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| author | Dave Hansen <dave.hansen@linux.intel.com> | 2015-06-07 11:37:02 -0700 |
|---|---|---|
| committer | Ingo Molnar <mingo@kernel.org> | 2015-06-09 12:24:31 +0200 |
| commit | 8c3641e957a948f41f0174290096ed7a3b95e703 (patch) | |
| tree | 2db374d86670e0a129e91a3cd669a9f926a0e996 /Documentation | |
| parent | eb099e5bc5457c42043e57cf0f4ce574669b9697 (diff) | |
| download | linux-stable-8c3641e957a948f41f0174290096ed7a3b95e703.tar.gz linux-stable-8c3641e957a948f41f0174290096ed7a3b95e703.tar.bz2 linux-stable-8c3641e957a948f41f0174290096ed7a3b95e703.zip | |
x86/mpx: Introduce a boot-time disable flag
MPX has the _potential_ to cause some issues. Say part of your
init system tried to protect one of its components from buffer
overflows with MPX. If there were a false positive, it's
possible that MPX could keep a system from booting.
MPX could also potentially cause performance issues since it is
present in hot paths like the unmap path.
Allow it to be disabled at boot time.
Signed-off-by: Dave Hansen <dave.hansen@linux.intel.com>
Reviewed-by: Thomas Gleixner <tglx@linutronix.de
Cc: Andrew Morton <akpm@linux-foundation.org>
Cc: Dave Hansen <dave@sr71.net>
Cc: H. Peter Anvin <hpa@zytor.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Link: http://lkml.kernel.org/r/20150607183702.2E8B77AB@viggo.jf.intel.com
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Diffstat (limited to 'Documentation')
| -rw-r--r-- | Documentation/kernel-parameters.txt | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/Documentation/kernel-parameters.txt b/Documentation/kernel-parameters.txt index 61ab1628a057..8b7e5c342302 100644 --- a/Documentation/kernel-parameters.txt +++ b/Documentation/kernel-parameters.txt @@ -937,6 +937,10 @@ bytes respectively. Such letter suffixes can also be entirely omitted. Enable debug messages at boot time. See Documentation/dynamic-debug-howto.txt for details. + nompx [X86] Disables Intel Memory Protection Extensions. + See Documentation/x86/intel_mpx.txt for more + information about the feature. + eagerfpu= [X86] on enable eager fpu restore off disable eager fpu restore |