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| author |   Mike Kravetz <mike.kravetz@oracle.com> | 2017-02-22 15:43:04 -0800 |
|---|---|---|
| committer |   Linus Torvalds <torvalds@linux-foundation.org> | 2017-02-22 16:41:28 -0800 |
| commit | cab350afcbc9c8a744e0d164d1c26560568f770b (patch) | |
| tree | 57eb4021a19e2cd735454a85de03f271ebcb826d /include/uapi/linux/userfaultfd.h | |
| parent | userfaultfd: hugetlbfs: add userfaultfd hugetlb hook (diff) | |
| download | linux-dev-cab350afcbc9c8a744e0d164d1c26560568f770b.tar.xz linux-dev-cab350afcbc9c8a744e0d164d1c26560568f770b.zip | |
userfaultfd: hugetlbfs: allow registration of ranges containing huge pages
Expand the userfaultfd_register/unregister routines to allow VM_HUGETLB
vmas. huge page alignment checking is performed after a VM_HUGETLB vma
is encountered.
Also, since there is no UFFDIO_ZEROPAGE support for huge pages do not
return that as a valid ioctl method for huge page ranges.
Link: http://lkml.kernel.org/r/20161216144821.5183-22-aarcange@redhat.com
Signed-off-by: Mike Kravetz <mike.kravetz@oracle.com>
Signed-off-by: Andrea Arcangeli <aarcange@redhat.com>
Cc: "Dr. David Alan Gilbert" <dgilbert@redhat.com>
Cc: Hillf Danton <hillf.zj@alibaba-inc.com>
Cc: Michael Rapoport <RAPOPORT@il.ibm.com>
Cc: Mike Rapoport <rppt@linux.vnet.ibm.com>
Cc: Pavel Emelyanov <xemul@parallels.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'include/uapi/linux/userfaultfd.h')
| -rw-r--r-- | include/uapi/linux/userfaultfd.h | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/include/uapi/linux/userfaultfd.h b/include/uapi/linux/userfaultfd.h index 2bbf32319cf5..a3828a9bc16e 100644 --- a/include/uapi/linux/userfaultfd.h +++ b/include/uapi/linux/userfaultfd.h @@ -29,6 +29,9 @@ ((__u64)1 << _UFFDIO_WAKE | \ (__u64)1 << _UFFDIO_COPY | \ (__u64)1 << _UFFDIO_ZEROPAGE) +#define UFFD_API_RANGE_IOCTLS_HPAGE \ + ((__u64)1 << _UFFDIO_WAKE | \ + (__u64)1 << _UFFDIO_COPY) /* * Valid ioctl command number range with this API is from 0x00 to |