Re: [Xen-devel] [PATCH v12 25/34] ARM: vITS: handle MAPD command

[Julien Grall <julien.grall@xxxxxxx>]

Hi Andre,

On 06/14/2017 05:52 PM, Andre Przywara wrote:
> The MAPD command maps a device by associating a memory region for
> storing ITEs with a certain device ID. Since it features a valid bit,
> MAPD also covers the "unmap" functionality, which we also cover here.
> We store the given guest physical address in the device table, and, if
> this command comes from Dom0, tell the host ITS driver about this new
> mapping, so it can issue the corresponding host MAPD command and create
> the required tables. We take care of rolling back actions should one
> step fail.
> Upon unmapping a device we make sure we clean up all associated
> resources and release the memory again.
> We use our existing guest memory access function to find the right ITT
> entry and store the mapping there (in guest memory).
>
> Signed-off-by: Andre Przywara <andre.przywara@xxxxxxx>
Acked-by: Julien Grall <julien.grall@xxxxxxx>

Cheers,

--
Julien Grall

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