linux-kernel - Re: [PATCH v4 3/4] arm64: Use _

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Date:   Wed, 1 Feb 2017 17:08:52 +0000
From:   Will Deacon <will.deacon@....com>
To:     Punit Agrawal <punit.agrawal@....com>
Cc:     Christoffer Dall <christoffer.dall@...aro.org>,
        Mark Langsdorf <mlangsdo@...hat.com>,
        Jon Masters <jcm@...hat.com>, kvm@...r.kernel.org,
        Marc Zyngier <marc.zyngier@....com>,
        Catalin Marinas <catalin.marinas@....com>,
        timur@...eaurora.org, linux-kernel@...r.kernel.org,
        Neil Leeder <nleeder@...eaurora.org>,
        Paolo Bonzini <pbonzini@...hat.com>,
        kvmarm@...ts.cs.columbia.edu, linux-arm-kernel@...ts.infradead.org
Subject: Re: [PATCH v4 3/4] arm64: Use __tlbi() macros in KVM code

On Wed, Feb 01, 2017 at 05:02:43PM +0000, Punit Agrawal wrote:
> Will Deacon <will.deacon@....com> writes:
> 
> > On Wed, Jan 25, 2017 at 08:39:43PM +0100, Christoffer Dall wrote:
> >> On Wed, Jan 25, 2017 at 10:52:31AM -0500, Christopher Covington wrote:
> >> > Refactor the KVM code to use the __tlbi macros, which will allow an errata
> >> > workaround that repeats tlbi dsb sequences to only change one location.
> >> > This is not intended to change the generated assembly and comparing before
> >> > and after vmlinux objdump shows no functional changes.
> >> > 
> >> > Signed-off-by: Christopher Covington <cov@...eaurora.org>
> >> 
> >> Acked-by: Christoffer Dall <christoffer.dall@...aro.org>
> >
> > Thanks, I'll queue this one via arm64.
> 
> I just noticed this patch but there's been a similar patch from Mark
> that I've been carrying as part of the KVM TLB monitoring series[0].
> 
> [0] http://www.mail-archive.com/kvmarm@lists.cs.columbia.edu/msg09359.html

Well I've already queued the one from Christopher. It's weird that Mark's
version appears to miss the local VMID case (but it does have the
flush_icache_all I wanted :).

Anyway, I'm not reverting anything, so you'll need to rebase when this
lot lands in mainline.

Will