netdev - Re: cleanup unused or almost unused IOMMU APIs and the FSL PAMU driver

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Date:   Thu, 4 Mar 2021 12:10:04 +0100
From:   Joerg Roedel <joro@...tes.org>
To:     Christoph Hellwig <hch@....de>
Cc:     Will Deacon <will@...nel.org>, Li Yang <leoyang.li@....com>,
        Michael Ellerman <mpe@...erman.id.au>,
        David Woodhouse <dwmw2@...radead.org>,
        Lu Baolu <baolu.lu@...ux.intel.com>,
        linuxppc-dev@...ts.ozlabs.org, linux-arm-msm@...r.kernel.org,
        dri-devel@...ts.freedesktop.org, freedreno@...ts.freedesktop.org,
        iommu@...ts.linux-foundation.org,
        linux-arm-kernel@...ts.infradead.org, kvm@...r.kernel.org,
        virtualization@...ts.linux-foundation.org, netdev@...r.kernel.org
Subject: Re: cleanup unused or almost unused IOMMU APIs and the FSL PAMU
 driver

On Mon, Mar 01, 2021 at 09:42:40AM +0100, Christoph Hellwig wrote:
> Diffstat:
>  arch/powerpc/include/asm/fsl_pamu_stash.h   |   12 
>  drivers/gpu/drm/msm/adreno/adreno_gpu.c     |    2 
>  drivers/iommu/amd/iommu.c                   |   23 
>  drivers/iommu/arm/arm-smmu-v3/arm-smmu-v3.c |   85 ---
>  drivers/iommu/arm/arm-smmu/arm-smmu.c       |  122 +---
>  drivers/iommu/dma-iommu.c                   |    8 
>  drivers/iommu/fsl_pamu.c                    |  264 ----------
>  drivers/iommu/fsl_pamu.h                    |   10 
>  drivers/iommu/fsl_pamu_domain.c             |  694 ++--------------------------
>  drivers/iommu/fsl_pamu_domain.h             |   46 -
>  drivers/iommu/intel/iommu.c                 |   55 --
>  drivers/iommu/iommu.c                       |   75 ---
>  drivers/soc/fsl/qbman/qman_portal.c         |   56 --
>  drivers/vfio/vfio_iommu_type1.c             |   31 -
>  drivers/vhost/vdpa.c                        |   10 
>  include/linux/iommu.h                       |   81 ---
>  16 files changed, 214 insertions(+), 1360 deletions(-)

Nice cleanup, thanks. The fsl_pamu driver and interface has always been
a little bit of an alien compared to other IOMMU drivers. I am inclined
to merge this after -rc3 is out, given some reviews. Can you also please
add changelogs to the last three patches?

Thanks,

	Joerg