Re: [PATCH V4 09/24] xen/ioreq: Make x86's IOREQ related dm-op handling common

[Jan Beulich <jbeulich@xxxxxxxx>]

On 12.01.2021 22:52, 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
> moves the IOREQ related dm-op handling to the common code.
> 
> The idea is to have the top level dm-op handling arch-specific
> and call into ioreq_server_dm_op() for otherwise unhandled ops.
> Pros:
> - More natural than doing it other way around (top level dm-op
> handling common).
> - Leave compat_dm_op() in x86 code.
> Cons:
> - Code duplication. Both arches have to duplicate do_dm_op(), etc.
> 
> 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>
> [On Arm only]
> Tested-by: Wei Chen <Wei.Chen@xxxxxxx>

Assuming the moved code is indeed just being moved (which is
quite hard to ascertain by just looking at the diff),
applicable parts
Acked-by: Jan Beulich <jbeulich@xxxxxxxx>

Jan