Lines Matching refs:vmf
2744 struct vm_fault *vmf) in cow_user_page() argument
2750 struct vm_area_struct *vma = vmf->vma; in cow_user_page()
2752 unsigned long addr = vmf->address; in cow_user_page()
2772 if (arch_faults_on_old_pte() && !pte_young(vmf->orig_pte)) { in cow_user_page()
2775 vmf->pte = pte_offset_map_lock(mm, vmf->pmd, addr, &vmf->ptl); in cow_user_page()
2777 if (!likely(pte_same(*vmf->pte, vmf->orig_pte))) { in cow_user_page()
2782 update_mmu_tlb(vma, addr, vmf->pte); in cow_user_page()
2787 entry = pte_mkyoung(vmf->orig_pte); in cow_user_page()
2788 if (ptep_set_access_flags(vma, addr, vmf->pte, entry, 0)) in cow_user_page()
2789 update_mmu_cache(vma, addr, vmf->pte); in cow_user_page()
2803 vmf->pte = pte_offset_map_lock(mm, vmf->pmd, addr, &vmf->ptl); in cow_user_page()
2805 if (!likely(pte_same(*vmf->pte, vmf->orig_pte))) { in cow_user_page()
2807 update_mmu_tlb(vma, addr, vmf->pte); in cow_user_page()
2831 pte_unmap_unlock(vmf->pte, vmf->ptl); in cow_user_page()
2858 static vm_fault_t do_page_mkwrite(struct vm_fault *vmf) in do_page_mkwrite() argument
2861 struct page *page = vmf->page; in do_page_mkwrite()
2862 unsigned int old_flags = vmf->flags; in do_page_mkwrite()
2864 vmf->flags = FAULT_FLAG_WRITE|FAULT_FLAG_MKWRITE; in do_page_mkwrite()
2866 if (vmf->vma->vm_file && in do_page_mkwrite()
2867 IS_SWAPFILE(vmf->vma->vm_file->f_mapping->host)) in do_page_mkwrite()
2870 ret = vmf->vma->vm_ops->page_mkwrite(vmf); in do_page_mkwrite()
2872 vmf->flags = old_flags; in do_page_mkwrite()
2892 static vm_fault_t fault_dirty_shared_page(struct vm_fault *vmf) in fault_dirty_shared_page() argument
2894 struct vm_area_struct *vma = vmf->vma; in fault_dirty_shared_page()
2896 struct page *page = vmf->page; in fault_dirty_shared_page()
2926 fpin = maybe_unlock_mmap_for_io(vmf, NULL); in fault_dirty_shared_page()
2945 static inline void wp_page_reuse(struct vm_fault *vmf) in wp_page_reuse() argument
2946 __releases(vmf->ptl) in wp_page_reuse()
2948 struct vm_area_struct *vma = vmf->vma; in wp_page_reuse()
2949 struct page *page = vmf->page; in wp_page_reuse()
2959 flush_cache_page(vma, vmf->address, pte_pfn(vmf->orig_pte)); in wp_page_reuse()
2960 entry = pte_mkyoung(vmf->orig_pte); in wp_page_reuse()
2962 if (ptep_set_access_flags(vma, vmf->address, vmf->pte, entry, 1)) in wp_page_reuse()
2963 update_mmu_cache(vma, vmf->address, vmf->pte); in wp_page_reuse()
2964 pte_unmap_unlock(vmf->pte, vmf->ptl); in wp_page_reuse()
2984 static vm_fault_t wp_page_copy(struct vm_fault *vmf) in wp_page_copy() argument
2986 struct vm_area_struct *vma = vmf->vma; in wp_page_copy()
2988 struct page *old_page = vmf->page; in wp_page_copy()
2997 if (is_zero_pfn(pte_pfn(vmf->orig_pte))) { in wp_page_copy()
2999 vmf->address); in wp_page_copy()
3004 vmf->address); in wp_page_copy()
3008 if (!cow_user_page(new_page, old_page, vmf)) { in wp_page_copy()
3029 vmf->address & PAGE_MASK, in wp_page_copy()
3030 (vmf->address & PAGE_MASK) + PAGE_SIZE); in wp_page_copy()
3036 vmf->pte = pte_offset_map_lock(mm, vmf->pmd, vmf->address, &vmf->ptl); in wp_page_copy()
3037 if (likely(pte_same(*vmf->pte, vmf->orig_pte))) { in wp_page_copy()
3047 flush_cache_page(vma, vmf->address, pte_pfn(vmf->orig_pte)); in wp_page_copy()
3059 ptep_clear_flush_notify(vma, vmf->address, vmf->pte); in wp_page_copy()
3060 page_add_new_anon_rmap(new_page, vma, vmf->address, false); in wp_page_copy()
3067 set_pte_at_notify(mm, vmf->address, vmf->pte, entry); in wp_page_copy()
3068 update_mmu_cache(vma, vmf->address, vmf->pte); in wp_page_copy()
3099 update_mmu_tlb(vma, vmf->address, vmf->pte); in wp_page_copy()
3105 pte_unmap_unlock(vmf->pte, vmf->ptl); in wp_page_copy()
3151 vm_fault_t finish_mkwrite_fault(struct vm_fault *vmf) in finish_mkwrite_fault() argument
3153 WARN_ON_ONCE(!(vmf->vma->vm_flags & VM_SHARED)); in finish_mkwrite_fault()
3154 vmf->pte = pte_offset_map_lock(vmf->vma->vm_mm, vmf->pmd, vmf->address, in finish_mkwrite_fault()
3155 &vmf->ptl); in finish_mkwrite_fault()
3160 if (!pte_same(*vmf->pte, vmf->orig_pte)) { in finish_mkwrite_fault()
3161 update_mmu_tlb(vmf->vma, vmf->address, vmf->pte); in finish_mkwrite_fault()
3162 pte_unmap_unlock(vmf->pte, vmf->ptl); in finish_mkwrite_fault()
3165 wp_page_reuse(vmf); in finish_mkwrite_fault()
3173 static vm_fault_t wp_pfn_shared(struct vm_fault *vmf) in wp_pfn_shared() argument
3175 struct vm_area_struct *vma = vmf->vma; in wp_pfn_shared()
3180 pte_unmap_unlock(vmf->pte, vmf->ptl); in wp_pfn_shared()
3181 vmf->flags |= FAULT_FLAG_MKWRITE; in wp_pfn_shared()
3182 ret = vma->vm_ops->pfn_mkwrite(vmf); in wp_pfn_shared()
3185 return finish_mkwrite_fault(vmf); in wp_pfn_shared()
3187 wp_page_reuse(vmf); in wp_pfn_shared()
3191 static vm_fault_t wp_page_shared(struct vm_fault *vmf) in wp_page_shared() argument
3192 __releases(vmf->ptl) in wp_page_shared()
3194 struct vm_area_struct *vma = vmf->vma; in wp_page_shared()
3197 get_page(vmf->page); in wp_page_shared()
3202 pte_unmap_unlock(vmf->pte, vmf->ptl); in wp_page_shared()
3203 tmp = do_page_mkwrite(vmf); in wp_page_shared()
3206 put_page(vmf->page); in wp_page_shared()
3209 tmp = finish_mkwrite_fault(vmf); in wp_page_shared()
3211 unlock_page(vmf->page); in wp_page_shared()
3212 put_page(vmf->page); in wp_page_shared()
3216 wp_page_reuse(vmf); in wp_page_shared()
3217 lock_page(vmf->page); in wp_page_shared()
3219 ret |= fault_dirty_shared_page(vmf); in wp_page_shared()
3220 put_page(vmf->page); in wp_page_shared()
3243 static vm_fault_t do_wp_page(struct vm_fault *vmf) in do_wp_page() argument
3244 __releases(vmf->ptl) in do_wp_page()
3246 struct vm_area_struct *vma = vmf->vma; in do_wp_page()
3248 if (userfaultfd_pte_wp(vma, *vmf->pte)) { in do_wp_page()
3249 pte_unmap_unlock(vmf->pte, vmf->ptl); in do_wp_page()
3250 return handle_userfault(vmf, VM_UFFD_WP); in do_wp_page()
3257 if (unlikely(userfaultfd_wp(vmf->vma) && in do_wp_page()
3258 mm_tlb_flush_pending(vmf->vma->vm_mm))) in do_wp_page()
3259 flush_tlb_page(vmf->vma, vmf->address); in do_wp_page()
3261 vmf->page = vm_normal_page(vma, vmf->address, vmf->orig_pte); in do_wp_page()
3262 if (!vmf->page) { in do_wp_page()
3272 return wp_pfn_shared(vmf); in do_wp_page()
3274 pte_unmap_unlock(vmf->pte, vmf->ptl); in do_wp_page()
3275 return wp_page_copy(vmf); in do_wp_page()
3282 if (PageAnon(vmf->page)) { in do_wp_page()
3283 struct page *page = vmf->page; in do_wp_page()
3300 wp_page_reuse(vmf); in do_wp_page()
3304 return wp_page_shared(vmf); in do_wp_page()
3310 get_page(vmf->page); in do_wp_page()
3312 pte_unmap_unlock(vmf->pte, vmf->ptl); in do_wp_page()
3313 return wp_page_copy(vmf); in do_wp_page()
3446 static vm_fault_t remove_device_exclusive_entry(struct vm_fault *vmf) in remove_device_exclusive_entry() argument
3448 struct page *page = vmf->page; in remove_device_exclusive_entry()
3449 struct vm_area_struct *vma = vmf->vma; in remove_device_exclusive_entry()
3452 if (!lock_page_or_retry(page, vma->vm_mm, vmf->flags)) in remove_device_exclusive_entry()
3455 vma->vm_mm, vmf->address & PAGE_MASK, in remove_device_exclusive_entry()
3456 (vmf->address & PAGE_MASK) + PAGE_SIZE, NULL); in remove_device_exclusive_entry()
3459 vmf->pte = pte_offset_map_lock(vma->vm_mm, vmf->pmd, vmf->address, in remove_device_exclusive_entry()
3460 &vmf->ptl); in remove_device_exclusive_entry()
3461 if (likely(pte_same(*vmf->pte, vmf->orig_pte))) in remove_device_exclusive_entry()
3462 restore_exclusive_pte(vma, page, vmf->address, vmf->pte); in remove_device_exclusive_entry()
3464 pte_unmap_unlock(vmf->pte, vmf->ptl); in remove_device_exclusive_entry()
3479 vm_fault_t do_swap_page(struct vm_fault *vmf) in do_swap_page() argument
3481 struct vm_area_struct *vma = vmf->vma; in do_swap_page()
3491 if (!pte_unmap_same(vma->vm_mm, vmf->pmd, vmf->pte, vmf->orig_pte)) in do_swap_page()
3494 entry = pte_to_swp_entry(vmf->orig_pte); in do_swap_page()
3497 migration_entry_wait(vma->vm_mm, vmf->pmd, in do_swap_page()
3498 vmf->address); in do_swap_page()
3500 vmf->page = pfn_swap_entry_to_page(entry); in do_swap_page()
3501 ret = remove_device_exclusive_entry(vmf); in do_swap_page()
3503 vmf->page = pfn_swap_entry_to_page(entry); in do_swap_page()
3504 ret = vmf->page->pgmap->ops->migrate_to_ram(vmf); in do_swap_page()
3508 print_bad_pte(vma, vmf->address, vmf->orig_pte, NULL); in do_swap_page()
3520 page = lookup_swap_cache(entry, vma, vmf->address); in do_swap_page()
3528 vmf->address); in do_swap_page()
3553 vmf); in do_swap_page()
3562 vmf->pte = pte_offset_map_lock(vma->vm_mm, vmf->pmd, in do_swap_page()
3563 vmf->address, &vmf->ptl); in do_swap_page()
3564 if (likely(pte_same(*vmf->pte, vmf->orig_pte))) in do_swap_page()
3584 locked = lock_page_or_retry(page, vma->vm_mm, vmf->flags); in do_swap_page()
3602 page = ksm_might_need_to_copy(page, vma, vmf->address); in do_swap_page()
3614 vmf->pte = pte_offset_map_lock(vma->vm_mm, vmf->pmd, vmf->address, in do_swap_page()
3615 &vmf->ptl); in do_swap_page()
3616 if (unlikely(!pte_same(*vmf->pte, vmf->orig_pte))) in do_swap_page()
3637 if ((vmf->flags & FAULT_FLAG_WRITE) && reuse_swap_page(page, NULL)) { in do_swap_page()
3639 vmf->flags &= ~FAULT_FLAG_WRITE; in do_swap_page()
3644 if (pte_swp_soft_dirty(vmf->orig_pte)) in do_swap_page()
3646 if (pte_swp_uffd_wp(vmf->orig_pte)) { in do_swap_page()
3650 set_pte_at(vma->vm_mm, vmf->address, vmf->pte, pte); in do_swap_page()
3651 arch_do_swap_page(vma->vm_mm, vma, vmf->address, pte, vmf->orig_pte); in do_swap_page()
3652 vmf->orig_pte = pte; in do_swap_page()
3656 page_add_new_anon_rmap(page, vma, vmf->address, false); in do_swap_page()
3659 do_page_add_anon_rmap(page, vma, vmf->address, exclusive); in do_swap_page()
3680 if (vmf->flags & FAULT_FLAG_WRITE) { in do_swap_page()
3681 ret |= do_wp_page(vmf); in do_swap_page()
3688 update_mmu_cache(vma, vmf->address, vmf->pte); in do_swap_page()
3690 pte_unmap_unlock(vmf->pte, vmf->ptl); in do_swap_page()
3696 pte_unmap_unlock(vmf->pte, vmf->ptl); in do_swap_page()
3715 static vm_fault_t do_anonymous_page(struct vm_fault *vmf) in do_anonymous_page() argument
3717 struct vm_area_struct *vma = vmf->vma; in do_anonymous_page()
3736 if (pte_alloc(vma->vm_mm, vmf->pmd)) in do_anonymous_page()
3740 if (unlikely(pmd_trans_unstable(vmf->pmd))) in do_anonymous_page()
3744 if (!(vmf->flags & FAULT_FLAG_WRITE) && in do_anonymous_page()
3746 entry = pte_mkspecial(pfn_pte(my_zero_pfn(vmf->address), in do_anonymous_page()
3748 vmf->pte = pte_offset_map_lock(vma->vm_mm, vmf->pmd, in do_anonymous_page()
3749 vmf->address, &vmf->ptl); in do_anonymous_page()
3750 if (!pte_none(*vmf->pte)) { in do_anonymous_page()
3751 update_mmu_tlb(vma, vmf->address, vmf->pte); in do_anonymous_page()
3759 pte_unmap_unlock(vmf->pte, vmf->ptl); in do_anonymous_page()
3760 return handle_userfault(vmf, VM_UFFD_MISSING); in do_anonymous_page()
3768 page = alloc_zeroed_user_highpage_movable(vma, vmf->address); in do_anonymous_page()
3788 vmf->pte = pte_offset_map_lock(vma->vm_mm, vmf->pmd, vmf->address, in do_anonymous_page()
3789 &vmf->ptl); in do_anonymous_page()
3790 if (!pte_none(*vmf->pte)) { in do_anonymous_page()
3791 update_mmu_cache(vma, vmf->address, vmf->pte); in do_anonymous_page()
3801 pte_unmap_unlock(vmf->pte, vmf->ptl); in do_anonymous_page()
3803 return handle_userfault(vmf, VM_UFFD_MISSING); in do_anonymous_page()
3807 page_add_new_anon_rmap(page, vma, vmf->address, false); in do_anonymous_page()
3810 set_pte_at(vma->vm_mm, vmf->address, vmf->pte, entry); in do_anonymous_page()
3813 update_mmu_cache(vma, vmf->address, vmf->pte); in do_anonymous_page()
3815 pte_unmap_unlock(vmf->pte, vmf->ptl); in do_anonymous_page()
3831 static vm_fault_t __do_fault(struct vm_fault *vmf) in __do_fault() argument
3833 struct vm_area_struct *vma = vmf->vma; in __do_fault()
3851 if (pmd_none(*vmf->pmd) && !vmf->prealloc_pte) { in __do_fault()
3852 vmf->prealloc_pte = pte_alloc_one(vma->vm_mm); in __do_fault()
3853 if (!vmf->prealloc_pte) in __do_fault()
3858 ret = vma->vm_ops->fault(vmf); in __do_fault()
3863 if (unlikely(PageHWPoison(vmf->page))) { in __do_fault()
3865 unlock_page(vmf->page); in __do_fault()
3866 put_page(vmf->page); in __do_fault()
3867 vmf->page = NULL; in __do_fault()
3872 lock_page(vmf->page); in __do_fault()
3874 VM_BUG_ON_PAGE(!PageLocked(vmf->page), vmf->page); in __do_fault()
3880 static void deposit_prealloc_pte(struct vm_fault *vmf) in deposit_prealloc_pte() argument
3882 struct vm_area_struct *vma = vmf->vma; in deposit_prealloc_pte()
3884 pgtable_trans_huge_deposit(vma->vm_mm, vmf->pmd, vmf->prealloc_pte); in deposit_prealloc_pte()
3890 vmf->prealloc_pte = NULL; in deposit_prealloc_pte()
3893 vm_fault_t do_set_pmd(struct vm_fault *vmf, struct page *page) in do_set_pmd() argument
3895 struct vm_area_struct *vma = vmf->vma; in do_set_pmd()
3896 bool write = vmf->flags & FAULT_FLAG_WRITE; in do_set_pmd()
3897 unsigned long haddr = vmf->address & HPAGE_PMD_MASK; in do_set_pmd()
3922 if (arch_needs_pgtable_deposit() && !vmf->prealloc_pte) { in do_set_pmd()
3923 vmf->prealloc_pte = pte_alloc_one(vma->vm_mm); in do_set_pmd()
3924 if (!vmf->prealloc_pte) in do_set_pmd()
3929 vmf->ptl = pmd_lock(vma->vm_mm, vmf->pmd); in do_set_pmd()
3930 if (unlikely(!pmd_none(*vmf->pmd))) in do_set_pmd()
3946 deposit_prealloc_pte(vmf); in do_set_pmd()
3948 set_pmd_at(vma->vm_mm, haddr, vmf->pmd, entry); in do_set_pmd()
3950 update_mmu_cache_pmd(vma, haddr, vmf->pmd); in do_set_pmd()
3956 spin_unlock(vmf->ptl); in do_set_pmd()
3960 vm_fault_t do_set_pmd(struct vm_fault *vmf, struct page *page) in do_set_pmd() argument
3966 void do_set_pte(struct vm_fault *vmf, struct page *page, unsigned long addr) in do_set_pte() argument
3968 struct vm_area_struct *vma = vmf->vma; in do_set_pte()
3969 bool write = vmf->flags & FAULT_FLAG_WRITE; in do_set_pte()
3970 bool prefault = vmf->address != addr; in do_set_pte()
3992 set_pte_at(vma->vm_mm, addr, vmf->pte, entry); in do_set_pte()
4010 vm_fault_t finish_fault(struct vm_fault *vmf) in finish_fault() argument
4012 struct vm_area_struct *vma = vmf->vma; in finish_fault()
4017 if ((vmf->flags & FAULT_FLAG_WRITE) && !(vma->vm_flags & VM_SHARED)) in finish_fault()
4018 page = vmf->cow_page; in finish_fault()
4020 page = vmf->page; in finish_fault()
4032 if (pmd_none(*vmf->pmd)) { in finish_fault()
4034 ret = do_set_pmd(vmf, page); in finish_fault()
4039 if (vmf->prealloc_pte) { in finish_fault()
4040 vmf->ptl = pmd_lock(vma->vm_mm, vmf->pmd); in finish_fault()
4041 if (likely(pmd_none(*vmf->pmd))) { in finish_fault()
4043 pmd_populate(vma->vm_mm, vmf->pmd, vmf->prealloc_pte); in finish_fault()
4044 vmf->prealloc_pte = NULL; in finish_fault()
4046 spin_unlock(vmf->ptl); in finish_fault()
4047 } else if (unlikely(pte_alloc(vma->vm_mm, vmf->pmd))) { in finish_fault()
4053 if (pmd_devmap_trans_unstable(vmf->pmd)) in finish_fault()
4056 vmf->pte = pte_offset_map_lock(vma->vm_mm, vmf->pmd, in finish_fault()
4057 vmf->address, &vmf->ptl); in finish_fault()
4060 if (likely(pte_none(*vmf->pte))) in finish_fault()
4061 do_set_pte(vmf, page, vmf->address); in finish_fault()
4065 update_mmu_tlb(vma, vmf->address, vmf->pte); in finish_fault()
4066 pte_unmap_unlock(vmf->pte, vmf->ptl); in finish_fault()
4130 static vm_fault_t do_fault_around(struct vm_fault *vmf) in do_fault_around() argument
4132 unsigned long address = vmf->address, nr_pages, mask; in do_fault_around()
4133 pgoff_t start_pgoff = vmf->pgoff; in do_fault_around()
4140 address = max(address & mask, vmf->vma->vm_start); in do_fault_around()
4141 off = ((vmf->address - address) >> PAGE_SHIFT) & (PTRS_PER_PTE - 1); in do_fault_around()
4151 end_pgoff = min3(end_pgoff, vma_pages(vmf->vma) + vmf->vma->vm_pgoff - 1, in do_fault_around()
4154 if (pmd_none(*vmf->pmd)) { in do_fault_around()
4155 vmf->prealloc_pte = pte_alloc_one(vmf->vma->vm_mm); in do_fault_around()
4156 if (!vmf->prealloc_pte) in do_fault_around()
4161 return vmf->vma->vm_ops->map_pages(vmf, start_pgoff, end_pgoff); in do_fault_around()
4164 static vm_fault_t do_read_fault(struct vm_fault *vmf) in do_read_fault() argument
4166 struct vm_area_struct *vma = vmf->vma; in do_read_fault()
4175 if (likely(!userfaultfd_minor(vmf->vma))) { in do_read_fault()
4176 ret = do_fault_around(vmf); in do_read_fault()
4182 ret = __do_fault(vmf); in do_read_fault()
4186 ret |= finish_fault(vmf); in do_read_fault()
4187 unlock_page(vmf->page); in do_read_fault()
4189 put_page(vmf->page); in do_read_fault()
4193 static vm_fault_t do_cow_fault(struct vm_fault *vmf) in do_cow_fault() argument
4195 struct vm_area_struct *vma = vmf->vma; in do_cow_fault()
4201 vmf->cow_page = alloc_page_vma(GFP_HIGHUSER_MOVABLE, vma, vmf->address); in do_cow_fault()
4202 if (!vmf->cow_page) in do_cow_fault()
4205 if (mem_cgroup_charge(vmf->cow_page, vma->vm_mm, GFP_KERNEL)) { in do_cow_fault()
4206 put_page(vmf->cow_page); in do_cow_fault()
4209 cgroup_throttle_swaprate(vmf->cow_page, GFP_KERNEL); in do_cow_fault()
4211 ret = __do_fault(vmf); in do_cow_fault()
4217 copy_user_highpage(vmf->cow_page, vmf->page, vmf->address, vma); in do_cow_fault()
4218 __SetPageUptodate(vmf->cow_page); in do_cow_fault()
4220 ret |= finish_fault(vmf); in do_cow_fault()
4221 unlock_page(vmf->page); in do_cow_fault()
4222 put_page(vmf->page); in do_cow_fault()
4227 put_page(vmf->cow_page); in do_cow_fault()
4231 static vm_fault_t do_shared_fault(struct vm_fault *vmf) in do_shared_fault() argument
4233 struct vm_area_struct *vma = vmf->vma; in do_shared_fault()
4236 ret = __do_fault(vmf); in do_shared_fault()
4245 unlock_page(vmf->page); in do_shared_fault()
4246 tmp = do_page_mkwrite(vmf); in do_shared_fault()
4249 put_page(vmf->page); in do_shared_fault()
4254 ret |= finish_fault(vmf); in do_shared_fault()
4257 unlock_page(vmf->page); in do_shared_fault()
4258 put_page(vmf->page); in do_shared_fault()
4262 ret |= fault_dirty_shared_page(vmf); in do_shared_fault()
4274 static vm_fault_t do_fault(struct vm_fault *vmf) in do_fault() argument
4276 struct vm_area_struct *vma = vmf->vma; in do_fault()
4288 if (unlikely(!pmd_present(*vmf->pmd))) in do_fault()
4291 vmf->pte = pte_offset_map_lock(vmf->vma->vm_mm, in do_fault()
4292 vmf->pmd, in do_fault()
4293 vmf->address, in do_fault()
4294 &vmf->ptl); in do_fault()
4302 if (unlikely(pte_none(*vmf->pte))) in do_fault()
4307 pte_unmap_unlock(vmf->pte, vmf->ptl); in do_fault()
4309 } else if (!(vmf->flags & FAULT_FLAG_WRITE)) in do_fault()
4310 ret = do_read_fault(vmf); in do_fault()
4312 ret = do_cow_fault(vmf); in do_fault()
4314 ret = do_shared_fault(vmf); in do_fault()
4317 if (vmf->prealloc_pte) { in do_fault()
4318 pte_free(vm_mm, vmf->prealloc_pte); in do_fault()
4319 vmf->prealloc_pte = NULL; in do_fault()
4338 static vm_fault_t do_numa_page(struct vm_fault *vmf) in do_numa_page() argument
4340 struct vm_area_struct *vma = vmf->vma; in do_numa_page()
4346 bool was_writable = pte_savedwrite(vmf->orig_pte); in do_numa_page()
4354 vmf->ptl = pte_lockptr(vma->vm_mm, vmf->pmd); in do_numa_page()
4355 spin_lock(vmf->ptl); in do_numa_page()
4356 if (unlikely(!pte_same(*vmf->pte, vmf->orig_pte))) { in do_numa_page()
4357 pte_unmap_unlock(vmf->pte, vmf->ptl); in do_numa_page()
4362 old_pte = ptep_get(vmf->pte); in do_numa_page()
4365 page = vm_normal_page(vma, vmf->address, pte); in do_numa_page()
4393 target_nid = numa_migrate_prep(page, vma, vmf->address, page_nid, in do_numa_page()
4399 pte_unmap_unlock(vmf->pte, vmf->ptl); in do_numa_page()
4407 vmf->pte = pte_offset_map(vmf->pmd, vmf->address); in do_numa_page()
4408 spin_lock(vmf->ptl); in do_numa_page()
4409 if (unlikely(!pte_same(*vmf->pte, vmf->orig_pte))) { in do_numa_page()
4410 pte_unmap_unlock(vmf->pte, vmf->ptl); in do_numa_page()
4425 old_pte = ptep_modify_prot_start(vma, vmf->address, vmf->pte); in do_numa_page()
4430 ptep_modify_prot_commit(vma, vmf->address, vmf->pte, old_pte, pte); in do_numa_page()
4431 update_mmu_cache(vma, vmf->address, vmf->pte); in do_numa_page()
4432 pte_unmap_unlock(vmf->pte, vmf->ptl); in do_numa_page()
4436 static inline vm_fault_t create_huge_pmd(struct vm_fault *vmf) in create_huge_pmd() argument
4438 if (vma_is_anonymous(vmf->vma)) in create_huge_pmd()
4439 return do_huge_pmd_anonymous_page(vmf); in create_huge_pmd()
4440 if (vmf->vma->vm_ops->huge_fault) in create_huge_pmd()
4441 return vmf->vma->vm_ops->huge_fault(vmf, PE_SIZE_PMD); in create_huge_pmd()
4446 static inline vm_fault_t wp_huge_pmd(struct vm_fault *vmf) in wp_huge_pmd() argument
4448 if (vma_is_anonymous(vmf->vma)) { in wp_huge_pmd()
4449 if (userfaultfd_huge_pmd_wp(vmf->vma, vmf->orig_pmd)) in wp_huge_pmd()
4450 return handle_userfault(vmf, VM_UFFD_WP); in wp_huge_pmd()
4451 return do_huge_pmd_wp_page(vmf); in wp_huge_pmd()
4453 if (vmf->vma->vm_ops->huge_fault) { in wp_huge_pmd()
4454 vm_fault_t ret = vmf->vma->vm_ops->huge_fault(vmf, PE_SIZE_PMD); in wp_huge_pmd()
4461 __split_huge_pmd(vmf->vma, vmf->pmd, vmf->address, false, NULL); in wp_huge_pmd()
4466 static vm_fault_t create_huge_pud(struct vm_fault *vmf) in create_huge_pud() argument
4471 if (vma_is_anonymous(vmf->vma)) in create_huge_pud()
4473 if (vmf->vma->vm_ops->huge_fault) { in create_huge_pud()
4474 vm_fault_t ret = vmf->vma->vm_ops->huge_fault(vmf, PE_SIZE_PUD); in create_huge_pud()
4481 __split_huge_pud(vmf->vma, vmf->pud, vmf->address); in create_huge_pud()
4486 static vm_fault_t wp_huge_pud(struct vm_fault *vmf, pud_t orig_pud) in wp_huge_pud() argument
4490 if (vma_is_anonymous(vmf->vma)) in wp_huge_pud()
4492 if (vmf->vma->vm_ops->huge_fault) in wp_huge_pud()
4493 return vmf->vma->vm_ops->huge_fault(vmf, PE_SIZE_PUD); in wp_huge_pud()
4513 static vm_fault_t handle_pte_fault(struct vm_fault *vmf) in handle_pte_fault() argument
4517 if (unlikely(pmd_none(*vmf->pmd))) { in handle_pte_fault()
4524 vmf->pte = NULL; in handle_pte_fault()
4538 if (pmd_devmap_trans_unstable(vmf->pmd)) in handle_pte_fault()
4546 vmf->pte = pte_offset_map(vmf->pmd, vmf->address); in handle_pte_fault()
4547 vmf->orig_pte = *vmf->pte; in handle_pte_fault()
4558 if (pte_none(vmf->orig_pte)) { in handle_pte_fault()
4559 pte_unmap(vmf->pte); in handle_pte_fault()
4560 vmf->pte = NULL; in handle_pte_fault()
4564 if (!vmf->pte) { in handle_pte_fault()
4565 if (vma_is_anonymous(vmf->vma)) in handle_pte_fault()
4566 return do_anonymous_page(vmf); in handle_pte_fault()
4568 return do_fault(vmf); in handle_pte_fault()
4571 if (!pte_present(vmf->orig_pte)) in handle_pte_fault()
4572 return do_swap_page(vmf); in handle_pte_fault()
4574 if (pte_protnone(vmf->orig_pte) && vma_is_accessible(vmf->vma)) in handle_pte_fault()
4575 return do_numa_page(vmf); in handle_pte_fault()
4577 vmf->ptl = pte_lockptr(vmf->vma->vm_mm, vmf->pmd); in handle_pte_fault()
4578 spin_lock(vmf->ptl); in handle_pte_fault()
4579 entry = vmf->orig_pte; in handle_pte_fault()
4580 if (unlikely(!pte_same(*vmf->pte, entry))) { in handle_pte_fault()
4581 update_mmu_tlb(vmf->vma, vmf->address, vmf->pte); in handle_pte_fault()
4584 if (vmf->flags & FAULT_FLAG_WRITE) { in handle_pte_fault()
4586 return do_wp_page(vmf); in handle_pte_fault()
4590 if (ptep_set_access_flags(vmf->vma, vmf->address, vmf->pte, entry, in handle_pte_fault()
4591 vmf->flags & FAULT_FLAG_WRITE)) { in handle_pte_fault()
4592 update_mmu_cache(vmf->vma, vmf->address, vmf->pte); in handle_pte_fault()
4595 if (vmf->flags & FAULT_FLAG_TRIED) in handle_pte_fault()
4603 if (vmf->flags & FAULT_FLAG_WRITE) in handle_pte_fault()
4604 flush_tlb_fix_spurious_fault(vmf->vma, vmf->address); in handle_pte_fault()
4607 pte_unmap_unlock(vmf->pte, vmf->ptl); in handle_pte_fault()
4620 struct vm_fault vmf = { in __handle_mm_fault() local
4638 vmf.pud = pud_alloc(mm, p4d, address); in __handle_mm_fault()
4639 if (!vmf.pud) in __handle_mm_fault()
4642 if (pud_none(*vmf.pud) && __transparent_hugepage_enabled(vma)) { in __handle_mm_fault()
4643 ret = create_huge_pud(&vmf); in __handle_mm_fault()
4647 pud_t orig_pud = *vmf.pud; in __handle_mm_fault()
4655 ret = wp_huge_pud(&vmf, orig_pud); in __handle_mm_fault()
4659 huge_pud_set_accessed(&vmf, orig_pud); in __handle_mm_fault()
4665 vmf.pmd = pmd_alloc(mm, vmf.pud, address); in __handle_mm_fault()
4666 if (!vmf.pmd) in __handle_mm_fault()
4670 if (pud_trans_unstable(vmf.pud)) in __handle_mm_fault()
4673 if (pmd_none(*vmf.pmd) && __transparent_hugepage_enabled(vma)) { in __handle_mm_fault()
4674 ret = create_huge_pmd(&vmf); in __handle_mm_fault()
4678 vmf.orig_pmd = *vmf.pmd; in __handle_mm_fault()
4681 if (unlikely(is_swap_pmd(vmf.orig_pmd))) { in __handle_mm_fault()
4683 !is_pmd_migration_entry(vmf.orig_pmd)); in __handle_mm_fault()
4684 if (is_pmd_migration_entry(vmf.orig_pmd)) in __handle_mm_fault()
4685 pmd_migration_entry_wait(mm, vmf.pmd); in __handle_mm_fault()
4688 if (pmd_trans_huge(vmf.orig_pmd) || pmd_devmap(vmf.orig_pmd)) { in __handle_mm_fault()
4689 if (pmd_protnone(vmf.orig_pmd) && vma_is_accessible(vma)) in __handle_mm_fault()
4690 return do_huge_pmd_numa_page(&vmf); in __handle_mm_fault()
4692 if (dirty && !pmd_write(vmf.orig_pmd)) { in __handle_mm_fault()
4693 ret = wp_huge_pmd(&vmf); in __handle_mm_fault()
4697 huge_pmd_set_accessed(&vmf); in __handle_mm_fault()
4703 return handle_pte_fault(&vmf); in __handle_mm_fault()