44 static inline int pte_looks_normal(pte_t pte)  in pte_looks_normal()  argument
48 	if ((pte_val(pte) & (_PAGE_PRESENT | _PAGE_SPECIAL)) == _PAGE_PRESENT) {  in pte_looks_normal()
49 		if (pte_ci(pte))  in pte_looks_normal()
51 		if (pte_user(pte))  in pte_looks_normal()
56 	return (pte_val(pte) &  in pte_looks_normal()
63 static struct page *maybe_pte_to_page(pte_t pte)  in maybe_pte_to_page()  argument
65 	unsigned long pfn = pte_pfn(pte);  in maybe_pte_to_page()
84 static pte_t set_pte_filter(pte_t pte)  in set_pte_filter()  argument
87 		return pte;  in set_pte_filter()
89 	pte = __pte(pte_val(pte) & ~_PAGE_HPTEFLAGS);  in set_pte_filter()
90 	if (pte_looks_normal(pte) && !(cpu_has_feature(CPU_FTR_COHERENT_ICACHE) ||  in set_pte_filter()
92 		struct page *pg = maybe_pte_to_page(pte);  in set_pte_filter()
94 			return pte;  in set_pte_filter()
100 	return pte;  in set_pte_filter()
103 static pte_t set_access_flags_filter(pte_t pte, struct vm_area_struct *vma,  in set_access_flags_filter()  argument
106 	return pte;  in set_access_flags_filter()
115 static pte_t set_pte_filter(pte_t pte)  in set_pte_filter()  argument
120 	if (!(pte_val(pte) & _PAGE_EXEC) || !pte_looks_normal(pte))  in set_pte_filter()
121 		return pte;  in set_pte_filter()
124 	pg = maybe_pte_to_page(pte);  in set_pte_filter()
126 		return pte;  in set_pte_filter()
130 		return pte;  in set_pte_filter()
136 		return pte;  in set_pte_filter()
140 	return __pte(pte_val(pte) & ~_PAGE_EXEC);  in set_pte_filter()
143 static pte_t set_access_flags_filter(pte_t pte, struct vm_area_struct *vma,  in set_access_flags_filter()  argument
153 	if (dirty || (pte_val(pte) & _PAGE_EXEC) || !is_exec_fault())  in set_access_flags_filter()
154 		return pte;  in set_access_flags_filter()
162 		return pte;  in set_access_flags_filter()
166 	pg = maybe_pte_to_page(pte);  in set_access_flags_filter()
179 	return __pte(pte_val(pte) | _PAGE_EXEC);  in set_access_flags_filter()
188 		pte_t pte)  in set_pte_at()  argument
198 	pte = __pte(pte_val(pte) | _PAGE_PTE);  in set_pte_at()
204 	pte = set_pte_filter(pte);  in set_pte_at()
207 	__set_pte_at(mm, addr, ptep, pte, 0);  in set_pte_at()
234 				      pte_t pte, int dirty)  in huge_ptep_set_access_flags()  argument
242 	ptep_set_access_flags(vma, addr, ptep, pte, dirty);  in huge_ptep_set_access_flags()
247 	pte = set_access_flags_filter(pte, vma, dirty);  in huge_ptep_set_access_flags()
248 	changed = !pte_same(*(ptep), pte);  in huge_ptep_set_access_flags()
266 		__ptep_set_access_flags(vma, ptep, pte, addr, psize);  in huge_ptep_set_access_flags()