[PATCH 0/3] Add support for privileged mappings

On Thu, Jul 07 2016 at 02:58:21 PM, Jordan Crouse [off-list ref] wrote:

quoted

Whilst this series is a step in the right direction for fixing that, I
don't think you can claim that only low-level users need this, given that
we have in-tree code which would break without it. Perhaps you just need
to extend things slightly more to expose this to the DMA API as well (or,
alternatively, hack the PL330 driver some how).

I agree that hacking the DMA api would be the best long term solution but there
be dragons there. Perhaps a workable compromise might be to white-list
privileged aware devices via the device tree.

I'm sending a v2 with an attempt at plumbing this through the DMA layer.
Hopefully avoiding dragons while I'm at it :)


-Mitch

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