Re: [PATCH v2] x86/bugs: Enable STIBP for IBPB mitigated RetBleed

[Ingo Molnar]

* Kim Phillips <kim.phillips@xxxxxxx> wrote:

>  			Speculative Code Execution with Return Instructions)
>  			vulnerability.
>  
> +			AMD-based unret and ibpb mitigations alone do not stop
> +			sibling threads influencing the predictions of other sibling
> +			threads.  For that reason, we use STIBP on processors
> +			that support it, and mitigate SMT on processors that don't.

>  	 * retbleed_select_mitigation(); specifically the STIBP selection is
> -	 * forced for UNRET.
> +	 * forced for UNRET or IBPB.

Nit: could you please capitalize the acronyms & instruction names 
consistently? Human eyesight is case sensitive.

Ie. it should be UNRET and IBPB everywhere.

Thanks,

	Ingo