linux-kernel - Re: [PATCH 00/19] Refresh queued CET virtualization series

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Message-ID: <YqsTPopgTHYCzCJD@worktop.programming.kicks-ass.net>
Date:   Thu, 16 Jun 2022 13:25:50 +0200
From:   Peter Zijlstra <peterz@...radead.org>
To:     Christoph Hellwig <hch@...radead.org>
Cc:     Yang Weijiang <weijiang.yang@...el.com>, pbonzini@...hat.com,
        seanjc@...gle.com, x86@...nel.org, kvm@...r.kernel.org,
        linux-kernel@...r.kernel.org, rick.p.edgecombe@...el.com
Subject: Re: [PATCH 00/19] Refresh queued CET virtualization series

On Thu, Jun 16, 2022 at 02:10:50AM -0700, Christoph Hellwig wrote:
> On Thu, Jun 16, 2022 at 04:46:24AM -0400, Yang Weijiang wrote:
> > The purpose of this patch series is to refresh the queued CET KVM
> > patches[1] with the latest dependent CET native patches, pursuing
> > the result that whole series could be merged ahead of CET native
> > series[2] [3].
> 
> It might be helpful to explain what CET is here..

Central European Time ofc :-)

I think it stands for Control-flow Enforcement Technology or something
along those lines, but this being Intel it loves to obfuscate stuff and
make it impossible to understand what's being said to increase the
buzzword bong hits.

Its a mostly pointless umbrella term for IBT (Indirect Branch Tracking)
and SHSTK (SHadow STacK), the first of which covers forward edge control
flow and the second covers backward edge control flow.