diff options
| author | Fenghua Yu <[email protected]> | 2011-05-17 18:44:26 -0700 |
|---|---|---|
| committer | H. Peter Anvin <[email protected]> | 2011-05-17 20:56:59 -0700 |
| commit | d0281a257f370b09c410e466571858b4e12869c9 (patch) | |
| tree | 87d48822fbbf0325fdd140d1bcd868ad8c230456 /tools/perf/util/scripting-engines/trace-event-python.c | |
| parent | 724a92ee45c04cb9d82884a856b03b1e594d9de1 (diff) | |
x86, cpufeature: Add cpufeature flag for SMEP
Add support for newly documented SMEP (Supervisor Mode Execution Protection) CPU
feature flag.
SMEP prevents the CPU in kernel-mode to jump to an executable page
that has the user flag set in the PTE. This prevents the kernel from
executing user-space code accidentally or maliciously, so it for
example prevents kernel exploits from jumping to specially prepared
user-mode shell code.
[ hpa: added better description by Ingo Molnar ]
Signed-off-by: Fenghua Yu <[email protected]>
LKML-Reference: <[email protected]>
Signed-off-by: H. Peter Anvin <[email protected]>
Diffstat (limited to 'tools/perf/util/scripting-engines/trace-event-python.c')
0 files changed, 0 insertions, 0 deletions