Aneesh Kumar K.V ac29c64089 powerpc/mm: Replace _PAGE_USER with _PAGE_PRIVILEGED ... _PAGE_PRIVILEGED means the page can be accessed only by the kernel. This is done to keep pte bits similar to PowerISA 3.0 Radix PTE format. User pages are now marked by clearing _PAGE_PRIVILEGED bit. Previously we allowed the kernel to have a privileged page in the lower address range (USER_REGION). With this patch such access is denied. We also prevent a kernel access to a non-privileged page in higher address range (ie, REGION_ID != 0). Both the above access scenarios should never happen. Cc: Arnd Bergmann <arnd@arndb.de> Cc: Jeremy Kerr <jk@ozlabs.org> Cc: Frederic Barrat <fbarrat@linux.vnet.ibm.com> Acked-by: Ian Munsie <imunsie@au1.ibm.com> Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>		2016-05-01 18:32:26 +10:00
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32	powerpc/mm: Drop PTE_ATOMIC_UPDATES from pmd_hugepage_update()	2016-05-01 18:32:15 +10:00
64	powerpc/mm: Replace _PAGE_USER with _PAGE_PRIVILEGED	2016-05-01 18:32:26 +10:00
pgtable.h	powerpc/mm: Move PTE bits from generic functions to hash64 functions.	2015-12-14 15:19:08 +11:00