Re: [RFC v6 19/62] powerpc: ability to create execute-disabled pkeys

2017-07-31 Thread Michael Ellerman
Ram Pai writes: > On Thu, Jul 27, 2017 at 11:54:31AM -0300, Thiago Jung Bauermann wrote: >> >> Ram Pai writes: >> >> > --- a/arch/powerpc/include/asm/pkeys.h >> > +++ b/arch/powerpc/include/asm/pkeys.h >> > @@ -2,6 +2,18 @@ >> > #define _ASM_PPC64_PKEYS_H >> > >> > extern bool pkey_inited; >

Re: [RFC v6 19/62] powerpc: ability to create execute-disabled pkeys

2017-07-29 Thread Ram Pai
On Thu, Jul 27, 2017 at 11:54:31AM -0300, Thiago Jung Bauermann wrote: > > Ram Pai writes: > > > --- a/arch/powerpc/include/asm/pkeys.h > > +++ b/arch/powerpc/include/asm/pkeys.h > > @@ -2,6 +2,18 @@ > > #define _ASM_PPC64_PKEYS_H > > > > extern bool pkey_inited; > > +/* override any generic P

Re: [RFC v6 19/62] powerpc: ability to create execute-disabled pkeys

2017-07-27 Thread Thiago Jung Bauermann
Thiago Jung Bauermann writes: > diff --git a/arch/powerpc/include/asm/pkeys.h > b/arch/powerpc/include/asm/pkeys.h > index e31f5ee8e81f..67e6a3a343ae 100644 > --- a/arch/powerpc/include/asm/pkeys.h > +++ b/arch/powerpc/include/asm/pkeys.h > @@ -4,17 +4,6 @@ > #include > > extern bool pkey_i

Re: [RFC v6 19/62] powerpc: ability to create execute-disabled pkeys

2017-07-27 Thread Thiago Jung Bauermann
Ram Pai writes: > --- a/arch/powerpc/include/asm/pkeys.h > +++ b/arch/powerpc/include/asm/pkeys.h > @@ -2,6 +2,18 @@ > #define _ASM_PPC64_PKEYS_H > > extern bool pkey_inited; > +/* override any generic PKEY Permission defines */ > +#undef PKEY_DISABLE_ACCESS > +#define PKEY_DISABLE_ACCESS

[RFC v6 19/62] powerpc: ability to create execute-disabled pkeys

2017-07-15 Thread Ram Pai
powerpc has hardware support to disable execute on a pkey. This patch enables the ability to create execute-disabled keys. Signed-off-by: Ram Pai --- arch/powerpc/include/asm/pkeys.h | 12 arch/powerpc/mm/pkeys.c | 10 ++ 2 files changed, 22 insertions(+), 0 del