]> git.proxmox.com Git - mirror_ubuntu-eoan-kernel.git/commit
powerpc/spufs: Fix hash faults for kernel regions
authorJeremy Kerr <jk@ozlabs.org>
Wed, 24 May 2017 06:49:59 +0000 (16:49 +1000)
committerMichael Ellerman <mpe@ellerman.id.au>
Thu, 25 May 2017 13:07:44 +0000 (23:07 +1000)
commitd75e4919cc0b6fbcbc8d6654ef66d87a9dbf1526
tree4b9247e309d5b48246b0c94532ca9c81da23b2b3
parentd957fb4d173647640a2b83e7c7e56a580e7fc7e7
powerpc/spufs: Fix hash faults for kernel regions

Commit ac29c64089b7 ("powerpc/mm: Replace _PAGE_USER with
_PAGE_PRIVILEGED") swapped _PAGE_USER for _PAGE_PRIVILEGED, and
introduced check_pte_access() which denied kernel access to
non-_PAGE_PRIVILEGED pages.

However, it didn't add _PAGE_PRIVILEGED to the hash fault handler
for spufs' kernel accesses, so the DMAs required to establish SPE
memory no longer work.

This change adds _PAGE_PRIVILEGED to the hash fault handler for
kernel accesses.

Fixes: ac29c64089b7 ("powerpc/mm: Replace _PAGE_USER with _PAGE_PRIVILEGED")
Cc: stable@vger.kernel.org # v4.7+
Signed-off-by: Jeremy Kerr <jk@ozlabs.org>
Reported-by: Sombat Tragolgosol <sombat3960@gmail.com>
Reviewed-by: Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
arch/powerpc/platforms/cell/spu_base.c