Key 1 is marked reserved by ISA. Setup uamor to prevent userspace modification of the same.
Signed-off-by: Aneesh Kumar K.V <aneesh.ku...@linux.ibm.com> --- arch/powerpc/mm/book3s64/pkeys.c | 1 + 1 file changed, 1 insertion(+) diff --git a/arch/powerpc/mm/book3s64/pkeys.c b/arch/powerpc/mm/book3s64/pkeys.c index 54d4868a9e68..59950d1cffc9 100644 --- a/arch/powerpc/mm/book3s64/pkeys.c +++ b/arch/powerpc/mm/book3s64/pkeys.c @@ -183,6 +183,7 @@ static int pkey_initialize(void) * programming note. */ reserved_allocation_mask |= (0x1 << 1); + default_uamor &= ~(0x3ul << pkeyshift(1)); /* * Prevent the usage of OS reserved the keys. Update UAMOR -- 2.26.2