On Thu, Aug 17, 2017 at 04:35:55PM -0700, Ram Pai wrote:
> On Wed, Aug 02, 2017 at 07:40:46PM +1000, Michael Ellerman wrote:
> > Thiago Jung Bauermann writes:
> >
> > > Michael Ellerman writes:
> > >
> > >> Thiago Jung Bauermann writes:
> > >>> Ram Pai writes:
> > >> ...
> > +
> > +
Thiago Jung Bauermann writes:
> Michael Ellerman writes:
>
>> Thiago Jung Bauermann writes:
>>> Ram Pai writes:
>> ...
+
+ /* We got one, store it and use it from here on out */
+ if (need_to_set_mm_pkey)
+ mm->context.execute_only_pkey = execute_only_pkey;
Michael Ellerman writes:
> Thiago Jung Bauermann writes:
>> Ram Pai writes:
> ...
>>> +
>>> + /* We got one, store it and use it from here on out */
>>> + if (need_to_set_mm_pkey)
>>> + mm->context.execute_only_pkey = execute_only_pkey;
>>> + return execute_only_pkey;
>>> +}
>>
Thiago Jung Bauermann writes:
> Ram Pai writes:
...
>> +
>> +/* We got one, store it and use it from here on out */
>> +if (need_to_set_mm_pkey)
>> +mm->context.execute_only_pkey = execute_only_pkey;
>> +return execute_only_pkey;
>> +}
>
> If you follow the code flow in __
Ram Pai writes:
> On Fri, Jul 28, 2017 at 07:17:13PM -0300, Thiago Jung Bauermann wrote:
>>
>> Ram Pai writes:
>> > --- a/arch/powerpc/mm/pkeys.c
>> > +++ b/arch/powerpc/mm/pkeys.c
>> > @@ -97,3 +97,60 @@ int __arch_set_user_pkey_access(struct task_struct
>> > *tsk, int pkey,
>> >init_iam
On Fri, Jul 28, 2017 at 07:17:13PM -0300, Thiago Jung Bauermann wrote:
>
> Ram Pai writes:
> > --- a/arch/powerpc/mm/pkeys.c
> > +++ b/arch/powerpc/mm/pkeys.c
> > @@ -97,3 +97,60 @@ int __arch_set_user_pkey_access(struct task_struct *tsk,
> > int pkey,
> > init_iamr(pkey, new_iamr_bits);
> >
Ram Pai writes:
> --- a/arch/powerpc/mm/pkeys.c
> +++ b/arch/powerpc/mm/pkeys.c
> @@ -97,3 +97,60 @@ int __arch_set_user_pkey_access(struct task_struct *tsk,
> int pkey,
> init_iamr(pkey, new_iamr_bits);
> return 0;
> }
> +
> +static inline bool pkey_allows_readwrite(int pkey)
> +{
This patch provides the implementation of execute-only pkey.
The architecture-independent expects the ability to create
and manage a special key which has execute-only permission.
Signed-off-by: Ram Pai
---
arch/powerpc/include/asm/book3s/64/mmu.h |1 +
arch/powerpc/include/asm/pkeys.h
