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    SubjectRe: [PATCH 4/4] dmaengine: idxd: Use DMA API for in-kernel DMA with PASID
    On 07-12-21, 16:27, Dave Jiang wrote:
    >
    > On 12/7/2021 6:47 AM, Jacob Pan wrote:
    > > In-kernel DMA should be managed by DMA mapping API. The existing kernel
    > > PASID support is based on the SVA machinery in SVA lib that is intended
    > > for user process SVA. The binding between a kernel PASID and kernel
    > > mapping has many flaws. See discussions in the link below.
    > >
    > > This patch utilizes iommu_enable_pasid_dma() to enable DSA to perform DMA
    > > requests with PASID under the same mapping managed by DMA mapping API.
    > > In addition, SVA-related bits for kernel DMA are removed. As a result,
    > > DSA users shall use DMA mapping API to obtain DMA handles instead of
    > > using kernel virtual addresses.
    > >
    > > Link: https://lore.kernel.org/linux-iommu/20210511194726.GP1002214@nvidia.com/
    > > Signed-off-by: Jacob Pan <jacob.jun.pan@linux.intel.com>
    >
    > Acked-by: Dave Jiang <dave.jiang@intel.com>
    >
    > Also cc Vinod and dmaengine@vger

    Pls resend collecting acks. I dont have this in my queue

    --
    ~Vinod

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