diff options
| author | Pawan Gupta <[email protected]> | 2019-10-23 11:01:53 +0200 |
|---|---|---|
| committer | Thomas Gleixner <[email protected]> | 2019-10-28 08:36:58 +0100 |
| commit | 95c5824f75f3ba4c9e8e5a4b1a623c95390ac266 (patch) | |
| tree | 435c7815c83cb35214bb13686e47422b66b25ef7 /scripts/gcc-plugins/cyc_complexity_plugin.c | |
| parent | 286836a70433fb64131d2590f4bf512097c255e1 (diff) | |
x86/cpu: Add a "tsx=" cmdline option with TSX disabled by default
Add a kernel cmdline parameter "tsx" to control the Transactional
Synchronization Extensions (TSX) feature. On CPUs that support TSX
control, use "tsx=on|off" to enable or disable TSX. Not specifying this
option is equivalent to "tsx=off". This is because on certain processors
TSX may be used as a part of a speculative side channel attack.
Carve out the TSX controlling functionality into a separate compilation
unit because TSX is a CPU feature while the TSX async abort control
machinery will go to cpu/bugs.c.
[ bp: - Massage, shorten and clear the arg buffer.
- Clarifications of the tsx= possible options - Josh.
- Expand on TSX_CTRL availability - Pawan. ]
Signed-off-by: Pawan Gupta <[email protected]>
Signed-off-by: Borislav Petkov <[email protected]>
Signed-off-by: Thomas Gleixner <[email protected]>
Reviewed-by: Josh Poimboeuf <[email protected]>
Diffstat (limited to 'scripts/gcc-plugins/cyc_complexity_plugin.c')
0 files changed, 0 insertions, 0 deletions