Re: [PATCH v2] x86/retbleed: add "stuff" mode admin documentation

[Randy Dunlap]

On 1/9/23 09:19, Dave Hansen wrote:
> On 1/9/23 08:08, Randy Dunlap wrote:
>> +			stuff        - Enables "stuffing" mode mitigation,
>> +				       which uses return thunking and call depth
>> +				       tracking.  Only in effect if
>> +				       CONFIG_CALL_DEPTH_TRACKING is set and
>> +				       Spectre V2 mitigation mode is
>> +				       "retpoline".
>> +				       IBRS is fully secure mitigation but is
>> +				       more costly (slower) than stuffing.
> 
> The "fully secure" thing makes me cringe a bit.
> 
> I'd suggest saying:
> 
> 	IBRS is a stronger mitigation
> 	but is more costly than stuffing
> 	(slower).

OK, will do (v3).  :)

Thanks.

-- 
~Randy