Re: [RFC v6 21/62] powerpc: introduce execute-only pkey

2017-08-17 Thread Ram Pai
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

Re: [RFC v6 21/62] powerpc: introduce execute-only pkey

2017-08-02 Thread Michael Ellerman
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 */

Re: [RFC v6 21/62] powerpc: introduce execute-only pkey

2017-08-01 Thread Thiago Jung Bauermann
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) >>> +

Re: [RFC v6 21/62] powerpc: introduce execute-only pkey

2017-08-01 Thread Michael Ellerman
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

Re: [RFC v6 21/62] powerpc: introduce execute-only pkey

2017-07-31 Thread Thiago Jung Bauermann
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

Re: [RFC v6 21/62] powerpc: introduce execute-only pkey

2017-07-29 Thread Ram Pai
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, > >

Re: [RFC v6 21/62] powerpc: introduce execute-only pkey

2017-07-28 Thread Thiago Jung Bauermann
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

[RFC v6 21/62] powerpc: introduce execute-only pkey

2017-07-15 Thread Ram Pai
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 +