Change ac29c64089b7 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.
Signed-off-by: Jeremy Kerr <j...@ozlabs.org>
Reported-by: Sombat Tragolgosol <sombat3...@gmail.com>
CC: Aneesh Kumar K.V <aneesh.ku...@linux.vnet.ibm.com>
---
arch/powerpc/platforms/cell/spu_base.c | 4 +++-
1 file changed, 3 insertions(+), 1 deletion(-)
diff --git a/arch/powerpc/platforms/cell/spu_base.c
b/arch/powerpc/platforms/cell/spu_base.c
index 96c2b8a..0c45cdb 100644
--- a/arch/powerpc/platforms/cell/spu_base.c
+++ b/arch/powerpc/platforms/cell/spu_base.c
@@ -197,7 +197,9 @@ static int __spu_trap_data_map(struct spu *spu, unsigned
long ea, u64 dsisr)
(REGION_ID(ea) != USER_REGION_ID)) {
spin_unlock(&spu->register_lock);
- ret = hash_page(ea, _PAGE_PRESENT | _PAGE_READ, 0x300, dsisr);
+ ret = hash_page(ea,
+ _PAGE_PRESENT | _PAGE_READ | _PAGE_PRIVILEGED,
+ 0x300, dsisr);
spin_lock(&spu->register_lock);
if (!ret) {
--
2.7.4
