On Tue, Aug 10, 2021 at 10:19 AM Mi, Dapeng1 wrote:
>
> Hi David,
>
> I like this patch set and this is crucial for reducing the significant vIOMMU
> performance. It looks you totally rewrite the IOMMU mapping/unmapping part
> and use the dynamically allocated memory from buddy system as bounce
6, 2021 6:34 PM
To: Robin Murphy
Cc: linux-ker...@vger.kernel.org; Sergey Senozhatsky
; iommu@lists.linux-foundation.org; David Stevens
; Will Deacon ; Christoph Hellwig
Subject: [PATCH v2 3/9] dma-iommu: bounce buffers for untrusted devices
From: David Stevens
Add support for dynamic bounce
Hi David,
Thank you for the patch! Perhaps something to improve:
[auto build test WARNING on iommu/next]
[also build test WARNING on drm-intel/for-linux-next hch-configfs/for-next
linus/master v5.14-rc4]
[cannot apply to next-20210805]
[If your patch is applied to the wrong git tree, kindly
From: David Stevens
Add support for dynamic bounce buffers to the dma-api for use with
subgranule IOMMU mappings with untrusted devices. Bounce buffer
management is split into two parts. First, there is a buffer manager
that is responsible for allocating and tracking buffers. Second, there
is a
