[MODERATED] Re: [PATCH v5 08/11] TAAv5 8

On Mon, Oct 21, 2019 at 02:54:29PM +0200, speck for Michal Hocko wrote:
> On Thu 17-10-19 17:14:07, speck for Pawan Gupta wrote:
> [...]
> > Let me know if there are any questions.
> 
> is there any list of CPUs that would benefit from tsx=auto compared to
> tsx=on? In other words do we really need both?

Below is the list of TAA affected CPUs that will get TSX_CTRL MSR.

+----------------------------+------------------+------------+
|            Name            |  Family / model  |  Stepping  |
+============================+==================+============+
| Whiskey Lake (ULT refresh) |      06_8E       |    0xC     |
+----------------------------+------------------+------------+
|    2nd gen Cascade Lake    |      06_55       |    6, 7    |
+----------------------------+------------------+------------+
|       Coffee Lake R        |      06_9E       |    0xD     |
+----------------------------+------------------+------------+

tsx=auto on these CPUs will disable TSX.
tsx=on will keep TSX enabled.

Thanks,
Pawan