linux-kernel - Re: [PATCH 2/6] s390: implement nospec

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Message-ID: <nycvar.YFH.7.76.1801171340460.11852@cbobk.fhfr.pm>
Date:   Wed, 17 Jan 2018 13:41:54 +0100 (CET)
From:   Jiri Kosina <jikos@...nel.org>
To:     Martin Schwidefsky <schwidefsky@...ibm.com>
cc:     linux-kernel@...r.kernel.org, linux-s390@...r.kernel.org,
        kvm@...r.kernel.org, Heiko Carstens <heiko.carstens@...ibm.com>,
        Paolo Bonzini <pbonzini@...hat.com>,
        Cornelia Huck <cohuck@...hat.com>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        Jon Masters <jcm@...hat.com>,
        Marcus Meissner <meissner@...e.de>
Subject: Re: [PATCH 2/6] s390: implement nospec_[load|ptr]

On Wed, 17 Jan 2018, Martin Schwidefsky wrote:

> Implement nospec_load() and nospec_ptr() for s390 with the new
> gmb() barrier between the boundary condition and the load that
> may not be done speculatively.

FWIW the naming seems to be changing constantly. The latest patchset from 
Dan Williams [1] uses ifence_...().

[1] lkml.kernel.org/r/151586744180.5820.13215059696964205856.stgit@...llia2-desk3.amr.corp.intel.com

-- 
Jiri Kosina
SUSE Labs