On 07/05/2017 02:21 PM, Ram Pai wrote: > x86 does not support disabling execute permissions on a pkey. > > Signed-off-by: Ram Pai <linuxram@xxxxxxxxxx> > --- > arch/x86/kernel/fpu/xstate.c | 3 +++ > 1 files changed, 3 insertions(+), 0 deletions(-) > > diff --git a/arch/x86/kernel/fpu/xstate.c b/arch/x86/kernel/fpu/xstate.c > index c24ac1e..d582631 100644 > --- a/arch/x86/kernel/fpu/xstate.c > +++ b/arch/x86/kernel/fpu/xstate.c > @@ -900,6 +900,9 @@ int arch_set_user_pkey_access(struct task_struct *tsk, int pkey, > if (!boot_cpu_has(X86_FEATURE_OSPKE)) > return -EINVAL; > > + if (init_val & PKEY_DISABLE_EXECUTE) > + return -EINVAL; I'd really rather that we define a supported mask instead of having each architecture go through and list which ones it supports.
