linux-kernel - Re: [PATCH v12 0/6] iommu/dma: s390 DMA API conversion and optimized IOTLB flushing

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Message-ID: <e949a91f-88b3-681e-6e0e-d5d1e8922284@arm.com>
Date:   Tue, 5 Sep 2023 17:09:15 +0100
From:   Robin Murphy <robin.murphy@....com>
To:     Matthew Rosato <mjrosato@...ux.ibm.com>,
        Niklas Schnelle <schnelle@...ux.ibm.com>,
        Joerg Roedel <joro@...tes.org>, Will Deacon <will@...nel.org>,
        Wenjia Zhang <wenjia@...ux.ibm.com>,
        Jason Gunthorpe <jgg@...pe.ca>
Cc:     Gerd Bayer <gbayer@...ux.ibm.com>,
        Julian Ruess <julianr@...ux.ibm.com>,
        Pierre Morel <pmorel@...ux.ibm.com>,
        Alexandra Winter <wintera@...ux.ibm.com>,
        Heiko Carstens <hca@...ux.ibm.com>,
        Vasily Gorbik <gor@...ux.ibm.com>,
        Alexander Gordeev <agordeev@...ux.ibm.com>,
        Christian Borntraeger <borntraeger@...ux.ibm.com>,
        Sven Schnelle <svens@...ux.ibm.com>,
        Suravee Suthikulpanit <suravee.suthikulpanit@....com>,
        Hector Martin <marcan@...can.st>,
        Sven Peter <sven@...npeter.dev>,
        Alyssa Rosenzweig <alyssa@...enzweig.io>,
        David Woodhouse <dwmw2@...radead.org>,
        Lu Baolu <baolu.lu@...ux.intel.com>,
        Andy Gross <agross@...nel.org>,
        Bjorn Andersson <andersson@...nel.org>,
        Konrad Dybcio <konrad.dybcio@...aro.org>,
        Yong Wu <yong.wu@...iatek.com>,
        Matthias Brugger <matthias.bgg@...il.com>,
        AngeloGioacchino Del Regno 
        <angelogioacchino.delregno@...labora.com>,
        Gerald Schaefer <gerald.schaefer@...ux.ibm.com>,
        Orson Zhai <orsonzhai@...il.com>,
        Baolin Wang <baolin.wang@...ux.alibaba.com>,
        Chunyan Zhang <zhang.lyra@...il.com>,
        Chen-Yu Tsai <wens@...e.org>,
        Jernej Skrabec <jernej.skrabec@...il.com>,
        Samuel Holland <samuel@...lland.org>,
        Thierry Reding <thierry.reding@...il.com>,
        Krishna Reddy <vdumpa@...dia.com>,
        Jonathan Hunter <jonathanh@...dia.com>,
        Jonathan Corbet <corbet@....net>, linux-s390@...r.kernel.org,
        netdev@...r.kernel.org, linux-kernel@...r.kernel.org,
        iommu@...ts.linux.dev, asahi@...ts.linux.dev,
        linux-arm-kernel@...ts.infradead.org,
        linux-arm-msm@...r.kernel.org, linux-mediatek@...ts.infradead.org,
        linux-sunxi@...ts.linux.dev, linux-tegra@...r.kernel.org,
        linux-doc@...r.kernel.org
Subject: Re: [PATCH v12 0/6] iommu/dma: s390 DMA API conversion and optimized
 IOTLB flushing

On 2023-08-25 19:26, Matthew Rosato wrote:
> On 8/25/23 6:11 AM, Niklas Schnelle wrote:
>> Hi All,
>>
>> This patch series converts s390's PCI support from its platform specific DMA
>> API implementation in arch/s390/pci/pci_dma.c to the common DMA IOMMU layer.
>> The conversion itself is done in patches 3-4 with patch 2 providing the final
>> necessary IOMMU driver improvement to handle s390's special IOTLB flush
>> out-of-resource indication in virtualized environments. The conversion
>> itself only touches the s390 IOMMU driver and s390 arch code moving over
>> remaining functions from the s390 DMA API implementation. No changes to
>> common code are necessary.
>>
> 
> I also picked up this latest version and ran various tests with ISM, mlx5 and some NVMe drives.  FWIW, I have been including versions of this series in my s390 dev environments for a number of months now and have also been building my s390 pci iommufd nested translation series on top of this, so it's seen quite a bit of testing from me at least.
> 
> So as far as I'm concerned anyway, this series is ready for -next (after the merge window).

Agreed; I'll trust your reviews for the s390-specific parts, so indeed 
it looks like this should have all it needs now and is ready for a nice 
long soak in -next once Joerg opens the tree for 6.7 material.

Cheers,
Robin.