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

On Wed 16-10-19 09:54:34, speck for Michal Hocko wrote:
[...]
> +config X86_INTEL_TSX_MODE_OFF
> +	bool "off"
> +	help
> +	  TSX is always disabled - equals tsx=off command line parameter.
> +
> +config X86_INTEL_TSX_MODE_ON
> +	bool "on"
> +	help
> +	  TSX is always enabled on TSX capable HW - equals tsx=on command line
> +	  parameter.
> +
> +config X86_INTEL_TSX_MODE_AUTO
> +	bool "auto"
> +	help
> +	  TSX is enabled on TSX capable HW that is believed to be safe against
> +	  side channel attacks- equals tsx=auto command line parameter.
> +endchoice

I have just reread the discussion again and I have to say that there is
more confusion and uncertainty than I would like to see. Can somebody
from Intel give an authoritative answer to the following question
please?

Is tsx=auto going to lead to any different state than tsx=on? In other
words does auto mode make any sense at all?

Thanks!
-- 
Michal Hocko
SUSE Labs