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. [[email protected]: hide PTE_MARKER option] Link: https://lkml.kernel.org/r/[email protected] Link: https://lkml.kernel.org/r/[email protected] Signed-off-by: Peter Xu <[email protected]> Cc: Alistair Popple <[email protected]> Cc: Andrea Arcangeli <[email protected]> Cc: Axel Rasmussen <[email protected]> Cc: David Hildenbrand <[email protected]> Cc: Hugh Dickins <[email protected]> Cc: Jerome Glisse <[email protected]> Cc: "Kirill A . Shutemov" <[email protected]> Cc: Matthew Wilcox <[email protected]> Cc: Mike Kravetz <[email protected]> Cc: Mike Rapoport <[email protected]> Cc: Nadav Amit <[email protected]> Signed-off-by: Andrew Morton <[email protected]>
chewitt · May 13, 2022 · 81e0f15 · 81e0f15
1 parent b1f9e87
commit 81e0f15
Showing 1 changed file with 5 additions and 3 deletions.
diff --git 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