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| author | Dave Hansen <dave.hansen@linux.intel.com> | 2014-12-12 19:38:36 +0100 |
|---|---|---|
| committer | Thomas Gleixner <tglx@linutronix.de> | 2014-12-15 15:58:57 +0100 |
| commit | 72e9b5fe9bee0826e7ce7599adbdc64e544780ef (patch) | |
| tree | ce252b251b1ca1732b9eaba4f5361d9d793b7828 /Documentation/x86 | |
| parent | x86, mpx: Update documentation (diff) | |
| download | linux-72e9b5fe9bee0826e7ce7599adbdc64e544780ef.tar.xz linux-72e9b5fe9bee0826e7ce7599adbdc64e544780ef.zip | |
x86, mpx: Give MPX a real config option prompt
Give MPX a real config option. The CPUs that support it (referenced
here):
https://software.intel.com/en-us/forums/topic/402393
are not available publicly yet. Right now only the software emulator
provides MPX for the general public.
[ tglx: Make it default off. There is no point in having it on right
now as no hardware and no proper tooling support are available ]
Signed-off-by: Dave Hansen <dave.hansen@linux.intel.com>
Cc: Dave Hansen <dave@sr71.net>
Link: http://lkml.kernel.org/r/20141212183836.2569D58D@viggo.jf.intel.com
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Diffstat (limited to 'Documentation/x86')
| -rw-r--r-- | Documentation/x86/intel_mpx.txt | 6 |
1 files changed, 5 insertions, 1 deletions
diff --git a/Documentation/x86/intel_mpx.txt b/Documentation/x86/intel_mpx.txt index 6ca6e2bd9ae9..818518a3ff01 100644 --- a/Documentation/x86/intel_mpx.txt +++ b/Documentation/x86/intel_mpx.txt @@ -7,11 +7,15 @@ that can be used in conjunction with compiler changes to check memory references, for those references whose compile-time normal intentions are usurped at runtime due to buffer overflow or underflow. +You can tell if your CPU supports MPX by looking in /proc/cpuinfo: + + cat /proc/cpuinfo | grep ' mpx ' + For more information, please refer to Intel(R) Architecture Instruction Set Extensions Programming Reference, Chapter 9: Intel(R) Memory Protection Extensions. -Note: Currently no hardware with MPX ISA is available but it is always +Note: As of December 2014, no hardware with MPX is available but it is possible to use SDE (Intel(R) Software Development Emulator) instead, which can be downloaded from http://software.intel.com/en-us/articles/intel-software-development-emulator |