Re: [PATCH V3 09/23] xen/dm: Make x86's DM feature common

[Jan Beulich <jbeulich@xxxxxxxx>]

On 30.11.2020 11:31, Oleksandr Tyshchenko wrote:
> From: Julien Grall <julien.grall@xxxxxxx>
> 
> As a lot of x86 code can be re-used on Arm later on, this patch
> splits devicemodel support into common and arch specific parts.
> 
> The common DM feature is supposed to be built with IOREQ_SERVER
> option enabled (as well as the IOREQ feature), which is selected
> for x86's config HVM for now.
> 
> Also update XSM code a bit to let DM op be used on Arm.
> 
> This support is going to be used on Arm to be able run device
> emulator outside of Xen hypervisor.
> 
> Signed-off-by: Julien Grall <julien.grall@xxxxxxx>
> Signed-off-by: Oleksandr Tyshchenko <oleksandr_tyshchenko@xxxxxxxx>
> 
> ---
> Please note, this is a split/cleanup/hardening of Julien's PoC:
> "Add support for Guest IO forwarding to a device emulator"
> 
> Changes RFC -> V1:
>    - update XSM, related changes were pulled from:
>      [RFC PATCH V1 04/12] xen/arm: Introduce arch specific bits for IOREQ/DM 
> features
> 
> Changes V1 -> V2:
>    - update the author of a patch
>    - update patch description
>    - introduce xen/dm.h and move definitions here
> 
> Changes V2 -> V3:
>    - no changes

And my concern regarding the common vs arch nesting also hasn't
changed.

Jan