[MODERATED] Re: [PATCH v7 04/10] TAAv7 4

On Tue, Oct 22, 2019 at 11:46:29PM +0200, speck for Borislav Petkov wrote:
> On Tue, Oct 22, 2019 at 04:38:20PM -0500, speck for Josh Poimboeuf wrote:
> > I'm not sure what you mean, I think the patches mitigate TAA by default
> > when TSX is on (ignoring SMT of course).
> > 
> > Also, suspending disbelief for a moment and assuming TSX becomes a huge
> > success story and you want to safely enable it 5 years down the road,
> > you'd have to do
> > 
> >   tsx=on,tsx_async_abort=full,nosmt,tsx_bug2=full,nosmt .... etc
> > 
> > when you just want to turn the darned thing on without having to worry
> > about specifying all the mitigations for all currently known bugs.
> 
> But when you want to enable it 5 years from now, you simply do
> 
> 	tsx=on
> 
> Why would you even need to supply anything after it?

Because my 4-year-old CPU will need the mitigations ;-)

-- 
Josh