Re: [RFD] x86: The future of MPX

2018-05-03 Thread Eric W. Biederman
Borislav Petkov writes: > On Sun, Apr 29, 2018 at 09:44:00PM -0700, Dave Hansen wrote: >> The loss of the GCC support is definitely a bummer. > > https://gcc.gnu.org/ml/gcc-patches/2018-05/msg00027.html > > Will go into gcc9. So we should see this in a released version of gcc in

Re: [RFD] x86: The future of MPX

2018-05-03 Thread Eric W. Biederman
Borislav Petkov writes: > On Sun, Apr 29, 2018 at 09:44:00PM -0700, Dave Hansen wrote: >> The loss of the GCC support is definitely a bummer. > > https://gcc.gnu.org/ml/gcc-patches/2018-05/msg00027.html > > Will go into gcc9. So we should see this in a released version of gcc in about a year?

Re: [RFD] x86: The future of MPX

2018-05-02 Thread Borislav Petkov
On Sun, Apr 29, 2018 at 09:44:00PM -0700, Dave Hansen wrote: > The loss of the GCC support is definitely a bummer. https://gcc.gnu.org/ml/gcc-patches/2018-05/msg00027.html Will go into gcc9. -- Regards/Gruss, Boris. Good mailing practices for 400: avoid top-posting and trim the reply.

Re: [RFD] x86: The future of MPX

2018-05-02 Thread Borislav Petkov
On Sun, Apr 29, 2018 at 09:44:00PM -0700, Dave Hansen wrote: > The loss of the GCC support is definitely a bummer. https://gcc.gnu.org/ml/gcc-patches/2018-05/msg00027.html Will go into gcc9. -- Regards/Gruss, Boris. Good mailing practices for 400: avoid top-posting and trim the reply.

Re: [RFD] x86: The future of MPX

2018-04-29 Thread Dave Hansen
On 04/28/2018 09:44 AM, Linus Torvalds wrote: > On Sat, Apr 28, 2018 at 9:36 AM Linus Torvalds < > torva...@linux-foundation.org> wrote: > >> They need to be run as root. > Side note: don't get me wrong. If the MPX stuff isn't supported by gcc, > then there is little point in us supporting it in

Re: [RFD] x86: The future of MPX

2018-04-29 Thread Dave Hansen
On 04/28/2018 09:44 AM, Linus Torvalds wrote: > On Sat, Apr 28, 2018 at 9:36 AM Linus Torvalds < > torva...@linux-foundation.org> wrote: > >> They need to be run as root. > Side note: don't get me wrong. If the MPX stuff isn't supported by gcc, > then there is little point in us supporting it in

Re: [RFD] x86: The future of MPX

2018-04-28 Thread Eric W. Biederman
Ingo Molnar writes: > * Linus Torvalds wrote: > >> On Sat, Apr 28, 2018 at 2:18 AM Ingo Molnar wrote: >> >> > I just tried the MPX testcases with the latest kernel: >> >> > deimos:~/tip/tools/testing/selftests/x86>

Re: [RFD] x86: The future of MPX

2018-04-28 Thread Eric W. Biederman
Ingo Molnar writes: > * Linus Torvalds wrote: > >> On Sat, Apr 28, 2018 at 2:18 AM Ingo Molnar wrote: >> >> > I just tried the MPX testcases with the latest kernel: >> >> > deimos:~/tip/tools/testing/selftests/x86> ./mpx-mini-test_64 >> >> They need to be run as root. They try to access

Re: [RFD] x86: The future of MPX

2018-04-28 Thread Ingo Molnar
* Linus Torvalds wrote: > On Sat, Apr 28, 2018 at 2:18 AM Ingo Molnar wrote: > > > I just tried the MPX testcases with the latest kernel: > > > deimos:~/tip/tools/testing/selftests/x86> ./mpx-mini-test_64 > > They need to be run as root.

Re: [RFD] x86: The future of MPX

2018-04-28 Thread Ingo Molnar
* Linus Torvalds wrote: > On Sat, Apr 28, 2018 at 2:18 AM Ingo Molnar wrote: > > > I just tried the MPX testcases with the latest kernel: > > > deimos:~/tip/tools/testing/selftests/x86> ./mpx-mini-test_64 > > They need to be run as root. They try to access > >

Re: [RFD] x86: The future of MPX

2018-04-28 Thread Linus Torvalds
On Sat, Apr 28, 2018 at 9:36 AM Linus Torvalds < torva...@linux-foundation.org> wrote: > They need to be run as root. Side note: don't get me wrong. If the MPX stuff isn't supported by gcc, then there is little point in us supporting it in the kernel either. So I'm just saying that the

Re: [RFD] x86: The future of MPX

2018-04-28 Thread Linus Torvalds
On Sat, Apr 28, 2018 at 9:36 AM Linus Torvalds < torva...@linux-foundation.org> wrote: > They need to be run as root. Side note: don't get me wrong. If the MPX stuff isn't supported by gcc, then there is little point in us supporting it in the kernel either. So I'm just saying that the

Re: [RFD] x86: The future of MPX

2018-04-28 Thread Linus Torvalds
On Sat, Apr 28, 2018 at 2:18 AM Ingo Molnar wrote: > I just tried the MPX testcases with the latest kernel: > deimos:~/tip/tools/testing/selftests/x86> ./mpx-mini-test_64 They need to be run as root. They try to access /sys/kernel/debug/tracing/set_ftrace_pid

Re: [RFD] x86: The future of MPX

2018-04-28 Thread Linus Torvalds
On Sat, Apr 28, 2018 at 2:18 AM Ingo Molnar wrote: > I just tried the MPX testcases with the latest kernel: > deimos:~/tip/tools/testing/selftests/x86> ./mpx-mini-test_64 They need to be run as root. They try to access /sys/kernel/debug/tracing/set_ftrace_pid

Re: [RFD] x86: The future of MPX

2018-04-28 Thread Ingo Molnar
* Thomas Gleixner wrote: > Dave, > > I've got the following MPX related information: > > But they [Intel] certainly haven't maintained the whole MPX support > in GCC at all since two or three years (e.g. bootstrap with MPX was broken > since forever), so now it's

Re: [RFD] x86: The future of MPX

2018-04-28 Thread Ingo Molnar
* Thomas Gleixner wrote: > Dave, > > I've got the following MPX related information: > > But they [Intel] certainly haven't maintained the whole MPX support > in GCC at all since two or three years (e.g. bootstrap with MPX was broken > since forever), so now it's gone from GCC. >

[RFD] x86: The future of MPX

2018-04-27 Thread Thomas Gleixner
Dave, I've got the following MPX related information: But they [Intel] certainly haven't maintained the whole MPX support in GCC at all since two or three years (e.g. bootstrap with MPX was broken since forever), so now it's gone from GCC. and I know that GCC is discussing MPX

[RFD] x86: The future of MPX

2018-04-27 Thread Thomas Gleixner
Dave, I've got the following MPX related information: But they [Intel] certainly haven't maintained the whole MPX support in GCC at all since two or three years (e.g. bootstrap with MPX was broken since forever), so now it's gone from GCC. and I know that GCC is discussing MPX