On 10/22/19 4:02 PM, speck for Luck, Tony wrote:
> On Tue, Oct 22, 2019 at 09:28:20PM +0200, speck for Borislav Petkov wrote:
>> Or, a completely different idea: I wonder if we could merge the two
>> options like we do for l1tf= for example where we have
>>
>> 	l1tf=<opt1>,<opt2>
>>
>> and then do:
>>
>> 	tsx=on,async_abort_full
>> 	tsx=on,async_abort_full,nosmt
>> 	tsx=off
>>
>> That should even diminish the number of combinations because once you've
>> supplied "tsx=off" for example, async_abort doesn't matter.
> 
> At first glance I find that more confusing that helpful.
> 
> Perspective: TAA is an issue that affects ~3 CPU models. It will be
> a non-issue on future models.

This should have been the very first thing mentioned, on the first day.
It's taken a very long time for us to all get on this same page.

> TSX control is a new CPU feature control that happens to begin
> with those three models, but will continue to be present on future
> CPU models.

So this answers my other question. The MSR will be there forevermore.
Meaning that tsx=off has meaning provided you're on a MDS_NO+ part.

Jon.

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