From 81e0f15f2ef6dad7ccb9c03d8e61ef7ded836b38 Mon Sep 17 00:00:00 2001 From: Peter Xu Date: Thu, 12 May 2022 20:22:56 -0700 Subject: [PATCH] mm: enable PTE markers by default Enable PTE markers by default. On x86_64 it means it'll auto-enable PTE_MARKER_UFFD_WP as well. [peterx@redhat.com: hide PTE_MARKER option] Link: https://lkml.kernel.org/r/20220419202531.27415-1-peterx@redhat.com Link: https://lkml.kernel.org/r/20220405014929.15158-1-peterx@redhat.com Signed-off-by: Peter Xu Cc: Alistair Popple Cc: Andrea Arcangeli Cc: Axel Rasmussen Cc: David Hildenbrand Cc: Hugh Dickins Cc: Jerome Glisse Cc: "Kirill A . Shutemov" Cc: Matthew Wilcox Cc: Mike Kravetz Cc: Mike Rapoport Cc: Nadav Amit Signed-off-by: Andrew Morton --- mm/Kconfig | 8 +++++--- 1 file changed, 5 insertions(+), 3 deletions(-) diff --git a/mm/Kconfig b/mm/Kconfig index 71c653260a44..fd6c9fe4b6ed 100644 --- a/mm/Kconfig +++ b/mm/Kconfig @@ -910,14 +910,16 @@ config ANON_VMA_NAME difference in their name. config PTE_MARKER - bool "Marker PTEs support" + bool help Allows to create marker PTEs for file-backed memory. config PTE_MARKER_UFFD_WP - bool "Marker PTEs support for userfaultfd write protection" - depends on PTE_MARKER && HAVE_ARCH_USERFAULTFD_WP + bool "Userfaultfd write protection support for shmem/hugetlbfs" + default y + depends on HAVE_ARCH_USERFAULTFD_WP + select PTE_MARKER help Allows to create marker PTEs for userfaultfd write protection