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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 <peterx@redhat.com>
Cc: Alistair Popple <apopple@nvidia.com>
Cc: Andrea Arcangeli <aarcange@redhat.com>
Cc: Axel Rasmussen <axelrasmussen@google.com>
Cc: David Hildenbrand <david@redhat.com>
Cc: Hugh Dickins <hughd@google.com>
Cc: Jerome Glisse <jglisse@redhat.com>
Cc: "Kirill A . Shutemov" <kirill@shutemov.name>
Cc: Matthew Wilcox <willy@infradead.org>
Cc: Mike Kravetz <mike.kravetz@oracle.com>
Cc: Mike Rapoport <rppt@linux.vnet.ibm.com>
Cc: Nadav Amit <nadav.amit@gmail.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
This commit is contained in:
Peter Xu 2022-05-12 20:22:56 -07:00 committed by Andrew Morton
parent b1f9e87686
commit 81e0f15f2e
1 changed files with 5 additions and 3 deletions
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8
mm/Kconfig
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@ -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