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

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To: Zhen Lei <thunder.leizhen@xxxxxxxxxx>
Subject: Re: [PATCH v8 3/7] s390/pci: add support for IOMMU default DMA mode build options
From: Sebastian Ott <sebott@xxxxxxxxxxxxx>
Date: Mon, 3 Jun 2019 13:51:02 +0200 (CEST)
Cc: Jean-Philippe Brucker <jean-philippe.brucker@xxxxxxx>, John Garry <john.garry@xxxxxxxxxx>, Robin Murphy <robin.murphy@xxxxxxx>, Will Deacon <will.deacon@xxxxxxx>, Joerg Roedel <joro@xxxxxxxxxx>, Jonathan Corbet <corbet@xxxxxxx>, linux-doc <linux-doc@xxxxxxxxxxxxxxx>, Gerald Schaefer <gerald.schaefer@xxxxxxxxxx>, Martin Schwidefsky <schwidefsky@xxxxxxxxxx>, Heiko Carstens <heiko.carstens@xxxxxxxxxx>, Benjamin Herrenschmidt <benh@xxxxxxxxxxxxxxxxxxx>, Paul Mackerras <paulus@xxxxxxxxx>, Michael Ellerman <mpe@xxxxxxxxxxxxxx>, Tony Luck <tony.luck@xxxxxxxxx>, Fenghua Yu <fenghua.yu@xxxxxxxxx>, Thomas Gleixner <tglx@xxxxxxxxxxxxx>, Ingo Molnar <mingo@xxxxxxxxxx>, Borislav Petkov <bp@xxxxxxxxx>, "H . Peter Anvin" <hpa@xxxxxxxxx>, David Woodhouse <dwmw2@xxxxxxxxxxxxx>, iommu <iommu@xxxxxxxxxxxxxxxxxxxxxxxxxx>, linux-kernel <linux-kernel@xxxxxxxxxxxxxxx>, linux-s390 <linux-s390@xxxxxxxxxxxxxxx>, linuxppc-dev <linuxppc-dev@xxxxxxxxxxxxxxxx>, x86 <x86@xxxxxxxxxx>, linux-ia64 <linux-ia64@xxxxxxxxxxxxxxx>, Hanjun Guo <guohanjun@xxxxxxxxxx>
In-reply-to: <20190530034831.4184-4-thunder.leizhen@huawei.com>
Organization: "IBM Deutschland Research & Development GmbH / Vorsitzende des Aufsichtsrats: Matthias Hartmann Geschäftsführung: Dirk Wittkopp Sitz der Gesellschaft: Böblingen / Registergericht: Amtsgericht Stuttgart, HRB 243294"
References: <20190530034831.4184-1-thunder.leizhen@huawei.com> <20190530034831.4184-4-thunder.leizhen@huawei.com>
User-agent: Alpine 2.21 (LFD 202 2017-01-01)

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@xxxxxxxxxx>

Acked-by: Sebastian Ott <sebott@xxxxxxxxxxxxx>

References:
- [PATCH v8 0/7] iommu: enhance IOMMU default DMA mode build options
  - From: Zhen Lei
- [PATCH v8 3/7] s390/pci: add support for IOMMU default DMA mode build options
  - From: Zhen Lei

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