[PATCH v2 06/12] powerpc/book3s64/pkeys: Prevent key 1 modification from userspace.

[Aneesh Kumar K.V]

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 3db0b3cfc322..9e68a08799ee 100644
--- a/arch/powerpc/mm/book3s64/pkeys.c
+++ b/arch/powerpc/mm/book3s64/pkeys.c
@@ -174,6 +174,7 @@ 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