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userfaultfd: wp: add pmd_swp_*uffd_wp() helpers 

Adding these missing helpers for uffd-wp operations with pmd
swap/migration entries.

Signed-off-by: Peter Xu <peterx@redhat.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Reviewed-by: Jerome Glisse <jglisse@redhat.com>
Reviewed-by: Mike Rapoport <rppt@linux.vnet.ibm.com>
Cc: Andrea Arcangeli <aarcange@redhat.com>
Cc: Bobby Powers <bobbypowers@gmail.com>
Cc: Brian Geffon <bgeffon@google.com>
Cc: David Hildenbrand <david@redhat.com>
Cc: Denis Plotnikov <dplotnikov@virtuozzo.com>
Cc: "Dr . David Alan Gilbert" <dgilbert@redhat.com>
Cc: Hugh Dickins <hughd@google.com>
Cc: Johannes Weiner <hannes@cmpxchg.org>
Cc: "Kirill A . Shutemov" <kirill@shutemov.name>
Cc: Martin Cracauer <cracauer@cons.org>
Cc: Marty McFadden <mcfadden8@llnl.gov>
Cc: Maya Gokhale <gokhale2@llnl.gov>
Cc: Mel Gorman <mgorman@suse.de>
Cc: Mike Kravetz <mike.kravetz@oracle.com>
Cc: Pavel Emelyanov <xemul@openvz.org>
Cc: Rik van Riel <riel@redhat.com>
Cc: Shaohua Li <shli@fb.com>
Link: http://lkml.kernel.org/r/20200220163112.11409-10-peterx@redhat.com
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Peter Xu 2020-04-06 20:05:57 -07:00 committed by Linus Torvalds
parent b569a17607
commit 2e3d5dc508
2 changed files with 30 additions and 0 deletions
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15
arch/x86/include/asm/pgtable.h
View File

@ -1424,6 +1424,21 @@ static inline pte_t pte_swp_clear_uffd_wp(pte_t pte)
{
return pte_clear_flags(pte, _PAGE_SWP_UFFD_WP);
}
static inline pmd_t pmd_swp_mkuffd_wp(pmd_t pmd)
{
return pmd_set_flags(pmd, _PAGE_SWP_UFFD_WP);
}
static inline int pmd_swp_uffd_wp(pmd_t pmd)
{
return pmd_flags(pmd) & _PAGE_SWP_UFFD_WP;
}
static inline pmd_t pmd_swp_clear_uffd_wp(pmd_t pmd)
{
return pmd_clear_flags(pmd, _PAGE_SWP_UFFD_WP);
}
#endif /* CONFIG_HAVE_ARCH_USERFAULTFD_WP */
#define PKRU_AD_BIT 0x1

15
include/asm-generic/pgtable_uffd.h
View File

@ -46,6 +46,21 @@ static __always_inline pte_t pte_swp_clear_uffd_wp(pte_t pte)
{
return pte;
}
static inline pmd_t pmd_swp_mkuffd_wp(pmd_t pmd)
{
return pmd;
}
static inline int pmd_swp_uffd_wp(pmd_t pmd)
{
return 0;
}
static inline pmd_t pmd_swp_clear_uffd_wp(pmd_t pmd)
{
return pmd;
}
#endif /* CONFIG_HAVE_ARCH_USERFAULTFD_WP */
#endif /* _ASM_GENERIC_PGTABLE_UFFD_H */