linux-kernel - Re: [PATCH 0/5] Simplify vfio_iommu

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Message-ID: <d357966b-7abd-f8f3-3ca7-3c99f5e075b9@linux.intel.com>
Date:   Tue, 7 Jun 2022 15:44:43 +0800
From:   Baolu Lu <baolu.lu@...ux.intel.com>
To:     Nicolin Chen <nicolinc@...dia.com>, jgg@...dia.com,
        joro@...tes.org, will@...nel.org, marcan@...can.st,
        sven@...npeter.dev, robin.murphy@....com, robdclark@...il.com,
        m.szyprowski@...sung.com, krzysztof.kozlowski@...aro.org,
        agross@...nel.org, bjorn.andersson@...aro.org,
        matthias.bgg@...il.com, heiko@...ech.de, orsonzhai@...il.com,
        baolin.wang7@...il.com, zhang.lyra@...il.com, wens@...e.org,
        jernej.skrabec@...il.com, samuel@...lland.org,
        jean-philippe@...aro.org, alex.williamson@...hat.com
Cc:     baolu.lu@...ux.intel.com, suravee.suthikulpanit@....com,
        alyssa@...enzweig.io, alim.akhtar@...sung.com, dwmw2@...radead.org,
        yong.wu@...iatek.com, mjrosato@...ux.ibm.com,
        gerald.schaefer@...ux.ibm.com, thierry.reding@...il.com,
        vdumpa@...dia.com, jonathanh@...dia.com, cohuck@...hat.com,
        iommu@...ts.linux-foundation.org, linux-kernel@...r.kernel.org,
        linux-arm-kernel@...ts.infradead.org,
        linux-arm-msm@...r.kernel.org, linux-samsung-soc@...r.kernel.org,
        linux-mediatek@...ts.infradead.org,
        linux-rockchip@...ts.infradead.org, linux-s390@...r.kernel.org,
        linux-sunxi@...ts.linux.dev, linux-tegra@...r.kernel.org,
        virtualization@...ts.linux-foundation.org, kvm@...r.kernel.org
Subject: Re: [PATCH 0/5] Simplify vfio_iommu_type1 attach/detach routine

On 2022/6/6 14:19, Nicolin Chen wrote:
> Worths mentioning the exact match for enforce_cache_coherency is removed
> with this series, since there's very less value in doing that since KVM
> won't be able to take advantage of it -- this just wastes domain memory.
> Instead, we rely on Intel IOMMU driver taking care of that internally.

After reading this series, I don't see that Intel IOMMU driver needs any
further change to support the new scheme. Did I miss anything?

Best regards,
baolu