linux-kernel - Re: [PATCH v4 04/20] iommu: Introduce iotlb_sync

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Message-ID: <20180924100628.GF21032@ulmo>
Date:   Mon, 24 Sep 2018 12:06:28 +0200
From:   Thierry Reding <thierry.reding@...il.com>
To:     Dmitry Osipenko <digetx@...il.com>
Cc:     Jonathan Hunter <jonathanh@...dia.com>,
        Joerg Roedel <joro@...tes.org>,
        Rob Herring <robh+dt@...nel.org>,
        Robin Murphy <robin.murphy@....com>,
        iommu@...ts.linux-foundation.org, devicetree@...r.kernel.org,
        linux-tegra@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH v4 04/20] iommu: Introduce iotlb_sync_map callback

On Mon, Sep 24, 2018 at 03:41:37AM +0300, Dmitry Osipenko wrote:
> Introduce iotlb_sync_map() callback that is invoked in the end of
> iommu_map(). This new callback allows IOMMU drivers to avoid syncing
> after mapping of each contiguous chunk and sync only when the whole
> mapping is completed, optimizing performance of the mapping operation.
> 
> Signed-off-by: Dmitry Osipenko <digetx@...il.com>
> Reviewed-by: Robin Murphy <robin.murphy@....com>
> ---
>  drivers/iommu/iommu.c | 8 ++++++--
>  include/linux/iommu.h | 1 +
>  2 files changed, 7 insertions(+), 2 deletions(-)

Reviewed-by: Thierry Reding <treding@...dia.com>

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