[MODERATED] Re: [patch V6 04/14] MDS basics 4

On Fri, Mar 01, 2019 at 10:47:42PM +0100, speck for Thomas Gleixner wrote:
> Subject: [patch V6 04/14] x86/speculation/mds: Add BUG_MSBDS_ONLY
> From: Thomas Gleixner <[email protected]>
> 
> This bug bit is set on CPUs which are only affected by Microarchitectural
> Store Buffer Data Sampling (MSBDS) and not by any other MDS variant.

This patch is pointless. It won't have VERW support and we don't have mitigation
for Xeon Phi because Linus rejected software sequences.

Xeon Phi will simply not be mitigated. However Xeon PHIs are not widely
used, and those that are deployed can be handled in different ways.

-Andi