lkml.org 
[lkml]   [2021]   [Feb]   [1]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
    /
    Date
    From
    SubjectRe: [RFC PATCH v2] uacce: Add uacce_ctrl misc device
    On Fri, Jan 29, 2021 at 10:09:03AM +0000, Tian, Kevin wrote:
    > > SVA is not doom to work with IO page fault only. If we have SVA+pin,
    > > we would get both sharing address and stable I/O latency.
    >
    > Isn't it like a traditional MAP_DMA API (imply pinning) plus specifying
    > cpu_va of the memory pool as the iova?

    I think their issue is the HW can't do the cpu_va trick without also
    involving the system IOMMU in a SVA mode

    It really is something that belongs under some general /dev/sva as we
    talked on the vfio thread

    Jason

    \
     
     \ /
      Last update: 2021-02-02 00:46    [W:2.930 / U:0.540 seconds]
    ©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site