lkml.org 
[lkml]   [2021]   [Dec]   [8]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
Date
From
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

\
 
 \ /
  Last update: 2021-12-08 05:56    [W:0.125 / U:0.192 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site