linux-kernel - Re: [PATCH v8 3/7] s390/pci: add support for IOMMU default DMA mode build options

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Message-Id: <alpine.LFD.2.21.1906031350240.18543@schleppi>
Date:   Mon, 3 Jun 2019 13:51:02 +0200 (CEST)
From:   Sebastian Ott <sebott@...ux.ibm.com>
To:     Zhen Lei <thunder.leizhen@...wei.com>
cc:     Jean-Philippe Brucker <jean-philippe.brucker@....com>,
        John Garry <john.garry@...wei.com>,
        Robin Murphy <robin.murphy@....com>,
        Will Deacon <will.deacon@....com>,
        Joerg Roedel <joro@...tes.org>,
        Jonathan Corbet <corbet@....net>,
        linux-doc <linux-doc@...r.kernel.org>,
        Gerald Schaefer <gerald.schaefer@...ibm.com>,
        Martin Schwidefsky <schwidefsky@...ibm.com>,
        Heiko Carstens <heiko.carstens@...ibm.com>,
        Benjamin Herrenschmidt <benh@...nel.crashing.org>,
        Paul Mackerras <paulus@...ba.org>,
        Michael Ellerman <mpe@...erman.id.au>,
        Tony Luck <tony.luck@...el.com>,
        Fenghua Yu <fenghua.yu@...el.com>,
        Thomas Gleixner <tglx@...utronix.de>,
        Ingo Molnar <mingo@...hat.com>, Borislav Petkov <bp@...en8.de>,
        "H . Peter Anvin" <hpa@...or.com>,
        David Woodhouse <dwmw2@...radead.org>,
        iommu <iommu@...ts.linux-foundation.org>,
        linux-kernel <linux-kernel@...r.kernel.org>,
        linux-s390 <linux-s390@...r.kernel.org>,
        linuxppc-dev <linuxppc-dev@...ts.ozlabs.org>,
        x86 <x86@...nel.org>, linux-ia64 <linux-ia64@...r.kernel.org>,
        Hanjun Guo <guohanjun@...wei.com>
Subject: Re: [PATCH v8 3/7] s390/pci: add support for IOMMU default DMA mode
 build options


On Thu, 30 May 2019, Zhen Lei wrote:
> The default DMA mode is LAZY on s390, this patch make it can be set to
> STRICT at build time. It can be overridden by boot option.
> 
> There is no functional change.
> 
> Signed-off-by: Zhen Lei <thunder.leizhen@...wei.com>

Acked-by: Sebastian Ott <sebott@...ux.ibm.com>