsigned long addr, pte_t *ptep) 38 { 39 ptep_set_wrprotect(mm, addr, ptep); 40 } 41 42 static inline int huge_ptep_set_access_flags(struct vm_area_struct *vma, 43 unsigned long addr, pte_t *ptep, 44 pte_t pte, int dirty) 45 { 46 return ptep_set_access_flags(vma, addr, ptep, pte, dirty); 47 } 48 49 static inline pte_t huge_ptep_get(pte_t *ptep) 50 { 51 return *ptep; 52 } 53 54 static inline void arch_clear_hugepage_flags(struct page *page) 55 { 56 } 57 58 #ifdef CONFIG_ARCH_HAS_GIGANTIC_PAGE 59 static inline bool gigantic_page_supported(void) { return true; } 60 #endif 61 62 #endif /* _ASM_X86_HUGETLB_H */ 63